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41. 题目: Engineered cake layer via organosilicon-modified coagulant aid for regulating fouling behavior and enabling ultra-low-pressure microfiltration of PFOA and NOM
文章编号: N26040705
期刊: Journal of Membrane Science
作者: Langrun Song, Jun Nan, Yunyun Cao, Hui Zhang, Xiaoyue Zhang, Zhencheng Ge, Wenxing Jin, Ying Wang, Meng Chen
更新时间: 2026-04-07
摘要: Ultra-low-pressure ceramic microfiltration (ULPCM) is fundamentally constrained by the permeability-selectivity trade-off: the accumulation of compact cake layers increases hydraulic resistance, whereas the intrinsic large pore size of microfiltration membranes limits the rejection of trace micropollutants. In this study, a tri-functional quaternary ammonium silane (AC) was introduced during polyaluminum chloride (PACl) pre-coagulation to regulate floc architecture and engineer the structure of the coagulation-derived cake layer. During 360 h (15 d) of continuous operation in both synthetic surface water and actual surface water, the AC-integrated system achieved a stable normalized flux (J/J₀ = 0.38-0.40) and exceptional PFOA sequestration (>93.71%), significantly outperforming conventional systems. Molecular dynamics (MD) simulations and spectroscopic analyses (XPS/FT-IR) elucidated that the C₁₈ alkyl chains and quaternary ammonium groups dictate PFOA capture through synergistic hydrophobic and electrostatic interactions, while hydrophilic silanol groups enhance dissolved organic carbon (DOC) removal via hydrogen bonding. At the interfacial level, XDLVO theory and dynamic light scattering (DLS) quantification revealed that AC effectively regulates the thermodynamics of floc adhesion, promoting the assembly of a highly branched, low-fractal-dimension (D_f) scaffold. Morphology measurements confirmed that the engineered cake layer maintained a high porosity (up to 62.79%) with a pore size distribution dominated by micro-channels (< 0.5 μm), which enhanced the water permeability of the cake layer and its retention capacity for foulants. Integrated fouling analysis using Hermia, Tansel, and saturation decay models, together with statistical evaluation, demonstrated that floc size, cake layer porosity, pore size distribution, and AC-induced hydrophobic interactions played key roles in mitigating membrane fouling and enhancing contaminant retention. These findings highlight that regulating floc architecture via amphiphilic coagulant aids provides an effective strategy for engineering cake layer microstructure and mitigating membrane fouling in low-pressure microfiltration systems.

42. 题目: Aquatic Toxicological Assessment of Solid Pyrolysis Product (SPP) from Synthetic Textile Feedstock Relative to Biochar, Carbon Black, and Activated Carbon
文章编号: N26040704
期刊: Environmental Science & Technology
作者: Ilona Juvonen, Younghoon Kwon, Dong Li, Liviu Iancu, Amanda Strom, Hugh McLaughlin, Megan T Valentine, Monika Mortimer, Patricia A Holden
更新时间: 2026-04-07
摘要: Pyrolysis as a waste conversion process appears relatively feedstock-agnostic, yielding carbonaceous solid pyrolysis products (SPPs) plus condensable gases. Ground SPPs may substitute for or improve upon other carbon commodity particles, yet the environmental hazards of textile-derived SPPs have not been characterized. Here, we produced SPP particles from textile waste feedstock and from wood (biochar) using a pyrolysis process that could scale to waste management. We used electron microscopy, spectroscopy, gas adsorption, and standardized biochar analyses to characterize the chemical, morphological, and surface functionalization properties of the products. Base food-web aquatic toxicity of particle suspensions, relative to industrial carbon black and powdered activated carbon (AC), was assessed for particle concentrations up to 500 mg L^–1, using marine bacterial (Aliivibrio fischeri) bioluminescence, freshwater protozoan (Tetrahymena thermophila) viability, growth and particle uptake, and freshwater microalgal (Raphidocelis subcapitata) growth. Although exposure was confirmed, for example, by protozoan ingestion of SPPs, there were no inhibitory effects of textile SPP on bacterial bioluminescence, protozoal viability or growth, or microalgal growth; textile SPP leachates appeared stimulatory to microalgae. These results suggest that SPPs from synthetic textile feedstocks may be biologically compatible with aquatic ecosystems, whereas AC induced dose-dependent reactive oxygen species (ROS) production in abiotic conditions and inhibited A. fischeri bioluminescence. This study provides critical new data on the aquatic biocompatibility of textile SPPs, supporting the circular economy by exploring the environmental safety of the conversion of mixed, synthetic textile waste.

