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841. 题目: Multiphase Coupling of Phosphorus and Organic Matter across Water–Particle Interaction in Aquaculture Ponds
文章编号: N26062613
期刊: Journal of Hazardous Materials
作者: Xiangcheng Kong, Sarah E Rice, Harlow S Kramer-Dew, Andrew R Zimmerman, Christopher J Martyniuk, Young Gu Her, Eban Bean, Jonathan D Judy, Yuncong Li, Alan E Wilson, Dengjun Wang
更新时间: 2026-06-26
摘要: The roles of suspended particulate matter in regulating phosphorus (P) and organic matter (OM) cycling remain unclear. We investigated 21 catfish aquaculture ponds across four seasons in 2024–2025 to quantify how seasonality and particle size regulate P–OM interactions. Water samples were separated into five suspended particle-size fractions (>1,000, 1,000–450, 450–100, 100–50, and 50–1nm) and the truly dissolved phase (<1nm). We integrated Hedley’s sequential extraction, 31P nuclear magnetic resonance spectroscopy, and fluorescence excitation-emission matrix–parallel factor modeling (EEM–PARAFAC) to characterize size-dependent P pools, molecular P signatures, and dissolved- vs. particle-associated OM interactions. Particle mass showed strong seasonal variability, with summer exhibiting substantially higher particle loads, whereas fall showed one-order of magnitude lower particle abundance. Hedley’s extraction results showed NaOH-extractable P dominated particulate P pool, while nanoparticles were enriched in exchangeable P fractions (water- and NaHCO3-extractable P). These results indicate decoupling between particle mass and P reactivity, with nanoparticles serving as highly reactive intermediates for rapid dissolved–particulate P exchange. 31P NMR detected orthophosphate across all size fractions, whereas organic monoester P was consistently enriched in larger submicron particles and became weak or undetectable in < 100nm size fraction. EEM–PARAFAC further linked elevated dissolved P availability with protein-like and labile OM signatures, suggesting enhanced microbial processing and OM-associated nutrient recycling under high-P conditions. Our findings suggest that nanoparticles act as reactive intermediates for dissolved–particulate P exchange; meanwhile, OM composition and microbial transformation processes further regulate the bioavailability of particle-bound P

842. 题目: Rapid nitroglycerin removal using nZVI-Biochar: A comprehensive investigation on treatment fate, byproduct kinetics, reaction pathway modeling and statistical optimization
文章编号: N26062612
期刊: Journal of Hazardous Materials
作者: Roxana Rahmati, Christos Giannopoulos, Andrew Mai, Christos Christodoulatos, Washington Braida, Dibyendu Sarkar
更新时间: 2026-06-26
摘要: Rice hull biochar doped with zerovalent iron nanoparticles (nZVI-RBC) has been used for the degradation of various contaminants; however, there is limited information available on the treatment of nitroglycerin (NG), a compound found in untreated wastewater from pharmaceutical and munition industries. This study used an integrated approach combining empirical data and modelling to determine: 1) experimental results, 2) reaction kinetics modelling, and 3) statistically based treatment optimization. The impact of various operational and synthesis parameters on treatment was determined experimentally, and kinetic modelling was employed to provide insights into the underlying degradation reactions and mechanisms. nZVI-RBC treatment applied to NG resulted in carbon mass balance closure of 95-99%. The byproducts were identified and indicated reductive degradation via denitration to benign glycerol as the end-product. More than 96% of NG removal was observed within 30minutes of reaction time in most conditions. nZVI-RBC was effective in degrading NG in a wide range pH range of 3 - 9. The kinetic models developed consisted of two degradation pathways: 1) sequential denitration, and 2) concurrent denitration (i.e. bypassing intermediate byproduct formation). Kinetic modeling indicated that degradation via concurrent denitration directly to glycerol was more prevalent. Treatment optimization was studied to determine the statistically significant factors; a multilinear regression (MLR) model was developed and correlation coefficients were determined for iron %, biochar content, initial pH and pyrolysis temperature. The MLR model also suggested that enhancing the NG degradation rate will likely contribute to byproduct accumulation in the system.

