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181. 题目: Electro-trapping uranium(VI) by ternary phosphate-functionalized polymer / molybdenum disulfide / pod shell-derived biochar composite electrode
文章编号: N26032510
期刊: Journal of Environmental Management
作者: Dongqing Huang, Yun Wang, Yang Wang, Qidong Ye, Yang Li, Hao Jiang, Yanjun Du, Yan Liu, Dingzhong Yuan, Xianping Luo
更新时间: 2026-03-25
摘要: The efficient separation and subsequent recovery of uranium from radioactive effluents plays a vital role in safeguarding ecosystems and supporting the long-term viability of nuclear power technologies. Electrosorption is noteworthy for its energy efficiency and environmental compatibility. A novel phosphate-functionalized porous organic polymer/molybdenum disulfide/biochar (PC/MoS2-PPN) composite electrode was synthesized by the carbonization from pod shell, hydrothermal growth of molybdenum disulfide (MoS2) and the subsequent introduction of phosphorylated polymer for enhanced U(VI) electrosorption. The resulting PC/MoS2-PPN electrode exhibited a significantly improved specific capacitance (39.19 F/g) and low charge transfer resistance (1.4 Ω). Under optimal conditions (pH = 4.5, applied voltage = 1.2 V), the electrode demonstrated significant electrosorption capacity (407.64 mg/g), far surpassing that of the non-functionalized PC/MoS2 (147.15 mg/g). The electrosorption process followed the Langmuir model and pseudo-second-order model, and the removal efficiency remained at 86.27% after five cycles. The efficient U(VI) electro-trapping by PC/MoS2-PPN electrode was attributed not only to the formation of the bilayer, but also to the complexation of P-O/P=O groups and sulfur vacancies on the PC/MoS2-PPN electrode. This work presents an innovative and scalable pathway for electrochemically eliminating U(VI) from wastewater.
182. 题目: Biochar mediated microbial responses to organic contaminants in soil environments: From mechanisms to ecological implications
文章编号: N26032509
期刊: Applied Soil Ecology
作者: Hao Zhu, Sami Ullah, Yuting Xu, Muhammad Salam, Silvia Celletti, Nadeem Iqbal, Muhammad Mohsin Raza, Babar Hussain, Palanisamy Vasudhevan
更新时间: 2026-03-25
摘要: The rapid expansion of agricultural and industrial activities has intensified the accumulation of organic pollutants in soils, posing a significant threat to soil ecosystem integrity and its functions. These pollutants disrupt microbial community composition, reduce diversity, suppress enzymatic activity, and impair the metabolic and genetic functions critical for nutrient cycling. Biochar, a carbon-rich amendment derived from biomass pyrolysis, has great potential to mitigate these adverse effects. Its high surface area, porosity, and reactive surface groups enable strong contaminant adsorption, reduced bioavailability, and improved soil structure and aeration. Biochar promotes microbial recovery by enhancing diversity, restoring enzyme activity, and stimulating beneficial microbial functions associated with carbon and nitrogen cycling. Furthermore, biochar facilitates the biodegradation of organic contaminants, lowers pollutant uptake by plants, and supports overall soil fertility and crop productivity. This review highlights the mechanistic understanding of biochar–microbe–contaminant interactions, emphasizing adsorption, electrostatic attraction, hydrogen bonding, and pore-filling processes in biochar-amended microbial systems. This study also explored the ecological significance of biochar application in restoring microbial health and improving soil ecosystem stability. This review aims to provide an integrated perspective on how biochar mediates microbial responses to organic contaminants and to identify future directions for sustainable soil remediation practices.
183. 题目: Valorization of Chicken Manure into Biochar and Compost for Acidic Soil Amendment and Lettuce Productivity
文章编号: N26032508
期刊: Environmental Technology & Innovation
作者: Rawintra Eamrat, Tatchai Pussayanavin, Achara Taweesan, Chayanid Witthayaphirom, Somporn Tanatvanit, Donyaporn Panswad, Prajak Sastaravet, Krailak Fakkaew
更新时间: 2026-03-25
摘要: The sustainable management of agricultural waste has become a global priority, particularly in regions where livestock manure poses both environmental challenges and resource opportunities. This study examines the physicochemical properties and agronomic performance of chicken manure-derived biochar as a soil amendment for acidic soils, using Lactuca sativa (Green Oak Lettuce) as a model crop. Chicken manure (CM) was converted into biochar through slow pyrolysis at approximately 500 °C. Comprehensive characterization of CM and chicken manure biochar (CMB) was performed using XRD, FTIR, SEM-EDS, and BET surface area analysis. Compared to raw chicken manure, CMB exhibited markedly higher alkalinity, porosity, and nutrient retention, along with elevated levels of potassium and phosphorus. A greenhouse experiment was conducted to assess the effects of chicken manure biochar, compost, and their combinations on soil properties and plant growth. Among the five treatment conditions, the application of a 20% combination produced the most significant improvements in both soil properties and plant performance, without causing adverse effects related to excessive salinity, pH, and heavy metals. The measured concentrations were within the reference threshold values commonly applied to agricultural amendments. Under the conditions of this short-term study, no exceedance of guideline limits was observed. The findings confirm that an optimized biochar application can effectively ameliorate acidic soils and enhance vegetable crop productivity, thereby supporting the sustainable valorization of chicken manure waste through biochar production.