43. 题目: Modelling Long‐Term Effects of Soil Compaction on Crop Yield, Soil Organic Carbon Stocks and Nitrogen Losses From Soil
文章编号: N26040703
期刊: European Journal of Soil Science
作者: Alejandro Romero‐Ruiz, Lorena Chagas Torres, Mathieu Lamandé, Michael Kuhwald, Thomas Keller
更新时间: 2026-04-07
摘要: Soil compaction is an increasing environmental threat due to agricultural intensification. Compaction negatively affects both agricultural production and key soil environmental functions. In this study, we developed a novel soil‐compaction‐agroecosystem modelling framework to systematically assess the consequences of soil compaction on crop yield, soil organic carbon stocks, nitrous oxide emissions and nitrogen leaching in the long‐term. The modelling was done for different soil textures, different climatic conditions and different soil structure recovery rates, each of them tested comprising three cases. We compared simulations with data from field observations compiled from the literature. The modelling results reproduced most trends reported in the literature. Comparing compacted vs. non‐compacted simulations, the accumulated effects over a 20 year‐long period caused by a single wheeling event (two axle passes with 8 Mg wheel load) on a loamy soil without soil structure recovery and weather conditions of central Europe were estimated to account for an accumulated loss of about 21 Mg ha −1 in cereal grain yield, a decrease of nearly 1.8% in soil organic carbon (corresponding to a loss of about 1 Mg ha −1 ), an increase of 130% in nitrous oxide emissions (about 0.5 kg ha −1 annual increase) and an increase of 15% in nitrate leaching (annual increase of approximately 8 kg ha −1 ). This work offers a novel approach for accounting for effects of compaction on interacting soil processes and enables the quantification of long‐term adverse impacts of soil compaction on key soil ecosystem services across diverse pedoclimatic conditions, thereby providing a scientific basis for the design of effective mitigation strategies.

44. 题目: A Classification Framework for Carbon Sequestration Potential: Modelling Soil Carbon Pools With Environmental Data
文章编号: N26040702
期刊: European Journal of Soil Science
作者: Longnan Shi, Sharon O'Rourke, Karen Daly
更新时间: 2026-04-07
摘要: This study aimed to develop a comprehensive spatial assessment of soil carbon sequestration potential for supporting future decisions on soil carbon stock monitoring and management. Firstly, the spatial distribution of soil organic carbon (SOC) and mineral associated organic carbon (MAOC) was mapped at the 500 m resolution at the northern half of Ireland using machine learning tools with environmental covariates and soil geochemistry. Random forest models achieved robust estimations of SOC and MAOC, with R 2 values of 0.69 and 0.73 respectively. Afterwards, carbon sequestration potential was assessed using two complementary approaches: (1) quantile regression to estimate MAOC saturation and deficit, and (2) a data‐driven method using agroclimatic‐landcover units to estimate achievable SOC levels. These approaches revealed contrasting spatial patterns, reflecting different carbon storage mechanisms constrained by mineralogy versus climate‐land cover conditions. Hence, we integrated both methods into a comprehensive framework to support decision‐making for carbon farming. Classified by below or above the mean value of estimated SOC seq and MAOC seq , a four‐classification framework of high/low SOC seq by high/low MAOC seq was established and mapped to delineate areas in each class with distinct sequestration potential characteristics and corresponding management strategies. These included dual saturation areas (Low SOC seq –Low MAOC seq : 34.87%) requiring protection strategies and dual high potential areas (High SOC seq –High MAOC seq : 32.93%) ideal for carbon farming projects, with other areas having specific limitations in either MAOC (High SOC seq –Low MAOC seq : 20.24%) or SOC (Low SOC seq –High MAOC seq : 11.95%) accumulation. This provides a practical and effective framework that supports targeted policymaking for soil carbon management and climate mitigation.

45. 题目: Tailored design of waste-derived hydrochar for sustainable soil remediation: A review.
文章编号: N26040701
期刊: Journal of Environmental Management
作者: Songxiang Zeng, Jing Ai, Chaolei Yuan, Jingna Liu, Yuqing Sun
更新时间: 2026-04-07
摘要: Hydrothermal carbonization (HTC) is a sustainable technology that converts wet biomass into hydrochar, a value-added material whose unique physicochemical properties can enhance soil health and crop productivity. Despite increasing research, the transition of hydrochar from laboratory-scale characterization to field-scale application in precision agriculture remains limited. This review critically assesses hydrochar-soil interaction mechanisms to bridge the gap between chemical engineering and soil ecology. We examine the influence of feedstock composition and key HTC parameters (temperature, residence time, solid-to-liquid ratio, and reaction atmosphere) on hydrochar's physicochemical properties and its subsequent role in soil remediation. We also discuss the often-overlooked issue of hydrochar ageing and the complexities in remediation studies arising from short-term experiments, mechanistic uncertainties, and a lack of standardized protocols. Specific attention is given to hydrochar's role in ameliorating saline-alkali soils. Unlike pyrolytic biochar, which relies on stable aromatic structures for long-term carbon sequestration, hydrochar is rich in oxygen-containing functional groups (OFGs) and dissolved organic matter (DOM). This unique composition, despite its lower stability, makes hydrochar an excellent medium for promoting rapid nutrient cycling and stimulating microbial activity. However, challenges persist, including concerns over its long-term stability, potential nutrient leaching, inconsistent effects across different soil-crop systems, phytotoxicity, and a lack of field-scale validation. These uncertainties hinder accurate assessments of its long-term environmental impact. Therefore, optimizing feedstock composition and HTC parameters to tailor hydrochar for specific soil constraints is essential for establishing it as a dual-purpose strategy for waste management and sustainable soil remediation.

