Journal of Environmental Sciences-china最新文献

{"title":"Construction of Brönsted sites on pyrite surface via plasma technology for efficient hydrolysis of microcystins-LR","authors":"Qing Zhang ,&nbsp;Yuting He ,&nbsp;Jing Zhang ,&nbsp;Yadong Li ,&nbsp;Yanfen Fang ,&nbsp;Yunzhi Tan","doi":"10.1016/j.jes.2025.01.016","DOIUrl":"10.1016/j.jes.2025.01.016","url":null,"abstract":"<div><div>Enhancing the catalytic hydrolysis efficiency of microcystins (MCs) at ambient temperature has been a persistent challenge in water treatment. We employed N₂/low-temperature plasma technology to modify the surface of natural pyrites (NP), and the resulting nitrogen-modified pyrites (NP_N) with a nanorod structure and new Fe-N_x sites are more efficient for the hydrolysis of microcystins-LR (MC-LR). Kinetic experiments revealed that NP_N exhibited significantly higher hydrolysis activity (<em>k</em>_obs = 0.1471 h⁻¹) than NP (0.0914 h⁻¹). Liquid chromatography-mass spectrometry (LC/MS) for the intermediates produced by hydrolyzing MC-LR, in situ attenuated total reflectance Fourier transform infrared spectroscopy (in situ ATR-FTIR) and X-ray photoelectron spectroscopy (XPS) analysis unfolded that the Fe and N atoms of Fe-N_x sites on the surface act of NP_N as Lewis acid and Brönsted basic respectively, selectively breaking amide bond on MC-LR molecule. This study demonstrates the effectiveness of plasma technology in modifying mineral materials to enhance their catalytic activity, providing a new method for eliminating MCs in practical water treatment.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 622-632"},"PeriodicalIF":5.9,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143486612","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}

{"title":"Distribution and imbalance of basic research funding in environmental chemistry in China","authors":"Weiyi Wang ,&nbsp;Qian Liu ,&nbsp;Guibin Jiang ,&nbsp;Qiankun Zhuang","doi":"10.1016/j.jes.2025.01.017","DOIUrl":"10.1016/j.jes.2025.01.017","url":null,"abstract":"<div><div>This study investigates the distribution and imbalances of research funding in the field of Environmental Chemistry, utilizing application and funding data from the National Natural Science Foundation of China (NSFC) over the past decade. The findings reveal significant regional disparities, with Eastern regions receiving over 70 % of the national funding, while the Northeast accounts for only 4 % to 6.5 %. Additionally, the analysis shows notable differences in funding allocation among various research institutions, with a substantial portion of funds concentrated in a few leading institutions, leading to inequities across different types and levels of organizations. The impact of applicant gender on funding disparities is relatively minor; although female applicants have a slightly lower funding rate, the concentration of funds is marginally higher among females. Furthermore, the study highlights that key projects and talent-oriented initiatives, due to their significant funding concentration, exacerbate the existing imbalances. Overall, this research provides valuable insights for optimizing funding policies and advocates for a more equitable distribution of resources in Environmental Chemistry research, addressing the identified disparities.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 267-277"},"PeriodicalIF":5.9,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158426","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}

