Environmental Research最新文献

{"title":"Removal of emerging pollutants by an adsorbent developed from a waste produced in a thermoelectric power plant: adsorption and ecotoxicological studies","authors":"Erica Porto Fernandes ,&nbsp;Lucas dos Santos Lima ,&nbsp;José Fernando de Macedo ,&nbsp;Ana Paula Alves dos Santos ,&nbsp;Andrea Novelli ,&nbsp;Eliana Midori Sussuchi","doi":"10.1016/j.envres.2025.122259","DOIUrl":"10.1016/j.envres.2025.122259","url":null,"abstract":"<div><div>The increasing use and improper disposal of pharmaceuticals have caused significant environmental impacts. Conventional treatment methods face challenges at the industrial scale, whereas abundant, low-cost adsorbents such as residues offer a sustainable alternative for pharmaceutical removal. In this study, an adsorbent was developed from sludge generated by the water treatment system of a thermoelectric power plant. The precursor was chemically modified with dodecyltrimethylammonium chloride (DTAC) and designated as chemically modified residue (CMR). The CMR was applied for the removal of ibuprofen, sodium diclofenac, and potassium losartan from aqueous solutions. Characterization was performed using SEM, FTIR, XRD, TG, nitrogen adsorption–desorption, PZC, XRF, CHN, and XPS. XRF revealed Si, Al, and Fe as the predominant elements. XPS analysis identified surface chemical bonds including C–C, C–OH, C–O–C, Si–C, and nitrogen species. FTIR analysis revealed vibrational bands associated with Si–O–Si, Si–O–Al, Si–O, Si–OH, and CH₂. XRD identified crystalline phases such as SiO₂ and NaAlSi₃O₈. Modification with DTAC led to an improvement in removal efficiency, with values exceeding 70.00 %. The maximum experimental adsorption capacities were 101.43 mg g⁻¹ for losartan, 73.77 mg g⁻¹ for diclofenac, and 24.81 mg g⁻¹ for ibuprofen, demonstrating the system's potential to remove these compounds. Ecotoxicity tests using pharmaceutical solutions resulted in EC₅₀,_48h values of 24.11, 175.50, and 53.92 mg L⁻¹ for diclofenac, losartan and ibuprofen, respectively. These results demonstrate that CMR is an effective and low-cost adsorbent for pharmaceutical removal, promoting waste reuse and reducing environmental impact.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"285 ","pages":"Article 122259"},"PeriodicalIF":7.7,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144549011","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":"Synergistic plant-fungal interactions under Phragmites australis - mangrove mixed growth regimes boost particulate organic carbon sequestration in estuarine wetlands","authors":"Junma Chen ,&nbsp;Jiayi Xu ,&nbsp;Weiqi Wang ,&nbsp;Ronbin Yin ,&nbsp;Jordi Sardans ,&nbsp;Zhihao Zhang ,&nbsp;Fanjiang Zeng ,&nbsp;Shiyu Chen ,&nbsp;Xiaoying Ren ,&nbsp;Siqi Yu ,&nbsp;Ning Hou ,&nbsp;Josep Peñuelas","doi":"10.1016/j.envres.2025.122271","DOIUrl":"10.1016/j.envres.2025.122271","url":null,"abstract":"<div><div>Estuarine wetlands, as globally critical carbon sink systems, rely heavily on the dynamics of soil particulate organic carbon (POC) to regulate carbon cycling. However, the mechanisms underlying how plant-fungal synergies under mixed plant communities drive POC accumulation remain unclear. This study focuses on the Min River Estuary wetlands, comparing the effects of mangrove wetland, <em>Phragmites australis</em> wetland, and mixed <em>P. australis</em>-mangrove wetland on soil POC and carbon components in particulate organic matter (POM). Mixed communities exhibit higher total biomass than monocultures. Fungal community analysis demonstrated that the relative abundances of <em>Roussoella</em>, <em>Geosmithia</em>, and <em>Entorrhiza</em> in mixed wetlands were significantly higher than in monoculture habitats (<em>p</em> &lt; 0.05), with <em>Geosmithia</em> showing a significant positive correlation with POC (<em>p</em> &lt; 0.05). Annual mean POC content in mixed wetlands surpassed mangrove and <em>P. australis</em> monocultures by 29.31 % and 28.69 %, respectively. RDA analysis revealed that aboveground biomass (AGB), belowground biomass (BGB), <em>Papiliotrema</em>, and <em>Phaeomyces</em> were the primary factors driving variations in POC. Collectively, mixed plant communities enhance POC accumulation by promoting diverse litter inputs and fungal-driven lignin decomposition-stabilization pathways. These findings elucidates the synergistic plant-fungal interactions driving POC accumulation in estuarine wetlands under mixed plant communities, providing a theoretical foundation for enhancing coastal wetland carbon sequestration and refining predictions of carbon cycling under global change.