Environmental Geochemistry and Health最新文献

{"title":"Multi-metal co-exposure and type 2 diabetes: integrating biomonitoring evidence, inflammatory mechanisms, and a framework for future risk stratification.","authors":"Rajat Kumar Mishra, Salona Roy, Anjali Mishra, Ved Prakash, Ravi Shekhar, Nitesh Kumar, Krishna Murti","doi":"10.1007/s10653-026-03518-9","DOIUrl":"10.1007/s10653-026-03518-9","url":null,"abstract":"<p><p>Diabetes Mellitus Type 2 prevalence is still increasing around the world, and there is growing evidence of the role of environmental co-exposures to heavy metals-cadmium, lead, arsenic, mercury, and chromium-in glycaemia impairment. Contrarily to studies on single metal toxicology, real-life situations consist in exposure to mixtures of heavy metals through environmental, occupational and dietary pathways, especially in places like the Indo-Gangetic plain of India, characterized by the presence of geological arsenic pollution in association with metals exposure. This paper provides a narrative review on the current state of art in the domain of three key issues connected to risk stratification in Type 2 Diabetes Mellitus: methods for biomonitoring metals, inflammatory and molecular pathways involved in diabetes onset and progression related to metal exposures and statistical approaches for modeling joint effects of mixtures. Firstly, discuss on the biomonitoring methods, with particular emphasis to blood, urine and hair and nail as classical matrices and new emerging matrices (saliva, buccal cells). The analytical technique (AAS vs ICP-MS) is considered as well. It will focus on the heterogeneity between different methodologies, including matrix-specific exposure window and inter-laboratory variability. Regarding mechanistic aspects, there is an agreement in scientific literature on several molecular pathways involved in glycaemia alterations, including oxidative stress, NF-κB inflammation pathway, mitochondria dysfunction, epigenetics alteration and insulin signaling impairment, with possible synergistic rather than additive action of heavy metals in the impairment of beta-cell function and insulin resistance. Finally, it discusses some recent advances in quantifying joint metal effects on diabetes through specific statistics as WQS regression and Bayesian Kernel Machine regression (BKMR) and quantile g-computation. Even though important methodological advances have been made, a translational gap remains: no validated procedure currently exists that integrates exposure metrics, inflammatory biomarkers and clinical variables for individual risk stratification. We therefore outline a research-stage framework that could guide future development of such tools.</p>","PeriodicalId":11759,"journal":{"name":"Environmental Geochemistry and Health","volume":"48 15","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149105920","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":"Distinct ecological patterns of abundant and rare prokaryotic taxa across sediment and water habitats in an acid mine drainage-impacted river system.","authors":"Yuguang Wang, Longqi Xu, Chenbing Ai, Zhu Chen, Hongbo Zhou, Haina Cheng","doi":"10.1007/s10653-026-03523-y","DOIUrl":"10.1007/s10653-026-03523-y","url":null,"abstract":"<p><p>Acid mine drainage (AMD) can lead to severe pollution of surrounding aquatic systems like rivers. Although microbial ecosystems have been documented in the AMD-impacted riverine systems, the ecological patterns and potential assembly mechanisms of abundant and rare taxa are still largely unexplored. Herein, we examined the diversity, composition, co-occurrence networks and assembly of the whole prokaryotic communities, abundant taxa, and rare taxa along an AMD-impacted river. The results revealed a strong correlation between prokaryotic communities and environmental variables in the AMD-impacted river. Significant spatial variations in diversity and composition were observed for the whole community and abundant taxa in sediment habitats, but not in water habitats. Specifically, in sediment habitats, the relative abundances of Gamma- and Beta-proteobacteria decreased along the river, while Alphaproteobacteria and Acidobacteriota increased. Conversely, water habitats were characterized by Acidovorax and Acidocella. Furthermore, the alpha diversity of rare taxa showed no significant correlation with spatial distance in either sediment or water habitats. However, rare taxa occupied important topological positions in the co-occurrence network. Stochastic processes (dispersal limitation and undominated processes) generally dominated community assembly especially for rare taxa, but the roles of deterministic processes (heterogeneous and homogeneous selection) in shaping whole communities and abundant taxa of sediment habitats should not be neglected. These findings offer novel insights into microbial patterns and assembly mechanisms in AMD-impacted riverine ecosystem.