843. 题目: Divergent mercury dynamics linked to POM-to-MAOM shifts in Tibetan Plateau thermokarst soils
文章编号: N26062611
期刊: Journal of Hazardous Materials
作者: Xiufeng Yin, Zhiwei Liu, Wenting Zhou, Xiaodong Wu, Xin Xiong, Qianggong Zhang, Huhu Kang, Tanuj Shukla, Shichang Kang
更新时间: 2026-06-26
摘要: Thermokarst development restructures soil profiles and hydrological pathways, but whether contrasting landforms lead to different mercury (Hg) trajectories remains unclear. Here, we compared an open-slope thaw slump (Eboling) and a closed-depression thaw subsidence (Amdo) on the Tibetan Plateau using soil physical fractionation into particulate organic matter (POM) and mineral-associated organic matter (MAOM). At both sites, permafrost degradation drove a common redistribution of Hg from POM to MAOM, as evidenced by increasing MAOM-Hg proportion in total Hg. Despite this shared fraction-level response, net Hg outcomes diverged fundamentally between landforms. At Eboling (control to exposed), total Hg concentration increased from 42.94 ± 13.73 to 57.35 ± 17.50ngg⁻¹ (+33.6%), MAOM-Hg concentration increased 93.9%, and Hg stock rose by 234.3%, with the bulk Hg/SOC ratio increasing—indicating progressive Hg enrichment. In contrast, at Amdo (control to subsided), total Hg concentration decreased from 21.76 ± 6.20 to 10.08 ± 2.72ngg⁻¹ (−53.7%), with POM-Hg and MAOM-Hg concentrations declining by 72.7% and 45.2%, respectively. Hg stock decreased by 12.2%, with the bulk Hg/SOC ratio remaining constant—indicating coupled Hg-organic matter loss. Principal component analysis further linked degraded Eboling soils with Hg stock and MAOM-Hg, while subsided Amdo soils showed weaker association with mineral-related Hg retention. This divergence is explained by landform-specific controls: at the open-slope thaw slump, strong lateral redistribution and higher iron/aluminum oxide contents favored Hg retention; at the closed-depression thaw subsidence, localized subsidence and reduced Hg retention in the mineral-associated fraction led to coupled Hg–organic matter loss. Our findings demonstrate that permafrost degradation drives a common Hg redistribution from POM to MAOM, but that net source–sink outcomes are landform-dependent—a key insight for regional Hg cycling assessments under climate warming.

844. 题目: Breaking lignin barrier for co-producing hydrochar and crop salinity stress biostimulants
文章编号: N26062610
期刊: Chemical Engineering Journal
作者: Fangfang Wu, Qianyi Deng, Wenqing Chen, Xueyi Zhong, Yanying He, Yixian Feng, Nijia Chen, Kai Qiu, Dingli Chen, Xueying Mo, Siyuan Chen, Long Chen, Jing Zhang, Yunsi Xie, Wei Xiao, Baobin Mi, Sha Yang
更新时间: 2026-06-26
摘要: Hydrothermal carbonization (HTC) emerges as a promising technology for biomass valorization and carbon-negative energy systems. Nevertheless, lignin—a vital structural component in biomass—paradoxically imposes severe recalcitrance in conventional HTC, while aqueous byproducts (liquid fraction) remain an underutilized resource. Here, we develop a mild HTC strategy (200 °C) co-driven by phosphoric acid and formaldehyde, which synergistically overcomes lignin barriers through a depolymerization–crosslinking mechanism to achieve near-complete biomass valorization, concurrently boosting hydrochar production and generating plant biostimulants. This approach delivers an unprecedented ~6-fold increase in lignin-derived hydrochar yield while enhancing hydrochar production across diverse biomasses. Crucially, the valorized liquid fraction demonstrates exceptional biostimulant activity in both dryland and paddy crops, effectively alleviating salt stress via hydrophobic humic acid-like substances. Our work pioneers a closed-loop paradigm integrating “multi-component valorization–agricultural application” within HTC. This “waste-to-trait” strategy synchronously dismantles lignin conversion barriers and neutralizes hydrothermal liquid hazards, establishing a circular pathway for carbon-negative biomass utilization and sustainable agriculture.

845. 题目: Employing a Hiblack carbon-based gas diffusion electrode for in situ H2O2 generation while valorizing urine organic matter
文章编号: N26062609
期刊: Chemical Engineering Journal
作者: Raul José Alves Felisardo, Oswaldo Costa Junior, Raira Souza de Santana Castro, Rafael Granados-Fernández, Marcos R V Lanza, Manuel A Rodrigo
更新时间: 2026-06-26
摘要: Electrogeneration of hydrogen peroxide (H2O2) is a promising strategy for the electrochemical treatment of effluents, particularly based on the two-electron oxygen reduction (2e− ORR). In this study, a gas diffusion electrode (GDE) based on HIBLACK carbon (HBC) was developed and its application in H2O2 production was evaluated in a closed-loop continuous-flow electrochemical reactor, aiming at its use as an oxidant for degrading organic matter in synthetic urine. Electrochemical characterization using a rotating ring–disk electrode (RRDE), under acidic conditions, demonstrated high selectivity toward H2O2, exceeding 92%. The structural and surface properties of HBC were investigated and revealed features favorable to the 2e− ORR. H2O2 electrogeneration experiments were carried out at two volumetric flow rates (0.4 and 0.8 L min−1) and three current densities (7.5, 15, and 30 mA cm−2). H2O2 production in Na2SO4 was compared with that obtained in the inorganic matrix of synthetic urine, while maintaining the same ionic strength and pH. A current density of 30 mA cm−2 showed the best performance, resulting in the highest H2O2 concentrations. A difference of 343 mg L−1 was observed between the concentrations achieved in Na2SO4 and in synthetic urine, which was attributed to the complexity of the urinary matrix. The combined AO/e-H2O2/UVC process promoted complete degradation of uric acid, partial degradation of urea and creatinine, and an overall limited mineralization corresponding to 135.57 mg L−1, approximately 18%. Notably, about 31% of the degraded organic matter was converted into value-added products, namely carboxylic acids (formic: 3.93 mg L−1, oxalic: 134.17 mg L−1 and acetic: 35.71 mg L−1), highlighting the potential of this system for decentralized sanitation coupled with resource recovery.