46. 题目: Adsorption of Tetracycline From Water by a Kind of Recyclable Sodium Alginate/Polyvinyl Alcohol Granular Biochar Adsorbent
文章编号: N26040602
期刊: Clean - Soil Air Water
作者: Xiuqing Li, Hailong Tian, Dayang Yu
更新时间: 2026-04-06
摘要: The persistence and antibiotic resistance potential of tetracycline (TC) from livestock and poultry farming pose severe ecological and human health risks. To address this issue, we developed a recyclable S/N co‐doped tea residue biochar (GSNTB), encapsulated within a matrix of sodium alginate (SA) and polyvinyl alcohol (PVA). Characteristic peaks in the FT‐IR spectrum confirmed the presence of N‐ and S‐containing functional groups on the adsorbent. Meanwhile, the x‐ray photoelectron spectroscopy (XPS) results showed a decrease in the peak areas corresponding to N 1s at 398.6, 399.49, and 401.3 eV, as well as the peak areas of S 2p at 164.0 and 165.4 eV, confirming the involvement of nitrogen‐ and sulfur‐containing groups in the reaction process. Adsorption followed the Langmuir model, yielding a 95.01 mg g −1 maximum capacity. After five repeated uses, the removal efficiency of TC could reach over 85%. With its strong adsorption capacity, high mechanical strength, and excellent reusability, GSNTB shows great promise for practical use in treating wastewater.

47. 题目: Nocturnal evolution of physicochemical characteristics of water-soluble and insoluble organic aerosols in a polluted environment: new insights from a combined online and offline study
文章编号: N26040601
期刊: Environmental Pollution
作者: Megha Anand, Abhishek Chakraborty, Shamjad P Moosakutty, Pradhi Rajeev, Satish Rangu, Tarun Gupta, Neeraj Rastogi
更新时间: 2026-04-06
摘要: The Indo-Gangetic Plain faces severe winter pollution, driven largely by combustion emissions of black carbon and organic carbon. However, the evolution of light-absorbing organic carbon, or brown carbon, remains poorly constrained. In this study, the chemical and optical properties of water-soluble and insoluble organic aerosol fractions in Kanpur, India, were characterized using online aerosol mass spectrometry combined with extraction and optical analysis. The water-soluble fraction was more oxidized (O:C = 0.60–0.85; H:C = 1.38–1.22) and dominated by oxygenated compounds (CHO ≈ 66% of organics), including organosulfates (≈4.9%). The insoluble fraction retained hydrocarbon-like and nitrogen-rich character (CH = 35.4%; CHN = 18%; N:C ≈ 0.12; f₆₀ = 1.30%). These differences produced contrasting optical behavior: the water-soluble fraction showed moderate absorption (16.0 Mm^-1 at 370 nm; mass absorption efficiency 1.23 m² g^-1), while the insoluble fraction exhibited stronger absorption (50.8 Mm^-1 at 370 nm; mass absorption efficiency 1.43 m² g^-1), attributed to hydrophobic nitrogen-containing aromatics. Across the nocturnal period (21:00–02:00 to 02:00–07:00), relative humidity increased from 95% to 99%, aerosol liquid water content from 703 to 4398 μg m^-3, and pH from ≈4.0 to 4.8. This coincided with increases in nitrogen-containing species, including organonitrates (2.29 → 2.58 μg m^-3; ON/OA 0.21 → 0.23), CHON (+9%), CHO>1N (+37%), and oxidation (O:C 0.72 → 0.75). Simultaneously, the water-soluble fraction underwent wavelength-dependent bleaching (−16% at 370 nm, −29% at 420 nm, and −64% at 470 nm). These results demonstrate that solubility governs nighttime brown carbon chemistry: the water-soluble fraction transforms rapidly, whereas the insoluble fraction retains absorbing chromophores.

