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101. 题目: Mechanism of Antibiotic Removal from Wastewater by Choline-Based Deep Eutectic Solvents Modified Biochar
文章编号: N26040302
期刊: Water, Air, & Soil Pollution
作者: Yue Zhao, Yunze Li, Xingwang Li, Qingxin Xue, Xinyao Yang, Jing Tong
更新时间: 2026-04-03
摘要: The objective of this study was to elucidate how deep eutectic solvent (DES) modification regulates the adsorption performance of biochar toward tetracycline (TC). Five choline-based DES systems were synthesized and employed to modify alfalfa-derived biochar (BC600), enabling systematic regulation of surface chemistry and pore structure. Adsorption behavior was evaluated through kinetic, isotherm, diffusion, and thermodynamic analyses. DES modification markedly enhanced TC removal, with all modified biochar exhibiting more than a twofold increase in adsorption capacity within 2 h. Among them, choline–citric acid modified biochar achieved the highest capacity (36.87 mg g⁻1 at 293.15 K). Adsorption followed pseudo-second-order kinetics and was better described by the Langmuir model, while thermodynamic results indicated a spontaneous and endothermic process. Diffusion analysis revealed a multi-step pathway involving external mass transfer and intraparticle diffusion. These findings demonstrate that DES-mediated regulation of oxygen-containing functional groups and pore accessibility governs adsorption efficiency and pathway evolution. This work provides a mechanistic basis for designing sustainable, biomass-derived adsorbents for antibiotic-contaminated wastewater treatment.

102. 题目: Habitat-specific metabolism, dissolved organic carbon fluxes, and composition in a tropical seagrass meadow
文章编号: N26040301
期刊: Estuarine, Coastal and Shelf Science
作者: Jian-Jhih Chen, Shu-Lun Wang, Wen-Chen Chou, Ruei-Feng Shiu, Hsiao-Chun Tseng, Tzong-Yueh Chen, Mariche B Natividad
更新时间: 2026-04-03
摘要: Seagrass ecosystems are vital hotspots of coastal carbon cycling, yet their role in regulating the quantity, quality, and bioavailability of dissolved organic matter (DOM) and dissolved organic carbon (DOC) fluxes remains poorly understood, particularly in tropical regions. This study investigates the coupling between benthic metabolism, DOM composition and characteristics, and DOC fluxes in a tropical seagrass meadow and adjacent bare sediments using ex-situ incubations combined with chromophoric and fluorescent DOM analyses. Our results demonstrate that seagrass habitats had significantly higher metabolic activity than bare sediments. Specifically, seagrass habitats functioned as net autotrophic systems with a net community productivity (NCP) of 29 ± 1 mmol m-2 d-1, whereas bare sediments were net heterotrophic with an NCP of -5.8 ± 1.6 mmol m-2 d-1). Benthic DOC fluxes were also significantly greater in seagrass habitats (626 ± 123 μmol m-2 h-1) than in bare sediments (63 ± 88 μmol m-2 h-1) (p < 0.05). Optical revealed that seagrass habitats had higher chromophoric DOM and lower specific UV absorbance than bare sediments. Moreover, fluorescence DOM results suggested that seagrass-derived DOM was fresh, protein-like, and bioavailable, whereas bare sediments contributed more degraded, and recalcitrant DOM. These findings provide new insights into the biogeochemical significance of seagrass meadows, demonstrating that they function not only as carbon sinks but as critical sources of bioavailable organic matter.

103. 题目: Molecular-Microbial Cascades Regulate Organic Phosphorus Mineralization in Lake Sediments.
文章编号: N26040206
期刊: Environmental Science & Technology
作者: Hezhong Yuan, Tong Guan, Qianhui Yuan, Qingfei Zeng, Jianghua Yu, Yiwei Cai, Enfeng Liu, Qiang Li, Yu Wang
更新时间: 2026-04-02
摘要: Organic phosphorus (Po) mineralization is a major internal source of soluble reactive phosphorus (SRP) in lakes, yet the molecular and microbial mechanisms governing this transformation remain poorly understood. Here, we aim to elucidate these mechanisms by integrating excitation-emission fluorescence spectroscopy, Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS), and metagenomics across two contrasting ecological niches in Taihu Lake, namely the Cyanophyta-dominated and macrophyte-dominated regions. We also supplement our results with the findings from a global meta-analysis. We found that fulvic-associated Po (Fu-Po) dominated sedimentary Po inventories, whereas Po extracted with NaHCO3 (NaHCO3-Po) and microbial biomass Po (biomass-Po) exhibited higher decomposition potential. Fluorescence indices indicated increasing lability with depth, and humic-like materials exhibited a higher tendency to be decomposed under anoxia, accompanied by the accumulation of fulvic-like fractions. FT-ICR-MS revealed proteins and lignins as key constituents of humic-associated Po and Fu-Po, supporting their bioavailability, while NaHCO3-Po was enriched in compounds with lipid-like CHOSP formulas, suggesting greater lability. Metagenomics identified phoD as the most abundant phosphatase-encoding gene, with rare but highly connected phoD-harboring taxa emerging as potential keystone regulators alongside abundant functional groups. Across global lake sediments, alkaline phosphatase activity, Po content, and phoD abundance were found to covary positively, and structural equation modeling highlighted Fu-Po as a disproportionate indirect driver of SRP replenishment via phoD-mediated phosphatase activity. These findings reveal a mechanistic cascade linking molecular composition to phoD-mediated enzymatic potential in Po mineralization, identifying Po bioavailability, rather than inorganic phosphorus pools alone, as a critical driver for reducing internal loading. Targeting this pathway could modulate Po mineralization mechanisms in sediments worldwide, offering valuable insights into the management of lake eutrophication under accelerating nutrient pressures.