184. 题目: Trade-off between adsorption capacity and binding strength regulates carbon stabilization in mineral-associated organic matter
文章编号: N26032507
期刊: Soil Biology and Biochemistry
作者: Rongwei Sun, Yukiko Abe, Mariko Atarashi-Andoh, Jun Koarashi
更新时间: 2026-03-25
摘要: The role of minerals in soil carbon sequestration has been increasingly recognized. However, the mechanism by which mineral-associated organic matter (MAOM) resists microbial decomposition remains an open question. We prepared MAOM on amorphous allophane and crystalline kaolinite with different organic matter (OM) proxies, characterized the affinity strength of these associations using isothermal titration calorimetry and X-ray photoelectron spectroscopy, and quantified their microbial mineralization through aerobic incubation. We found that amorphous allophane displayed greater OM adsorption capacity due to its higher specific surface area; in contrast, crystalline kaolinite exhibited stronger binding with OM, consistent with its predominant inner-sphere complexation (at room temperature, without pH adjustment, and across a wide OM concentration range). Furthermore, lower MAOM mineralization was found corresponding to higher Langmuir affinity. This inverse relationship was more pronounced than the correlation with the amount of OM adsorbed by minerals. These findings suggest that the overall MAOM stability is controlled by a balance between binding strength and adsorption capacity. Namely, stronger binding affinity enhances microbial resistance of MAOM, while the abundance of mineral sites determines the amount of MAOM accessible for microbial decomposition. Mineralization is microbially mediated, but because the microbial inoculum was identical across all incubation conditions, we attribute the observed differences in MAOM mineralization to mineral-controlled OM accessibility. This study presents a novel mechanistic understanding of the MAOM dynamics and refines the prevailing perspective on MAOM persistence.
185. 题目: Soil Organic Carbon Sequestration Potential and Constraints in Arid Farmland Under Climate Change: Evaluation Based on an Optimized Process-Based Model
文章编号: N26032506
期刊: Environmental Research
作者: Shilong Ma, Xinhui Wang, Hong Wang, Xu Ma, Qishuai Ren, Erfen Yuan, Xiaoning Zhai
更新时间: 2026-03-25
摘要: Agricultural soils are major global carbon repositories and exhibit considerable potential for soil organic carbon (SOC) sequestration. However, slight climatic variations in these soils can induce significant greenhouse gas emissions. Arid and semi-arid farmlands are especially prone to such impacts within agricultural landscapes due to extreme climatic conditions and minimal organic matter contributions. Nevertheless, the dynamics of SOC reserves and their potential for sequestration under shifting climatic regimes in these drylands remains insufficiently elucidated. In this study, the RothC carbon turnover model was calibrated to simulate the spatiotemporal trajectories of SOC stocks from 2000 to 2020 under farmland expansion conditions. The analysis further assessed the potential for SOC sequestration potential under three climate change scenarios and sustainable soil-management (SSM) practices. Key constraints to SOC sequestration potential were identified, and the practical challenges confronting agricultural production in China’s arid regions were examined in the context of achieving national carbon neutrality goals by 2060. The analysis reveals the mean SOC decreased from 24.14 Mg C/ha in 2000 to 22.70 Mg C/ha in 2020. The overall SOC stock increased by merely 0.49 Tg despite the cropland expansion of 2,541,900 ha. Under the combined influences of the SSP5-5.8 climate scenario and SSM practices, the projected SOC sequestration potential during 2021–2060, relative to 2020, averaged -0.263, -0.2617, -0.2601, and -0.2569 Mg C/ha /yr, corresponding to scenarios of carbon input being Business-as-usual (BAU) and 5%, 10%, and 20% increases, respectively. Under the SSP1-1.9 and SSP2-4.5 climate scenarios, the potential for SOC sequestration increased. However, this did not translate into net SOC sequestration potential under the assumed 20% carbon input scenario. This finding suggests that in arid agricultural areas, the role of soil organic carbon management may be more about mitigating carbon loss than achieving net carbon gains. Nevertheless, agricultural soils in Xinjiang retain significant sequestration capacity, with SOC saturation ratios remaining below 0.5 across the region and displaying pronounced spatial patterns. By 2060, under the SSP5-5.8 scenario, maintaining a “4‰” (4 per 1000) SOC stock level will require 60% carbon input. Even under the SSP1-1.9 scenario, 25% input will still be necessary. Temperature and precipitation are the primary drivers of this outcome. On average, temperature, precipitation, and carbon input contribute 49%, 37%, and 14% respectively to SOC sequestration potential. In localized areas, the contribution of the carbon input factor increases. These findings significantly enhance the understanding of SOC dynamics and sequestration potential in arid and semi-arid agroecosystems under prospective climate scenarios and offer empirical evidence to inform regional policy formulation.
