Environmental Geochemistry and Health最新文献

{"title":"Speciation and bioavailability of potentially toxic element in soils and sediments of mining areas in Meiganga Adamawa plateau (Cameroon).","authors":"S Danala Danga, L Ekengele Nga, D Tiki, L E Mamdem, B Djangue Moustapha, B A Ibrahim, A Hamadou, J B Sounya, P C Ndi, D L Bitom","doi":"10.1007/s10653-025-02716-1","DOIUrl":"10.1007/s10653-025-02716-1","url":null,"abstract":"<p><p>Contamination by potentially toxic elements (PTEs) is a major environmental concern, especially in mining sites, given the often-increasing concentrations in soil and sediments. Under certain conditions, such contamination may expand beyond the mining area, posing risks to human health. This study investigates the environmental hazard associated with PTEs in soils and river sediments from the Meiganga gold district by evaluating their speciation and mobility. A total of 60 samples (48 soils and 12 sediments) were collected for total digestion analysis. Among these, 10 samples identified as contaminated with PTEs were selected for further speciation analysis using single and sequential (BCR) extraction methods, alongside SEM/EDS. The total concentration of Cr, Ni, Cu, Zn, As, Pb and Cd in the selected samples exceeded the average upper continental values. Cd and Zn exhibited the highest extraction rates (83.33% and 61% respectively), indicating high mobility and potential environmental risk, particularly due to their association with the acid-soluble fraction. In contrast, Cr, As, Cu, Ni and Pb were mainly bound to the residual and reducible fractions, indicating lower mobility and reduced environmental risk. In addition. SEM/EDS analysis confirmed strong associations between several PTEs (Cr, Ni, Pb, As and Zn) and Fe-Mn oxyhydroxides, which could release these elements under changing redox conditions. Both the enrichment factor and geo-accumulation index confirm significant contamination while the high mobility of several PTEs indicates considerable ecological risk. Therefore, ongoing monitoring and appropriate remediation measures are strongly recommended for the Meiganga gold district.</p>","PeriodicalId":11759,"journal":{"name":"Environmental Geochemistry and Health","volume":"47 9","pages":"398"},"PeriodicalIF":3.8,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144872045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Tracking soil health and potentially toxic elements (PTEs) across land-use types using physico-chemical, magnetic, and geochemical proxies: a case study from Manipal, Southwestern India.","authors":"Jai Vishnu Degvekar, Esha Ulhas Gadekar, O Darshana, Jagath Chand, Vadakkeveedu Narayan Amrish, Jithin Jose, K Priya, Santhosh Prabhu, Anish Kumar Warrier","doi":"10.1007/s10653-025-02665-9","DOIUrl":"10.1007/s10653-025-02665-9","url":null,"abstract":"<p><p>This study investigates spatial variations in soil quality across five distinct land-use types-forest, roadside, agricultural, industrial, and residential-in the Manipal region of southern India. Ten surface soil samples from each land-use category were analysed for physico-chemical properties, geochemical composition, and environmental magnetic parameters to evaluate soil degradation and identify potential pollution sources. Marked variations were observed in electrical conductivity, pH, and salinity, with industrial and roadside soils exhibiting elevated values indicative of anthropogenic impact. Concentrations of potentially toxic elements (PTEs), including Pb, Cr, Cu, and Zn, were significantly higher in roadside and industrial areas, frequently exceeding recommended safety thresholds. Environmental magnetic measurements, such as low-frequency magnetic susceptibility (χ_lf) and frequency-dependent susceptibility (χ_fd%), effectively differentiated between anthropogenic and pedogenic magnetic inputs. Principal Component Analysis (PCA) highlighted distinct contamination patterns and revealed strong correlations between magnetic parameters and PTE concentrations. Pollution indices-including the Pollution Load Index (PLI), Enrichment Factor (EF), and Contamination Factor (CF)-identified notable contamination in industrial soils (PLI > 1.3). Overall, the findings underscore increasing environmental pressures on soil systems in rapidly urbanizing regions and demonstrate the value of environmental magnetism as a cost-effective, non-destructive tool for early detection and long-term monitoring of soil pollution. These insights can inform sustainable land management strategies and guide policy frameworks aimed at safeguarding soil health and ecological resilience.