104. 题目: Development of Carbon Pools and Enzyme Activities in Constructed Urban Soils
文章编号: N26040205
期刊: European Journal of Soil Science
作者: Pasquale Napoletano, Maha Deeb, Sara Perl Egendorf, Brooke Singer, Zhongqi Cheng, Erika Di Iorio, Anna De Marco, Claudio Colombo, Peter Groffman
更新时间: 2026-04-02
摘要: Constructed soils (CSs) are important for rehabilitation of degraded lands, carbon (C) sequestration, and urban agriculture, but little is known about the development and dynamics of organic matter pools in these soils. In this study, we tracked these pools over 21 months in CSs (1/3 compost and 2/3 fine glacio‐fluvial sediments) planted with eight different vegetation treatments with densimetric and enzymatic approaches. Time was the main driver influencing soil parameters, followed by vegetation. A high diversity “All” treatment had a significant impact on soil development, notably enriching mineral/sand‐associated organic carbon (MSOC) and nitrogen (MSON) by 15% and 12%, respectively, compared to a non‐vegetated “Bare” treatment. The presence of sunflower ( Helianthus annuus L.) in the vegetation treatment was associated with low values of nitrate‐N, particulate organic N (PON), hot‐water extractable carbon (HWEC), and β‐glucosidase. These CSs appear to be undergoing rapid soil development driven by organic matter accumulation processes that facilitate nutrient cycling and accumulation of stable MSOC.

105. 题目: Strong nickel enrichment co-located with redox-organic interactions in Neretva Vallis, Mars.
文章编号: N26040204
期刊: Nature Communications
作者: H T Manelski, R C Wiens, A Broz, J A Hurowitz, M Tice, S Clegg, E Dehouck, N Randazzo, S A Connell, O Forni, S J VanBommel, S Schröder, L Mandon, T S J Gabriel, C C Bedford, R K Martinez, E A Cloutis, A Cousin, M L Cable
更新时间: 2026-04-02
摘要: In 2024, NASA's Perseverance rover explored Neretva Vallis, an ancient river channel that once transported water into Jezero crater. There, the rover encountered Mg-poor mudstones with diverse alteration features. In 32 rock targets in Neretva Vallis, nickel (Ni) was detected by the SuperCam instrument with concentrations in individual rocks as high as ~1.1 weight percent - the highest abundance ever seen in bedrock on Mars. In this work, we describe and contextualize these Ni enrichments using outcrop-scale imagery and petrographic-scale elemental maps provided by the PIXL instrument. We find Ni enrichment in Fe-sulfides and their weathering products. The geochemistry and morphology of Neretva Vallis Fe-sulfides are similar to pyrite present in terrestrial Archean and Paleoproterozoic sedimentary rocks. As an essential element for terrestrial microbial life, the proximity of Ni enrichments to reduced sulfur and organic matter adds to the interest in bringing back to Earth the rock sample collected by Perseverance at this location, which could provide key insights into complex redox chemistry on early Mars.

106. 题目: Direct Evidence from Multiscale Measurements Explains the Nonmonotonic Deposition of Microplastics in the Presence of Dissolved Organic Matter: Overlooked Contribution of Molecular Self-Assembly.
文章编号: N26040203
期刊: Environmental Science & Technology
作者: Zihan Xiao, Yu Luo, Yijun Mo, Yi Fu, Shishu Zhu, Meng Zhang, Xiaofan Yang, Chao Jin, Hongbo Zeng, Peng Wang, Rongliang Qiu
更新时间: 2026-04-02
摘要: Microplastics (MPs) pollution constitutes a critically escalating global environmental challenge. Understanding dissolved organic matter (DOM)-MPs interactions and their transport behavior in soil and aquatic systems is of fundamental significance. However, contradictory observations regarding the impact of DOM on the fate of MPs exist in the literature, hindering our understanding of their risk and ecological impacts. To date, quantitative evidence explaining how DOM self-assembly influences the transport kinetics of MPs or other emerging particulate contaminants has not been explored. Here, we employed excitation-emission matrix spectroscopy, colloidal atomic force microscopy, and microfluidic systems to systematically elucidate DOM-mediated mechanisms controlling the fate of pristine and aged MPs from molecular, nano, and interfacial scales in a coherent manner. Direct evidence demonstrated that interactions among DOM components mediated the process of self-assembly on MPs and hematite surface, resulting in nonmonotonic deposition behavior in response to an increase in DOM concentration. The pristine MPs prefer to adsorb hydrophobic DOM fractions via nonspecific interactions, whereas aged MPs undergo a triphasic DOM self-assembly process due to the variation in DOM concentration and composition through specific interactions. Consequently, their deposition fluxes on hematite vary accordingly: pristine MPs flux decreased to (49.8 ± 2.9) × 10-4 μm/min then increased to (64.0 ± 4.5) × 10-4 μm/min, whereas aged MP flux decreased to (12.4 ± 1.8) × 10-4 μm/min, subsequently increased to (22.1 ± 0.8) × 10-4 μm/min, and finally declined to (4.0 ± 2.0) × 10-4 μm/min. Critical DOM concentrations serving as the inflection point of deposition fluxes for both pristine MPs and aged MPs were identified. Overall, this study establishes a novel framework for investigating the deposition mechanisms of MPs and other particulate pollutants, highlighting the critical role of DOM self-assembly in regulating the fate of contaminants in DOM-rich environments. The observed molecular fractionation of DOM, dictated by both concentration and composition, determines its interactions with minerals, thereby regulating the subsequent stabilization and biogeochemical cycling of carbon within the earth's critical zone.