186. 题目: Magnetic biochar combined with digestate bioaugmentation synergistically accelerates the recovery of a collapsed anaerobic digestion system
文章编号: N26032505
期刊: Chemical Engineering Journal
作者: Bao-Shan Xing, Yong-Ning Feng, Jia-Yi Liu, Yi Zhang, Guangyin Zhen, Samir Ibrahim Gadow, Rong Chen, Xiaochang C Wang, Yu-You Li
更新时间: 2026-03-25
摘要: Rapid recovery from collapse caused by organic overloading remains a major challenge in anaerobic digestion. In this study, the synergistic effects of magnetic biochar and discharged digestate on the recovery and enhancement of the performance of two collapsed codigestion (AcoD) anaerobic dynamic membrane bioreactor (DMBR) systems for the treatment of waste-activated sludge and food waste were evaluated. The results revealed that the collapsed DMBR recovered within 12 days after the addition of both magnetic biochar and the discharged digestate. Following recovery, the methane yields increased by 17.4% (nylon-DMBR, Rn) and 3.8% (carbon cloth DMBR, Rc) relative to those of the system operating at the same organic loading rate (20.13 ± 1.06 g COD/L/d) without acidification. Analyses of sludge properties and microbial communities indicated that magnetic biochar not only enhanced sludge conductivity and electron transfer activity but also enriched the system with microorganisms associated with direct interspecific electron transfer (DIET), including Methanosarcina and Geobacter, resulting in rapid recovery and improved methanogenic capacity in collapsed high-rate AcoD systems. Compared with the DMBR with nonconductive nylon serving as the DM module, the parallel DMBR with carbon cloth serving as the DM module exhibited faster and more stable methane production characteristics under the same recovery conditions. The synergistic promotion of carbon cloth and magnetic biochar increased the sludge conductivity, the abundance of Methanosarcina, and the expression levels of c-type cytochrome genes, thereby promoting DIET activity. Therefore, coupling magnetic biochar addition with discharged digestate bioaugmentation enables rapid recovery of collapsed AcoD DMBR systems to high-rate operation, providing a practical and cost-effective strategy for restoring collapsed anaerobic digestion systems.
187. 题目: Microbial regulation of the molecular succession of dissolved organic matter in paddy soils across rice phenological stages
文章编号: N26032504
期刊: Applied Soil Ecology
作者: Xueying Feng, Xiaomin Wang, Meng Wu, Xiaofang Ma, Linhao Liang, Yumeng Zhang, Xiaoyuan Yan, Jun Shan
更新时间: 2026-03-25
摘要: Dissolved organic matter (DOM) plays a critical role in soil carbon cycling, yet its molecular dynamics and the associated microbial mechanisms in paddy fields remain poorly understood. Here, we combined FT-ICR MS, 16S rRNA sequencing, and metatranscriptomics across rice phenological stages (seedling, tillering, heading, maturity, and harvest) to trace DOM molecular succession and reveal directional couplings between microbial activity and DOM transformation. Our results revealed stage-dependent shifts in DOM composition, with labile and oxygen-rich compounds prevailing during early rice growth, followed by the accumulation in later stages. A total of 38,420 potential transformations were detected across rice phenological stages, over 55% of which were thermodynamically limited processes, indicating that DOM succession was predominantly influenced by microbial regulation. Changes in DOM molecular composition coincided with shifts in microbial community structure, with the relative abundance of core taxa such as Thermoleophilia and Actinobacteria co-varying across rice phenological stages. Granger causality analysis suggested a directional shift from labile compounds toward aromatic and stable forms. Metatranscriptomics further showed that early expression of energy- and amino acid metabolism facilitated turnover of labile DOM, while later enrichment of lipid metabolism and auxiliary activities supported the processing of complex substrates. Together, these findings highlight stage-dependent associations between microbial dynamics and DOM molecular succession in paddy soils, providing mechanistic insights into how microbial activity influences DOM transformation processes with implications for soil carbon persistence in agroecosystems.