48. 题目: Biochar as an adsorbent for microplastics present in aquatic environments: a comparative review between batch and column adsorption
文章编号: N26040521
期刊: Journal of Environmental Chemical Engineering
作者: Rohit Chandravanshi, Aradhana Tiwari, Ankesh Tiwari, Rashmi Dubey, Sudhir Kumar Pandey
更新时间: 2026-04-05
摘要: Microplastics (MPs) are emerging contaminants recognised in the domain of plastic pollution; their presence has been observed across all environmental matrices. Exposure to these MPs poses serious health risks to humans and represents an alarming threat to all organisms that unknowingly consume these small particles. Due to the lack of MPs-specific treatment technologies in wastewater treatment plants (WWTPs), MPs contamination in aquatic and terrestrial ecosystems is primarily caused by WWTPs. Biochar’s exceptional surface properties make it a promising biosorbent for the treatment of these MPs. This review extensively examines the possibilities of biochar for removing MPs from the aquatic environment, underscoring its diverse feedstock materials for adsorbent production, comparative performance with conventional adsorbents, and adsorption studies. Evaluation of several findings of batch and column adsorption studies, this review advances the perception of biochar–MPs interactions and their implications for process design. Batch reactors are widely used in laboratory studies and small-scale operations due to its simplicity, cost-effectiveness, and easy to control mechanism. In contrast, fixed-bed columns are the most preferable option for large-scale, continuous processes since they are beneficial for enhanced mass transfer, extended residence times, and the capacity to sustain a constant concentration gradient throughout adsorption. Based on the result obtained from the previous studies batch adsorption systems showed removal efficiencies in the range of 78-99%; however, fixed-bed column systems have demonstrated relatively higher efficiencies in the range of 85-100%. As such, fixed-bed columns systems appeared to be prior choice for MPs remediation in wastewater systems for real world applications.

49. 题目: Dual-Pathway Catalysis: Nano Fe-Modified Platanus Fluff Biochar Mediates Peroxymonosulfate Activation for Enhanced Tetracycline Hydrochloride Degradation Through Radical and Non-Radical Synergies
文章编号: N26040520
期刊: Journal of Environmental Chemical Engineering
作者: Yuanyu Shan, Bo Song, Gaoyani Ku, Lei Wang, Zhibin Wang, Chen Chen, Nurudeen Abiola Oladoja, Jafar Ali, Evgeni M Glebov, Xuliang Zhuang
更新时间: 2026-04-05
摘要: This study employed a waste-to-resource strategy to transform an environmental nuisance into a high-value functional material, thereby achieving the dual benefits of wastewater remediation and resource valorization. Since iron-based catalysts supported on biochar is a promising strategy for activating peroxymonosulfate (PMS), Fe-modified Platanus fluff biochar (Fe@SUBC) was synthesized via the impregnation-pyrolysis method, using urban biowaste Platanus fluff and ferric citrate as precursors, for the remediation of tetracycline hydrochloride (TC) contaminated water. The results demonstrated that Fe@SUBC pyrolyzed at 600℃ (Fe@SUBC600) achieved about 90.0% TC degradation within 90 minutes at the optimal conditions (Fe@SUBC600 dosage of 0.6 g/L, PMS dosage of 0.1 g/L, initial TC concentration of 10 mg/L). The material maintained high activity over a broad pH range of 3 ~ 9, indicating wide applicability. Iron leaching during the reaction was found to be as low as 38.13 μg/L, demonstrating minimal secondary pollution risk. The TC degradation proceeded via synergistic radical (SO₄•⁻ and •OH) and non-radical (¹O₂ and direct electron transfer) pathways. The abundant C=C bonds and oxygen vacancies on the biochar accelerated the interfacial electron transfer, while the supported Fe(II)/Fe(III) redox cycle continuously activated the PMS to generate reactive oxygen species, collectively enhancing degradation performance. Moreover, the generated intermediates show lower ecotoxicity than TC, confirming effective detoxification. The performance of Fe@SUBC600 in PMS-driven antibiotic oxidation not only demonstrated its great potential as a sustainable catalytic material, but also highlighted its dual environmental benefits by simultaneously addressing urban waste management and enabling green remediation of antibiotic-containing wastewater.