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"284 ","pages":"Article 122271"},"PeriodicalIF":7.7,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144535799","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":"Removal of 1,2-dichloroethane from groundwater using modified biochar-zerovalent copper nanocomposites in combination with potassium borohydride","authors":"Zongzheng Yang ,&nbsp;Lina Tang ,&nbsp;Yanhui Dou ,&nbsp;Jingce Zhou ,&nbsp;Fan Yan ,&nbsp;Tian Qin ,&nbsp;Lang Wang ,&nbsp;Zhiguo Wu ,&nbsp;Tingting Yang","doi":"10.1016/j.envres.2025.122243","DOIUrl":"10.1016/j.envres.2025.122243","url":null,"abstract":"<div><div>This study investigated the removal of persistent 1,2-dichloroethane (1,2-DCA) from water using modified biochar-loaded zerovalent copper nanocomposites (nZVC/BBC) combined with potassium borohydride (KBH₄) (nZVC/BBC/KBH₄). Batch experiments demonstrated that 1.5 g/L nZVC/BBC with 25 mmol/L KBH₄ removed 86.94 % of 100 mg/L DCA from 100 mL aqueous solution within 12 h. The removal process followed Pseudo-second-order (PSO) kinetics model, suggesting chemisorption as the dominant mechanism. The pH of the solution of 5–13 resulted in improved removal efficiency; therefore, the composite material was adaptable to a wide pH range. The co-existing ion SO₄²⁻ had inhibitory effects on the removal of 1,2-DCA, whereas the effects of other co-existing ions (K⁺, Ca²⁺, and HCO₃⁻) were minimal. The nZVC/BBC could be regenerated using NaOH, achieving over 70 % efficiency after five cycles when combined with KBH₄ for 1,2-DCA removal. Characterization of the nZVC/BBC composite after the reaction was performed using XRD and XPS analyses. Adsorption kinetic models and gas chromatography-mass spectrometry (GC-MS) analysis indicated that the removal mechanism for 1,2-DCA involved both surface adsorption, pore filling and reduction reactions. In experiments using actual groundwater, the removal rate of 1,2-DCA reached 95 % when nZVC/BBC/KBH₄ were 3.5 g/L and 35 mmol/L. This work has implications for the construction of materials for collaborative removal of 1,2-DCA from water by adsorption-reduction, and provides a new idea for water pollution control.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"284 ","pages":"Article 122243"},"PeriodicalIF":7.7,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144535826","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":"Beyond the flow: ecological insights from diatom communities of a Mediterranean intermittent river","authors":"Davide Taurozzi ,&nbsp;Giulia Cesarini ,&nbsp;Carmela Di Santo ,&nbsp;Massimiliano Scalici","doi":"10.1016/j.envres.2025.122284","DOIUrl":"10.1016/j.envres.2025.122284","url":null,"abstract":"<div><div>Intermittent rivers (IR) are among the most widespread watercourses globally, characterized by alternating dry and wet phases. Despite these fluctuations, IRs support diverse ecosystems and considerable biodiversity. Among their biotic communities found in these rivers, diatoms serve as key primary producers and bioindicators. Due to the limited knowledge of how droughts affect IR biodiversity, this study investigates diatom responses to seasonal hydrological changes and water flow. Specifically, it focuses on taxonomic and functional composition and community structure of diatoms in a naturally occurring Mediterranean IR. Overall, species richness appeared to be unaffected by droughts and water flow, with similar values observed at both lentic and lotic sites. Taxonomic and functional α-diversity were generally higher in lotic waters (TRic = 12.9; Fric = 9.79) compared to lentic (TRic = 8.7; Fric = 3.23) sites across all diversity indices, though no significant differences were found in α-diversity between sites. While the environmental variables considered did not significantly affect variability between sampling sites, permutational analysis identified temperature (F = 1.49, p = 0.09) and dissolved oxygen (F = 2.11, p = 0.01) as important predictors for taxonomic and functional α-diversity. However, seasonality significantly influenced taxonomic (F = 2.28, p = 0.009) and functional (F = 8.86, p &lt; 0.01) β-diversity, with greater variability (1.33 times) observed in August. Findings also indicate significant differences in taxonomic dispersion between site types (F = 2.21, p = 0.04) but no significant differences in functional dispersion. These results suggest that whereas IR conditions may not definitely influence diatom α-diversity, seasonal changes play a key role for community turnover, highlighting the importance of the hydroperiod for shaping IR biodiversity. In the context of ongoing climate change, these findings are particularly relevant, as shifts in hydrological regimes may increasingly affect ecological dynamics and community structure in IR systems.