107. 题目: Unveiling in-pipe carbon-sulfur transformation and microbial function during urine transport for centralized management
文章编号: N26040202
期刊: Water Research
作者: Zhiqiang Zuo, Yaxin Xing, Longkai Qiao, Shaolin Yang, Daheng Ren, Miao Guo, Yanchen Liu, Xia Huang
更新时间: 2026-04-02
摘要: Source-separated urine collection and centralized nutrient recovery at city-scale hold great potential for advancing sustainable resource management. As the critical link between urine collection systems and nutrient recovery facilities, urine-transporting sewer systems have recently been incorporated into life cycle assessments (LCA), yet their potential for biochemical transformations has not been explored. Here, for the first time, we experimentally unveil key pollutant transformations and microbial functions in a urine-fed bioreactor (representing urine transport), with a sewage-fed bioreactor serving as a control. Major urine nutrients (N, P, and K) remained largely stable during transport, whereas organic carbon and sulfate decreased markedly. Methane production was negligible over 160 days, while sulfide production initially declined but fully recovered by day 80, accompanied by elevated microbial activity and substantial sulfide accumulation in sediments. Microbial community analyses revealed that urine exposure reduced community richness and led to a pronounced community, with methanogenic archaea strongly inhibited and sulfate-reducing bacteria (SRB) becoming dominant under prolonged urine stress. A Desulfomicrobium-like SRB species was progressively enriched (∼35% of total metagenome-assembled genomes (MAGs)) and likely responsible for the sulfide rebound. Spatial heterogeneity of microbial communities in sediments further explains depth-specific sulfide accumulation. Overall, this study provides important insights into carbon–sulfur transformations and microbial adaptation in urine transport systems, informing improved system design, operation, and further LCA.

108. 题目: Efficient adsorption of Cu(II) from wastewater via modified biochars from residues of Chinese herbal medicines Pueraria lobata and Leonurus japonicus and direct reuses for electrode materials.
文章编号: N26040201
期刊: Journal of Environmental Management
作者: Ze Zhong, Jiachen Chen, Mingliang Sun, Yuqi Li
更新时间: 2026-04-02
摘要: Chinese herbal medicine residues represent a promising feedstock for biochar production, offering significant potential for resource recycling. In this study, residues of Chinese herbal medicines Pueraria lobata and Leonurus japonicus were initially prepared into raw biochars (PL-BC and LJ-BC), which were subsequently modified using KOH (KPL-BC and KLJ-BC) for Cu(II) removal from wastewater. The results demonstrated that adsorption behaviors of both KPL-BC and KLJ-BC were well described by the pseudo-first-order model. The isotherm analysis revealed that KPL-BC followed the Freundlich model, whereas KLJ-BC was better fitted by the Langmuir model. The calculated maximum adsorption capacities of KPL-BC and KLJ-BC were 172.0 mg/g and 163.0 mg/g, respectively, representing increases of 1.8-fold and 4.6-fold compared with PL-BC and LJ-BC. Additionally, after four consecutive adsorption-desorption cycles, KPL-BC and KLJ-BC retained adsorption capacities of 69.34% and 52.84%, respectively. KOH modification significantly improved the specific surface area, oxygen-containing functional groups and structural disorder of PL-BC and LJ-BC. Mechanistic analysis revealed that KPL-BC adsorption involved both physisorption and chemisorption, whereas KLJ-BC was dominated by chemisorption. Furthermore, Cu(II)-adsorbed biochars (KPL-BC/Cu and KLJ-BC/Cu) were directly employed as electrode materials for supercapacitors. The electrochemical testing revealed that KPL-BC/Cu and KLJ-BC/Cu electrodes achieved specific capacitances of 281.5 F/g and 289.5 F/g at a current density of 0.5 A/g. In summary, the results of this study provided an efficient and environmentally friendly option for the resource utilization of Chinese herbal medicine residues of P. lobata and L. japonicus and the removal of heavy metal in wastewater.