188. 题目: The regulation mechanism of rainfall kinetic energy on inter-rill erosion and organic carbon fractions loss—A field monitoring study
文章编号: N26032503
期刊: Catena
作者: Xuantian Li, Shuqi Li, Jia Yang, Nan Shen, Mingyi Yang, Fengbao Zhang
更新时间: 2026-03-25
摘要: Soil erosion, particularly inter-rill erosion, plays a critical role in the redistribution of soil organic carbon (SOC) and its associated fractions. However, the effects of rainfall kinetic energy (KE) on the dynamics of sediment and organic carbon loss remain poorly understood. This study investigates the influence of varying rainfall KE on sediment yield, runoff, particle size distribution (PSD), and SOC fraction loss during inter-rill erosion. To address these questions, micro-plots covered with iron mesh screens of varying apertures (1, 2.5, 5, 10, and 20 mm) were established to modulate rainfall KE, with a bare plot serving as the control. The objectives were to quantify the variations in sediment and SOC fractions in response to different rainfall KE levels, examine the relationships between rainfall KE and erosion parameters, and explore the mechanisms behind SOC fraction loss during erosion. The results indicated that increasing rainfall KE enhanced sediment and runoff yields, as well as sediment concentration, with a clear relationship between rainfall intensity, duration, and KE. PSD analysis revealed that the proportion of clay and silt initially decreased with increasing KE but later increased under higher KE, suggesting selective transport of fine particles as aggregates. Notably, SOC losses, including particulate organic carbon (POC) and mineral-associated organic carbon (MOC), decreased by 48.57% to 71.14% and 49.79% to 75.59%, respectively, compared to the control plot. MOC, the dominant fraction within SOC, was impacted by KE, both in terms of content and loss. Structural equation modeling (SEM) revealed that the loss of SOC fractions was primarily mediated by sediment yield, which was indirectly influenced by rainfall KE. Our findings highlight the complex interplay between rainfall KE, sediment dynamics, and SOC fraction transport during inter-rill erosion. This study contributes novel insights into the role of rainfall KE in shaping organic carbon distribution and provides a deeper understanding of erosion-induced carbon fluxes in the context of global carbon cycling.
189. 题目: Unraveling the competitive interactions of humic and fulvic acids on galena weathering and intermittent Pb release in forest soils
文章编号: N26032502
期刊: Journal of Hazardous Materials
作者: Gerardo A Anguiano-Vega, Hugo Ramírez-Aldaba, Patricia Ponce-Peña, Roberto Briones-Gallardo, Antonio Aragón-Piña, Fabiola S Sosa-Rodríguez, Jorge Vázquez-Arenas, Israel Labastida, Ma. Azucena González-Lozano, Iván A Reyes-Dominguez, René H Lara
更新时间: 2026-03-25
摘要: Experimental evidence regarding the influence of natural organic matter on galena (PbS) weathering remains limited, particularly under the complex conditions of forest soils. This study investigates the differentiated effects of humic (HA) and fulvic acids (FA), and their mixtures, on galena oxidation and Pb mobility. Using mini-cell weathering devices over a 10-week leaching period, pristine galena was exposed to forest soil leachates (SL) and synthetic solutions of HA and FA or their asymmetric mixture. Electrochemical set-up (CV, CA, Tafel plots, EIS), were integrated with surface analyses (AFM, SEM-EDS, Zeta-potential (ζ) and Raman spectroscopy) to resolve oxidation mechanisms. Results reveal that FA promotes significantly faster oxidation and higher Pb solubility compared to HA. Oxidation kinetics were determined to be 8.33 × 10⁻⁶ mol·s⁻¹ in the HA system and 1.26 × 10⁻⁵ mol·s⁻¹ in the FA system, indicating a rate approximately one order of magnitude higher in FA than in HA. While HA promotes stronger surface passivation through the formation of HA-rich coatings and submicrometric PbOx-like phases, FA sustains intermittent Pb release due to its high solubility and strong complexation capacity over a wide pH range. In mixed systems, HA exhibits dominant control over the dissolution–passivation sequence. These findings provide important insights into the resilience of forest ecosystems affected by mining activities and offer a robust framework for quantifying Pb fate and release rates, which are critical for ecotoxicological risk assessment and sustainable forest management.
190. 题目: Metal-modified nitrogen self-doped biochar as an electrode plate for electrocatalytic removal of methylene blue
文章编号: N26032501
期刊: Journal of Environmental Management
作者: Guanbiao Ruan, Yuehong Yang, Junya Wang, Gaoyuan Qin, Xiaoling Peng, Daozhao Lin
更新时间: 2026-03-25
摘要: Iron-modified nitrogen-self-doped biochar was synthesized from cyanobacteria as electrode materials for the electrocatalytic degradation of methylene blue (MB). Cyanobacteria-based biochar was prepared via pyrolysis at 300–700 °C, and iron loading was performed to obtain composite electrodes (BEP300–BEP700), which were characterized by multiple analytical techniques. Systematic investigation of key parameters affecting MB degradation showed that acid-treated FeBEP500 (pyrolyzed at 500 °C) achieved a maximum degradation efficiency of 99.65% within 45 min under optimal conditions (initial pH = 3, catalyst dosage = 0.1 g, MB concentration = 100 mg/L, applied voltage = 9 V). Quenching experiments revealed that cyanobacteria provided carbon for the biochar framework and nitrogen to facilitate the Fe2+/Fe3+ redox cycle in Fenton-like reactions. FeBEP500 exhibited excellent recyclability via magnetic separation, retaining over 93% MB removal efficiency after five cycles and calcination regeneration, thus showing great potential for the electrocatalytic removal of aqueous organic pollutant.