</p>","PeriodicalId":11759,"journal":{"name":"Environmental Geochemistry and Health","volume":"47 9","pages":"397"},"PeriodicalIF":3.8,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12364988/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144872046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Transformation of ferrihydrite to hematite and goethite in the presence of various surfactants.","authors":"Lixia Yan, Zihe Ren","doi":"10.1007/s10653-025-02699-z","DOIUrl":"10.1007/s10653-025-02699-z","url":null,"abstract":"<p><p>The transformations of ferrihydrite (Fh) to more stable minerals (e.g., hematite (Hm) and goethite (Gt)) can be significantly affected by the co-existing substances. In this work, the widely used sodium dodecyl sulfonate (SDS), polyvinylpyrrolidone (PVP), and cetyltrimethylammonium bromide (CTAB) were respectively chosen as representatives of anionic, nonionic, and cationic surfactants to investigate the effects of surfactants on the transformation of Fh. X-ray diffraction and kinetics data showed that Hm was the dominant transformation product while Gt was the minority. All of the co-existing surfactants inhibited the transformation of Fh to more stable minerals. In addition, the transmission electron microscopy images revealed that the morphologies of the resulting products were evidently affected by the co-existing surfactants. Hm particles formed in the presence of SDS have larger size than those formed without surfactant. This phenomenon might be attributed to the factor that the adsorbed SDS facilitated the aggregation of Fh, forming large Hm particles. In addition, the products in the presence of PVP or CTAB were changed from rhombic particles to hexagonal or pentagon-like particles. In all, this study clarified the effects of three types of surfactants on the phase transformation of Fh, which can help us understand the effects of artificial chemicals on natural minerals.</p>","PeriodicalId":11759,"journal":{"name":"Environmental Geochemistry and Health","volume":"47 9","pages":"395"},"PeriodicalIF":3.8,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144872047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Antimony sources and mobilization in environmental matrices surrounding the world's largest Sb mine: evidence from mineralogy and Sb isotope signatures.","authors":"Taoran Shi, WenJing Guo, Guangyi Sun, Jining Li, Jin Ma, Min Sun, Yutong Ji, Chunfa Wu","doi":"10.1007/s10653-025-02711-6","DOIUrl":"10.1007/s10653-025-02711-6","url":null,"abstract":"<p><p>China produces 48.2% of global antimony (Sb) annually, of which approximately 80% was produced in Southwest China in 2023. The distribution of high-Sb geological background areas in China overlaps with that of karst landforms. The external causes of the exploitation and utilization of Sb resources and the internal causes of the special high geochemical background have led to Sb pollution in the natural ecosystems in this area. This study selected the Xikuangshan (XKS) Sb mine in Hunan Province, a typical Sb deposit in the karst areas of China, as an example to quantitatively identify pollution sources and influencing factors of Sb in the environment around the Sb mining area. Based on the TESCAN integrated mineral analyzer analysis, the major mineralogical components of the representational soil sample were quartz (59.80%), kaolinite (9.93%), calcite (6.08%), albite (3.41%), chlorite-clinochlore (2.89%), clay (1.99%), dolomite (1.81%), and hematite (Fe₂O₃)/magnetite (Fe₃O₄) (1.67%). Antimony was found to be mainly rich in Fe₂O₃/Fe₃O₄, nepheline (NaAlSiO₄), and minerals consisting of O-Al-Si or O-S-Fe in the soil. Based on microscopic X-ray fluorescence analysis, Sb showed similar in situ distribution and enrichment characteristics to those of Al, Fe, S, and Si. The characteristics of the Sb isotope of the environmental samples from the XKS Sb mine were measured for the first time. A large variation in δ¹²³Sb values and chemical species fractions of Sb in soil samples suggests that Sb in soils from different geographical location may have different origins or migration behaviors. The Sb isotope composition of soil can be divided into four endmembers: atmospheric deposition, tailing leaching, river water surface runoff, and rock oxidative weathering. The differences in hydrochemical types and Sb isotopic signatures among river waters indicate multiple sources and factors influencing Sb migration in different locations. The Sb in river water may have been partly influenced by rock leaching. Sweet potato exhibited a similar Sb isotopic signature (δ¹²³Sb = 0.24‰) with surrounding soil (δ¹²³Sb = 0.22‰), which demonstrated that the sweet potato absorbed Sb through contaminated soil to the root. Soil erosion and tailings are the major sources of Sb in street dust. A conceptual model was established to elucidate the pollution sources and the main geochemical processes affecting the mobilization of Sb in environmental matrices in the XKS mining area. This study provides a scientific basis for environmental quality assessment of Sb mining areas and establishment of an effective early warning system for Sb pollution in soil.