846. 题目: Artificial dissolved organic matter regulates soil metabolism to optimize wheat productivity: Linking rhizosphere microbial shifts and molecular metabolic pathways
文章编号: N26062608
期刊: Chemical Engineering Journal
作者: Yahui Ji, Chuanxi Wang, Junjie Lin, Bingyu Wang, Shiying He, Guodong Fang, Lisha Wang, Yuanyuan Feng, Yanfang Feng, Lihong Xue, Zhenyu Wang, Baoshan Xing
更新时间: 2026-06-26
摘要: The liquid-phase product of hydrothermal carbonization technology is a common type of artificial dissolved organic matter (ADOM), rich in nutrients and organic matter. Although ADOM is widely recognized as an underutilized resource with growing scientific interest, its capacity to enhance crop productivity through soil metabolic regulation remains underexplored. In this field-based microzone study, we systematically investigated the effects of ADOM supplementation (applied additionally during each fertilization period alongside conventional fertilization) on soil metabolites and microbial dynamics. Compared with conventional fertilization, ADOM significantly increased substances such as lignin-like compounds in the soil, and consequently up-regulated nucleotide, amino acid, and vitamin metabolic pathways. ADOM attracted beneficial rhizosphere microorganisms including Ascomycota, Actinobacteriota, Basidiomycota, and Kickxellomycota, which contributed to the improvement of photosynthesis, nitrogen fixation, and the degradation of complex aromatic compounds. Non-targeted metabolomics also confirmed that ADOM enhanced the relative abundance of specific soil metabolites, increasing certain heterocyclic compounds by up to 56-fold and alkaloids by up to 19-fold at the heading stage. Structural equation modeling identified synergistic interactions among soil properties, microbial communities, and metabolites as key drivers of the observed 19.7–21.7% yield enhancement. These findings highlight the potential of ADOM application in agricultural soils as a sustainable practice for yield optimization.

847. 题目: Boron-doped sludge biochar to efficiently activate ferrate (VI) for sulfonamides removal with a wider pH range in waters: Transforming and evolving pathways of reactive species
文章编号: N26062607
期刊: Chemical Engineering Journal
作者: Zhikang Deng, Jinyao Zhu, Xi Chen, Minghui Xiang, Zulin Zhang
更新时间: 2026-06-26
摘要: Ferrate (VI) (Fe (VI))-based oxidation system possessed multiple functions for water treatment, however, a stable pH environment was essential for ensuring the efficiency. This study used facile pyrolysis to synthesize boron-doped sludge-derived biochar (BSBC), which effectively activated Fe (VI) and mitigated the pH dependence of the reaction system. The Fe (VI)/BSBC system (0.40 g/L of BSBC and 100 μM of Fe (VI)) achieved 96.54% removal rate of sulfamethoxazole (SMX) with overcoming the pH dependency of Fe (VI) in the reaction. The mechanism analysis indicated that BSBC shifted Fe (VI) activation pathway from electron transfer toward reactive oxygen species (ROS) production with Fe (IV/V) formed in different reaction solutions. Deeper mineralization was facilitated in water by a more diverse oxidizing species. The non-radical removal pathways conferred stronger anti-interference ability and broader pH range to the Fe (VI)/BSBC system. The Fe (VI)/BSBC system demonstrated its practical viability by sustaining stable catalytic activity over multiple cycles, achieving high removal rates in different real waters, and operating robustly in a continuous-flow setup. Combined characterization and theoretical calculations confirmed that O-B-O configurations reconfigured the electronic structure by generating electron-rich regions and reduced the bandgap, thereby enhancing electron transfer and Fe (VI) activation. Three major degradation pathways of SMX were proposed, and it was confirmed that the products exhibited reduced ecological toxicity. This study elucidated a novel mechanism for Fe (VI) activation by BSBC in water and established a fundamental theoretical framework to guide the practical application of Fe (VI)-based removal technologies.