191. 题目: Double Network Hydrogel–Biochar Composites with Enhanced Water Absorption and Salinity Tolerance for Sustainable Agriculture
文章编号: N26032411
期刊: Journal of Environmental Chemical Engineering
作者: Dzureen Julaihi, Cindy Soo Yun Tan, Lin-Chi Wang, Mohamad Izzat Arif Nordin, Kavirajaa Pandian Sambasevam, Suk-Fun Chin, Fui Kiew Liew, Su Shiung Lam, Peter Nai Yuh Yek, Margaret Abat, Nazrizawati Ahmad Tajuddin
更新时间: 2026-03-24
摘要: Inefficient irrigation practices in conventional irrigated agriculture contribute significantly to water scarcity, resource wastage and declining soil health. Coupled with accelerating climate change and urbanization, these challenges highlight the urgent need for innovative water retention agents (WRAs) that can boost water absorbency and promote water-use efficiency for sustainable agriculture. Novel double network hydrogel-biochar composites (DNHBCSx) were synthesized by employing a facile one-pot method, integrating covalently-crosslinked potassium poly(acrylate-co-acrylamide) (P(AA-co-AM)), dynamically-crosslinked poly(vinyl alcohol) (PVA) and palm kernel shell biochar (BC). Three key reactants, namely methylene bisacrylamide crosslinker (MBA), PVA and BC loadings, were optimized for equilibrium water absorption (EW) using Response Surface Methodology-Central Composite Design (RSM-CCD) under deionized (DI) water and saline (0.9% w/v NaCl) conditions. The ANOVA confirmed the relevance of the quadratic polynomial model (p<0.05), revealing PVA, BC and MBA-PVA interaction as dominant factors affecting EW. The optimized formulation, DNHBCS6 exhibited EW of 321.46 g/g in DI water, 34.59 g/g in 0.9% w/v NaCl and 40.94 g/g in 0.9% w/v KCl. The BC-reinforced double network structure imparted controlled swelling behaviour, pH responsiveness, salt-responsive reversible swelling and resistance to cyclic structural fatigue while retaining high water absorbency (EW ≥220 g/g). Soil application tests showed increased water holding capacity in sandy loam from 81.47% to 121.47% and retained 29.33% moisture by DNHBCS6 after 21 days, confirming its effectiveness in coarse-textured soils. Achieving a balanced synergy of EW, structural durability and saline tolerance, DNHBCS6 emerges as a robust WRA for agricultural water-use efficiency, particularly in drought-prone and saline-affected regions.
192. 题目: One-Step Fe-Doped Cyanobacterial Biochar: 4-Nitrophenol Reduction Boosted by Synergistic Adsorption and Redox Cycling
文章编号: N26032410
期刊: Journal of Environmental Chemical Engineering
作者: Jin-Xing Zheng, Min-Hua Cui, Yan Zhang, Jing Wu, He Liu, Zhi-Yong Zheng
更新时间: 2026-03-24
摘要: Nitrophenols are toxic and recalcitrant organic pollutants, posing a major challenge for wastewater treatment. Herein, a Fe-doped cyanobacterial biochar catalyst (Fe3/C1-800) was fabricated via a one-step impregnation pyrolysis strategy using lake-harvested cyanobacterial biomass as the carbon matrix and FeCl3∙6H2O as both the in-situ activator and Fe source 
realizing the 'waste-to-treat-waste' concept. When applied to the catalytic reduction of 4-nitrophenol (4-NP), the Fe3/C1-800/NaBH4 system achieved nearly complete reduction of 4-NP within 5 min, with a high turnover frequency (TOF) of 0.67 mmol·g-1·min-1, surpassing most reported transition-metal catalysts and approaching noble-metal activity. The catalyst exhibited high efficiency over a wide pH range (3-11) and temperature range (15-45 ℃), resisted interference from Cl- and NO3-, and retain 93.7% of its activity after four consecutive cycles. In real water matrices (Lake Taihu water and secondary effluent from a sewage treatment plant), the 4-NP removal efficiency reached 95.4% and 88.1%, respectively. Mechanistic investigations revealed a synergistic effect between the catalyst’s large specific surface area (802.16 m2·g-1) for 4-NP adsorption and the Fe2+/Fe3+ redox cycle for accelerated electron transfer. This synergy promotes BH₄⁻ dissociation to generate active hydrogen species, enabling the selective reduction of 4-NP to 4-aminophenol (4-AP) with 97% selectivity. Furthermore, Fe3/C1-800 displayed broad-spectrum catalytic activity toward diverse nitrophenol contaminants (e.g., o-nitrophenol, p-nitrotoluene) with conversion rates >90%. This work not only offers a low-cost, eco-friendly pathway for cyanobacterial valorization but also offers a novel design principle of high-performance biochar-based catalysts, advancing the development of sustainable reduction systems for refractory organic wastewater.
