Environmental Research最新文献

{"title":"Sorption and dissipation of current-use pesticides and personal-care products on high-density polyethylene microplastics in seawater","authors":"M.M. García-Pimentel,&nbsp;V. Moltó,&nbsp;B. Fernández-Galindo,&nbsp;J.A. Campillo,&nbsp;V.M. León","doi":"10.1016/j.envres.2025.121887","DOIUrl":"10.1016/j.envres.2025.121887","url":null,"abstract":"<div><div>Sorption kinetics and the desorption of three current-use pesticides (CUPs: methyl-chlorpyrifos - m-CPF -, pendimethalin and propyzamide) and three personal-care products (PCPs: triclosan - TCS-, tonalide and galaxolide) on high-density polyethylene (HDPE) in seawater were characterised in this study. Sorption kinetic equilibrium and mass balance were determined for all contaminants, evidencing simultaneous dissipation processes (degradation, volatilization, etc.) after 72 h, particularly for propyzamide, pendimethalin, galaxolide and tonalide. However, they were lower than 24 % for TCS and m-CPF, getting the steady-state for all considered analytes in 24 h. The concentration of contaminants sorbed on HDPE increased with the hydrophobicity from 13.9 ng g⁻¹ to 35.1 ng g⁻¹ for m-CPF and TCS, respectively. No clear effect of temperature was observed for m-CPF sorption, and apparently the sorption of TCS was higher at 15 °C than at 25 °C, but it can be affected by the higher dissipation at 25 °C for this compound. This study confirmed the desorption of TCS and m-CPF from HDPE, being higher than 30 % in all cases during the first 24 h, especially for the highest tested concentrations (200 ng L⁻¹). Sorption of TCS and m-CPF were favoured (4–7 times) on HDPE with the highest specific surface (estimated in an increase of 49-fold times).</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"280 ","pages":"Article 121887"},"PeriodicalIF":7.7,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144124326","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":"Enhanced biogenic manganese oxide production and the removal of Cd(II) and ciprofloxacin via fungus-bacterium co-cultivation","authors":"Mei Wang ,&nbsp;Zuxin Xu ,&nbsp;Jingjing Qiu ,&nbsp;Bin Dong","doi":"10.1016/j.envres.2025.121899","DOIUrl":"10.1016/j.envres.2025.121899","url":null,"abstract":"<div><div>Microbial co-cultivation is a promising strategy for enhancing metabolite production and functional capabilities. While most research on biogenic manganese (Mn) oxidation (BMO) has focused on individual bacterial or fungal strains, the potential benefits of fungal-bacterial co-cultivation remain largely unexplored. In this study, the synergistic effects of co-culturing the Mn-oxidizing fungus <em>Cladosporium</em> sp. XM01 with the Mn-oxidizing bacterium <em>Bacillus</em> sp. XM02 on Mn(II) oxidation were systematically investigated. The results showed that co-cultivation significantly increased total cell biomass and enhanced Mn(II) removal. Optimal conditions were achieved by introducing strain XM02 with a 36 h delay and maintaining a co-culturing ratio of 2:1 (XM01:XM02). The enhanced Mn(II) oxidation observed in the co-culture system was attributed to increased activities of superoxide dismutase and catalase, which help maintain redox homeostasis and sustain the production of superoxide—an essential oxidant in Mn(II) bio-oxidation. Scanning electron microscopy revealed that <em>Bacillus</em> sp. XM02 cells were attached to the hyphae of <em>Cladosporium</em> sp. XM01, forming structured fungal-bacterial aggregates. These aggregates suggest strong physical interactions that likely facilitated nutrient exchange and metabolic cooperation. Additionally, removal kinetics experiments showed that BMO produced in the co-culture exhibited superior Cd(II) adsorption capacity and ciprofloxacin oxidation performance compared to BMO derived from pure cultures. This enhancement was linked to the higher specific surface area and increased average oxidation state (Mn-AOS) of the co-culture BMO, which enhanced its adsorption and oxidative reactivity. These findings provide new insights into the symbiotic interactions among Mn-oxidizing microorganisms and highlight the potential of fungal-bacterial co-cultures as an effective strategy to enhance BMO functionality for environmental remediation.