</p>","PeriodicalId":11759,"journal":{"name":"Environmental Geochemistry and Health","volume":"48 15","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149105914","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":"Environmental radiological baseline characterization of a proposed medical cyclotron facility in Indonesia using dual-detector measurements and geostatistical analysis.","authors":"Dikdik Sidik Purnama, Dani Muliawan, Muhayatun Santoso, Rian Fitriana, Eka Djatnika Nugraha, Adi Rahmansyah Amir Abdullah, Sidik Permana","doi":"10.1007/s10653-026-03505-0","DOIUrl":"10.1007/s10653-026-03505-0","url":null,"abstract":"<p><p>Establishing a robust pre-operational radiological baseline is essential for distinguishing pre-existing environmental variability from changes associated with future nuclear medicine operations. This study characterizes the ambient gamma-radiation field at a proposed medical cyclotron facility in South Cikarang, West Java, Indonesia. Nineteen monitoring locations were designated across heterogeneous terrain, with direct measurements obtained at 18 locations because Point B was unavailable. Ambient dose equivalent rates, H*(10), were measured at the ground surface and 1 m above ground level using complementary Geiger-Müller (GM) and NaI(Tl) detectors, with ten replicate measurements per configuration. Across all detector systems and measurement heights, H*(10) ranged from 0.030 to 0.120 µSv h^-1, and median surface-to-1 m reductions were 11.8% for GM and 14.2% for NaI(Tl). Inter-detector agreement was strong, with Pearson r = 0.958 at the surface and 0.919 at 1 m. Ordinary Kriging identified spatial dependence over approximately 100 m, with higher values associated with engineered sand and crushed-stone fill and lower values generally associated with natural clay-dominated and vegetated ground. Screening-level annual external dose estimates ranged from 0.052 to 0.172 mSv y^-1 and excess lifetime cancer risk from 1.76 × 10^-4 to 5.86 × 10^-4. The findings establish a site-specific pre-operational radiological baseline and demonstrate a transferable framework integrating measurement validation, uncertainty analysis, and spatial modelling for environmental surveillance around planned radiological facilities.</p>","PeriodicalId":11759,"journal":{"name":"Environmental Geochemistry and Health","volume":"48 15","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149105932","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":"Land-use and depth-dependent distribution of potentially toxic elements and ecological risk in soils of a phosphate-mining watershed upstream of Dianchi Lake, China.","authors":"Yanan Chen, Rui Liu, Kaiming Shih, Hua Zhang, Han Ma, Yu Gao","doi":"10.1007/s10653-026-03514-z","DOIUrl":"10.1007/s10653-026-03514-z","url":null,"abstract":"<p><p>Phosphate mining can alter soil geochemistry and increase potentially toxic element (PTE) concentrations, but the combined effects of land use and soil depth on PTE distributions in mining areas remain insufficiently understood. This study investigated soil physicochemical properties, nutrient status, PTE concentrations, and ecological risk across tailings land, farmland, bare land, grassland, and natural forest land in the Jinning phosphate-mining area upstream of Dianchi Lake, southwestern China. Sixty composite soil samples were collected from four depth intervals (0-10, 10-30, 30-60, and 60-90 cm). Concentrations of Cd, Cr, Cu, Ni, Pb, Zn, and Hg were determined, and contamination was assessed using the single-factor pollution index, Nemerow comprehensive pollution index, geo-accumulation index, enrichment ratio, and potential ecological risk index (RI). Soil properties and PTE concentrations varied among land-use types and soil depths. Soil organic matter, total nitrogen, available phosphorus, and available potassium generally declined with depth, whereas pH increased. Tailings land was the principal contamination hotspot, with surface Cd and Pb concentrations of 0.70 ± 0.35 and 176.8 ± 130.0 mg kg^-1, respectively, and a Nemerow index of 2.085. The RI of tailings land decreased from 184.52 ± 57.18 in the 0-10 cm layer to 110.34 ± 20.36 in the 60-90 cm layer. Mean RI values exceeded 150 only in the upper 30 cm, indicating moderate ecological risk. Cd and Hg made the largest contributions to RI. These findings identify tailings-affected soils as the priority management unit and show that depth-resolved assessment is necessary for characterizing PTE risks in the Jinning phosphate-mining area.