848. 题目: Global sublinear scaling between soil microbial biomass carbon and soil organic carbon across biomes
文章编号: N26062606
期刊: Applied Soil Ecology
作者: Amitava Chatterjee
更新时间: 2026-06-26
摘要: Soil microbial biomass carbon (MBC) plays a central role in predicting soil health, yet global-scale relationships between MBC and soil organic carbon (SOC) across biomes remain insufficiently quantified. Using a global surface (0–30 cm depth) soil dataset (n = 2008), how MBC scales with SOC and soil pH were evaluated using pedotransfer functions, metabolic scaling concepts, and machine learning approaches. On a log-log scale, MBC exhibited consistent sublinear scaling with SOC (β = 0.75), indicating diminishing microbial biomass accumulation with increasing SOC levels. The scaling exponent remained stable after excluding pH (β = 0.69), and bootstrap resampling confirmed statistical robustness (95% CI: 0.68–0.77). A parsimonious log-linear model explained 61.7% of global variation in MBC and performed comparably to Random Forest models evaluated using a spatial cross-validation model (R2 = 0.54), suggesting that the dominant SOC-MBC relationship is fundamentally linear after logarithmic transformation. Biome-specific interaction models produced modest improvements in model fit (R2 = 0.68), indicating ecosystem modulation of scaling strength while preserving a consistent global pattern. Variance partitioning identified SOC as the primary driver of spatial variation in MBC. These findings revealed a globally conserved, yet sublinear, coupling between MBC and SOC, suggesting a decreasing microbial biomass accumulation efficiency at higher SOC levels. Incorporating empirically derived scaling relationships into Earth system models may improve predictions of microbial contributions to SOC dynamics.

849. 题目: ZY1-02D satellite spectral inversion of organic matter in highland mountainous red soils based on electric eel optimisation feature extraction and hybrid liquid neural network fusion
文章编号: N26062605
期刊: Journal of Hydrology
作者: Chengbiao Fu, Zexin Zhang, Anhong Tian
更新时间: 2026-06-26
摘要: Soil serves as the pivotal hub of terrestrial carbon cycling, and the full realisation of its carbon sequestration potential can contribute to mitigating global climate change. Variations in soil organic matter influence the global carbon cycle, with its quantity and quality directly determining soil productivity and sustainable utilisation levels. This study investigates the highland red soils of Dongchuan District, Kunming City, Yunnan Province, China. Utilising ground-based ASD hyperspectral and ZY1-02D satellite hyperspectral imagery as data sources, a multi-branch deep prediction model (M-LNN) incorporating liquid neural networks is proposed for quantitative inversion of red soil organic matter content. This model effectively extracts local spectral features, continuous dynamic characteristics, and long-term dependency information from hyperspectral data, thereby enhancing the prediction accuracy of organic matter. It incorporates multiple network architectures, employing parallel fusion of CNN, LNN, LSTM, and GRU networks to address limitations of LNN in hyperspectral inversion. Attention mechanisms are incorporated into each branch to refine the M-LNN, while multiple strategies enhance the traditional IEEFO algorithm to identify organic matter-sensitive spectral bands. The model demonstrated robust performance on ASD data with R2 = 0.8175, RMSE = 8.4713, RPD = 2.3410, and RPIQ = 2.4731. On ZY1-02D data, it achieved R2 = 0.5708, RMSE = 12.7520, RPD = 1.5264, and RPIQ = 2.5212, due to limitations in satellite spectral resolution, atmospheric interference, and surface heterogeneity, this level of accuracy is considered moderate, and the model’s ability to generalize to satellite data still needs to be further improved. Concurrently, SHAP analysis confirms the interpretability of the proposed IEEFO algorithm for screening organic matter-sensitive bands, and maps the spatial distribution of organic matter in red soils. This study provides a novel framework for predicting organic matter content in Yunnan Plateau red soils, offering scientific data references for regional soil fertility assessment and precision agricultural decision-making.

850. 题目: Size-dependent mitigation by humic acid: rescuing metabolic homeostasis from nano-plastics but not micro-plastics in Microcystis aeruginosa
文章编号: N26062604
期刊: Frontiers in Environmental Science
作者: Lingmin Kong, Yiying Jiao, Fenglin Xu, Shihao Xu, Mo Chen, Liang Wan, Xiaofang Tian
更新时间: 2026-06-26
摘要: Microplastics (MPs) are ubiquitous freshwater contaminants, yet their combined effects with humic acid (HA) on phytoplankton remain poorly understood. This study investigated the physiological and metabolic responses of Microcystis aeruginosa exposed to polystyrene microplastics (PS) (0.1 µm and 1.0 µm; 0.5–50 mg/L) with or without HA (5 mg/L). PS exposure promoted chlorophyll a (Chl a) synthesis but induced oxidative stress and enhanced extracellular polymeric substance (EPS) secretion. HA modulated these effects in a size-dependent manner: it further enhanced Chl a synthesis under 1.0 μm PS stress but suppressed it under 0.1 μm PS stress. Furthermore, HA effectively mitigated oxidative stress at high-concentration PS exposures. Loosely bound EPS (LB-EPS) was the most sensitive fraction, exhibiting increased humic- and protein-like fluorescence under co-exposure to micro-sized PS and HA. Metabolomics revealed that nano-sized PS disrupted primary metabolism, whereas micro-sized PS triggered defensive secondary metabolism. HA restored metabolic homeostasis specifically under nano-sized PS stress. Ultimately, HA plays a dual, particle-size-dependent role in regulating PS toxicity, clarifying the ecological implications of MP-organic matter interactions.

