Environmental Research最新文献_第7页

Letter to the editor: The relevance of mercury studies to fish consumption during pregnancy. 致编辑的信：汞研究与怀孕期间食用鱼类的相关性。

IF 7.7 2区环境科学与生态学

Environmental Research Pub Date : 2025-07-24 DOI: 10.1016/j.envres.2025.122346

Philip Spiller, Gary J Myers

引用次数: 0

Environmental justice in France: Analysis of the association between exposure to environmental pollution and social deprivation 法国的环境正义：暴露于环境污染与社会剥夺的关系分析。

IF 7.7 2区环境科学与生态学

Environmental Research Pub Date : 2025-07-23 DOI: 10.1016/j.envres.2025.122434

Khadidiatou Diallo , Pauline Pouchin , Lucie Adélaïde , Johanna Lepeule , Ludivine Launay , Guy Launoy , Joséphine Bryere

{"title":"Environmental justice in France: Analysis of the association between exposure to environmental pollution and social deprivation","authors":"Khadidiatou Diallo , Pauline Pouchin , Lucie Adélaïde , Johanna Lepeule , Ludivine Launay , Guy Launoy , Joséphine Bryere","doi":"10.1016/j.envres.2025.122434","DOIUrl":"10.1016/j.envres.2025.122434","url":null,"abstract":"<div><h3>Background</h3><div>Some studies on environmental justice have demonstrated inequalities in pollution exposure based on socioeconomic gradients. However, French studies are limited to the local level, and showed varied associations between environmental pollution and social deprivation.</div></div><div><h3>Methods</h3><div>This study analysed the association between exposure to environmental pollution and social deprivation on a fine scale in France. Indicators for proximity to polluted sites and soils, and the number of days of overexposure to fine particles (PM<sub>10</sub>, PM<sub>2.5</sub>) and nitrogen dioxide (NO<sub>2</sub>), according to World Health Organisation (WHO) guidelines (2021), were calculated for each geographical unit (IRIS) in 2021. Social deprivation levels were measured using the French version of the European Deprivation Index (EDI) in 2017. Relationships between environmental pollution and deprivation were assessed using a conditional spatial autoregressive Poisson model.</div></div><div><h3>Findings</h3><div>IRIS in EDI quintiles 4 and 5 (the most deprived) were 2·005 (95 % CI: 1·892–2·125) and 1·991 (95 % CI: 1·873–2·117) times more likely to have a higher number of polluted sites and soils compared with IRIS in quintile 1 (the least deprived). Air pollution showed linear associations with risks of overexposure to PM<sub>10</sub>, PM<sub>2.5</sub>, and NO<sub>2</sub>, with relative risks of 1·087 (1·082–1·093), 1·027 (1·025–1·029), and 1·013 (1·011–1·016), respectively, in the most deprived quintile.</div></div><div><h3>Interpretation</h3><div>This study highlights the compounding effects of environmental and social inequities in France, underscoring the need for targeted interventions to reduce disparities in pollution exposure and associated health risks.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"285 ","pages":"Article 122434"},"PeriodicalIF":7.7,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144717167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring the photocatalytic performance of chitosan-supported WS2/NiS2 p-n junction nanocomposite toward the degradation of diclofenac and direct yellow 12 探讨壳聚糖负载WS2/NiS2 p-n结纳米复合材料降解双氯芬酸和直接黄12的光催化性能。

IF 7.7 2区环境科学与生态学

Environmental Research Pub Date : 2025-07-23 DOI: 10.1016/j.envres.2025.122429

S. Sowndharya, S. Anu Ratthika, S. Meenakshi

{"title":"Exploring the photocatalytic performance of chitosan-supported WS2/NiS2 p-n junction nanocomposite toward the degradation of diclofenac and direct yellow 12","authors":"S. Sowndharya, S. Anu Ratthika, S. Meenakshi","doi":"10.1016/j.envres.2025.122429","DOIUrl":"10.1016/j.envres.2025.122429","url":null,"abstract":"<div><div>In this study, WS<sub>2</sub> and NiS<sub>2</sub> semiconductors were loaded on the chitosan surface to produce WS<sub>2</sub>/NiS<sub>2</sub>@CS (WNC) nanocomposite and used for the effective photodegradation of diclofenac (DCF) and direct yellow 12 (DY) under visible light irradiation. The n-type semiconductor WS<sub>2</sub> and p-type NiS<sub>2</sub> form a p-n junction via a W-S-Ni bond, creating an internal electric field that promotes charge transfer and improves separation efficiency. The composite was characterized using FTIR, XRD, SEM, EDX, TEM, XPS, PL, TGA, BET and UV-DRS analyses. Moreover, the optimal dosage of 50 mg demonstrated better photocatalytic activity for the breakdown of DCF and DY, with pollutant concentrations at 50 mg/L and pH 6, achieving 86 % and 94 %, respectively, in 40 min of visible light irradiation. By combining the p-n junction with chitosan, the photodegradation performance was notably enhanced due to improved charge separation and adsorption of pollutant molecules. One of the main players in photodegradation was h<sup>+</sup>, <sup>•</sup>O<sub>2</sub><sup>−</sup>, and <sup>•</sup>OH radicals. The photodegradation pathway was also examined using LC-MS analysis, and a potential mechanism was suggested. Also, the toxicity assessment was performed.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"285 ","pages":"Article 122429"},"PeriodicalIF":7.7,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144717168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Removing macromolecular organic matter from biogas slurry prior to its application reduces organic N leaching and soil N2O emissions 在施用前从沼液中去除大分子有机物可以减少有机氮的浸出和土壤N2O的排放