193. 题目: PAA-regulated oxygen-centered persistent free radicals on sludge biochar facilitate citric acid-assisted activation of dissolved oxygen for efficient DBP degradation
文章编号: N26032409
期刊: Separation and Purification Technology
作者: Haifeng Wen, Yuanyuan Pei, Qingwen Xu, Ziyang Wang, Suyun Xu, Zhehao Li, Lin Gu
更新时间: 2026-03-24
摘要: Recycling sewage sludge into high-valued biochar-catalysts is a promising way to utilize the by-product that produced in high quantities in wastewater treatment plants. However, its catalytic performance is restricted by either low concentration of persistent free radicals (PFRs) or aggregated active metal sites in the biochar. Herein, we report a strategy employing peracetic acid (PAA) pre-treatment to produce sludge-derived biochar (BC) with atomically dispersed iron and rich oxygen-based PFRs during mild pyrolysis. The dense extracellular polymeric substances (EPS) network of sludge treated by PAA were broken down to avoid iron aggregation and further enhance FeO coordination. The produced PFRs exhibited a high spin density of 5.92 × 1022 spins g−1 and g- factor = 2.0038, which might imply that oxygen-centered radicals are generated by the electron transfer in the presence of automatically dispersed iron. When using as a catalyst in dibutyl phthalate (DBP) degradation, the biochar removed 89.3% of DBP in 60 min with citric acid (CA) used as an electron shuttle to enhance PFR recovery and O2 reduction to hydroxyl radicals. EPR and DFT analyses suggest that the synergy between atomic Fe sites and oxygen-centered free radicals (PFRs) may promote the improvement of electron transfer efficiency. This finding points out the significance of sludge modification by PAA and provides an alternative technique for micropollutant removal by using persistent radicals from sludge-derived carbonaceous materials.
194. 题目: Biochar-based composites synergistically accelerate Co(II)/Co(III) and Fe(II)/Fe(III) cycles for efficient activation of PMS to degrade organic pollutants: enhancement mechanisms and degradation pathways
文章编号: N26032408
期刊: Separation and Purification Technology
作者: Xiaoye Deng, Kaiyun Luo, Qiulin Li, Long Wen, Xiangru Huang, Congjin Chen, Jing Liang, Zhangfa Tong
更新时间: 2026-03-24
摘要: To address the common issues of limited metal ion recycling efficiency and insufficient stability of active sites during the activation process of peroxymonosulfate (PMS), this study developed a ternary composite material consisting of CoFe2O4/BiOBr/C as an efficient activator. Magnetic CoFe2O4 was anchored on BiOBr via a hydrothermal method, followed by the in-situ growth of CoFe2O4/BiOBr on the biochar surface. This unique structure not only enhances the overall stability of the composite, reduces metal ion leaching and exposes more active sites, but also accelerates electron transfer and the efficiency of metal ion valence conversion. Experimental results demonstrate that the composite can efficiently activate PMS for atrazine degradation, achieving complete removal within 5 min with a kinetic constant (k) of 1.7849 min−1. The system maintains high catalytic activity and excellent stability in different water matrices and in the presence of various pollutants, exhibiting promising practical application potential. X-ray photoelectron spectroscopy (XPS) and electrochemical experiments before and after the reaction indicate that rapid electron transfer occurs in the system, which enhances the Co(II)/Co(III) and Fe(II)/Fe(III) redox cycles in the catalyst. Furthermore, three possible degradation pathways of atrazine are proposed, and the ecological toxicity of the pollutant is reduced after treatment. This study provides new insights into the development of high-efficiency heterogeneous PMS activation systems utilizing biochar supports and electron transfer strategies.
195. 题目: Thermochemical Valorization of Biomass Using Acid Mine Drainage: Syngas, Furfural, and Biochar-Based Catalysis for Acetaminophen Removal
文章编号: N26032407
期刊: Journal of Environmental Chemical Engineering
作者: Naeun Kim, Gihoon Kwon, Eilhann E Kwon, Hocheol Song
更新时间: 2026-03-24
摘要: Acid mine drainage (AMD) is a major environmental pollutant prevalent in areas impacted by mining activities. It poses serious risks to both human health and surrounding ecosystems due to its high acidity and the presence of toxic metals. In this study, AMD was utilized as a catalytic medium for the thermochemical conversion of sawdust (SD), aiming to valorize AMD and enhance the efficiency of the thermochemical process. AMD-treated SD was pyrolyzed under various conditions to examine product yields and their functional properties. AMD promoted the decomposition of hemicellulose and cellulose components in SD, leading to increased production of syngas (H2, CH4, and CO), and shifted the bio-oil composition toward higher yields of furfural and levoglucosenone (LGO). The biochar produced from AMD-treated sawdust exhibited a mesoporous structure and contained catalytically active species such as Fe⁰ and CaS. This biochar efficiently activated sodium persulfate for the degradation of acetaminophen (kobs = 0.04 min-1), with sulfate radicals (SO4•−) identified as the primary reactive species. The catalyst demonstrated high stability, maintaining over 91% acetaminophen removal efficiency after multiple reuse cycles. Overall, this study introduces a novel approach that integrates AMD valorization with the production of renewable fuels, platform chemicals, and functional biochar, offering a sustainable strategy for waste remediation and environmental applications.