851. 题目: Boron-doped coconut shell biochar as particle electrode for peroxymonosulfate activation in electrochemical degradation of pyridine
文章编号: N26062603
期刊: Chemical Engineering Journal
作者: Lei He, Yuxian Ji, Chunrong Wang, Dan Liu, Yang Li, Tayyebeh Soltani, Di Wu, Philippe M Heynderickx
更新时间: 2026-06-26
摘要: Pyridine is a refractory nitrogenous heterocyclic pollutant, with its stable pyridinic-N being the key remediation bottleneck. In this study, Boron-doped coconut shell biochar (BC@B) was utilized in the three-dimensional (3D) electrochemical as a dual-function particle electrode by integrating electrochemical catalysis with peroxymonosulfate (PMS) activation. Boron exhibited an enhancement effect on the physico-chemical characteristics of BC. The introduction of BC@B significantly enhanced pyridine degradation, which followed pseudo-first order kinetics with the rate coefficient (kobs) from 0.019 ± 0.0042 to 0.39 ± 0.026 min−1 in electrochemical oxidation (EO)/BC@B/PMS 3D system, which are higher than that in EO/PMS 2D system. Quenching experiments and electron paramagnetic resonance (EPR) revealed radical pathway (SO4●– and HO●) contributed to pyridine degradation. Through the electrochemical analysis and theoretical calculations, it was concluded that the pyridine degradation was greatly related to the -O-B-O configuration embedded into the isolated carbon–carbon double bonds at the BC edge. Boron-doped reduced the energy gap (ΔE) between the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO), thereby promoting electron transfer and increasing PMS activation efficiency by approximately 17% compared to 2D system. Furthermore, boron-doped induces the rearrangement of local electron cloud density, promoting thermodynamic spontaneous formation of BC@B-PMS* complex. A non-radical pathway mediated by BC@B-PMS* complex was established, enabling electron transfer from pyridine to PMS and improving the pyridine degradation. The BC@B showed excellent catalytic performance after being reused for 6 times. System comparison confirmed the EO/BC@B/PMS system possessed the perfect pyridine degradation performance and favorable real coking wastewater treatment. Therefore, this study provides an efficient particle electrode for pyridine degradation and further verifies its application feasibility for real coking wastewater remediation.

852. 题目: Insights into EPS-mediated simultaneous dewatering and stabilization of landfilled tannery sludge via combined chemical conditioning and PVD-vacuum preloading
文章编号: N26062602
期刊: Chemical Engineering Journal
作者: Yang Xu, Fei Jin, Xiaowen Liu, Weixin Cheng, Ran Yu, Jia-Lei Wan, Jia-Hao Xie, Yan-Jun Du
更新时间: 2026-06-26
摘要: Landfilled tannery sludge poses severe challenges for in situ dewatering and safe disposal due to high water content and concentrations of Cr and Zn, and abundant extracellular polymeric substance (EPS). This study conditioned unregulated landfilled tannery sludge with polymeric ferric sulfate (PFS) and calcium carbide residue (CCR), and systematically investigated the EPS-driven dewatering, heavy metal immobilization, and clogging mechanisms during prefabricated vertical drain (PVD)-vacuum preloading through microscopic and PVD-vacuum preloading model tests. Both specific resistance to filtration (SRF) and capillary suction time correlated exponentially with total EPS content (R2 = 0.99). PFS-CCR conditioning extensively disrupted EPS fractions and reduced SRF by two orders of magnitude (4.58 × 1014 to 1.68 × 1012 m/kg). Total EPS content also correlated linearly with Cr and Zn leaching concentrations (R2 = 0.92–0.96). Cr and Zn immobilization followed a three-stage sequence of EPS disruption, release, and re-immobilization, increasing the residual fractions of Cr and Zn from 25.7% and 20.9% to 73.0% and 75.2%, respectively. PVD-vacuum preloading model tests revealed, for the first time, radial migration of EPS and colloidal particles toward the PVD, with their changes significantly correlated with changes in heavy metal leaching concentrations. In unconditioned sludge, the EPS gel network entrapped colloidal particles and heavy metals, co-migrating toward the PVD and inducing clogging at the filter membrane and pore throats, resulting in poor dewatering. PFS-CCR conditioning disrupted the EPS gel network, suppressed migration of EPS and colloidal particles, and reduced water content below 60% at all radial positions, with uniform heavy metal leaching concentrations meeting remediation targets.