IF 7.7 2区环境科学与生态学

Environmental Research Pub Date : 2025-07-23 DOI: 10.1016/j.envres.2025.122427

Fanjing Kong , Jingcong Gao , Zhimin Yang , Xixi Li , Yongjiang Zhang , Yucheng Chen

{"title":"Removing macromolecular organic matter from biogas slurry prior to its application reduces organic N leaching and soil N2O emissions","authors":"Fanjing Kong , Jingcong Gao , Zhimin Yang , Xixi Li , Yongjiang Zhang , Yucheng Chen","doi":"10.1016/j.envres.2025.122427","DOIUrl":"10.1016/j.envres.2025.122427","url":null,"abstract":"<div><div>Biogas slurry is an organic fertilizer with a low C/N ratio and a high water content. It can promote soil nitrous oxide (N<sub>2</sub>O) emissions and the leaching of small-molecule organic N compounds. In this study, membrane micro- and ultrafiltration were performed to separate organic matter from biogas slurry. The effects of the application of biogas slurry with organic matter compounds of different sizes on soil N<sub>2</sub>O emissions and N leaching were observed via simulating leaching through a 30-cm-high soil column over 62 days. In the treatment with filtrated biogas slurry (BS-F), the total N<sub>2</sub>O emissions and dissolved organic N leaching were significantly increased by 63.74 % and 153.85 %, respectively, over the experimental period compared to the mineral fertilizer treatment (MF). In contrast, the removal of particulate organic matter and large-molecular-weight humic substance from the original biogas slurry (BS-U) resulted in a 30.87 % reduction in soil N<sub>2</sub>O emissions and a 30.30 % reduction in dissolved organic N leaching, along with a 90.75 % increase in the soil microbial biomass nitrogen (MBN) content. The relative abundances of the genera <em>Methyloversatilis</em> (26.05 %) and <em>Thauera</em> (2.41 %) were higher in the BS-U treatment, whereas those of the functional genes <em>narG/H</em> and <em>nirK/S</em>, involved in denitrification, were lower. The relative abundance of the functional gene <em>nifD</em>, which plays a role in N fixation, was higher. The removal of large-molecular-weight (>100 kDa) organic substances from biogas slurry can reduce soil N<sub>2</sub>O emissions by impeding denitrification and facilitating other N reduction pathways. Our study provides a theoretical foundation for enhancing the environmental sustainability of biogas slurry in agricultural practices.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"285 ","pages":"Article 122427"},"PeriodicalIF":7.7,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144711355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparison of phosphorus transformation and microbial functional potential in aerobic and facultative composting of livestock and poultry manure 畜禽粪便好氧和兼性堆肥中磷转化和微生物功能势的比较

IF 7.7 2区环境科学与生态学

Environmental Research Pub Date : 2025-07-23 DOI: 10.1016/j.envres.2025.122425

Hongfang Ma , Wenzu Liu , Jun Li , Yuquan Wei , Yabin Zhan , Kaiyan Tang , Yifan Zhang , Ji Li , Zimin Wei