109. 题目: Fe-Mg co-modified biochar for simultaneous retention of ammonium and phosphate in soils: Interfacial mechanisms and performance
文章编号: N26040114
期刊: Separation and Purification Technology
作者: Yifan Wang, Boyu Zhang, Shuqi Liang, Jianzhi Wang, Yixing Yu, Yuting Zhao, Junxi Tan, Yan Li, Yue Tao, Jialiang Li, Ying Zhang
更新时间: 2026-04-01
摘要: The excessive reliance on chemical fertilizers in modern agriculture results in low nitrogen and phosphorus utilization efficiency, leading to substantial nutrient loss from farmland. This study developed an iron/magnesium co-modified biochar (FMBC) designed to efficiently sequester soil nitrogen and phosphorus through synergistic chemical precipitation and ion exchange. Compared to pristine biochar, FMBC demonstrated superior simultaneous removal capabilities, achieving maximum adsorption capacities of 149.92 mg/g for NH₄⁺-N and 453.08 mg/g for P. Integrated analyses validated a chemisorption-dominated process driven primarily by Mg-induced struvite crystallization, while loaded iron oxides conferred superparamagnetic. FMBC exhibited robust performance in complex matrices and stability across a broad pH range 7–11. Furthermore, soil column experiments revealed that FMBC significantly enhanced NH₄⁺-N and P retention and mitigated P leaching. Crucially, microbiological analyses indicated that FMBC amendment restructured the soil microbial community, selectively enriching beneficial phyla such as Bacillota and Pseudomonadota, and optimizing functional genes related to nutrient metabolism. Consequently, FMBC serves as a novel dual-purpose material combining environmental remediation with slow-release fertilizer properties, offering significant value for controlling paddy tailwater pollution and realizing nutrient circularity.

110. 题目: Increased Soil Carbon and Nitrogen Stocks Associate With Stronger Calcium–Microbial and Multi‐Trophic Interactions Under Warming
文章编号: N26040113
期刊: Global Change Biology
作者: Dan Xiao, Wei Zhang, David R Johnson, Peilei Hu, Lin Xu, Mingming Sun, Li Tang, Xunyang He, Jie Zhao, Xionghui Liao, Wanxia Peng, Hongsong Chen, Kelin Wang
更新时间: 2026-04-01
摘要: Converting cropland to planted forests improves soil organic carbon (SOC) and total nitrogen (TN) storage while contributing to climate change mitigation, primarily through the regulation of belowground organisms and mineral protection such as calcium (Ca). However, the mechanistic pathways linking exchangeable Ca 2+ , soil micro‐food web interactions, and nutrient accumulation under warming remain unclear. Here, we investigated their potential roles in driving the accumulation of mineral‐associated organic matter (MAOM), SOC, and TN in planted forests compared with croplands under warming conditions. Planted forests exhibited higher MAOM, SOC, and TN than cropland and had stronger coupling between carbon and nitrogen. Warming increased MAOM, SOC, and TN in planted forests but reduced SOC in cropland. Compared to cropland, planted forests displayed elevated levels of soil exchangeable Ca 2+ , microbial necromass carbon and nitrogen, stronger Ca–microbial and multi‐trophic associations. Warming further amplified positive Ca–microbial (e.g., bacteria and fungi) and cross‐trophic associations (e.g., nematode–bacteria, nematode–fungi, nematode–protist, and omnivore‐predator–bacteria/fungi) in planted forests by increasing plant productivity, litter biomass, and soil exchangeable Ca 2+ , whereas cropland showed limited responsiveness to temperature changes. In planted forests, soil exchangeable Ca 2+ was positively correlated with Ca–microbial and cross‐trophic associations, microbial necromass carbon and nitrogen, and the contents of MAOM, SOC, and TN. These relationships were absent in cropland. Notably, cross‐trophic associations rather than microbial abundance or diversity, with significant modulation by soil exchangeable Ca 2+ , had the strongest positive relationship with MAOM, SOC, and TN accumulation in planted forests. Collectively, our findings lead to the hypothesis that warming promotes SOC and TN storage in planted forests by jointly strengthening exchangeable Ca 2+ , Ca–microbial and cross‐trophic interactions. These results highlight the potential importance of multi‐trophic interactions and Ca‐mediated processes in stabilizing microbial necromass and fostering carbon and nitrogen preservation during vegetation restoration in response to warming.