853. 题目: Molecular-Level Analysis of Chemical Transformation of Algal Extracellular Organic Matter during Seawater Ozonation: Dominant Reaction Pathways and Impacts of Halide Ions
文章编号: N26062601
期刊: Water Research
作者: Weilong Yang, Hoon Oh, Haoyu Luo, Eun-Tae Yun, Jaewon Lee, Yunho Lee, Bing Wu, Min Zhan, Jaesang Lee
更新时间: 2026-06-26
摘要: Halide-rich matrices inevitably influence ozonation performance and transformation pathways, yet molecular-level insights into how seawater composition governs organic matter conversion and byproduct formation remain limited. This study presents the application of Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) to elucidate O3-driven transformation pathways of algae-derived extracellular organic matter (EOM) in a seawater matrix and to delineate the concomitant contribution of halogen-based oxidants to EOM compositional evolution. Bulk optical analyses showed that EOM enriched in highly O3-labile protein-like constituents progressively fragmented into aliphatic fractions via humified intermediates. Consistently, FT-ICR-MS revealed a monotonic compositional shift toward aliphatic and highly unsaturated aromatic fractions, with minimal nitrogen and sulfur loss under competition between EOM and background halides for O3. Molecular descriptors and paired mass difference analyses indicated increasing oxidation state and saturation degree, dominated by oxygenation and dealkylation routes, whereas carbonyl functionalization coupled with dehydrogenation elevated double bond equivalents at high O3 dosages. In halide-laden seawater, ozonation preferentially promoted the formation of brominated disinfection byproducts (Br-DBPs) via electrophilic addition (+HOBr) and substitution (+Br-H) mediated by non-radical reactive bromine species selectively targeting lignin-like moieties, while halogen exchange reactions reduced the relative abundance of Cl-DBPs. I-DBPs likely originated not only from iodine-centered radical iodination but also from coupled iodination/non-iodination pathways (e.g., decarboxylation and dealkylation). From a practical perspective, molecular-level identification of EOM oxidation products enables assessment of O3-induced variations in membrane fouling propensity while concurrently unveiling potential toxicity risks associated with previously unrecognized X-DBPs that may be discharged into permeate or concentrate streams.

854. 题目: Shaping Antibiotic Resistance Gene Fate in Soil-Plant Systems: Dual Roles of Biochar Physicochemical Traits Mediated by Pyrolysis Conditions
文章编号: N26062504
期刊: Environmental Research
作者: Guodong Zhang, Qiyi Zheng, Lei Hua, Qinnan Dong, He Guo, Mei An, Tiecheng Wang
更新时间: 2026-06-25
摘要: Antibiotic resistance genes (ARGs), emerging contaminants spreading via horizontal gene transfer, threaten ecosystems and human health. Biochar (BC) is a widely used agricultural soil amendment, yet its effects on ARG dissemination remain controversial, likely dependent on pyrolysis conditions. This study applied wheat straw BC prepared under three distinct pyrolysis conditions, including open-flame combustion (BC-ZJ), 500°C hypoxic pyrolysis, and 500 °C anaerobic pyrolysis, to a Brassica rapa L.–soil system for exploring ARG transfer impacts and mechanisms. BC application increased plant stem/leaf total ARG relative abundance by 20.68–71.59% and selectively enriched specific subtypes. BC-ZJ enriched multidrug resistance ARGs, whereas BC-Y500 and BC-W500 dramatically elevated aminoglycoside and tetracycline ARGs, and vancomycin and sulfonamide ARGs became undetectable. BC-ZJ (rich in oxygen-containing functional groups) stimulated microbial co-metabolism and promoted ARG proliferation and translocation into plant tissues. In contrast, BC-Y500 and BC-W500 (with larger micropore volumes and stable aromatic structures) exerted dual effects: potential adsorption of partial ARGs but selective enrichment of key ARG-hosting taxa (e.g., Pseudonocardia), leading to the accumulation of aph(3')-I and tetC in plant tissues. Structural equation modeling revealed that BC exerted a direct negative effect on ARG abundance, but this was overwhelmed by positive indirect effects via enhanced soil properties and bacterial community restructuring, leading to a net increase in ARG abundance. The bacterial community emerged as the dominant driver integrating the influences of BC properties, soil conditions, and mobile genetic elements. These findings demonstrate that biochar-mediated ARG regulation balances adsorptive inhibition and microbial stimulation in a pyrolysis-dependent manner. This study provides a mechanistic basis for engineering pyrolysis-optimized BC to mitigate agricultural ARG dissemination.

855. 题目: Multi-Batch Treatment of Swine Slaughterhouse Wastewater by Microalgal–Fungal Consortium System: Stability and Effects on Dissolved Organic Matter
文章编号: N26062503
期刊: Environmental Research
作者: Zhengsheng Shi, Yequan Sheng, Xin Tan, Yu Xin, Xiaolong Wu, Qin Zhang, Yanbin Li
更新时间: 2026-06-25
摘要: Swine slaughterhouse wastewater (SSW) is highly hazardous due to its extreme organic pollution load. In this study, an efficient and stable microalgal-fungal consortium system (MFCS) was constructed with Chlorella sp. DT025 and Penicillium sp. AHP141 for the multi-batch treatment of SSW. The MFCS was employed to treat five consecutive batches of SSW, demonstrating its efficient and stable removal of organic pollutants. Specifically, the removal ratio of COD, TN, TP, NO3--N, and NO2--N reached 68.16%, 76.47%, 61.47%, 57.55%, and 33.30%, respectively. Moreover, the MFCS achieved a high lipid production of 1.54 g/L after five batches of SSW treatment. In the MFCS, the relative expression levels of Nr, Nrt, rbcL, fbp, and glgA in Chlorella sp. DT025 increased by 8.05, 2.01, 3.26, 2.05, and 2.83 folds, respectively. Furthermore, dissolved organic matter (DOM) in SSW was efficiently removed by the MFCS. The removal ratio of tyrosine-like, tryptophan-like, fulvic-like, soluble microbial by-product-like, and humic acid-like components reached 75.79%, 66.02%, 66.09%, 71.90%, and 69.50%, respectively. The fluorescence index (1.33), biological index (1.38), and humification index (0.33) of SSW treated by the MFCS all remained within normal ranges, indicating no secondary pollution to the water body. Finally, tyrosine-like compounds were found to play an important role in the wastewater treatment process by correlation analysis. These results indicated that the MFCS enables continuous and stably treatment of SSW, effectively removing DOM from the wastewater without generating secondary environmental risks.