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"280 ","pages":"Article 121899"},"PeriodicalIF":7.7,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144118417","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":"Enhanced oxidation ability in SnO2/Pt-B-g-C3N4 towards 2,4-dichlorophenol removal","authors":"Shuangyu Wang ,&nbsp;Xiao Zhang ,&nbsp;Yi Tian ,&nbsp;Ping Yang","doi":"10.1016/j.envres.2025.121910","DOIUrl":"10.1016/j.envres.2025.121910","url":null,"abstract":"<div><div>Heterostructure type and valence band (VB) and conductor band (CB) potential governs the redox ability of photocatalysts, in which enhanced oxidation is a key for phenol degradation. To increase the photocatalytic oxidation ability of catalysts, broad band gap SnO₂ was grown on Pt-decorated superior thin B-doped g-C₃N₄ (BCN) nanosheets for 2,4-dichlorophenol (2,4-DCP) removal. B-doped g-C₃N₄ nanosheets were created by a two-step thermal polymerization. Small Pt nanoparticles were grown on B-g-C₃N₄ nanosheets, in which B-doping resulted in the homogeneous distribution of Pt nanoparticles of 2–3 nm. These small Pt nanoparticles further supported the deposition of SnO₂ nanoparticles with small sizes of 4–7 nm and narrow distribution by solvothermal synthesis to create SnO₂/Pt/B-g-C₃N₄ heterostructures with well-developed interface and homogeneous component distribution. The much positive VB of SnO₂ improved the oxidation of photogenerated holes. These heterostructure catalysts revealed a 2,4-DCP t removal rate of 90.5 % at a concentration of 70 mg/L. The removal efficiency of 2,4-DCP was further increased in peroxydisulfate (PDS) system, and 2,4-DCP of 98 % was finally degraded. The well charge carrier transfer ability of SnO₂ and Z-scheme heterostructure formation with fine Pt nanoparticles decreased the photogenerated charge carrier recombination. The photocatalytic mechanism and degradation procedure of 2,4-DCP in PDS system were systemically discussed. The oxygen vacancies in SnO₂ components allow accelerated charge carrier transfer and promote the degradation of the pollutants. These results supply a utilizable way for improving the redox ability of catalysts and the application in pollution degradation in low-cost PDS-activated systems.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"279 ","pages":"Article 121910"},"PeriodicalIF":7.7,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144107386","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":"Bifunctional chitosan-modified urea–formaldehyde fertilizer for soil restoration and slow, sustained nitrogen release","authors":"Zhenglu Yang,&nbsp;Biao Yuan,&nbsp;Pan Wu,&nbsp;Jian He,&nbsp;Changjun Liu,&nbsp;Wei Jiang","doi":"10.1016/j.envres.2025.121902","DOIUrl":"10.1016/j.envres.2025.121902","url":null,"abstract":"<div><div>Nutrient supply and heavy metals (HMs) remediation are key for agricultural development. However, achieving both goals with a single agent is challenging. In this study, bifunctional chitosan-modified urea–formaldehyde (CSUF) gel beads having a three-dimensional structure were developed to serve as a slow-release nitrogen fertilizer and a HM fixative for soil treatment. The adsorption capacities for Cd(II), Cu(II), and Cr(VI) reached 49.8, 6.63, and 40 mg/g, respectively. Further, over 10 d, CSUF removed 86 %, 93.28 %, and 91.32 % of Cd(II), Cu(II), and Cr(VI), respectively, from the soil while releasing 40 % of the nitrogen. Crucially, the adsorbed HM ions were not re-released, although the nitrogen continued to be released for 15 d. Plant growth experiments indicated that CSUF promoted mung bean sprout growth, increasing the dry and fresh weights by 33.33 % and 47.83 %, respectively, and significantly mitigating HM stress effects by reducing the Cd(II), Cu(II) and Cr(VI) content in the plant tissue by 89.28 %, 92.08 %, and 94.97 %, respectively. Overall, the bifunctional fertilizer shows potential for promoting sustainable agriculture.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"279 ","pages":"Article 121902"},"PeriodicalIF":7.7,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144098976","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":"Large effects of extreme rainfall event on dissolved carbon in a subtropical karst river in South China","authors":"Xing Li ,&nbsp;Xingyu Lu ,&nbsp;Yuhan Xu ,&nbsp;Siyue Li ,&nbsp;Qiuying Zhang","doi":"10.1016/j.envres.2025.121906","DOIUrl":"10.1016/j.envres.2025.121906","url":null,"abstract":"<div><div>The dynamics of dissolved organic and inorganic carbon (DOC and DIC) in subtropical rivers within karstic catchment exhibit pronounced sensitivity to rainfall intensity, particularly under extreme hydrologic