111. 题目: Interfacial mechanisms of NiCo spinel catalysts in low-temperature catalytic air oxidation of humic-rich wastewater
文章编号: N26040112
期刊: Separation and Purification Technology
作者: Qi Jing, Wenjia Huang, Huan Li
更新时间: 2026-04-01
摘要: Low-temperature catalytic air oxidation (LTCAO) under mild conditions (<100 °C, ambient pressure) is a promising remediation strategy for processing wastewater rich in humic acid (HA). Herein, NiCo spinel (NCO) catalysts with tunable Ni/Co ratios were developed. The NCO-Ni2 catalyst, featuring a codoped structure of NiO and NiCo₂O₄ spinel, achieved the highest total organic carbon (TOC) removal of 78.9% (19.5 mg-TOC/g catalyst) at 90 °C (180 min). Surface chemical analyses revealed that increasing the Ni/Co ratio induced electronic reconstruction and enhanced the formation of oxygen vacancies (Ov). The surface-bound oxidative species generated from Ov primarily contributed to the degradation of HA. Through a detailed examination of surface adsorbates during LTCAO, enhanced sustained catalytic oxidation of HA on NCO-Ni2 was confirmed. Typical coexisting components such as SO₄²⁻ promoted TOC removal to 91.3% (22.6 mg-TOC/g-catalyst) at 90 °C (180 min) by promoting interfacial oxidation, reducing the accumulation of polymer intermediates, and stabilizing the active sites. These findings provide mechanistic insights into the active site regulation and oxidation pathways of HA during LTCAO, offering a foundation for catalyst design and practical application in the advanced treatment of refractory wastewater.

112. 题目: Spray-coated antifouling membranes for mitigating extracellular polymeric substances-driven fouling in microalgae harvesting
文章编号: N26040111
期刊: Journal of Membrane Science
作者: Dreamdith P Dy, Irish Valerie Maggay, Shih-Hong Liou, Rhoda B Leron, Gian Vincent Dizon, Kristopher Ray S Pamintuan, Yu-Tzu Huang, Yung Chang, Antoine Venault
更新时间: 2026-04-01
摘要: Microalgae harvesting using membrane filtration is severely challenged by the accumulation of extracellular polymeric substances (EPS), which form highly adhesive and gel-like layers that adhere strongly to membrane surfaces, clog pores, and accelerate performance decline. Addressing this, we engineered a poly(vinylidene fluoride) (PVDF) membrane with enhanced resistance to EPS by spray-coating a random copolymer composed of butyl methacrylate (BMA) and polyethylene glycol methyl ether methacrylate (PEGMA) onto the membrane surface, resulting in a stable hydration layer that effectively minimizes foulant attachment. As a consequence, optimized membrane (C-20) exhibited a threefold reduction in BSA adsorption compared to the pristine PVDF (11.0 vs. 37.70 μg/cm²). During the filtration of microalgae-containing wastewater, it achieved a significantly higher water flux and demonstrated improved flux recovery (∼38%) over the pristine membrane (∼13%). Physico-chemical post-filtration analyses confirmed reduced EPS deposition and algal adhesion on C-20 surfaces. Importantly, long-term stability tests showed minimal copolymer leaching (1.22% ± 0.04) after four weeks of immersion in deionized water, with antifouling performance remaining intact. These findings demonstrate that the antifouling copolymer effectively limits EPS-driven fouling by establishing a hydration layer, and position spray-coating as a simple, easy, and scalable approach for advancing membrane-based microalgae harvesting.

113. 题目: Phosphorus Bioavailability in Hydrochars Derived from Different Solid Biowastes: Role of Humic Acid and Metal Species
文章编号: N26040110
期刊: ACS Sustainable Chemistry & Engineering
作者: Wei Ding, Yael Dubowski, Xuan Luo, Zichang Ma, Ling Tan, Yuyan Lin, Nan Wang, Zhiheng Luo, Fan Wang, Keke Xiao
更新时间: 2026-04-01
摘要: Hydrothermal carbonization is a promising technology for the recovery of phosphorus (P) from solid biowastes. The poor P bioavailability of hydrochar limits its application as a fertilizer. This study assessed the P bioavailability of hydrochars derived from various solid biowastes, with a focus on the role of humic acid (HA) and metal species. The results demonstrated that Ca-related P minerals predominated in pig-manure-derived hydrochar (Hy-PM). Specifically, apatite P accounted for 57.6–96.8% of total P, and HCl-extractable P represented 17.7–93.2% of total P. In contrast, Fe/Al-related P minerals were dominant in sewage-sludge-derived hydrochar (Hy-SS). Within Hy-SS, nonapatite inorganic P constituted 38.2–48.7% of total P, while NaOH-extractable P accounted for 54.7–76.7% of total P. Additionally, Hy-PM exhibited a relatively higher HA content (61.8–122.4 mg/g C) compared to Hy-SS (28.8–116.1 mg/g C) at the same temperature. P bioavailability evaluation indicated that the highest concentrations of total P (19.0 mg/g), Ca (90.3 mg/L), and HA (352.2 mg/L C) were noted in the liquid phase of the mixture after phosphate-solubilizing microorganism incubation with Hy-PM produced at 100 °C. Further kinetic studies indicated that the P–Ca–HA complex exhibited considerable stability (−8.9 to −10.5 eV) with Ca at the central core, and Ca bound preferentially with P–OH, while HA reacted preferentially with P–O. The binding affinity of HA toward Ca²⁺ (−1.1 to −2.7 eV) was higher than that toward ${\mathrm{H}\mathrm{P}\mathrm{O}}_4^{2‐}$ (−1.0 to −1.5 eV). The formation of a P–Ca–HA complex enhanced the content of bioavailable P. As such, feedstock rich in Ca (e.g., PM) and promoting HA formation are recommended to achieve high P bioavailability of hydrochar during the HTC process.