856. 题目: Fe3O4-activated pistachio shell biochar as a magnetic support for enhanced toluene removal: performance of an immobilized biohybrid system.
文章编号: N26062502
期刊: Environmental Science and Pollution Research
作者: Lidia Gallego-Mena, Diego A Hernández-Ospina, Richard Martel, Satinder K Brar, Luz Sánchez-Silva
更新时间: 2026-06-25
摘要: Developing efficient and sustainable strategies for removing monoaromatic pollutants remains a major challenge in environmental engineering. This study evaluated a biohybrid system based on immobilising a bacterial co-culture of Microbacterium esteraromaticum and Serratia fonticola onto Fe₃O₄-activated pistachio shell biochar for aerobic toluene removal from water. The performance of free and immobilised cells was compared at initial toluene concentrations of 50 and 200 mg L⁻1. Growth assays showed strain-dependent tolerance, with M. esteraromaticum displaying the highest resistance, while the co-culture maintained stable growth across all conditions. Immobilisation on magnetically activated biochar enhanced biomass retention and biodegradation compared to free cells and nonmagnetic supports, particularly at high pollutant loads. The immobilised co-culture achieved over 90% toluene removal within 48 h at 200 mg L⁻1. These findings highlight magnetically activated agro-waste biochar as an effective and sustainable support for biohybrid systems, offering a promising approach for treating monoaromatic hydrocarbons in contaminated waters.

857. 题目: Novel porous material for efficient removal of difficult-to-separate organic matter from Lithium extraction solution
文章编号: N26062501
期刊: Separation and Purification Technology
作者: Hanya Zhang, Mingzheng Bao, Zhencan Hou, Yijian Zheng, Zhengjie Li, Jilong Han
更新时间: 2026-06-25
摘要: The swift advancement of the lithium industry has prompted a transition to utilizing lithium-rich salt lake resources as primary raw materials. In China, solvent extraction is used industrially to extract lithium from salt lakes with high magnesium-to‑lithium ratios. However, the post-stripping solution (battery grade lithium carbonate) contains approximately 750 mg/L of hardly removable organic matter, as measured by total organic carbon, which affects the quality of lithium chloride products. This paper thoroughly examines the adsorption behavior and mechanism of tributyl phosphate (TBP) using a polystyrene-based hyper-crosslinked polymer derived from waste plastics as an adsorbent. It also explores how synthesis and adsorption conditions affect the adsorption performance of TBP. The adsorption isotherm and kinetic profiles confirm that TBP sorption behavior adheres to the Freundlich isotherm model and the pseudo-second-order kinetic framework, implying a predominant chemisorption-driven mechanism with multilayer adsorption dominating on the PS-HCP-FDA-1 substrate. Spectroscopic and surface characterization studies, including infrared spectroscopy, water contact angle measurements, and X-ray photoelectron spectroscopy (XPS) analyses, collectively indicate that the adsorption of TBP onto PS-HCP-FDA-1 is predominantly governed resulting from synergistic contributions of hydrophobic interaction, hydrogen-bond formation, and weak van der Waals-type bonding. Under conditions of 25 °C, pH 7, and an adsorbent dosage of 10 mg, PS-HCP-FDA-1 exhibits a maximum adsorption capacity of 135 mg/g for TBP from a 30 mL solution with a concentration of 50 mg/L TBP and a COD value of 105 mg/L. PS-HCP-FDA-1 exhibited excellent stability, maintaining an adsorption capacity of 128 mg/g and a removal efficiency of approximately 95% after 10 adsorption-desorption regeneration cycles