196. 题目: Study on the Mechanism of Regulating Heavy Metal Lake Mud by Preparing Size-Structured Biochar from Sodium Alginate
文章编号: N26032406
期刊: Journal of Environmental Chemical Engineering
作者: Wenhui Yu, Jinchun Xue, Min He, Wenkai Li, Lijun He, Zhiwei Zhou
更新时间: 2026-03-24
摘要: Functionalized biochar application in regulating heavy metal contamination in soil is currently a hot topic in soil remediation research. This study focused on copper-contaminated lake mud from mining areas and developed a size-structured SA/CTS@BC composite using sodium alginate (SA) and chitosan (CTS) as modifiers. The Cu2+ adsorption performance of the composite and its role in regulating copper-contaminated lake mud were systematically investigated. SA/CTS@BC encapsulated biochar within a cross-linked SA-CTS network, forming a stable three-dimensional structure that markedly enhanced the mechanical strength and recyclability of the material. The adsorption results showed that Cu2+ uptake followed the pseudo-second-order kinetic and Langmuir isotherm models, indicating monolayer adsorption dominated by chemical interactions, with a maximum adsorption capacity of 282.99 mg·g-1. The pot experiments further demonstrated that SA/CTS@BC significantly improved the physicochemical properties of lake mud and enhanced enzyme activities. This study provided a theoretical basis and technical reference for the application of sodium alginate-based size-structured biochar composites in the remediation of heavy metal-contaminated lake mud.
197. 题目: Iron-functionalized biochar and manure compost mitigate polyethylene microplastic toxicity in soil via enhanced performance of Solidago canadensis
文章编号: N26032405
期刊: Journal of Environmental Chemical Engineering
作者: Abdulmalik H Altuwayjiri, Ishraga Galal Eldin, Malik Bader Alazzam, Saad Alrashdi, Maha Abdallah Alnuwaiser, Ahmed Mohajja Alshammari, Fathy Elsayed Abdelgawad
更新时间: 2026-03-24
摘要: Despite growing concern over microplastic (MPs) contamination in soils, little is known about the combined role of biochar (BC) and manure in mitigating their adverse effects on plant growth and physiology. The present study aimed to evaluate how iron enriched-biochar (Fe-BC) and farmyard manure (FM) modulate the negative impacts of MPs on Solidago canadensis. A pot experiment was conducted using Fe-BC (2% w/w), FM (2% w/w), and their combination (1% Fe-BC + 1% FM) in soils contaminated with MPs at concentrations of 250 and 500 mg kg⁻¹, arranged in a completely randomized design. The results showed that MPs at 500 mg kg⁻¹ significantly reduced shoot weight (31%), root weight (24%), chlorophyll a+b (20%), relative water content (RWC, 21%), and essential oil (EO) yield (35%), while increasing malondialdehyde (MDA, 95%) and electrolyte leakage (EL, 77%) relative to the control. In contrast, the application of Fe-BC and FM, particularly in combination, increased shoot weight (20%), root weight (15%), chlorophyll a+b (14%), and RWC (10%), while decreasing MDA (30%) and EL (23%) in plants exposed to 500 mg kg⁻¹ MPs. At 250 mg kg⁻¹ MPs, plants treated with the combined Fe-BC and FM showed higher total phenolic content and total flavonoid content compared to the control. The translocation factor of MPs decreased with increasing soil MP concentration, indicating a possible restriction in the movement of MPs from roots to shoots. Specifically, a 17% reduction in TF was observed at 500 mg kg⁻¹ PE-MPs. Heatmap analysis revealed that MDA and EL exhibited the highest variability among treatments, suggesting their potential use as indicators. Overall, the combined application of FM and Fe-BC is recommended to mitigate the negative effects of MPs in plants.