{"title":"Insight into soot oxidation performance and kinetics of novel Ce/La modified Cs-V based non-noble metal catalysts","authors":"Yajuan Chen ,&nbsp;Diming Lou ,&nbsp;Yunhua Zhang ,&nbsp;Liang Fang ,&nbsp;Dongxia Yang","doi":"10.1016/j.jes.2025.01.018","DOIUrl":"10.1016/j.jes.2025.01.018","url":null,"abstract":"<div><div>The catalytic diesel particulate filter (CDPF) is the most widely used after-treatment device for controlling diesel engine soot emissions. The development of cost-effective catalysts is crucial for diesel engines to comply with future ultra-low emission regulations. This paper studies a new type of Ce/La modified Cs-V non-noble metal CDPF catalyst. Three test catalysts (Cs-V, Cs-V-5 %Ce, and Cs-V-5 %La) were formulated to explore the physical properties, activity, and sulfur resistance through XRD, SEM, XPS, and TPO tests. And TGA tests with different catalyst-to-soot mass ratios were designed to analyze the reaction kinetics. The results show that the soot oxidation process is divided into three stages: slow oxidation, rapid oxidation, and soot burnout. SEM and XRD results show that, compared with Ce doping, La-doped catalysts have less damage to the microstructure of the first active component, Cs₂V₄O₁₁. XPS results show that the introduction of Ce and La is beneficial to the formation of oxygen vacancies and lattice distortion, increasing the proportion of active oxygen species, thereby improving the soot oxidation activity, among which La-doped active oxygen species have the highest proportion (94 %). And the Cs-V-5 %La catalyst has the best effect on improving the soot conversion of the three stages. The fresh state has the best low-temperature activity index, the lowest characteristic temperature (<em>T</em>₅₀ of 374 °C) and activation energy (115.01 kJ/mol), and excellent sulfur resistance. The soot conversion and oxidation speed of the three stages decreases, duration lengthens, and activation energy increases by more than 100 kJ/mol as catalyst-to-soot mass ratios decrease.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 658-672"},"PeriodicalIF":5.9,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143509227","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}

{"title":"Investigation into the degradation of 2,4,6-trichlorophenol utilizing a three-dimensional electrocatalytic reactor filled with fluorine-doped copper-carbon particle electrodes","authors":"Hongrui Zhang ,&nbsp;Wenyu Huang ,&nbsp;Hainong Song ,&nbsp;Hanhui Yan ,&nbsp;Jia Zhang ,&nbsp;Fang Zhong ,&nbsp;Huilan Li","doi":"10.1016/j.jes.2025.01.019","DOIUrl":"10.1016/j.jes.2025.01.019","url":null,"abstract":"<div><div>The three-dimensional particle electrode system exhibits significant potential for application in the treatment of wastewater. Nonetheless, the advancement of effective granular electrodes characterized by elevated catalytic activity and minimal energy consumption continues to pose a significant challenge. In this research, Fluorine-doped copper-carbon (F/Cu-GAC) particle electrodes were effectively synthesized through an impregnation-calcination technique, utilizing granular activated carbon as the carrier and fluorine-doped modified copper oxides as the catalytic agents. The particle electrodes were subsequently utilized to promote the degradation of 2,4,6-trichlorophenol (2,4,6-TCP) in a three-dimensional electrocatalytic reactor (3DER). The F/Cu-GAC particle electrodes were polarized under the action of electric field, which promoted the heterogeneous Fenton-like reaction in which H₂O₂ generated by two-electron oxygen reduction reaction (2e-ORR) of O₂ was catalytically decomposed to •OH. The 3DER equipped with F/Cu-GAC particle electrodes showed 100% removal of 2,4,6-TCP and 79.24% removal of TOC with a specific energy consumption (EC) of approximately 0.019 kWh/g·COD after 2 h of operation. The F/Cu-GAC particle electrodes exhibited an overpotential of 0.38 V and an electrochemically active surface area (ECSA) of 715 cm², as determined through linear sweep voltammetry (LSV) and cyclic voltammetry (CV) assessments. These findings suggest a high level of electrocatalytic performance. Furthermore, the catalytic mechanism of the 3DER equipped with F/Cu-GAC particle electrodes was elucidated through the application of X-ray photoelectron spectroscopy (XPS), electron spin resonance (ESR), and active species capture experiments. This investigation offers a novel approach for the effective degradation of 2,4,6-TCP.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 701-719"},"PeriodicalIF":5.9,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143509229","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}