</p>","PeriodicalId":11759,"journal":{"name":"Environmental Geochemistry and Health","volume":"47 9","pages":"396"},"PeriodicalIF":3.8,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144872042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Potential and degradation mechanism of sulfamethoxazole removal by the synergistic effect of micro-nano bubbles and sodium hypochlorite.","authors":"Tao Zhu, Guijuan Li, Yan Cheng, Hui Li, Min Zhou, Mengyao Jing","doi":"10.1007/s10653-025-02695-3","DOIUrl":"10.1007/s10653-025-02695-3","url":null,"abstract":"<p><p>In this paper, the potential and mechanistic behavior of micro-nano bubbles (MNBs) synergistic with sodium hypochlorite (NaClO) in the degradation of sulfamethoxazole (SMX) were thoroughly investigated. In the MNBs-NaClO system, the effects of varying environmental factors (NaClO concentration, pH, inorganic anions, surfactants) on the degradation efficiency of SMX were investigated. The degradation products and pathways of SMX were investigated to reveal the degradation mechanism of antibiotics within the MNBs-NaClO system by using density functional theory (DFT) and high-performance liquid chromatography-mass spectrometry (LC-MS). The degradation rate of SMX increased with the increase of NaClO concentration. SMX allowed efficient degradation in a wide pH range. The inorganic anion PO₄^3- showed a strong inhibitory effect on the degradation of SMX. Surfactants had a consistent inhibitory effect on the degradation progress of SMX. According to the degradation behavior of SMX in the MNBs-NaClO system, three degradation pathways were proposed: nitrosation, S-N bond breaking, chlorine substitution and chlorine oxidation. This study evaluated the removal efficiency of sulfonamide antibiotics by the synergistic MNBs-NaClO technology, revealing unique degradation mechanisms and fate pathways. It provides a critical theoretical basis for precisely predicting their environmental behavior and ecological risks in advanced oxidation systems/aquatic environments.</p>","PeriodicalId":11759,"journal":{"name":"Environmental Geochemistry and Health","volume":"47 9","pages":"393"},"PeriodicalIF":3.8,"publicationDate":"2025-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144872044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Targeted regulation of properties and microbial communities in tobacco continuous cropping obstacle soils using different types of biochar.","authors":"Xin Hu, Xianfeng Du, Peng Xiao, Wenjing Song, Haoming Chen","doi":"10.1007/s10653-025-02704-5","DOIUrl":"10.1007/s10653-025-02704-5","url":null,"abstract":"<p><p>Continuous cropping obstacle (CCO) is a widespread and intractable issue in crops cultivation. As a green, low-carbon and environmentally friendly material for improving soil quality, biochar has been applied in agricultural production. This study utilized agricultural solid waste to prepare three types of biochar materials (RB: rice straw biochar, PB: pig manure biochar, SB: sludge biochar) and applied them to the improvement of tobacco soil after 15 years of continuous cropping, aiming to investigate their ameliorative effects on soil physicochemical properties and microbial communities. Within a short term (10 days), all three types of biochar effectively increased the pH value of CCO soil, with the PB treatment showing the most significant (32.73%). Compared to CK, the addition of all three biochars increased the content of organic matter (24.37-32.75%), available potassium (25.37-242.58%), available sulfur (13.15-449.30%), and available phosphorus (0.26-4.57%) in CCO soil, and PB and SB treatments reduced the soil water loss by 31.09 and 20.81%. PB showed the most significant improvement in various soil elements, especially in available potassium and available sulfur, followed by RB. Furthermore, biochar exhibits notable improvement effects on beneficial bacterial taxa (Actinobacteriota, Proteobacteria), as well as on bacterial genera (Sphingomonas, Bacillus, Nocardioides). RB significantly increases the relative abundance of beneficial fungal genus Mortierella in CCO soil (31.07%). Therefore, considering the demand of tobacco for soil potassium content and beneficial root microbial community, the combined application of PB and RB in tobacco CCO soil constitutes a moderate, practical, and environmentally friendly strategy.