198. 题目: Sustainable process design for high-purity MoO3 production from shale: An integrated process of solvent-impregnated biochar enrichment and low-temperature chlorination distillation
文章编号: N26032404
期刊: Separation and Purification Technology
作者: Huimiao Zhong, Yong Fan, Yimin Zhang, Peng Liu, Hong Liu
更新时间: 2026-03-24
摘要: An integrated and environmentally friendly process combining solvent-impregnated biochar enrichment and chlorination distillation was developed to address challenges in recovering molybdenum from low-concentration acidic leachates and the use of chlorine gas in conventional chlorination methods. Initially, molybdenum was adsorbed from the leachate using solvent-impregnated biochar (SICB), achieving an adsorption efficiency of 98.91% and a saturated adsorption capacity of 53.850 mg/g under optimized conditions. The adsorbed molybdenum was desorbed with an ammonium bicarbonate solution of appropriate concentration. After evaporative concentration of the desorbed solution, the resulting solid was subjected to chlorination in an optimized molten salt system under optimal reaction conditions, producing MoO2Cl2 with a purity exceeding 99.9%. This step effectively removed impurities such as sodium, potassium, and iron, while the low reaction temperature and avoidance of chlorine gas reduced energy consumption. Finally, using the aqueous solution of the high-purity MoO2Cl2 as feedstock and melamine as the precipitating agent, MoO3 with a purity of over 99.9% was successfully prepared. This integrated process enables efficient separation of molybdenum from impurities, eliminates the use of chlorine gas, and offers promising prospects for the comprehensive recovery of valuable metals from vanadium shale.
199. 题目: Revisit the improvement of coagulation pretreatment on ozonation performance: The critical roles of HO• and O3 for effluent organic matter transformation and micropollutant degradation
文章编号: N26032403
期刊: Journal of Cleaner Production
作者: Rui Hu, Hao-Tong Zheng, Boxi Tang, Jialing Tu, Yu-Hong Cui, Xuedong Zhai, Gang Wen, Zheng-Qian Liu
更新时间: 2026-03-24
摘要: Effluent organic matter (EfOM) from municipal wastewater treatment plants is an emerging concern because of its refractory and potential risk to ecological environment. Herein, this investigation comprehensively evaluated the effects of HO• and O3 exposures on EfOM transformation and micropollutant degradation under different pre-coagulation operating conditions during ozonation. Compared to coagulation and ozonation alone, coupling two processes could effectively reduce total organic carbon, color and UV254 of effluent. Fe-based coagulant was easier to combine with OH− to generate floc in bulk than Al-based coagulant for EfOM capture, which could decrease total scavenging capacities of effluents as well as increase the exposures of O3 and HO• during ozonation, enhancing ozonation efficiency for EfOM degradation. EfOM from membrane bioreactor treatment was more difficult to capture during pre-coagulation but more easily degraded during ozonation than that from conventional activated sludge treatment due to its lower molecular weight distribution and higher contents of humic-like and tryptophan-like substances. Parallel factor analysis shows that coagulation combined with ozonation breaks the fluorescent groups of humic-like and tryptophan-like substances effectively. Molecular weight distribution determination indicates that coupling two processes could more effectively remove humic-like substances, organic colloids and polysaccharides compared to coagulation or ozonation alone. Furthermore, micropollutants with higher energy of highest occupied molecular orbital were degraded more efficiently during ozonation. The investigation reveals that O3 utilization efficiency for micropollutant degradation can be significantly improved by pre-coagulation, offering new ideas for reducing energy consumption during advanced ozonation treatment and ensuring the safety of effluent and sustainable water reuse.
200. 题目: Biochar from wet-process phosphoric acid in-situ modified bagasse for Cr (VI) removal
文章编号: N26032402
期刊: Journal of Cleaner Production
作者: Mouxiao Song, Xiaohou Zhou, Jiapeng Wu, Jingxu Yang, Xinlong Wang
更新时间: 2026-03-24
摘要: The treatment of biomass waste and remediation of environmental pollution caused by heavy metal ions have become critical concerns in environmental science. Herein, an innovative approach was developed to substitute conventional phosphoric acid modification of ready-made biochar. Waste bagasse was treated in situ with wet-process phosphoric acid(WPPA) to prepare a novel biochar material for Cr (VI) removal from industrial wastewater. The adsorption efficiency of Cr (VI) was systematically investigated using biochar pyrolyzed at various temperatures. Furthermore, comparative analyses were conducted to evaluate the structural properties of biochar before and after WPPA modification, along with their corresponding Cr (VI) adsorption performances. The GW400 biochar, modified with WPPA and pyrolyzed at 400 °C, demonstrated significantly enhanced characteristics, including abundant surface functional groups, larger specific surface area (SSA) and higher carbon yield. This in situ modification consequently achieved Cr (VI) adsorption rate of 96% with a maximum adsorption capacity of 97.38 mg/g. Kinetic studies revealed rapid adsorption characteristics, with the pseudo-second-order model indicating that 90% of the total adsorption capacity could be achieved within the initial 10 min. The results of adsorption experiments and DFT calculations jointly demonstrated that the main adsorption mechanisms involve electrostatic attraction, redox and surface complexation. This work presents an efficient, economical and green way of water treatment based on the principle of waste for waste.