{"title":"Comparison of phosphorus transformation and microbial functional potential in aerobic and facultative composting of livestock and poultry manure","authors":"Hongfang Ma , Wenzu Liu , Jun Li , Yuquan Wei , Yabin Zhan , Kaiyan Tang , Yifan Zhang , Ji Li , Zimin Wei","doi":"10.1016/j.envres.2025.122425","DOIUrl":"10.1016/j.envres.2025.122425","url":null,"abstract":"<div><div>This study compared phosphorus (P) transformation, microbial succession, and functional gene dynamics during facultative and aerobic composting of pig and chicken manures, using 16S rRNA sequencing and PICRUSt2-based functional prediction. The results showed that, compared to facultative composting, aerobic composting increased thermophilic-phase temperature, reduced electrical conductivity, and improved the germination index (GI), indicating better maturity and lower phytotoxicity. Aerobic composting significantly enhanced total P (TP) accumulation (Pig manure, <em>p</em> < 0.001; Chicken manure, <em>p</em> < 0.05) and plant-available fractions (H<sub>2</sub>O-P and NaHCO<sub>3</sub>-P), whereas facultative composting favored the formation of more stable, less bioavailable fractions (NaOH-P and HCl-P). Aerobic treatments also induced more dynamic microbial shifts, complex networks, and higher expression of key genes (<em>phoA</em>, <em>PHO</em>, <em>gcd</em>, <em>mdh</em>), whereas facultative conditions upregulated high-affinity phosphate transporter genes (<em>pstA</em>, <em>pstB</em>, <em>pstC</em>). Correlation analysis revealed that P-cycling functional genes were closely associated with GI, TP, and labile P fractions, with stronger microbe–environment–function coupling observed under aerobic composting. These findings highlight mechanistic differences in P mobilization between facultative and aerobic treatments, which provide insights for optimizing manure composting for enhanced P recovery.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"285 ","pages":"Article 122425"},"PeriodicalIF":7.7,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144702548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cumulative Effects of Sulfamethoxazole and Its Metabolite on Nitrogen Reduction and Antibiotic Resistance in Constructed Wetlands: Microbial Mechanisms and Ecological Risks. 磺胺甲恶唑及其代谢物对人工湿地氮还原和抗生素耐药性的累积效应：微生物机制和生态风险

IF 7.7 2区环境科学与生态学

Environmental Research Pub Date : 2025-07-23 DOI: 10.1016/j.envres.2025.122426

Weihang Zhang, Aomei Guan, Weixiao Qi, Xiaoying Mu, Chengzhi Hu, Jiuhui Qu

{"title":"Cumulative Effects of Sulfamethoxazole and Its Metabolite on Nitrogen Reduction and Antibiotic Resistance in Constructed Wetlands: Microbial Mechanisms and Ecological Risks.","authors":"Weihang Zhang, Aomei Guan, Weixiao Qi, Xiaoying Mu, Chengzhi Hu, Jiuhui Qu","doi":"10.1016/j.envres.2025.122426","DOIUrl":"https://doi.org/10.1016/j.envres.2025.122426","url":null,"abstract":"<p><p>Antibiotic residues in the tailwater of wastewater treatment plants (WWTPs) threaten nitrogen removal in constructed wetlands (CWs), yet the long-term impacts of fluctuating sulfamethoxazole (SMX) and its metabolite N-acetylsulfamethoxazole (N-SMX) remain unclear. Here, the dual effects of dynamic recovery in microbial nitrogen-removal functions and irreversible accumulation of antibiotic resistance genes (ARGs) under gradient SMX+N-SMX exposure (10-1000 μg·L<sup>-1</sup> with 30-day stepwise increments) in lab-scale CWs were systematically revealed. At ≤ 100 μg·L<sup>-1</sup>, denitrification and anammox rates could recover to baseline levels, whereas 1 mg·L<sup>-1</sup> exposure triggered a short-term surge and then cumulative inhibition of nitrogen reduction (e.g., denitrification rates was 34.7% lower than the controls even after the SMX+N-SMX concentration reduction). Notably, sulfonamide resistance genes (sul1/sul2) increased steadily over 180 days despite the decline in SMX+N-SMX exposure (from 1 mg·L<sup>-1</sup> to 10 μg·L<sup>-1</sup> from day 120 to day 180), probably driven by horizontal gene transfer. Microbial analysis identified Burkholderia and Anaerolineales as dual-functional taxa linking nitrogen metabolism with ARGs propagation. Furthermore, sustained exposure suppressed the expression of denitrification genes (narG/nirK) of Methylotenera, despite its role in degrading SMX/N-SMX. These findings highlight a critical threshold: exposures < 100 μg·L<sup>-1</sup> allow the functional recovery of nitrogen reduction, but ≥ 1 mg·L<sup>-1</sup> induces irreversible ARGs enrichment and disrupts microbial nitrogen cycling. This study provides mechanistic insights into the ecological risks of antibiotic fluctuations, advocating stricter control of high-concentration SMX/N-SMX in WWTP tailwater to mitigate the dissemination of resistance genes.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":" ","pages":"122426"},"PeriodicalIF":7.7,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144717166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Aeration-driven peroxymonosulfate piezoactivation by PVDF-BTO composite membrane for the effective elimination of antibiotic resistance genes 曝气驱动过氧单硫酸盐PVDF-BTO复合膜的压电活化有效消除抗生素耐药基因