forcing. Because the South China Sea receives 6.2–10.3 % of global riverine carbon fluxes, resolving the mechanistic links between rainfall regimes and carbon dynamics in this climate-sensitive region is critical for constraining global land-ocean carbon budgets. Through sampling across dry seasons, monsoon periods, and typhoon events in a representative South China karstic catchment, we demonstrate three rainfall-intensity-dependent carbon pathways. Extreme rainfall triggered rapid terrestrial-aquatic carbon transporting, elevating DOC concentrations by 40–174 % (mean: 13.4 mg/L). Fresh, bioavailable dissolved organic matter (DOM) dominated these pulses, evidenced by fluorescence index (FI: 1.98–2.16), biological index (BIX: 0.71–1.03), and higher protein-like components (41–63 %). Concurrently, shortened water residence times suppressed carbonate weathering, yielding ¹³C-depleted DIC (δ¹³C-DIC: −24.9 ‰ to −18.8 ‰, HCO₃⁻: 33.8–67.7 mg/L) in riverine systems. Sustained moderate rainfall facilitated complete carbonate dissolution (δ¹³C-DIC enrichment to a mean value of −13.6 ‰, HCO₃⁻: 38.0–65.7 mg/L) through prolonged water-rock interaction. Microbial metabolism degraded labile DOC (FI: 1.69–1.81; protein-like component: 0–48.6 %), leaving recalcitrant humic substrates (SUVA₂₅₄: 2.3–7.2 L/mgC/m) and lower DOC concentrations (mean: 4.9 mg/L). Dry-season baseflow exhibited algal-mediated carbon cycling: photosynthetic DIC uptake enriched δ¹³C-DIC (−16.7 ‰ to −8.3 ‰), while autochthonous DOC production maintained moderate levels (mean: 9.5 mg/L), evidenced by a higher slope ratio (S_R: 0.88–1.46). These findings establish a rainfall intensity-carbon speciation matrix, revealing that hydrologic extremes prioritize rapid DOC transfer over DIC generation, moderate rains maximize weathering-derived DIC, and baseflow sustains aquatic carbon release. This study highlights the sensitive response of DOC and DIC to rainfall events in subtropical rivers, providing new insights into the processes governing terrestrial-to-aquatic carbon dynamics in subtropical karst systems.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"279 ","pages":"Article 121906"},"PeriodicalIF":7.7,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144118418","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":"Spatiotemporal evolution of land use and carbon storage in China: Multi-Scenario simulation and driving factor analysis based on the PLUS-InVEST model and SHAP","authors":"Haojuan Li ,&nbsp;Kun Zhang ,&nbsp;Yongqiang Liu ,&nbsp;Yan Qin ,&nbsp;Weiping Wang ,&nbsp;Mingyu Wang ,&nbsp;Yongnan Liu ,&nbsp;Yaqian Li","doi":"10.1016/j.envres.2025.121860","DOIUrl":"10.1016/j.envres.2025.121860","url":null,"abstract":"<div><div>The spatiotemporal distribution of land use/cover changes (LUCCs) and carbon storage (CS), as well as their driving factors under global climate change, have become key issues in ecological and environmental sciences. As a major contributor to global CS, understanding China's CS changes and the driving forces is crucial for addressing climate change and achieving carbon neutrality. In the study, China is split into seven major ecological zones, and a combined model is suggested that uses the CMIP6 climate scenarios (SSP1-2.6, SSP2-4.5, SSP5-8.5) along with the PLUS and InVEST models. The study systematically analyzes the spatiotemporal evolution of land use and CS from 1990 through 2020 and predicts the changes under three future scenarios for 2030 and 2050. Using Random Forest and SHAP methods, the study quantifies the impact weights of natural and anthropogenic factors on CS. The main findings are as follows: (1) From 1990 to 2020, China's CS showed a steadily increasing trend, but with significant regional differences. The Qinghai-Tibet Plateau is the largest CS area, accounting for 26.96 % of the national total CS in 2020, while the highly urbanized and densely populated South China region has the lowest CS share, only 4.39 %. (2) Under the SSP1-2.6 scenario, CS will be highest in 2030 and 2050, reaching 1.003 × 10¹¹ t and 1.026 × 10¹¹ t, respectively, with growth rates of 3.33 % and 5.79 % compared to 2020. Under the SSP5-8.5 scenario, CS shows a downward trend, with 9.31 × 10¹⁰ t and 9.32 × 10¹⁰ t in 2030 and 2050, respectively, corresponding to a decrease of 4.01 % and 3.91 % compared to 2020. The SSP2-4.5 scenario predicts relatively stable CS. (3) Natural and anthropogenic factors are the primary drivers of the spatiotemporal changes in CS. The importance of these factors varies across different regions. The study provides scientific insights for ecological protection and carbon neutrality policy formulation.