</p>","PeriodicalId":11759,"journal":{"name":"Environmental Geochemistry and Health","volume":"47 9","pages":"392"},"PeriodicalIF":3.8,"publicationDate":"2025-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144862218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Effects of mine tailings on the structure and diversity of microbial communities in riparian soils.","authors":"Andressa Cristhy Buch, Krishna Kumar Yadav, Douglas B Sims, Maria Elizabeth Fernandes Correia, Eduardo Duarte Marques, Ahmad J Obaidullah, Emmanoel Vieira Silva-Filho","doi":"10.1007/s10653-025-02682-8","DOIUrl":"10.1007/s10653-025-02682-8","url":null,"abstract":"<p><p>Mine tailing contamination from dam failures severely impacts riparian ecosystems and their interlinkages. This study assessed the effects of the Córrego do Feijão Mine (CFM) dam rupture on microbial communities across a 200 km sampling area. Biochemical, pedological, and ecological parameters were measured, including bacterial phylogeny, abundance, and diversity. The collapsed dam and surrounding areas exhibited the lowest microbial diversity and cultured colony-forming units (CFU) compared to reference sites. Metal concentrations significantly influenced pedological and biological parameters, especially bacterial composition, metabolic quotient, respiration, enzymatic activities, and nitrogen cycling. Ecotoxicity tests revealed greater inhibition of dehydrogenase activity in heavily contaminated areas, indicating a higher sensitivity of Arthrobacter globiformis compared to Azospirillum brasilense. The Pseudomonadaceae and Acidobacteriaceae families, along with the Proteobacteria, Acidobacteriota, Actinobacteriota, and Firmicutes phyla, were the most abundant, demonstrating resilience to post-spill environmental conditions. Changes in microbial activities suggest a potential reduction or loss of ecosystem services, compromising soil functionality and quality. These findings aid in selecting the most suitable local soil microorganisms for biomonitoring and bioremediation in mining sludge-contaminated sites.</p>","PeriodicalId":11759,"journal":{"name":"Environmental Geochemistry and Health","volume":"47 9","pages":"394"},"PeriodicalIF":3.8,"publicationDate":"2025-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144872043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Urban soil microplastic characterization across diverse land use types along the Anyangcheon stream in Seoul, Korea.","authors":"Ntegang Venant Atem, Jin-Yong Lee, Rogers Wainkwa Chia, Eunju Jeong","doi":"10.1007/s10653-025-02710-7","DOIUrl":"10.1007/s10653-025-02710-7","url":null,"abstract":"<p><p>Microplastics (MPs) are becoming more prevalent in soils. MPs can alter soil pH and soil pore structure. A lot of studies lately have identified and quantified MP occurrence in areas of variable community settlement, such as rural areas with excessive farming and fewer human populations. However, there are limited studies on the spatial distribution of MPs in urban areas along a stream. So, this study aimed to investigate the occurrence, characteristics, and distribution of MPs in soils across 3 different land-use types (high schools, park playgrounds, and residential areas) along the Anyangcheon stream in Seoul, the biggest city in Korea. Overall, 12 samples (4 per land-use type) were collected, pretreated, and analysed using Fourier Transform Infrared (FTIR) spectroscopy. Results revealed that the average concentration of MPs in soil samples in high schools was 62-824 items/kg, 129-5083 items/kg in parks, and 179-2006 items/kg in residential areas. The predominant shape of MPs were fragments, and with variable colours such as: black, white, beige, and grey, and natural being the most prominent colour. The patterns of size distribution varied significantly across the land-use types, and different MP polymers showed varied occurrences, with polypropylene (PP) being the predominant polymer. From the result it was inferred that land-use type significantly affecting MP particle size distribution in soils (p = 0.009). Common sources of MP, such as synthetic textile, plastic waste, synthetic turfs and degradation from playground equipment's, contributes to their presence in these environments.