IF 7.7 2区环境科学与生态学

Environmental Research Pub Date : 2025-07-23 DOI: 10.1016/j.envres.2025.122430

Ling Yu , Mengxiao Liu , Lingling Shen , Da Chen , Yang Yu

{"title":"Aeration-driven peroxymonosulfate piezoactivation by PVDF-BTO composite membrane for the effective elimination of antibiotic resistance genes","authors":"Ling Yu , Mengxiao Liu , Lingling Shen , Da Chen , Yang Yu","doi":"10.1016/j.envres.2025.122430","DOIUrl":"10.1016/j.envres.2025.122430","url":null,"abstract":"<div><div>With the widespread use of antibiotics, the distribution of antibiotic resistance genes (ARGs) in the aquatic environment has become a globally environmental issue. However, traditional disinfection techniques are generally ineffective in the ARGs elimination. In this study, A piezocatalysis nanofibrous membrane was facilely fabricated by incorporating BaTiO<sub>3</sub> (BTO) nanoparticles into polyvinylidene fluoride (PVDF) nanofibers via electrospinning approach. A novel aeration-driven peroxymonosulfate (PMS) piezoactivation system using PVDF-BTO piezoelectric membrane was developed to effectively eliminate ARGs from water. Under the external forces generated by aeration or periodic hydraulic pressure, the piezocatalytic PVDF-BTO membrane can efficiently remove 5.6-log ARGs under optimal conditions. Radical quenching and quantitative experiments confirmed the participation of singlet oxygen (<sup>1</sup>O<sub>2</sub>), hydroxyl radical (HO•), sulfate radical (SO<sub>4</sub><sup>•−</sup>) and superoxide radical (•O<sub>2</sub><sup>−</sup>) in the ARGs elimination process. Furthermore, the nanofibrous membrane exhibited excellent reusability, achieving a stable ARGs elimination efficiency in the tested five-cycle experiments. This study provides an attracting ARGs elimination method that could be simply integrated into the current membrane-based water treatment systems.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"285 ","pages":"Article 122430"},"PeriodicalIF":7.7,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144711451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microplastic contamination in waterbirds and their habitats: evidence from little egrets (Egretta garzetta) in tropical rice fields 水鸟栖息地中的微塑料污染：来自热带稻田小白鹭（Egretta garzetta）的证据

IF 7.7 2区环境科学与生态学

Environmental Research Pub Date : 2025-07-23 DOI: 10.1016/j.envres.2025.122376

Han-xun Qiu , Chuan-biao Xu , Xin Huang , Xiang-yin Wei , Zi-lin Pang , Lan-fang Du , Li Jiang , Ji-liang Zhang

{"title":"Microplastic contamination in waterbirds and their habitats: evidence from little egrets (Egretta garzetta) in tropical rice fields","authors":"Han-xun Qiu , Chuan-biao Xu , Xin Huang , Xiang-yin Wei , Zi-lin Pang , Lan-fang Du , Li Jiang , Ji-liang Zhang","doi":"10.1016/j.envres.2025.122376","DOIUrl":"10.1016/j.envres.2025.122376","url":null,"abstract":"<div><div>Microplastic (MP) pollution in rice fields has become a major environmental threat. Birds often serve as indicators of environmental pollution, and feathers are the most commonly used indicator because they can be sampled non-invasively. However, studies examining the ingestion of plastic by waterbirds in tropical rice fields are lacking. Therefore, to explore the potential threat of MP pollution on waterbirds inhabiting rice fields and evaluate the potential role of bird feathers in assessing MP pollution, we investigated MP accumulation in sediment, water, feather, and feces samples collected from different nesting sites (Wuji Village and Chongwei Village) of little egrets (<em>Egretta garzetta</em>) on Hainan Island, China, and evaluated possible correlations among feathers, feces, and environment. MPs were significantly more abundant in sediment, feather, and feces samples from Wuji Village than in those from Chongwei Village, suggesting the importance of habitat contamination as an exposure source for MP ingestion. MPs were more abundant on feathers than in feces based on the number of MP pieces per gram of sample. The identified MPs were predominantly small and fragment-shaped. Polyethylene and polypropylene were the most abundant polymer types, indicating that anthropogenic activities were the likely source of MPs. Correlation analysis revealed highly significant correlations between feathers and habitats in terms of MP characteristics. The results indicate that waterbirds in rice fields are seriously exposed to MP contamination and highlight the potential role of feathers as biomonitors and vectors of MPs in natural environments.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"285 ","pages":"Article 122376"},"PeriodicalIF":7.7,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144705927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sources and geographic differences in air releases of benzene in the United States 美国空气中苯释放的来源和地理差异。