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"285 ","pages":"Article 122284"},"PeriodicalIF":7.7,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144549009","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":"Soil antimony–microbe interactions in an abandoned antimony mine in southern China","authors":"Libo Pan ,&nbsp;Feng Chen ,&nbsp;Qingying Zhao ,&nbsp;Junyi Yang ,&nbsp;Yanling Qiu ,&nbsp;Xuefang Wu ,&nbsp;Xiao Guan","doi":"10.1016/j.envres.2025.122268","DOIUrl":"10.1016/j.envres.2025.122268","url":null,"abstract":"<div><div>Soil contamination resulting from antimony (Sb) mining activities poses a substantial environmental risk in karst ecosystems. Understanding microbially mediated Sb transformation mechanisms is critical for advancing eco-friendly remediation technologies. The structural and functional responses of soil microbial communities were systematically investigated across three distinct areas (mining, smelting, and control) in typical Sb mining regions of Southwest China. Integrated geochemical and multi-omics analyses revealed pronounced Sb contamination gradients. Total Sb (Sb_tot) concentrations followed the order: smelting area (8231.97 ± 6875.22) &gt; mining area (735.03 ± 367.21 mg/kg) &gt; control area (69.11 ± 0.47 mg/kg). Microbial community profiling indicated bacterial dominance (97.6 % relative abundance), followed by archaea (2.0 %) and fungi (0.4 %). Notably, eight bacterial genera (<em>Achromobacter</em>, <em>Sphingomonas</em>, <em>Thermomonas</em>, <em>Janibacter</em>, <em>Stenotrophomonas</em>, <em>Arenimonas</em>, <em>Bifidobacterium</em>, <em>and Halothiobacillus</em>) exhibited significant positive correlations (<em>p &lt;</em> 0.01) with Sb_tot concentrations, suggesting their resistance to Sb. Functional annotation revealed critical associations between Sb biotransformation and microbial metabolic pathways, particularly sulfur redox cycling (sulfur oxidation: <em>soxABXYZ</em>; sulfate reduction: <em>dsrAB</em>) and nitrogen metabolism (nitrate reduction: <em>narGHI</em>). Co-occurrence network analysis indicated synergistic relationships between Sb-resistant microbes and elemental-cycling functional genes. Collectively, the results suggest that microbial Sb transformation in karst soils involves sulfur-assisted electron transfer and nitrate-dependent Sb oxidation. This study provides insight into the biogeochemical drivers of Sb fate in contaminated environments and establishes a conceptual framework for the development of microbiome-based remediation strategies suitable for Sb-polluted karst regions.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"284 ","pages":"Article 122268"},"PeriodicalIF":7.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144549652","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":"Maternal exposure to pesticides and gestational diabetes mellitus in the Elfe cohort","authors":"Léa Guesdon ,&nbsp;Charline Warembourg ,&nbsp;Cécile Chevrier ,&nbsp;Blandine de Lauzon-Guillain ,&nbsp;Julien Caudeville ,&nbsp;Marie-Aline Charles ,&nbsp;Maela Le Lous ,&nbsp;Pauline Blanc-Petitjean ,&nbsp;Rémi Béranger","doi":"10.1016/j.envres.2025.122275","DOIUrl":"10.1016/j.envres.2025.122275","url":null,"abstract":"<div><h3>Background</h3><div>Gestational diabetes mellitus (GDM) increases risks of adverse perinatal outcomes and metabolic disorders in offspring. Some endocrine-disrupting chemicals are presumed to interfere with glucose metabolism. We aimed to assess the association between non-occupational exposures to pesticides and the risk of GDM.</div></div><div><h3>Methods</h3><div>The study was conducted on 11 512 women (791 with GDM) from the French nationwide Elfe cohort. Among 114 suspected pesticides identified using a toxicogenomic approach, 62 with detection frequency ≥10 % were analyzed across three sources of exposure: residential use (self-reported, n = 18), agricultural (geographic information system, n = 14) and dietary (estimated by a food-frequency questionnaire and monitoring data of pesticide residues in foods, n = 30). The association between exposure to pesticides (no or low vs. high) and the occurrence of GDM was tested with single and multi-source adjusted logistic regression models.</div></div><div><h3>Results</h3><div>In the multi-source model, dietary exposure to glyphosate (aOR = 0.6, 95 %CI: 0.5,0.9) or agricultural exposure (aOR = 0.8, 95 %CI:0.6,1.0) were associated with lower odds of GDM. The same effect was identified for two dietary pesticides: epoxiconazole (aOR = 0.6, 95 %CI: 0.5,0.8) and penconazole (aOR = 0.8, 95 %CI: 0.6,1.0). Dietary exposure to cypermethrin (aOR = 1.2, 95 %CI:1.0,1.5) and agricultural exposure to myclobutanil (aOR = 1.4, 95 %CI:1.1,1.9) were associated with higher odds of GDM. No significant association was identified for the residential use of pesticides.