50. 题目: Phosphorus-Modified Biochar for Heavy Metal Passivation and Soil Improvement: From Preparation to Mechanistic Understanding
文章编号: N26040519
期刊: Journal of Environmental Chemical Engineering
作者: Ting Ma, Yingying Wu, Haibo Li
更新时间: 2026-04-05
摘要: As a multifunctional remediation material, phosphorus-modified biochar (P-BC) has received increasing attention for its ability to immobilize heavy metals (HMs) and improve soil quality. Although several review papers have discussed BC-based amendments for HM remediation, a systematic review focusing specifically on P-BC is still lacking. Especially, the key factors governing its preparation, comprehensive mechanisms of HM passivation and coupled effects on soil function amelioration have not yet been systematically clarified. To address this gap, this review comprehensively examines the effects of biomass composition, synthesis parameters, modification techniques and P sources on the preparation of P-BC. Furthermore, the mechanisms by which P-BC promotes HM passivation are deeply categorized into three pathways: i) direct interaction between P-BC and HMs (e.g., adsorption, precipitation, complexation), ii) indirect effects mediated by changes in soil properties (e.g., pH, CEC, organic carbon content), iii) the couple of direct interaction and indirect interaction. Additionally, the potential of P-BC to improve soil properties, augment fertility, and regulate bioactivity is clearly elaborated. Eventually, the existing challenges and future research directions are outlined. In general, this review provides a distinct perspective by linking P-BC preparation strategies with its multifunctional performance in HM immobilization and soil improvement. This review aims to provide theoretical guidance for the rational design of efficient and sustainable P-BC materials for soil remediation and quality improvement.

51. 题目: Mineral-driven accumulation of microbial necromass enhanced humification during composting
文章编号: N26040518
期刊: Journal of Environmental Chemical Engineering
作者: Wenjie Chen, Yan Yang, Kui Zhang, Su Chang, Yuan Chang, Ji Li, Xia Liang, Yifan Liu, Long D Nghiem, Mohan Bai, Huike Ye, Zichao Zhao, Yuquan Wei
更新时间: 2026-04-05
摘要: Composting supports cleaner production and the circular bioeconomy by stabilizing organic wastes, yet how mineral amendments steer microbial necromass accumulation and its incorporation into humic substances remains insufficiently resolved. Here, sepiolite, pyrolusite, and shale were compared for their impacts on humification, mineral-associated organic matter (MAOM) formation, bacterial and fungal necromass pools, and microbial succession during composting. Mineral amendments significantly increased humification, with a pronounced enhancement of MAOM and MAOM-associated humic substances (MAOM-HS). Sepiolite achieved the highest total humic substances (HS; 40.17 g kg⁻¹), increased MAOM-HS to 27.47 g kg⁻¹, and raised MAOM content by ~160%. Sepiolite and pyrolusite also accelerated microbial necromass accumulation, particularly fungal necromass. High-throughput sequencing indicated that sepiolite mitigated fungal diversity loss during maturation, and all amendments advanced bacterial succession toward Proteobacteria dominance. Variance partitioning and partial least squares structural equation modeling consistently showed strengthened necromass associations with mineral-associated humic pools after mineral addition, with fungal necromass explaining up to 41.5% of MAOM-HS variance. Together, these results indicate that reactive mineral surfaces (especially sepiolite and pyrolusite) promote humification primarily by enhancing necromass retention and its transfer into MAOM-HS, providing actionable guidance for mineral-enabled organic waste valorization.

52. 题目: Humic and Fulvic Acid Fractions Differentially Regulate Methane-Dependent Arsenate Reduction in Paddy Soils
文章编号: N26040517
期刊: Environmental Science & Technology
作者: Yu Zhang, Yun Chen, Fengjie Liu, Yves Plancherel, Andreas Kappler, Lina Zou, Olubukola Oluranti Babalola, Ayansina Segun Ayangbenro, Xianjin Tang
更新时间: 2026-04-05
摘要: Arsenic (As) contamination in paddy soils threatens global food security because microbial reduction of arsenate (As(V)) to mobile arsenite (As(III)) drives As mobilization. Methane (CH₄)-dependent As(V) reduction (M-AsR) is a key route coupling CH₄ cycling to As release, yet how structurally distinct soil organic matter (SOM) fractions regulate this pathway remains poorly understood. Here we show that an aromatic, quinone-rich humic acid fraction enhances electron transfer and promotes coupling of CH₄ oxidation to As(V) reduction, accelerating iron (Fe)-As mineral dissolution and increasing As(III) release by ∼1.5-fold. Accordingly, copy numbers of NC10-targeted pmoA, ANME-2d-targeted mcrA, and arrA increased by 116.6%, 126.5%, and ∼2.4-fold, respectively. In contrast, a carboxyl-rich fulvic fraction promoted acetate accumulation, thereby making CH₄-driven metabolism thermodynamically unfavorable. NC10-targeted pmoA and ANME-2d-targeted mcrA signals consequently decreased by 95.3% and 89.6%, respectively, and M-AsR was largely blocked, with the CH₄-driven As(III) component increasing by only 47.9%. Crucially, humic acid acts as an electron shuttle linking CH₄ oxidation and As(V) reduction, while fulvic acid disrupts this coupling process via acetate accumulation, highlighting the need for molecular-level SOM characterization to predict As risks in flooded soils.