{"title":"Crystallization at the hexadecane/water interface observed under acoustic levitation","authors":"Smaragda-Maria Argyri,&nbsp;Axel Stark,&nbsp;Viktor Eriksson,&nbsp;Lars Evenäs,&nbsp;Anna Martinelli,&nbsp;Romain Bordes","doi":"10.1016/j.jes.2025.01.013","DOIUrl":"10.1016/j.jes.2025.01.013","url":null,"abstract":"<div><div>Alkanes are present in the atmosphere, commonly in the form of aerosols, and can thus interact with water droplets, leading to the formation of new interfaces. Yet, in the study of these interactions, traditional experimental methods often rely on the presence of sample containers, which can interfere with the observations. Acoustic levitation is a technique which allows the manipulation of samples in the microliter regime in a contact-free manner. Hence, interfacial phenomena can be studied without the presence of external surfaces, mimicking atmospheric conditions. Herein, we acoustically levitated a droplet of water in contact with a droplet of hexadecane and observed interfacial crystallization at the hexadecane/water interface that propagated to the entire droplet of hexadecane. It was found that the crystallization occurred up to 3 K above the melting temperature of hexadecane, and at a relative humidity below 30 %. Moreover, the volume ratio between water and hexadecane influenced the fraction of crystallized surface area; for a hexadecane:water ratio above 1:2 full surface crystallization occurred. Combining acoustic levitation with Raman spectroscopy allowed the characterization of the phase transition in real time, demonstrating the existence of a solid crystal of alkane upon water evaporation. This study provides insights into the process of interfacial crystallization of hexadecane and demonstrates the suitability of acoustic levitation to study contact-free interfacial phenomena between two immiscible liquids.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"158 ","pages":"Pages 197-206"},"PeriodicalIF":5.9,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144270191","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}

{"title":"Freshwater macrophyte type (macroalgae versus phanerogams) mainly determines detritus-derived greenhouse gases production: A microcosm experiment","authors":"Eric Puche ,&nbsp;Belén Roger ,&nbsp;Mariana Vargas-Sánchez ,&nbsp;Salvador Sánchez-Carrillo ,&nbsp;María A. Rodrigo","doi":"10.1016/j.jes.2025.01.015","DOIUrl":"10.1016/j.jes.2025.01.015","url":null,"abstract":"<div><div>Freshwater ecosystems are crucial in the global emissions of greenhouse gases (GHGs) such as CH₄. Macrophytes are the main organic matter (i.e., detritus) supplier to the sediment of these systems, thus controlling CH₄ production. However, species-specific differences (structure and composition) may determine contrasting patterns of detritus transformation into CH₄. Furthermore, eutrophication can affect the degradation and, consequently, CH₄ production. We performed a 64-day microcosm experiment with anoxic incubations of detritus from seven phylogenetically different macrophytes (two charophytes, filamentous algae –<em>Spirogyra, Cladophora</em>–, three submerged plants and an amphibious one), under two trophic conditions (oligo- versus eutrophic) and with/without sediment. We assessed the CH₄ and CO₂ production and the changes in the detritus quality at the end of the experiment. The ranking in the mean cumulative CH₄ production was: <em>Chara hispida</em> &gt; <em>Nitella hyalina</em> &gt; <em>Najas marina</em> ≈ <em>Teucrium scordium</em> &gt; <em>Stuckenia pectinata</em> ≈ <em>Myriophyllum spicatum</em> &gt; filamentous algae, and it was related to the detritus quality. GHGs maximum production rates were 1.6 (<em>N. marina</em>)-1.2 (<em>C. hispida</em>) mmol CH₄/(g OC·day) and 1.7 (<em>N. marina</em>)-1.5 (<em>C. hispida</em>) mmol CO₂/(g OC·day). The CO₂:CH₄ ratio was biased towards CO₂ during the first 10 days (average ratio of 200) and fell afterwards to about 1 for all macrophyte species and treatments. The sediment favored detritus decomposition (probably due to the “positive priming effect”), increasing GHGs production. The influence of nutrient enrichment was not evident. Delving into the macrophyte detritus quality-GHGs production relationship is needed to forecast the GHGs emissions in macrophyte-dominated systems.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"157 ","pages":"Pages 674-689"},"PeriodicalIF":5.9,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144115808","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}