IF 7.7 2区环境科学与生态学

Environmental Research Pub Date : 2025-07-23 DOI: 10.1016/j.envres.2025.122401

Najm Alsadat Madani , Pasquale N. Russo , David O. Carpenter

{"title":"Sources and geographic differences in air releases of benzene in the United States","authors":"Najm Alsadat Madani , Pasquale N. Russo , David O. Carpenter","doi":"10.1016/j.envres.2025.122401","DOIUrl":"10.1016/j.envres.2025.122401","url":null,"abstract":"<div><div>The National Emissions Inventory (NEI) presents the most comprehensive outdoor air pollution data available in the US. It includes releases of the criteria air pollutants and volatile organic compounds and distinguishes releases from four different sources: road (vehicles), non-road (farm equipment, lawn mowers, etc.), point (industries, power plants, etc.), and non-point (gas stations, oil, and gas wells, etc.). We show the distribution of releases of benzene by these categories in different states in the U.S. A goal is to determine relative releases from oil and gas extraction as compared to those from vehicles and large point sources. We find that road, non-road, and non-point sources are approximately equal in most states without oil and gas extraction, while point sources are relatively minor contributors. In states with oil and gas extraction, the non-point sources predominate, while in urban areas, on-road sources are dominant. Benzene is a known human carcinogen and has other adverse effects on the hematopoietic, immune, and other systems. These risks are particularly elevated in those individuals working in or living near sites of oil and gas extraction and in urban areas with high vehicle traffic.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"285 ","pages":"Article 122401"},"PeriodicalIF":7.7,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144705931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of particle size and biofilm pre-coating on phosphorus adsorption and capping performance by ZnAlLa-NO3-LDHs@quartz sand for internal phosphorus control in three lake sediments 粒径和生物膜预涂覆对ZnAlLa-NO3-LDHs@quartz砂在三个湖泊沉积物中磷吸附和封盖性能的影响

IF 7.7 2区环境科学与生态学

Environmental Research Pub Date : 2025-07-23 DOI: 10.1016/j.envres.2025.122420

Rao Qi , Shiyu Chen , Chonghao Wang , Xiuyuan Fan , Yafen Wang

{"title":"Effects of particle size and biofilm pre-coating on phosphorus adsorption and capping performance by ZnAlLa-NO3-LDHs@quartz sand for internal phosphorus control in three lake sediments","authors":"Rao Qi , Shiyu Chen , Chonghao Wang , Xiuyuan Fan , Yafen Wang","doi":"10.1016/j.envres.2025.122420","DOIUrl":"10.1016/j.envres.2025.122420","url":null,"abstract":"<div><div>This study systematically evaluates phosphorus (P) adsorption and capping performance of core-shell ZnAlLa-NO<sub>3</sub>-layered double hydroxides (LDHs)@quartz sand (QS) materials, focusing on the influence of particle size and biofilm pre-coating in their practical application for lake management. In 24 h adsorption experiments (adsorbent dosage: 1.0 g/L), 200 mesh LDHs@QS (QSL) exhibited a significantly higher P adsorption capacity (Q<sub>m</sub>, 9.58 mg/g) than 20 mesh QSL (2.31 mg/g), as derived from the Langmuir model. Fourier transform infrared spectra (FTIR) and X-ray photoelectron spectroscopy (XPS) confirmed that phosphate adsorption by LDHs involved inner-sphere complexation, ion exchange, and chemical adsorption. In a 14 d capping experiment, P release reduction was primarily determined by material type rather than particle size or initial sediment P levels. Specifically, LDH-based materials, with or without biofilm (QSLB: 88.3% and QSL: 91.3%), significantly outperformed the original QS (70.4%). Total P flux even reversed to negative values, particularly in the QSLB treatments, which exhibited the lowest proportion of loosely bound P (1.8%), compared to 3.5% for QSL and 13.1% for QS. Principal component analysis revealed that QSLB had minimal disturbance to overlying water and sediment properties relative to the blank control, highlighting its environmental compatibility. Moreover, nitrate-intercalated LDHs functioned as a slow-release oxidant, enhancing the oxidation-reduction potential (ORP) of overlying water, demonstrating their multifunctional potential for long-term internal P control. This study lays a groundwork for customizing core-shell LDH-based capping materials for efficient and environmentally friendly remediation of eutrophic water bodies.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"285 ","pages":"Article 122420"},"PeriodicalIF":7.7,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144711354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0