53. 题目: The Effects of Biochar on the Revival and Performance of an Organohalide-Respiring Mixed Culture
文章编号: N26040516
期刊: Environmental Science & Technology
作者: Weilun Zhao, Hongyu Dang, Han Cao, Sumbul Hafeez, Wenqing Xu, Timothy E Mattes
更新时间: 2026-04-05
摘要: Anaerobic reductive dechlorination of chlorinated ethenes (CEs) in groundwater, driven by bioaugmentation of organohalide-respiring bacteria (OHRB), can stall when OHRB abundance and activity are low, leading to incomplete dechlorination and daughter-product accumulation. Pyrogenic carbonaceous matter (PCM), increasingly applied as CE sorbents in groundwater, may enhance OHRB performance. We evaluated how poplar biochars pyrolyzed from 350 to 900 °C influence ethene formation and methanogenesis in an anaerobic tetrachloroethene (PCE)─dechlorinating consortium with initially low OHRB activity. The stressed consortium accumulated cis-dichloroethene and produced no ethene in controls without biochar (no materials and sand), but completely dechlorinated PCE to ethene in all biochar treatments. Compared to controls, OHRB in biochar treatments more strongly expressed genes for biofilm formation, resuscitation, cobalamin transport and salvage, and pilus formation, indicating their involvement in OHRB revival in the presence of biochar. Ethene production rates were higher with less apolar biochars produced at 350–500 °C (5.1–5.6 μmol/bottle/day) than with more apolar biochars produced at 700–900 °C (3.2–3.7 μmol/bottle/day). A positive correlation between ethene formation rate and biochar pore size suggests that CE pore-filling and desorption hysteresis affect ethene production. These results identify material properties that can be tuned to enhance targeted biological activity and inform PCM-based CE bioremediation strategies.

54. 题目: Fate of Organic Carbon Shaped by Iron Minerals in Coastal Wetlands: Mechanisms and Implications
文章编号: N26040515
期刊: Environmental Science & Technology
作者: Yanran Shao, Shanshan Sun, Shaoxuan Ding, Yuanjun Peng, Xushun Gu, Keiichi Mochida, Shengbing He
更新时间: 2026-04-05
摘要: Coastal wetlands are premier blue carbon sinks, yet the stability and fate of their organic carbon (OC) are profoundly shaped by complex biogeochemical interactions with iron minerals. This review provided a systematic analysis of iron-mediated OC dynamics by resolving the “coastal syndrome”─the synergistic regulation of Fe-OC interactions by salinity fluctuations, tidal hydrodynamics, and halophytic vegetation. We elucidated how iron minerals govern OC fate through multipathway stabilization (adsorption, coprecipitation, and aggregation) and simultaneous mineralization driven by redox transitions, including Fe(III) reduction and Fe(II)-catalyzed reactive oxygen species (ROS) production. Crucially, we emphasize the active role of OC as a redox mediator─acting as electron shuttles and complexing agents─that regulates iron transformation and bioavailability. Also, we synthesized microscale mechanisms and responses to environmental drivers, emphasizing dynamic regulation of interactions between iron minerals and OC by salinity fluctuations, tidal hydrodynamics, vegetation rhizospheres, and their joint effects. Integrating these mechanistic insights, we proposed a transition toward a unified, multifactor coupling framework to better predict and manage the carbon sink functionality of coastal wetlands. This review offered a mechanistic basis for linking saltwater intrusion, iron redox dynamics, and microbial metabolism to carbon sequestration in coastal blue carbon ecosystems.

55. 题目: Simultaneous removal of nitrate, sulfamethoxazole, and cadmium in a bioreactor enhanced by reduced graphene oxide modified biochar
文章编号: N26040514
期刊: Chemical Engineering Journal
作者: Jiangtao Bai, Yihan Bai, Ying Zhang, Junfeng Su, Yue Wang, Xue Li, Jizhi Ren
更新时间: 2026-04-05
摘要: In this study, a bioreactor with manganese oxidation coupled with denitrification was constructed by reduced graphene oxide-modified coconut shell biochar and hydrogel (rGO-CSB@hydrogel) loaded with strain ZY8, enabling simultaneous removal of nitrate (NO₃⁻-N), sulfamethoxazole (SMX), and cadmium (Cd(II)). Under the conditions of HRT = 4.0 h, C/N = 2.0, and pH = 7.0, the reactor achieved a NO₃⁻-N removal efficiency of 95.1%, while the removal efficiencies of Cd(II) and SMX reached 91.4% and 97.3%. The rGO-CSB@hydrogel significantly improved electron transfer efficiency within the reactor and enhanced denitrification performance. The reactor attained efficient removal of Cd(II) and SMX via adsorption and biological precipitation. High-throughput sequencing analysis revealed that Zoogloea consistently maintained a dominant position, playing a central role in the removal of pollutants. KEGG pathway analysis showed that the microbial community maintained metabolic stability under combined pollution by retaining intact nitrogen metabolism pathways and the elevated predicted relative abundance of manganese transport-related functional genes. This research offers a novel insight for the synergistic control of co-pollutants in aquaculture wastewater.