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"279 ","pages":"Article 121860"},"PeriodicalIF":7.7,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144107701","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":"Beta-amyloid deposition increases in the brain with the progression of silicosis: a [18F] AV45 PET study in mice","authors":"Zekuan Yu ,&nbsp;Mengwen Ye ,&nbsp;Jiacheng Yang ,&nbsp;Weiqiang Chen ,&nbsp;Wei Fu ,&nbsp;Lei Zhang ,&nbsp;Jun Liu ,&nbsp;Mengkun Shi ,&nbsp;Yahui Chen ,&nbsp;Xiangguang Shi","doi":"10.1016/j.envres.2025.121898","DOIUrl":"10.1016/j.envres.2025.121898","url":null,"abstract":"<div><div>Occupational silicosis caused by long-term inhalation of silica is a serious public-health problem in the world and is known to be a risk factor for the development of dementia. However, the progression of silicosis, including its impact on the brain and its relationship with β-Amyloid (Aβ), the early biomarker of Alzheimer's disease, remains unclear. In this study, we categorized silicosis into four stages in a mouse model and employed [¹⁸F] AV45 PET imaging to quantify Aβ deposition across 19 cerebral sub-regions. We compared the differences in Aβ accumulation across various stages of silicosis and observed a significant increase in Aβ deposition in key brain areas such as the cortex and olfactory bulb, correlating with the severity of lung fibrosis. Notably, Aβ accumulation was also detected in the ocular region, indicating its potential as a non-invasive biomarker for cognitive impairment. These findings highlight a direct link between pulmonary health and neurodegeneration, suggesting that occupational exposure may lead to structural brain changes and cognitive decline. The study underscores the importance of managing silicosis to mitigate its neurological impacts, providing insights into the systemic effects of occupational hazards on brain health and emphasizing the need to monitor these risks to prevent cognitive decline.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"279 ","pages":"Article 121898"},"PeriodicalIF":7.7,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144107702","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":"Prenatal exposure to arsenic, umbilical cord blood DNA methylation, and child neurodevelopment: A prospective birth cohort study","authors":"Yiqing Lv ,&nbsp;Xiaomei Chen ,&nbsp;Zhenxian Jia ,&nbsp;Yin Wang ,&nbsp;Zhiqiang Zhu ,&nbsp;Chengxi Li ,&nbsp;Shunqing Xu ,&nbsp;Yuanyuan Li","doi":"10.1016/j.envres.2025.121914","DOIUrl":"10.1016/j.envres.2025.121914","url":null,"abstract":"<div><div>Prenatal Exposure to Arsenic (As) is associated with child neurodevelopment disorders. However, the specific mechanisms involved remain unclear. This work intends to investigate the associations between prenatal As exposure and epigenome-wide Deoxyribo Nucleic Acid methylation (DNAm) and evaluate the role of DNAm in moderating the association between prenatal As exposure and child neurodevelopment. An As-related epigenome-wide DNAm association analysis was performed using robust linear models, and mediation analysis was further applied to explore potential DNAm mediators. Robust linear models were applied to perform an epigenome-wide association study (EWAS) for DNAm related to As exposure. Mediation analysis was subsequently conducted to explore potential DNAm mediators. The mental development index (MDI) score was found to be inversely associated with urinary As levels during the third trimester [β = −3.52, 95 % CI: −6.34, −0.71]. A total of 48 differential DNAm locations and 4 differentially methylated regions were found to be associated with urinary As concentration. Three cytidylyl phosphate guanosine positions (annotated to <em>ARMC5</em>, <em>KIAA1217</em>, and intergenic region, mediated proportion is around 30 %) mediated the association between urinary As and a reduction of MDI score (<em>P</em> &lt; 0.05). Our findings indicated adverse effects of prenatal As exposure on child neurodevelopment, and specific DNAm played the role of partial mediator.