</p>","PeriodicalId":11759,"journal":{"name":"Environmental Geochemistry and Health","volume":"47 9","pages":"391"},"PeriodicalIF":3.8,"publicationDate":"2025-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144858992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Dissolved oxygen-driven transformations of inorganic sulfur and heavy metals during mariculture sediment aging.","authors":"Zhaoran Li, Yanqing Sheng","doi":"10.1007/s10653-025-02713-4","DOIUrl":"10.1007/s10653-025-02713-4","url":null,"abstract":"<p><p>Dissolved oxygen (DO) critically regulates biogeochemical processes in mariculture sediments, yet its integrated effects on sulfur-metal interactions during sediment aging remain poorly understood. This study investigated the migration and transformation of reduced inorganic sulfur (RIS) and heavy metals in mariculture sediments under varying DO levels. Lower DO accelerated the dominance of acid-volatile sulfide (AVS) within the reduced inorganic sulfur pool (AVS/RIS = 56.11% under DO-1 vs. 41.18% under DO-3) and shortened the time required for AVS to become the dominant component by 16.67% (compared to DO-3). DO variations minimally affected overall metal mobility (coefficient of variation, CV < 12%), but Cu exhibited exceptional sensitivity. The influence of DO concentration was particularly significant on the oxidizable (F3) and residual (F4) fractions of Cu, and the F4 fraction of Pb. The F4 fraction of both Cu and Pb increased under low DO, likely due to reductive activation and lattice diffusion. The differing impacts of DO on RIS (significant) versus heavy metal speciation (relatively minor) resulted in significant variations in the correlations between sulfur species and heavy metal fractions across DO treatments. Sediment microbial richness and diversity declined with decreasing DO, significantly altering the relative abundance of bacterial phyla and the genus Desulfuromonas. DO primarily regulated sediment carbon, sulfur, and iron cycling, exerting its most pronounced impacts on sulfur transformations. Depleted DO intensifies the environmental hazards of inorganic sulfides through enhanced mobilization. Proactive control strategies are therefore imperative during hypoxic episodes to mitigate sulfide-driven ecological risks. This study provides new insights for managing sediment redox conditions in mariculture systems.</p>","PeriodicalId":11759,"journal":{"name":"Environmental Geochemistry and Health","volume":"47 9","pages":"390"},"PeriodicalIF":3.8,"publicationDate":"2025-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144858991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Mechanism of plant synergistic amendments remediation for electrolytic manganese residue contaminated with ammonia nitrogen and manganese.","authors":"Cixing Li, Xuegang Yu, Qing Li, Aijiang Yang, Shirui Liu, Shixue Mei","doi":"10.1007/s10653-025-02700-9","DOIUrl":"10.1007/s10653-025-02700-9","url":null,"abstract":"<p><p>Electrolytic manganese residue (EMR), due to its large-scale storage, contains high concentrations of manganese (Mn) and ammonium nitrogen ( <math><msubsup><mtext>NH</mtext> <mrow><mn>4</mn></mrow> <mo>+</mo></msubsup> </math> -N), posing a severe threat to the environment and human health with its poor physicochemical properties. The combination of amendments and phytoremediation represents an cost-effective approach for EMR management. This study investigates the effects of amendments on mitigating the harsh conditions of EMR and their influence on phytoremediation. Under non-closed greenhouse conditions, potting experiments lasting 60 days were conducted, incorporating different ratios of activated phosphorus tailings and mature sludge as amendments into EMR, alongside Lolium perenne L., Medicago sativa, and Cynodon dactylon. Results indicate that the application of amendments significantly improved the properties of EMR, optimizing plant growth conditions. Mn and <math><msubsup><mtext>NH</mtext> <mrow><mn>4</mn></mrow> <mo>+</mo></msubsup> </math> -N became more stable, reducing their concentrations and bioavailability in leachate. Moreover, Mn content in plant roots and shoot markedly decreased, while the activities of glutamate synthase (GOGAT), glutamine synthetase (GS), and glutamate dehydrogenase (GDH) were significantly enhanced. In summary, amendments not only effectively improved the habitat quality of EMR but also increased the tolerance of remediation plants to Mn and <math><msubsup><mtext>NH</mtext> <mrow><mn>4</mn></mrow> <mo>+</mo></msubsup> </math> -N, demonstrating potential in EMR remediation.</p>","PeriodicalId":11759,"journal":{"name":"Environmental Geochemistry and Health","volume":"47 9","pages":"388"},"PeriodicalIF":3.8,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144854933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}