114. 题目: Co-Pyrolysis of Titanium Gypsum and Cow Dung to Prepare Modified Biochar for Phosphorus Adsorption in Water
文章编号: N26040109
期刊: Water, Air, & Soil Pollution
作者: Dongyi Li, He Li, Zhigang Liu, Kexin Xu, Pengfei Wu, Aiguo Sha, Fan Li
更新时间: 2026-04-01
摘要: To address the dual problems of waste disposal and aquatic phosphorus (P) pollution, this study prepared Titanium gypsum-Cow dung-Attapulgite tailing composite biochar (TCA) via co-pyrolysis, and modified it with NaOH to obtain Titanium gypsum—Cow dung—Attapulgite tailing—NaOH composite biochar (TCAn), systematically investigating its P adsorption performance and mechanism. Orthogonal experiment optimized TCA’s preparation conditions (mass ratio 2:2.5:1.5, 600℃) with an adsorption capacity of 26.79 mg/g, and all three preparation factors had significant effects. TCAn treated with 4 mol/L NaOH for 2 h showed an adsorption capacity of 30.94 mg/g, with heavy metal content far below national standards. Multi-characterization (SEM, BET, XRD and FTIR) revealed NaOH modification endowed TCAn with a porous structure and abundant functional groups (-OH, -COOH), and chemical adsorption was dominated by exchange, electrostatic and precipitation reactions. TCAn’s optimal adsorption conditions were 1 g/L dosage and pH = 9, and its adsorption fitted the pseudo-second-order and Langmuir models, presenting a spontaneous endothermic process. Practical tests showed TCAn’s maximum P adsorption capacity reached 55.82 mg/g, with over 85% adsorption rate in actual water, and it also had nitrogen(N) adsorption capacity. This study realizes waste resource utilization, providing an economical technical approach for water eutrophication control.

115. 题目: Experimental Investigation and Genetic Algorithm Optimization-Assisted ANN Modelling of Rhodamine B Adsorption Onto Biochar/MXene Composite
文章编号: N26040108
期刊: Water, Air, & Soil Pollution
作者: Neelaambhigai Mayilswamy, Balasubramanian Kandasubramanian, Anish Gore, Rishikesh Sonawane, Bhavana V P
更新时间: 2026-04-01
摘要: The current work accentuates the fabrication and advanced characterization of sewage sludge biochar/ MXene (SSB/MXene) composite via a solvent-free ball-milling methodology for the sustainable remediation of Rhodamine B (RhB)-laden aqueous solution. SSB/MXene adsorbent exhibited an utmost monolayered Langmuir adsorption capacity (qmax) of 14.95 mg g−1, at RhB concentrations of 15 mg L−1, with a maximum RhB removal efficacy of 99.89%. RhB batch adsorption experiments signified that dye decolorization follows pseudo-second-order kinetics, designating chemisorption, while the Langmuir adsorption isotherm confirmed homogeneous mono-layered adsorption. The RhB batch adsorption experimental results were modelled via an Artificial Neural Network (ANN) modelling-based soft computing approach employing the Levenberg–Marquardt (LM) Backpropagation Algorithm, optimized by Genetic Algorithm. The designed ANN model exemplified a strong relationship between the empirical and ANN-prognosticated adsorption capacities, ascribable to higher determination, and correlation coefficients (R2: 0.9916, R: 0.9954), as well as minimal mean square error (0.3534), mean absolute error (0.2385), and root mean square error (0.4883), demonstrating robust predictiveness towards multi-variate adsorption, thereby enabling reliable AI-driven process forecasting. This work thus establishes SSB/MXene composite as a high-performance, sustainable adsorbent, while the ANN framework imparts a scalable, data-intelligent pathway for next-generation wastewater remediation.