56. 题目: Mechanistic insight into photodegradation of agricultural mulch films mediating the release micro(nano)plastic and dissolved organic matter to aquatic environments
文章编号: N26040513
期刊: Chemical Engineering Journal
作者: Mengjie Wang, Huiming Yu, Jing Wei, Wenyi Xie, Xuwei Li, Lingya Kong, Ya Zhang, Tao Long, Qiong Wang, Shaopo Deng, Shixiang Gao, Wen-Tao Li
更新时间: 2026-04-05
摘要: The widespread use of agricultural mulch films (AFs) has led to environmental concerns over their potential effects on adjacent aquatic ecosystems. This study systematically investigated the photodegradation behavior and mechanism of AFs in aquatic environments by monitoring the release of microplastics/nanoplastics (MPs/NPs) and dissolved organic matter (AF-DOM), with a focus on comparing traditional and biodegradable AFs. During photoaging, the surface characteristics and functional groups of biodegradable polyadipate/butylene terephthalate (PBAT) film changed significantly greater than those of traditional polyethylene (PE) film. PBAT films exhibited a greater capacity to release MPs and NPs, releasing 1.44 × 105 MPs/g and 9.80× 1011NPs/g compared to 3.36 × 104 MPs/g and 7.58 × 1011 NPs/g for PE films after 240 h irradiation. The components of AF-DOM were separated and determined by molecular weight using a size-exclusion chromatography−diode array detector−organic carbon detector (SEC-DAD-OCD) and a fourier transform ion cyclotron resonance mass spectrometer, and the results showed that PBAT generated a larger amount of DOM, along with more fluorescent and aromatic compounds and a higher degree of oxidation. In addition, after 240 h exposure to photoaging PBAT leachate, the GES-1 cells survival rate dropped to 40.1%, which was much higher than that of PE filtrate. The presented data provided a new insight into the transformation process and ecological risk of AF in environment.

57. 题目: Disentangling effects of protection on seabed organic carbon and biodiversity in a rare highly protected mud-dominated MPA.
文章编号: N26040512
期刊: Estuarine, Coastal and Shelf Science
作者: Benjamin Harris, Tara Williams, Mara Fischer, Torsa Sengupta, Ceri Lewis, Adam Porter, Julie Hawkins, Zoe Roseby, Callum Roberts
更新时间: 2026-04-05
摘要: Soft sediment habitats on the European shelf have endured centuries of bottom trawling, causing major biodiversity loss and long-term degradation. Due to sustained value to commercial fisheries and perceptions of low biodiversity value, they have been overlooked in the designation of MPAs. Recently, the role these habitats and their ecological communities may play in carbon storage has emerged as a compelling argument for strict protection. We investigated the effects of seabed protection on biodiversity and sediment organic carbon (OC) in a rare, highly protected, mud dominated MPA, the South Arran Marine Protected Area. Despite the challenge of confounding environmental variables inherent to coastal MPAs, we showed strong positive responses of infaunal biodiversity metrics to protection. Organic carbon concentration was driven primarily by sediment mud content; however, protection increased the total OC–to–mud ratio and stabilized the positive mud–OC relationship which was significantly less reliable in the unprotected zone. Our results demonstrate that protecting soft sediments can enhance biodiversity and may contribute to climate mitigation. We call for their consideration in the establishment of strict, well-enforced MPAs as an opportunity to re-calibrate chronically shifted ecological baselines, and to understand their potential in carbon storage.

58. 题目: Freeze-thaw cycles modulate dissolved organic matter retention in soils: Spectroscopic evidence from coupled freeze-thaw and snowmelt-infiltration simulations
文章编号: N26040511
期刊: Soil and Tillage Research
作者: Jing-jing Wang, Qing-wei Zhang, Guo Chen, Feng-bao Zhang, Jian Wang, Ming Li, Hao Wang
更新时间: 2026-04-05
摘要: Freeze-thaw cycles (FTCs) exerted a strong influence on the migration and retention of dissolved organic matter (DOM) in seasonally frozen soils, yet the underlying mechanisms remained insufficiently understood. This study examined how repeated FTCs regulated DOM retention and chemical characteristics in black soil using controlled freeze-thaw and snowmelt infiltration simulations. In soils without infiltration, increasing freeze-thaw frequency led to a decline in microbially derived protein-like components from 22.80% to 8.04%, accompanied by a corresponding increase in plant-derived, highly humified humic-like fractions from 77.2% to 91.96%. Relative to unfrozen controls, freeze-thaw cycling promoted the accumulation of humic-like components while suppressing protein-like fractions. At the high FTC frequencies (>12), DOM molecular weight increased, aromaticity declined significantly, and the proportion of humic-like components increased by 15.12%, indicating enhanced apparent stability of DOM. Under leaching conditions, however, freeze-thaw-induced changes in DOM composition diverged from those observed under non-infiltrated conditions. DOM in freeze-thawed soils shifted toward less humified, autochthonous protein-like components, with their proportion increasing from 10.35% to 15.35%, whereas unfrozen soils exhibited the opposite pattern. In addition, high FTCs frequencies increased dissolved organic carbon leaching losses by 34.9%. These results demonstrated that freeze-thaw-induced humification enhanced apparent DOM stability only under non-leaching conditions, but did not prevent carbon mobilization during infiltration. Overall, this study revealed a hydrologically dependent mechanism by which FTCs decouple DOM stabilization from carbon retention, providing new insights into soil carbon vulnerability in cold agricultural regions experiencing intensified freeze-thaw activity and runoff.