</div></div><div><h3>Conclusion</h3><div>This toxico-genomic-based study identifies five pesticides associated with GDM through agricultural or dietary exposure. These findings provide new insights into environmental contributors to GDM. Further research is needed to elucidate the underlying toxicological mechanisms and confirm these associations.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"284 ","pages":"Article 122275"},"PeriodicalIF":7.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144535827","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":"Dynamic relationships of antibiotic resistomes and greenhouse gas-functioning microbes across diverse habitats","authors":"Meiping Chen ,&nbsp;Lu Song ,&nbsp;Chen Ye ,&nbsp;Hans-Peter Grossart ,&nbsp;Yuyi Yang ,&nbsp;Siyue Li ,&nbsp;Hao Liao ,&nbsp;Yu Gong ,&nbsp;Rongxiao Che ,&nbsp;Quanfa Zhang","doi":"10.1016/j.envres.2025.122272","DOIUrl":"10.1016/j.envres.2025.122272","url":null,"abstract":"<div><div>Reservoir ecosystems with diverse habitats form critical interfaces where antibiotic resistance genes (ARGs) and greenhouse gas (GHG) emissions converge. Despite their distribution and ecological implications of ARGs across diverse habitats remain greatly unknown. There is a critical gap in dissecting the interlinkages between antibiotic resistomes and GHG-functioning microbes. Thus, we aimed to investigate the relationship between antibiotic resistomes and GHG-functioning microbes in various habitats of the Three Gorges reservoir, encompassing water, sediment, and riparian top- and sub-soil. We provide a comprehensive assessment of ARG abundance and diversity across four habitats. Significant differences in ARG, with riparian zones exhibiting more than twice the ARG abundance of water. Horizontal gene transfer of ARGs was more frequent in water, suggesting a pivotal role in aquatic ARG dissemination. The GHG-functioning microbes displayed habitat-specific composition and diversity, with key genera like <em>Neisseria</em> and <em>Azoarcus</em> in riparian subsoil, contrasting with <em>Streptomyces</em> in other habitats. The dynamic relationship of antibiotic resistomes and GHG-functioning microbes ranges from synergistic to competitive in varied habitats, reflecting antibiotic resistomes can influence ecological function stability. This study emphasizes the importance of considering resistomes in the context of global change, advancing our understanding of environmental management and conservation strategies in these critical ecosystems.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"284 ","pages":"Article 122272"},"PeriodicalIF":7.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144535088","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":"Cross-altitude distribution patterns of bacterial communities in Chinese rivers: evidence from meta-analysis","authors":"Ru Liu ,&nbsp;Peng Wang ,&nbsp;Qinwei Chen ,&nbsp;Wang Shu ,&nbsp;Mingjun Ding ,&nbsp;Minghua Nie ,&nbsp;Gaoxiang Huang ,&nbsp;Hua Zhang","doi":"10.1016/j.envres.2025.122269","DOIUrl":"10.1016/j.envres.2025.122269","url":null,"abstract":"<div><div>Altitudinal gradients shape river ecosystems through topographical and climatic heterogeneity, yet our understanding of bacterial community responses across altitude remains limited. We analyzed bacterial community structure in Chinese river systems using 2657 high-throughput sequencing samples from 175 publications (2008–2024) to reveal altitudinal distribution patterns and driving mechanisms of in water and sediments. Analysis revealed distinct bacterial compositions: river water was dominated by Proteobacteria (46.3 %), Actinobacteriota (17.0 %), and Bacteroidota (14.0 %); while sediments were characterized by Proteobacteria (43.6 %), Bacteroidota (9.9 %), and Chloroflexi (8.4 %). Both habitats showed significant altitudinal diversity patterns, with water communities exhibiting a hump-shaped diversity pattern and sediments showing a more complex double-humped pattern. Altitude shaped bacterial communities directly via climate variables in water, predominantly indirectly through human activities (indicated by Nighttime Lights, NTL) and physicochemical factors in sediments. Along altitudinal gradients, bacterial communities transition from anthropogenic and nutrient-driven controls at low-altitude gradient terrain to climate and phosphorus-limited regimes at high-altitude gradient terrain. These results demonstrate microbial vulnerability to environmental change and highlight the importance of integrated river management strategies that consider both climate change and human impacts.