116. 题目: Divergent synergistic effect of arbuscular mycorrhizal fungi inoculation and biochar application on rice growth and vanadium (V) uptake in V-contaminated soil
文章编号: N26040107
期刊: Journal of Soils and Sediments
作者: Lang Qiu, Yifan Xia, Jing Yang, Yue Zhang, Chengjie Yin, Zhigang Wang, Yanxu Zhang
更新时间: 2026-04-01
摘要: Purpose The accumulation of vanadium (V) in rice grains can negatively affect agricultural product safety and human health through the food chain. Arbuscular mycorrhizal fungi (AMF) and biochar play critical roles in driving soil nutrient cycling processes and improving plant resistance to heavy metal stress, but there have been few studies regarding their synergistic effects on V contaminated soil. The synergistic effects of AMF inoculation and biochar application on rice growth and V uptake in V-contaminated paddies were investigated. Materials and methods A pot experiment was conducted to investigate the mycorrhizal characteristics, rice growth, phosphorus (P) and V acquisition and soil chemical speciation of V associated with the control (CK), solo arbuscular mycorrhizal fungus inoculation (AM), solo biochar application (B), and their combination (BAM) at applications of 0 and 500 mg NaVO3 per kg of sterilized soil. The tested AMF inoculum, Funneliformis mosseae BGC XJ01 was used for the experiment. Results and discussion V-contaminated soil significantly decreased root mycorrhizal colonization by 20.0%-34.1% and rice biomass by 2.4%-32.9% compared to the V-free soil, but it significantly increased the rice tissue V concentration. Under V stress, the three treatments of AM, B, and BAM had a positive effect on the increased rice tissue P concentration and decreased rice tissue V concentration, as well as on the rhizosphere soil available V concentration, which could alleviate the growth inhibition of rice. Further analysis of chemical V speciation in soil demonstrated that BAM treatment could convert a larger amount of the acid-soluble V fraction to reducible, oxidizable and residual V fractions through improving soil pH and the possible chelation of AMF secretions. Notably, factors of AMF inoculation and biochar application interacted for the P and V concentrations of rice shoot and root, as well as the soil acid-soluble V concentration and pH. Improvements in rice growth were more evident for BAM treatment compared to solo AMF inoculation or biochar application treatment. Conclusions Combination of AMF inoculation and biochar application contributed to promoting rice growth by 28.9%-37.9% and decreasing rice tissue V concentration by 39.3%-89.0% than the control in 500 mg kg− 1 V spiked soil, due to soil V immobilization by inducing soil alkalinization and the possible AMF secretions’ chelating. These results provide insights into V biogeochemical behavior in a soil–rice system and demonstrate that combining AMF inoculation and biochar application could be a promising strategy for the bioremediation of V-contaminated soil in the future.

117. 题目: Stevia residue and biochar reduce methane emissions from paddy soils by enhancing carbon stability and regulating methane-cycling microbes
文章编号: N26040106
期刊: Plant and Soil
作者: Zeen Wang, Tongtong Chen, Shijie Liu, Bing Huang, Hong Deng
更新时间: 2026-04-01
摘要: Background and aim Rice paddy soils represent a significant source of global methane emissions. In recent years, various soil amendments have been found to have the potential to reduce methane emissions. The effects and mechanisms of stevia residue on carbon sequestration and methane emissions in paddy soils remain unclear. Method A pot experiment used biochar (BC) as a positive control to assess the effect of stevia residue (VK) on methane emissions from paddy soil. We then measured changes in soil properties, physical fractions of soil organic carbon and soil aggregate stability indices, methane-cycling microbial community compositions, and CH4 emissions, and thus the mechanisms through which stevia residue influences methane emissions from rice paddy soil were revealed. Results VK and BC significantly improved soil aggregate stability and organic carbon fraction stability, thereby reducing methane emissions from paddy soils. VK further influenced the microbial environment by increasing available nutrients and belowground biomass while lowering soil pH. Both treatments enhanced the abundance of methanotrophs and suppressed methanogens, with distinct shifts in microbial community composition. Conclusions This study demonstrates that stevia residue functions as a dual-purpose amendment, simultaneously reducing CH₄ emissions from paddy soils and enhancing carbon sequestration. It provides a sustainable strategy to integrate soil fertility improvement with greenhouse gas mitigation in intensive rice agriculture.

118. 题目: Potential of Biochar and Magnetic Biochar Generated from Grapevine Pruning Residue to Immobilize Cu(II) in the Vineyard Soil
文章编号: N26040105
期刊: Water, Air, & Soil Pollution
作者: Nhung Thi Ha Pham, Manh Luong Tuan Dang, Truong Viet Nguyen
更新时间: 2026-04-01
摘要: No previous studies focus on immobilizing Cu(II) in soil resulting from the long-term use of cupric fungicides, using biochar (BC) and Fe3O4 magnetic biochar (MBC) derived from grapevine pruning residue, which can support Zero Waste strategies in vineyards. Therefore, we aim to assess the impact of the production conditions on material properties and to clarify the mechanisms of Cu(II) adsorption onto BC, MBC, and soil. Results indicate that as the pyrolysis temperature increases, there is a noticeable rise in aromatization and a more defined structure in the pristine biochar. Meanwhile, MBC exhibits a more heterogeneous structure with the successful synthesis. Compared to the original soil, soil amended with BC and MBC shows significantly higher Cu(II) adsorption and lower EDTA-extractable Cu. The nonlinearized adsorption regression presents a good fit of all experimental data to Langmuir and Freundlich models, which involves both monolayer and multilayer mechanisms. Although showing a slightly lower effective fit with both models (0.90 < R2 < 0.96), MBCs demonstrate characteristics of both monolayer and multilayer adsorption. This confirms that MBCs have more active binding sites (carboxylates, hydroxyls, and Fe–O bonds), enhancing the Cu(II) adsorption compared to other studied adsorbents. Accordingly, MBC produced at 600 °C achieves the maximum adsorption capacity (36.68 mg/g) and the strongest Freundlich constant (KF = 8.06). Overall, this study reveals significant potential of the studied BC and MBC for Cu(II) immobilization in soil and Cu(II) adsorption in liquid phase. Therefore, these materials are suitable for further research on their application in soil and water Cu-pollution treatment under field conditions.