858. 题目: Shelf-invading low-oxygen waters control Cenozoic organic carbon burial rates.
文章编号: N26062403
期刊: Proceedings of the National Academy of Sciences of the United States of America
作者: Rosalind E M Rickaby, Thomas J Wood, Zunli Lu, Christian J Bjerrum
更新时间: 2026-06-24
摘要: The thermostatic mechanisms of Earth's persistent habitability remain unresolved. High-resolution Cenozoic C isotope records, P accumulation, and coarse-fraction I/Ca allow recalculation and assessment of controls on the global proportion of total carbon buried as organic carbon (forg), a regulator of atmospheric CO2 and O2. forg was suppressed during the Eocene hothouse, coincident with an oxygenated water column and low water-column phosphate. With decreased sea level, the area for efficient organic carbon and phosphate sedimentary burial diminished, leading increasingly to greater water-column phosphate, higher primary productivity, and emergent water column deoxygenation. The sea-level influence on the areal extent of high sedimentation in shelf regions acts as a control on phosphate availability for new production, respiratory demand, and ocean oxygenation, as proposed by hypsographic models [C. J. Bjerrum, J. Bendtsen, J. J. F. Legarth, Geochem. Geophys. Geosys. 7, 1-24 (2006)]. During intermediate sea-level highs of the Neogene, pulses of enhanced organic carbon burial prevailed for multimillion years, in response to the redox recycling of phosphate when oxygen minimum zones with O2 < 90 µmol/kg were present. We propose the existence of a self-limiting intermediate sea-level sweet spot with peak Corg burial due to redox recycling of phosphate, whereby oxygen minimum zones (OMZ) with O2 < 90 µmol/kg impinge on the most Corg rich continental shelf sediments. Such a sweet spot has narrowed over Earth history due to deepening OMZs, stabilizing both atmospheric O2 and CO2. Continental marine inundation controls on phosphate availability, and the sedimentary carbon flux, provide a positive-feedback and rectifier to perturbations during inception of the icehouse world.

859. 题目: Low temperature pyrolysis of centralized and decentralized sewage sludges: Biochar production, per-and polyfluoroalkyl substances (PFAS) reduction and release.
文章编号: N26062402
期刊: Journal of Environmental Management
作者: Thet Lei Yee, Jenyuk Lohwacharin, Jiangyong Hu
更新时间: 2026-06-24
摘要: In the urban periphery, applying sludge from decentralized sewage treatment system to farmlands is increasingly adopted in response to demand of nutrient recovery and local crop promotion, but potential risks pertain due to persistent micropollutants. We elucidate thermal destruction of multiple per- and polyfluoroalkyl substances (PFAS) species after slow pyrolysis (∼300 °C) of real sewage sludge samples from both decentralized and centralized treatment plants to determine how low-temperature pyrolysis mitigates PFAS persistence and post-treatment release for edible crop production. Pyrolysis reduced total PFAS concentrations by up to 85%, regardless of initial sludge concentrations but strongly dependent on functional group and chain length. In both sludge types, perfluorooctanesulfonic acid (PFOS) exhibited the highest thermal stability, with reductions of only 30-68.7%. In contrast, perfluorooctanoic acid (PFOA) and other short-chain perfluoroalkyl carboxylic acids (PFCAs) declined substantially (95-96%) while long-chain PFCAs remained detectable in the resulting biochar. Leaching experiments showed greater PFAS release under acidic conditions, with PFOA consistently the most mobile compound (43-168%). Chain-length-dependent leaching trends under both acidic and basic conditions indicate that hydrophobic interaction contributes to PFAS retention on biochar. Despite differences in total PFAS burdens and composition, biochar derived from decentralized sludge exhibited leaching behavior comparable to centralized sludge, suggesting that contaminant mobility rather than bulk concentration governs environmental risk. Evaluation of leachate metal and PFAS concentrations infers that low-temperature pyrolysis alone, without further optimization, may be insufficient to ensure safe agricultural reuse.

860. 题目: Land-use gradients alter active and bulk soil carbon indicators in a coarse-textured sandstone landscape of the Pachmarhi Biosphere Reserve, India.
文章编号: N26062401
期刊: Environmental Monitoring and Assessment
作者: Tanzeel Muzaffar, Biswajit Saha
更新时间: 2026-06-24
摘要: This study identified which carbon and microbe-related indicators best captured land-use contrasts across five systems in the Pachmarhi Biosphere Reserve (PBR), Central India: agricultural land (AL), forest land (FL), grassland (GL), orchard land (OL), and urban land (UL). Microbial biomass carbon (MBC), dehydrogenase activity (DHA), microbial quotient (qMic), and physicochemical characteristics were measured in composite topsoil samples (0-15 cm) collected from each land-use system. Soil organic carbon (SOC) differed significantly among land use systems (LUSs; Kruskal-Wallis, p < 0.001). OL showed the highest SOC and the lowest UL. Additionally, MBC varied (ANOVA, p = 0.001), with FL and OL having larger active carbon pools than UL. qMic pattern was lower in UL, indicating reduced microbial allocation. Principal component 1 (PC1) separated urban soils (chemically enriched) from forest/orchard soils (higher SOC and biomass). In this landscape of coarse-textured sandstone, urban soils were distinguished by a combined shift in chemistry and microbial allocation rather than by a single dramatic carbon signal. While grasslands displayed high but uneven oxidative activity, forest and orchard soils retained larger active carbon pools. We identified the most informative indicators for detecting land-use effects.