</p>","PeriodicalId":11759,"journal":{"name":"Environmental Geochemistry and Health","volume":"48 15","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149079771","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":"Hydrogeochemical evaluation and entropy-driven water quality assessment of Lakshmipur District's groundwater, Southeastern Bangladesh.","authors":"Md Mahedi Hasan, Khondaker Emamul Haque, Shamim Ahmed, Md Nazmul Islam Hasan, Md Mahabubul Hasan","doi":"10.1007/s10653-026-03501-4","DOIUrl":"10.1007/s10653-026-03501-4","url":null,"abstract":"&lt;p&gt;&lt;p&gt;Coastal communities in Bangladesh heavily depend on groundwater as a primary source of drinking water. However, these sources are under increasing threat due to natural and human-induced factors (geogenic and anthropogenic effects), including excessive salinity, contamination through heavy metals, runoff from agricultural fields, and municipal sewage. To assess seasonal variations in hydrogeochemistry, water quality, pollution status, and potential health threats, we collected 46 groundwater samples from Lakshmipur District. Of these, 23 samples were collected during the pre-monsoon (March-April 2024) season and 23 samples were collected during the post-monsoon (October-November 2024) season. The evaluation was conducted by assessing the major physicochemical characteristics of the groundwater samples, as well as the major ionic species and selected trace metals, using standard field/laboratory methodology. Pre-monsoon groundwater showed salinity exceedance in 54.16% of samples, while 58.33% of samples had Na&lt;sup&gt;+&lt;/sup&gt; and Cl&lt;sup&gt;-&lt;/sup&gt; exceeding the limits. In 75% and 91.67% of the samples, Fe and Mn surpassed the DoE criteria, respectively, whereas K&lt;sup&gt;+&lt;/sup&gt; did so in 71.17% and As in 66.67%. Following the post-monsoon season, 43.48% of samples had salinity exceedance, followed by Na&lt;sup&gt;+&lt;/sup&gt; and Cl&lt;sup&gt;-&lt;/sup&gt; in 65.22% and 47.83%, Fe&lt;sup&gt;2+&lt;/sup&gt; and Mn&lt;sup&gt;+&lt;/sup&gt; in 86.96% and 73.91%, K&lt;sup&gt;+&lt;/sup&gt; in 60.87%, and As in 95.65%. Groundwater evolution was strongly associated with mineral dissolution and water-rock interaction, according to integrated hydrogeochemical investigations. Positive CAI readings suggest the occurrence of reverse ion exchange, whereas Na/Cl ratios (&lt; 1) showed chloride enrichment from evaporation and localized saline-water influence. In the pre-monsoon season, EWQI (Entropy Water Quality Index) values showed that 20% of the samples were rated as excellent, 35% as good, and 30% as Extremely Poor. In the post-monsoon, the number of excellent samples increased to 30%, but the number of Extremely Poor samples also rose to 43%, showing that the overall water quality worsened in some areas. Fuzzy inference and three-dimensional response surface analyses indicated that Fe-K and Mn-As interactions were strongly associated with variations in EWQI. Pollution indices (HPI, HEI, C&lt;sub&gt;d&lt;/sub&gt;, and NPI) confirmed widespread heavy metal contamination. Health risk assessment revealed that children face greater non-carcinogenic risks than adults, with Hazard Index (HI) values exceeding the safe threshold (HI &gt; 1). The novelty of this study is to integrate an entropy-based water quality assessment with fuzzy logic modeling, pollution indices, hydrogeochemical interpretation, and health risk assessment to determine the major factors controlling the seasonal degradation of groundwater quality in a coastal aquifer. These findings highlight the need for seasonal groundwater monitoring, safe-well mapping, treatment of metal-","PeriodicalId":11759,"journal":{"name":"Environmental Geochemistry and Health","volume":"48 15","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149079664","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":"Radiological characteristics of coal-to-ash transformation: a paired coal-ash assessment of natural radionuclides.","authors":"Aneta Łukaszek-Chmielewska, Marzena Rachwał, Joanna Rakowska, Barbara Piotrowska, Krzysztof Isajenko, Mirosław Szyłak-Szydłowski","doi":"10.1007/s10653-026-03509-w","DOIUrl":"10.1007/s10653-026-03509-w","url":null,"abstract":"<p><p>Naturally occurring radioactive materials (NORM) in coal and its combustion residues represent a potential source of environmental contamination, particularly under large-scale energy production and waste reuse scenarios. However, the radiological transformation of radionuclides during coal combustion remains insufficiently quantified. This study applies a paired coal-ash approach to assess systematic changes in the activity concentrations of ⁴⁰K, ²²⁶Ra, and ²³²Th and associated radiological hazard indices. Nine hard coal samples from Poland and international sources, together with their corresponding bottom ashes produced under controlled