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"280 ","pages":"Article 121914"},"PeriodicalIF":7.7,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144118419","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":"Electrochemical degradation of toluene-2,4-diamine by graphene oxide-modified Ti/Sb-SnO2/α-PbO2/β-PbO2 anode: Performance and mechanism","authors":"Shuaishuai Man ,&nbsp;Jun Zhang ,&nbsp;Hebin Bao ,&nbsp;Yifan Ge ,&nbsp;Youcun Bai ,&nbsp;Xinyu Liu ,&nbsp;Ziyang Li ,&nbsp;Liwei Qiu ,&nbsp;Zhenzhen Zhao ,&nbsp;Qun Yan","doi":"10.1016/j.envres.2025.121903","DOIUrl":"10.1016/j.envres.2025.121903","url":null,"abstract":"<div><div>The formidable toluene-2,4-diamine (TDA), a potential human carcinogenic pollutant, environmental challenge necessitates investigating an efficient technology and clarifying its removal mechanism. Accordingly, we prepared a graphene oxide-modified PbO₂ anode (Ti/Sb-SnO₂/α-PbO₂/GO-β-PbO₂) to degrade TDA using electrochemical oxidation technology given its high oxidation capacity and green feature. The Ti/Sb-SnO₂/α-PbO₂/GO-β-PbO₂ attained 100 % TDA and 82.7 % COD removal efficiency after 3.0 h electrolysis for its high oxygen evolution overpotential (2.08 V <em>vs.</em>SCE), superior ⋅OH generation capacity, and hydrophobic surface (121.2°). The quenching experiments and EPR tests all confirmed the vital role of both ⋅OH and SO₄^·-, resulting in the oxidation of the benzene ring and amino group. Moreover, the (Ti/Sb-SnO₂/α-PbO₂/GO-β-PbO₂ also presented an improved stability with the accelerated lifetime prolonged by about 50.8 %. Therefore, this work provides a toolbox for treating TDA wastewater and a good reference for fabricating PbO₂ anode via a facile yet effective method.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"279 ","pages":"Article 121903"},"PeriodicalIF":7.7,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144107703","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":"A novel hybrid machine learning approach for accurate retrieval of ocean surface chlorophyll-a across oligotrophic to eutrophic waters","authors":"Ting Qin ,&nbsp;Tianlong Liang ,&nbsp;Donglin Fan ,&nbsp;Hongchang He ,&nbsp;Guiwen Lan ,&nbsp;Bolin Fu","doi":"10.1016/j.envres.2025.121864","DOIUrl":"10.1016/j.envres.2025.121864","url":null,"abstract":"<div><div>Accurate assessment of chlorophyll <em>a</em> (Chla) concentration distribution and variations is significant for environmental monitoring and ecological research. However, the inversion of Chla in different optical types of water bodies can only be achieved by establishing algorithms suitable for different optical types, lacking a machine learning algorithm framework. Therefore, this study focuses on two aspects, input features and data samples, and designs an innovative composite machine learning algorithm framework called Synth Ridge Framework (SRF). The framework mainly consists of two main components: feature expansion and model construction. We employed the band ratio method and BorutaShap for feature expansion and selection. By integrating three gradient boosting decision tree models (XGBoost, LightBoost, and CatBoost) with the MDN ensemble strategy, we constructed a model named SynthRidge, aiming to enhance the model's overall performance. SynthRidge was trained and validated using the Rrs-In situ Chla dataset from the Terra-MODIS sensor, with Chla values ranging from 0 to 50 mg/m³ in both datasets. On mg/m³the validation dataset, the SynthRidge model achieved strong predictive performance, with an R² of 0.930, a slope of 0.928, an RMSE of 4.672 mg/m³, an RMLSE of 0.039, a bias of 1.023, and an MAE of 1.389. Compared to the best-performing baseline model, the GBDT ensemble, SynthRidge demonstrated superior accuracy and robustness. Specifically, it improved the R² by 0.006, increased the slope by 0.020, reduced the RMSE by 0.890 mg/m³, and decreased the RMLSE by 0.003. The validation dataset has its R², Slope, RMSE, RMLSE, Bias, and MAE values of 0.930, 0.928, 4.672 mg/m³, 0.039, 1.023, and 1.389, respectively. The predicted Chla density distribution by SynthRidge was more consistent with the measured values. These findings suggest that SRF is capable of effectively compensating for the limitations of input features, reducing the negative impact of data distribution, and improving the limitations of complex fusion algorithms. Furthermore, the performance of SRF on the SeaWiFS dataset demonstrates its versatility across different sensors.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"279 ","pages":"Article 121864"},"PeriodicalIF":7.7,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144098356","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}