59. 题目: Valorization of pineapple leaf waste into Fe-Modified biochar for efficient H2S adsorption
文章编号: N26040510
期刊: Bioresource Technology
作者: Napasson Chanka, Susanne Gross, Kulpavee Jitapunkul, Pimchanok Khwanprasert, Nevzat Yigit, Günther Rupprechter, Paweena Prapainainar, Kandis Sudsakorn, Yu-Kaung Chang, Anusorn Seubsai
更新时间: 2026-04-05
摘要: Thailand generates large amounts of agricultural residues, particularly pineapple leaves (PAL), which are often underutilized. In this study, pineapple leaf–derived biochar (PALC) was developed as an efficient hydrogen sulfide (H2S) adsorbent via FeCl3 pretreatment and pyrolysis under oxygen-free conditions at 400–800°C, with PAL-to-Fe mass ratios of 0.5–3. The adsorption performance was governed by pore structure and iron species, both influenced by pyrolysis temperature and Fe loading. The optimal material, 2Fe/PALC600, dominated by Fe3O4, achieved the highest adsorption capacity of 380.1 ± 15.4 mg H2S g−1 under 40%RH conditions. While humidity enhanced H2S removal, the presence of 40%v/v CO2 significantly suppressed performance due to competitive surface physisorption. X-ray photoelectron spectroscopy (XPS) analysis revealed transformations of Fe species on the biochar surface before and after H2S exposure, and density functional theory (DFT) calculations provided further insights into the adsorption mechanism. These findings highlight the strong potential of Fe-modified PAL-derived biochar as a sustainable and cost-effective material for gas purification, while also valorizing agricultural waste.

60. 题目: Novel CaO2-Magnetic Biochar for Synergistic Recovery of Inorganic and Organic Phosphorus from Water: Mechanisms and Potential for Agricultural Use
文章编号: N26040509
期刊: Journal of Environmental Chemical Engineering
作者: Miaoqu Wang, Chuchu Feng, Jiawei Hou, Kuok Ho Daniel Tang, Tao Sun, Ronghua Li
更新时间: 2026-04-05
摘要: Recovering phosphorus (P) from wastewater can reduce non-point source pollution and alleviate phosphate fertilizer resource shortage. This study prepared a novel CaO2-magnetic biochar (CaMC) from wheat straw via a pyrolysis-precipitation integrated method to capture phytic acid (IP6) and inorganic phosphate (Pi) from solution and livestock wastewater, and its agronomic benefits were tested through wheat pot experiments with microbial community analysis. Maximum capture capacities of CaMC were demonstrated to be 294.2 and 133.1 mg g−1 for Pi (2248.30 mg/L→1512.80 mg/L) and IP6. The pseudo-second-order kinetics, intra-particle diffusion model, and Langmuir model depicted the adsorptive capture process best. Pi was captured mainly through electrostatic attraction and precipitation of Ca5(PO4)3OH and Fe3(PO4)2(OH)2, whereas IP6 removal was first oxidized to Pi via Fenton-like reactions and then adsorbed in the same way as Pi. In addition, the P capture capacity of CaMC reached up to 6.46 mg g−1 in the treatment of real livestock wastewater. Percent adsorption was 27.48% for total P, 22.41% for Pi (76.53 mg/L→59.38 mg/L), and 60.87% for organic P by CaMC. In wheat pot experiments, CaMC-P enhanced both total and available P levels in the soil compared to untreated soil and fertilizer controls. The addition of CaMC-P in soil resulted in a 14% increase in plant dry weight relative to the untreated control. Microbial analysis revealed an increased relative abundance of phosphate-solubilizing microorganisms (Mortierella and Pseudomonas) in soils treated with CaMC-P. These findings conclude that CaMC is an excellent adsorbent for P recovery in wastewater and for enhancing soil fertility.