combustion conditions, were analysed using gamma-ray spectrometry. All coal samples exhibited low radionuclide activities, with concentrations below global average values. In contrast, combustion resulted in a highly consistent and approximately six-fold increase in radionuclide activity and all radiological indices, accompanied by complete directional consistency and very large effect sizes (r = 0.889). This increase reflects the concentration of naturally occurring radionuclides within the mineral residue, as the organic fraction of coal is removed during combustion. These findings demonstrate that combustion acts as a predictable process of radionuclide enrichment and radiological amplification. Enrichment factors ranged from approximately 3.8 to 9.9 across the analysed coal-ash pairs, and the external gamma radiation dose rate exceeded the recommended reference level of 54 nGy h⁻¹ in all nine ash samples. Although most ash samples remained within recommended radiological limits, the magnitude and uniformity of enrichment indicate a potential risk of secondary environmental contamination and increased environmental exposure-particularly where combustion residues are reused in construction materials or land applications. It should be noted, however, that this study assessed the potential for such impact based on elevated radioactive activity of the ash, rather than on direct observation of radionuclide migration into the environment. The results highlight the need to treat coal combustion residues as radiologically distinct materials-at least under the combustion conditions investigated in the present study-and to incorporate transformation processes into environmental risk assessment and management frameworks.</p>","PeriodicalId":11759,"journal":{"name":"Environmental Geochemistry and Health","volume":"48 15","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13623988/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149079792","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":"Correction: Nature-based solutions for nutrient and emerging contaminant reduction in a Mediterranean Ramsar wetland.","authors":"Emilio Moreno, María Gómez-Pozuelos, Francisco Guerrero, Cristina Postigo, África Lupión, José María Conde-Porcuna, Inmaculada de Vicente","doi":"10.1007/s10653-026-03493-1","DOIUrl":"10.1007/s10653-026-03493-1","url":null,"abstract":"","PeriodicalId":11759,"journal":{"name":"Environmental Geochemistry and Health","volume":"48 15","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13624014/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149079668","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":"Influence of hydrodynamic conditions on heavy metal distribution and ecological risk in freshwater sediments: a comparative study of reservoir and stream ecosystems.","authors":"Koray Özşeker, Yahya Terzi, Nigar Alkan, Kadir Seyhan","doi":"10.1007/s10653-026-03481-5","DOIUrl":"10.1007/s10653-026-03481-5","url":null,"abstract":"<p><p>This study provides a comparative and process-oriented assessment of heavy metal contamination in surface sediments across freshwater ecosystems in the Eastern Black Sea region (Türkiye), aiming to elucidate the role of hydrodynamic conditions and anthropogenic inputs in shaping metal distribution and ecological risk. Sediment samples were collected seasonally between December 2024-2025 from Muratlı Reservoir (lentic system) and two lotic systems, Arılı and Çağlayan streams, with four sampling stations in each ecosystem. Concentrations of Cu, Pb, Zn, Ni, As, Co, and Cr were determined using ICP-MS, and contamination was evaluated using geochemical indices and sediment quality guidelines. Metal concentrations exhibited pronounced spatial variability among the systems. Arılı Stream showed the highest accumulation levels, with concentration ranges of Cu (53.5-120.5 μg/g), Pb (27.5-55.5 μg/g), Zn (142.8-215 μg/g), Ni (27.2-46.5 μg/g), As (19.3-66 μg/g), Co (20.4-55.6 μg/g), and Cr (55.0-164 μg/g). In contrast, Çağlayan Stream exhibited elevated concentrations for Cu (55.3-117.4 μg/g), Pb (37.1-92.6 μg/g), and Zn (120.3-166 μg/g), while other elements remained within moderate ranges. Muratlı Reservoir showed lower but variable concentrations, with Cu ranging between 43.6 and 72.3 μg/g and Zn between 83 and 138 μg/g. Seasonal patterns indicated increased metal concentrations during summer and autumn.The integrated assessment identified As and Pb as the primary elements of concern, while Zn and Ni were secondary contributors with potential ecological implications. Overall, the findings demonstrate that contamination and ecological risks are system dependent. Comparison with sediment quality guidelines identified As and Pb as the primary ecological concerns, emphasizing the need for continuous monitoring, effective pollution control, and sustainable sediment management.