{"title":"Cumulative effect of PM2.5 chemical components surpasses PM2.5 mass on hypertension in older adults: A China-based national analysis","authors":"Chen Chen ,&nbsp;Binbin Su ,&nbsp;Yunhe Wang ,&nbsp;Yihao Zhao ,&nbsp;Yutong Wu ,&nbsp;Jun Li ,&nbsp;Yanan Luo ,&nbsp;Xiaoying Zheng","doi":"10.1016/j.jes.2025.01.014","DOIUrl":"10.1016/j.jes.2025.01.014","url":null,"abstract":"<div><div>The specific and cumulative effects of fine particulate matter (PM_2.5) components on hypertension remain less defined, notably in susceptible older adults. This national study utilized a representative sample of 220,425 older adults in China, to scrutinize their relationship. Residential PM_2.5 and five chemical components (black carbon (BC), organic matter (OM), sulphate (SO₄²⁻), nitrate (NO₃⁻), and ammonium (NH₄⁺)) were estimated by the bilinear interpolation. Associations between PM_2.5 and five chemical components with hypertension were examined through two-stage logistic regression models, with population attributable fractions (PAFs) determined via counterfactual analysis. Elevated exposure to PM_2.5 and its components was generally linked to higher hypertension prevalence. With each interquartile range increase, the odds ratio (OR) of hypertension rose by 1.09 (95 % CI: 1.08–1.11) for NO₃⁻, 1.06 (95 % CI: 1.05–1.08) for NH₄⁺, 1.06 (95 % CI: 1.05–1.07) for OM, 1.05 (95 % CI: 1.04–1.06) for BC, and 1.06 (95 % CI: 1.04–1.07) for SO₄^2-. Notably, the cumulative impact of five PM_2.5 chemical components (OR: 1.13, 95 % CI: 1.12–1.13) was significantly greater than the effect of total PM_2.5 mass alone (OR: 1.04, 95 % CI: 1.03–1.05). Regarding PAFs, NO₃⁻ represented the strongest contribution to hypertension, followed by OM, NH₄⁺, SO₄²⁻, and BC. Furthermore, the effects were accentuated in low socio-economic population. These findings underline that using total PM_2.5 as a surrogate marker may underestimate the comprehensive impact of its chemical components, underscoring the necessity for targeted interventions to reduce emissions of specific PM_2.5 chemical constituents.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"157 ","pages":"Pages 782-792"},"PeriodicalIF":5.9,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144137923","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}

{"title":"Sorption behavior of trichloroethylene in arsenic contaminated soil: Batch experiment and mechanism insight","authors":"Wei Zhang,&nbsp;Zongcheng Yao,&nbsp;Mengting Li,&nbsp;Xueqi Zhang,&nbsp;Yuting Wang,&nbsp;Dongmei Zhou,&nbsp;Qiming Xian","doi":"10.1016/j.jes.2025.01.011","DOIUrl":"10.1016/j.jes.2025.01.011","url":null,"abstract":"<div><div>Co-contamination of chlorinated hydrocarbons and arsenic is frequently observed in the chemically contaminated sites and their surroundings in China. However, the interaction between these complex contaminants in soil remains is unclear. This study collected ten background soils with varying properties from various regions throughout China, and investigated the sorption and desorption process of trichloroethylene (TCE) in the exogenous arsenate (As(V)) contaminated soils. The results of the batch experiments demonstrated that TCE was rapidly adsorbed by soil organic matter (SOM). Both SOM and minerals contributed to the slow sorption equilibrium process. The sorption isotherms were linear, while the desorption isotherms were non-linear. In Heilongjiang (HLJ) soil, As(V) contamination increased the TCE sorption contribution of black carbon and decreased the contribution of minerals. During the aging process of As(V) in soils, SOM was replaced by AsO₄³⁻, which formed complexes with soil Fe/Al oxides, resulting in a significant increase in hydroxyl groups and hydrophilicity of the soil surface. This hindered the hydrophobic sorption of TCE. Additionally, As(V) contamination affected soil geotechnical properties, and the As-cations precipitation could block the sorption micropores. The collective results of these processes caused a reduction in the sorption of TCE on the majority of As(V)-contaminated soils (702–5854 mg/kg) in comparison to background soils (1194–6374 mg/kg). The systematic investigation of sorption-desorption behaviors of TCE in As(V)-contaminated soils will provide a scientific basis for the calculation of soil environmental capacity of heavy metal- organic combined contamination in the future.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"158 ","pages":"Pages 841-852"},"PeriodicalIF":5.9,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144631181","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}