119. 题目: Feedstock-dependent methane emissions from kitchen-waste hydrochar are mediated by dissolved organic matter composition in paddy soil.
文章编号: N26040104
期刊: Journal of Environmental Management
作者: Yongji Xu, Lisha Wang, Jinfeng Ma, Yang Ji, Yanfang Feng
更新时间: 2026-04-01
摘要: Converting kitchen waste (KW) into hydrochar is an effective strategy for resource recovery, yet its impact on greenhouse gas emissions after soil application is not well understood. This study evaluated how hydrochars derived from different KW feedstocks affect methane (CH4) emissions in paddy soil and determined the primary factors driving these changes. In a rice soil column experiment spanning the full growing season, we compared a chemical fertilizer control (CKU) with hydrochars produced from protein (PT), cellulose (CL), skeleton (SK), and starch (ST) feedstocks at two application rates (0.5% and 1% by mass). Compared with CKU, cumulative CH4 emissions increased significantly under SK and PT treatments, followed by CL, whereas ST hydrochar caused no significant change. Higher application rates consistently amplified these effects. Changes in soil dissolved organic matter (DOM) composition explained the observed CH4 emission patterns. Hydrochars from SK, PT, and CL feedstocks supplied abundant labile carbon and reduced DOM humification and stability, as indicated by lower humification index (HIX) and Ph/Pp values, thereby enhancing substrate availability for methanogenesis. In addition, SK hydrochar released high NH4+-N in paddy soil, potentially inhibiting CH4 oxidation. This dual effect resulted in the highest mcrA/pmoA ratio and net CH4 emissions under the SK treatment. These findings demonstrate that hydrochars effects on CH4 emissions were strongly governed by physicochemical heterogeneity of the feedstocks and feedstock-driven alterations in the soil organic matter and microbial activity after application rather than the technology itself. Incorporating feedstock-specific considerations into application strategies may reconcile kitchen waste recycling with CH4 mitigation in paddy agroecosystems.

120. 题目: Consistent topsoil carbon density and driving factors in urban greenspaces and natural ecosystems
文章编号: N26040103
期刊: Plant and Soil
作者: Beatriz Jiménez-Prieto, Pablo García-Palacios, Carmen Lorenzo-Rodríguez, Elena Aguilar-Santana, Josu G Alday, Camelia Algora, Cristian Carrillo-Guzmán, Cristina Armas, Felipe Bastida, Leonor Calvo, María D Carmona-Yáñez, Axel Campos-Castro, Nuria Casado-Coy, Giada Centenaro, Sonia Chamizo, Joana Costa, Svetlana Dashevskaya, Jorge Durán, María J Fernández-Alonso, Daniela Figueira, Eva Garcia, Enrique G de la Riva, Ana López-Velasco, Manuel E Lucas-Borja, Santiago Martín-Bravo, Ivan Prieto, Jesús Pérez-López, Pedro A Plaza-Alvárez, Alexandra Rodríguez, Tadeo Sáez-Sandino, Carlos Sanz-Lazaro, Santiago Soliveres, Aurora Torres, Carlos Urueta-Urueta, Manuel Delgado-Baquerizo, María Leo
更新时间: 2026-04-01
摘要: Background Urban greenspaces have the potential to mitigate urban carbon footprints by storing soil organic carbon (SOC). Different management and plant communities associated with different types of urban greenspaces may hold contrasting SOC, as well as different proportions of particulate (POC) and mineral-associated organic carbon (MAOC). In addition, management could outweigh the effects of climate or soil properties as drivers of urban SOC storage, in contrast with natural environments. Methods We analyzed SOC, POC and MAOC densities (kg m −2 ) in topsoil (0-10 cm) across 27 cities in the Iberian Peninsula with contrasting climatic and edaphic conditions. At each city, we compared four types of urban greenspaces (golf courses, roundabouts, urban farms, and parks) with a nearby natural ecosystem. Results Results revealed that, despite large differences in their typology, contrasting urban greenspaces stored comparable topsoil SOC and MAOC densities to natural ecosystems. Golf courses and urban farms also showed similar POC density to natural ecosystems, whereas parks and roundabouts had lower amounts of this carbon fraction. Consistent with global natural patterns, MAOC dominated over POC in the topsoil, and both carbon fractions showed an inverse correlation with mean annual temperature. While MAOC exhibited saturation at higher SOC levels, POC steadily increased. Conclusion Although urban greenspaces are usually neglected in global soil carbon assessments, our study shows that, compared to natural ecosystems (median: 2.42 kg m −2 ; interquartile range: 1.77), these areas store an equally important density of carbon in the topsoil (median: 2.26 kg m −2 ; interquartile range: 1.30), and this carbon exhibits similar fraction dominance, temperature influence, and saturation across large spatial gradients.