</p>","PeriodicalId":11759,"journal":{"name":"Environmental Geochemistry and Health","volume":"48 15","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149079698","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":"Data driven prediction of uranium in groundwater for environmental radioactivity surveillance.","authors":"P Padma Savitri, Utkarsh Bharadwaj, B Ramesh, J Sudhakar, R Balaram Kumar, Manoj Warrier, A D P Rao","doi":"10.1007/s10653-026-03510-3","DOIUrl":"10.1007/s10653-026-03510-3","url":null,"abstract":"<p><p>Uranium occurrence in groundwater is governed by complex hydrogeochemical processes, yet routine monitoring remains analytically demanding. A dataset of 1295 groundwater samples collected from a coastal region of southeastern India during 2016-2025 was used to develop a machine learning framework for predicting uranium concentrations from routinely measured physicochemical parameters. Multi-threshold binary classification was implemented at 2, 15, and 30 µg L⁻¹, representing precautionary, guideline, and regulatory levels, respectively. Advanced ensemble learning algorithms were evaluated under pronounced class imbalance conditions. Under pronounced class imbalance, CatBoost achieved the highest performance at 2 µg L⁻¹ (F1-score = 80.8%), while LightGBM performed best at 15 µg L⁻¹ (F1-score = 66.6%). At 30 µg L⁻¹, Isolation Forest achieved 100% recall with a 1.12% false-positive rate, reducing laboratory screening workload by 98.7%. TDS, hardness, chloride, and sulphate were the dominant predictors, with SHAP analysis linking their contributions to mineral dissolution, salinity evolution, and carbonate complexation influencing uranium mobility. Climate change may further modify these processes through altered recharge, water-rock interactions, and groundwater salinity (Barbieri, Marino Domenico et al.,2021). The study uniquely integrates routine physicochemical predictors, multi-threshold classification aligned with evolving WHO guidelines, and one-class anomaly detection for rare-event uranium screening. The framework offers a cost-effective approach for environmental monitoring and early warning, supporting public health protection, regulatory decision-making, and sustainable groundwater.</p>","PeriodicalId":11759,"journal":{"name":"Environmental Geochemistry and Health","volume":"48 15","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149073832","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":"Efficient removal of composite organic micro-pollutants by amphiphilic modified magnetic biochar.","authors":"Shengyang Zou, Zhenhong Wu, Qianhong Yang, Yuping Zhang, Mei Zhang, Shilin Zhao, Jun Ma, Xiaoting Li, Yang Liao","doi":"10.1007/s10653-026-03487-z","DOIUrl":"10.1007/s10653-026-03487-z","url":null,"abstract":"<p><p>Waterborne organic micro-pollutants threaten both ecological integrity and human health. However, the simultaneous elimination of these contaminants remains challenging. We synthesized a magnetic biochar (CD/Fe₃O₄-BC) with amphiphilic and magnetic properties via a coprecipitation method using humic acid, iron compounds, and β-cyclodextrin as raw materials, followed by optimization of the preparation conditions. Surface and bulk properties of the modified biochar were probed by multiple analytical techniques, including SEM, BET, FT-IR, XRD, and XPS. The results showed that decorating the biochar surface with Fe₃O₄ nanoparticles and β-cyclodextrin substantially expanded its specific surface area and generated new active sites for pollutant adsorption. Adsorption experiments demonstrated that CD/ Fe₃O₄-BC efficiently removed both hydrophobic 2,4-dichlorophenol (2,4-DCP) and hydrophilic tetracycline hydrochloride (TCH), achieving removal rates of 86.38% and 85.45%, respectively. Under the optimal adsorption conditions, CD/ Fe₃O₄-BC achieved equilibrium adsorption capacities reaching approximately 105.71 mg g^-1 toward 2,4-DCP and 35.44 mg g^-1 toward TCH in the binary mixed system. The adsorption process involved multiple mechanisms, including pore filling, hydrogen bonding, π-π stacking, and electrostatic attraction. Furthermore, surface complexation contributed specifically to TCH adsorption. The Fe₃O₄ loading enables rapid magnetic separation of the spent adsorbent, and reusability tests showed that the material maintained elevated removal efficiency over five successive reuse cycles. This work provides a promising strategy for treating composite organic micropollutants in water.</p>","PeriodicalId":11759,"journal":{"name":"Environmental Geochemistry and Health","volume":"48 15","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149073761","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}