{"title":"Reconstruction of the three-dimensional dissolved oxygen and its spatio-temporal variations in the Mediterranean Sea using machine learning","authors":"Guangsheng Liu ,&nbsp;Xiang Yu ,&nbsp;Jiahua Zhang ,&nbsp;Xiaopeng Wang ,&nbsp;Nuo Xu ,&nbsp;Shawkat Ali","doi":"10.1016/j.jes.2025.01.010","DOIUrl":"10.1016/j.jes.2025.01.010","url":null,"abstract":"<div><div>Oceanic dissolved oxygen (DO) concentration is crucial for assessing the status of marine ecosystems. Against the backdrop of global warming, DO shows a general decrease, posing a threat to the health of marine ecosystems. Therefore, there is an urgent need to develop advanced tools to characterize the spatio-temporal variations of three-dimensional (3D) DO. To address this challenge, this study introduces the Light Gradient Boosting Machine (LightGBM), combining satellite remote sensing and reanalysis data with Biogeochemical Argo data to accurately reconstruct the 3D DO structure in the Mediterranean Sea from 2010 to 2022. Various environmental parameters are incorporated as inputs, including spatio-temporal features, meteorological characteristics, and ocean color properties. The LightGBM model demonstrates excellent performance on the testing dataset with <em>R</em>² of 0.958. The modeled DO agrees better with in-situ measurements than products from numerical models. Using the Shapley Additive exPlanations method, the contributions of input features are assessed. Sea surface temperatures provide a correlation with DO at the sea surface, while spatial coordinates supplement the view of the ocean interior. Based on the reconstructed 3D DO structure, we identify an oxygen minimum zone in the western Mediterranean that expands continuously, reaching depths of approximately 300–800 m. The western Mediterranean exhibits a significant declining trend. This study enhances marine environmental evidence by proposing a precise and cost-effective approach for reconstructing 3D DO, thereby offering insights into the dynamics of DO variations under changing climatic conditions.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"157 ","pages":"Pages 710-728"},"PeriodicalIF":5.9,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144124772","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}

{"title":"Response of abundant and rare microbial taxa to three iron-carbon composite amendments in metal-contaminated agricultural soil","authors":"Ting Yang ,&nbsp;Jiacan Li ,&nbsp;Ying Yuan ,&nbsp;Xin Zheng ,&nbsp;Yifei Liu ,&nbsp;Bing Zhang ,&nbsp;Tan Chen ,&nbsp;Jun Jin ,&nbsp;Linlan Zhuang","doi":"10.1016/j.jes.2025.01.009","DOIUrl":"10.1016/j.jes.2025.01.009","url":null,"abstract":"<div><div>Traditional studies of microbial succession under iron-carbon composite (Fe-C) amendment application have focused on the entire microbial community, with limited attention to the responses and ecological roles of abundant or rare taxa. Herein, a 90-day microcosm incubation was conducted to investigate the effects of three Fe-C amendments, including Fe₃O₄-modified biochar (FeC-B), ferrihydrite-natural humic acid (FeC-N), and ferrihydrite-synthetic humic-like acid (FeC-S), on distribution patterns, assembly processes, and ecological functions of both abundant and rare subcommunities. Our results showed that Fe-C amendments significantly affected the α-diversity of rare taxa, particularly under FeC-B treatment, with minimal impact on abundant taxa. Fe-C amendments also reshaped the community structures of both groups. Rare taxa, representing 63.9 % of Operational Taxonomic Unit (OTU) richness but only 1.6 % of total abundance, played a key role in community diversity and were more susceptible to Fe-C amendments. Certain rare taxa transitioned to abundant status, demonstrating their potential as a microbial seed bank. Abundant taxa were positioned more centrally within the networks, and Fe-C applications promoted cooperative interactions between abundant and rare species. Deterministic processes dominated the assembly of the rare subcommunity, while stochastic processes primarily influenced the abundant bacterial community. Fe-C amendments reduced community differentiation among rare taxa while increasing variability among abundant groups. Functional diversity of rare groups surpassed that of abundant groups, with notable enhancement in nitrogen cycling-related genes under Fe-C treatments. This study highlights the complementary roles of abundant and rare taxa in soil remediation, providing insights for optimizing remediation strategies.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"157 ","pages":""},"PeriodicalIF":5.9,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143918223","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}