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"284 ","pages":"Article 122269"},"PeriodicalIF":7.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144535084","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":"Nanoengineering construction of Fe2O3/g-C3N4 heterojunctions for cooperative enhanced photocatalytic CO2 reduction and pollutant degradation","authors":"Yonggong Tang ,&nbsp;Ziran Zhang ,&nbsp;Fan Wu ,&nbsp;Tao Xu ,&nbsp;Yelei Li ,&nbsp;Xin Zhou ,&nbsp;Yuwei Pan ,&nbsp;Guangyu Wu","doi":"10.1016/j.envres.2025.122279","DOIUrl":"10.1016/j.envres.2025.122279","url":null,"abstract":"<div><div>Developing heterojunction photocatalysts represents a promising strategy to improve photocatalytic efficiency in wastewater treatment and address the greenhouse effect. This investigation involved the creation of a new Fe₂O₃/g-C₃N₄ heterojunction photocatalyst (FC-X) through a simple hydrothermal process to overcome these obstacles. The optimized FC-8 composite exhibited a high photocatalytic activity, achieving a 95.5 % degradation of RhB within 180 min and a CH₄ production rate of 19.72 μmol g⁻¹·h⁻¹ when exposed to visible light, demonstrating a reaction rate constant of 7.02∗10⁻³ min⁻¹, which is 1.63 and 1.75 times greater than pure Fe₂O₃ and g-C₃N₄, respectively. Additionally, FC-8 exhibited an enhanced CO₂ reduction rate, producing CH₄ at 19.72 μmol g⁻¹·h⁻¹, surpassing Fe₂O₃ and g-C₃N₄ by 1.91 and 8.12 times, respectively. Structural, optical, and electrochemical characterizations confirmed that the enhanced performance originates from efficient charge separation and a lower carrier recombination rate at the heterojunction interface. Active species trapping experiments showed singlet oxygen (¹O₂), superoxide radicals (O₂^•-) and hydroxyl radicals (^•OH) drive RhB degradation, with ¹O₂ being the dominant contributor. The FC-8 photocatalyst also exhibited excellent stability, retaining over 90 % efficiency after four cycles. This study introduces an encouraging approach to developing heterojunction photocatalysts aimed at sustainable wastewater treatment and CO₂ transformation.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"284 ","pages":"Article 122279"},"PeriodicalIF":7.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144549653","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":"Deciphering the impact of active aluminum and iron on soil organic carbon stabilization in volcanic and non-volcanic paddy soils of the central highlands of Madagascar","authors":"Tomohiro Nishigaki ,&nbsp;Han Lyu ,&nbsp;Takanori Okamoto ,&nbsp;Hobimiarantsoa Rakotonindrina ,&nbsp;Andry Andriamananjara ,&nbsp;Njato Mickaël Rakotoarisoa ,&nbsp;Aung Zaw Oo ,&nbsp;Tantely Razafimbelo ,&nbsp;Yasuhiro Tsujimoto","doi":"10.1016/j.envres.2025.122277","DOIUrl":"10.1016/j.envres.2025.122277","url":null,"abstract":"<div><div>Understanding the controlling factors of soil organic carbon (SOC) content in tropical rice paddy fields is crucial for improving soil fertility and carbon sequestration. In tropical soil, SOC is primarily stabilized by interactions with active aluminum (Al) and iron (Fe), yet the relative importance of these elements remains unclear. This study aimed to (1) determine key factors of SOC content in paddy fields, and (2) examine the relationship between SOC and Al and Fe, specifically oxalate-extractable Al (Al_ox) and Fe (Fe_ox). We analyzed 306 rice paddy soils (0–15 cm) in six communes in the central highlands of Madagascar, three influenced by volcanic activity. Structural equation modeling revealed that SOC content was significantly and positively correlated with Al_ox + Fe_ox content across volcanic and non-volcanic soils. Al_ox was the primary SOC-controlling factor across all soils, while Fe_ox played a significant role when its relative abundance to Al_ox increased, particularly in non-volcanic soils. This suggests that SOC stabilization depends on the relative proportions of Al_ox and Fe_ox. Additionally, SOC content decreased with increasing soil pH. Overall, these findings underscore the importance of incorporating site-specific geochemical characteristics—particularly the balance between active Al and Fe—into the development of accurate SOC sequestration models for tropical paddy soils.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"284 ","pages":"Article 122277"},"PeriodicalIF":7.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144535087","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}