Environmental Research最新文献

{"title":"Tracking environmental contamination from multiple sources of per- and polyfluoroalkyl substances","authors":"Gail L. Carlson,&nbsp;Megan Andersen","doi":"10.1016/j.envres.2025.121470","DOIUrl":"10.1016/j.envres.2025.121470","url":null,"abstract":"<div><div>Per- and polyfluoroalkyl substances (PFAS) are widespread environmental contaminants with many sources, including consumer products, industrial discharges from wastewater treatment plants and manufacturing sites, run-off from lands spread with PFAS-laden biosolids, and atmospheric deposition. Central Maine is impacted by all of these PFAS sources and as a result has high levels of environmental contamination in surface water, groundwater, soil and snow. PFAS were found to flow via surface waters from areas with high sludge spreading into nearby towns. Streams had year-round PFAS, but the area's river was contaminated seasonally. The public drinking water supply was impacted, and low-cost and accessible drinking water filtration methods were partially effective at removing PFAS. Restricting one product that contains PFAS, fluorinated ski wax, resulted in an immediate and large decline in snow contamination at a local ski area, one of the first demonstrations of the efficacy of a product ban. This same ski area, however, used contaminated stream water to produce artificial snow in the winter, which contributed to snow contamination and the transfer of PFAS from the stream onto the land.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"276 ","pages":"Article 121470"},"PeriodicalIF":7.7,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143726329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Enrichment of 3rd generation biodiesel/diesel blends with optimum boron oxide for cleaner diesel emissions by multi-objective optimization using RSM","authors":"Ahmet Canan","doi":"10.1016/j.envres.2025.121472","DOIUrl":"10.1016/j.envres.2025.121472","url":null,"abstract":"<div><div>The increasing energy prices and growing scarcity of fossil fuels have contributed to the rising popularity of biodiesel as an alternative fuel for diesel engines. The incorporation of nanoparticles (NPs) into biodiesel/diesel fuel blends significantly contributes to the reduction of emissions by enhancing fuel atomization and decreasing ignition temperatures, which in turn facilitates improved combustion efficiency. Microalgae biodiesel with boron oxide (B₂O₃) NPs has not been evaluated for diesel engine performance. The study introduced B₂O₃ NPs to biodiesel produced from transesterification of 3rd-generation spirulina microalgae oil (SMO) under 500, 1000, 1500, 2000, 2500, and 3000 W engine loads. In the tests conducted to examine the impact on engine performance and emissions, B₂O₃ was added to standard diesel/biodiesel fuel blends in concentrations of 25, 50, and 75 ppm. Then, the optimization of the experimental results was carried out using the response surface methodology (RSM). The optimal operating conditions were achieved with a 1373.68 W engine load and a 49.34 ppm NPs concentration. Under these conditions, the selected output parameters brake thermal efficiency (BTE), brake specific fuel consumption (BSFC), carbon monoxide (CO), carbon dioxide (CO₂), nitrogen oxide (NO_x), hydrocarbon (HC), and smoke were obtained as 17.99 %, 458.38 g/kWh, 0.027 %, 4.84 %, 443.99 ppm, 6.42 ppm, and 18.83 %, respectively. High R² values have indicated the accuracy of the model. As a catalyst, B₂O₃ reduces emissions and improves engine performance.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"276 ","pages":"Article 121472"},"PeriodicalIF":7.7,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143705102","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":"Candidate of low carbon economy concrete: Reinforcing recycled concrete via hybrid fibers","authors":"Chunlei Tan ,&nbsp;Se Cai ,&nbsp;Jianxiang Ding ,&nbsp;Xiaohui Zhang ,&nbsp;Shangsong Han ,&nbsp;Liuyue Su ,&nbsp;Yahao Li ,&nbsp;Lisan Cui","doi":"10.1016/j.envres.2025.121478","DOIUrl":"10.1016/j.envres.2025.121478","url":null,"abstract":"<div><div>Doping fibers are a highly effective method to rescue the weak mechanical properties of recycled concrete (RC). In this study, a complex three-dimensional network structure was constructed by using the unique arrangement and interweaving of three mixed fibers steel fiber (SF), glass fiber (GF), and coir fiber (CF). At the same time, along with the micro-aggregate reaction and pozzolanic reaction of fly ash (FA), the dual advantages of mixed fibers and FA were combined to enhance the mechanical properties of RC, reduce carbon emissions. The effects of FA, SF, GF, and CF on the mechanical properties of RC were discussed using a single-factor test and SEM analysis. An orthogonal test determined the optimal mix ratio, and the synergistic effect of FA, SF, GF, and CF on RC was discussed. Through multiple regression analysis, it was proved the correlation between the compressive strength and flexural strength of hybrid fiber reinforced recycled concrete (HFRC) and FA, SF, GF, and CF. A multiple regression model was proposed to predict the compressive strength and flexural strength of HFRC. Then, HFRC-filled steel tube members were used to measure the bi-directional deviatoric tensile properties to indicate material effectiveness. Finally, the carbon emissions of HFRC are calculated and analyzed. The results show that compared with the control group, the compressive and flexural strengths are increased by 61.68 % and 15.55 % when the mixing ratio is 1 % FA, 2 % SF, 1 % GF, and 1 % CF. The bearing capacity of HFRC-filled steel tube members under bidirectional bias load is 48.2 % higher than that of ordinary concrete-filled steel tube members. Finally, compared to the same dosage of manufactured sand, the use of construction waste groups reduced carbon emissions.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"276 ","pages":"Article 121478"},"PeriodicalIF":7.7,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143726332","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":"Novel synthesis and application of biochar for controlling release and exposure of mercury in the farmland: From human health risk perspective","authors":"Nathan Thadeo Yoashi ,&nbsp;Che-Jung Hsu ,&nbsp;Ying-Lin Wang ,&nbsp;Po-Hui Wu ,&nbsp;Zheng-Yei Hseu ,&nbsp;Ling-Chu Chien ,&nbsp;Hsing-Cheng Hsi","doi":"10.1016/j.envres.2025.121465","DOIUrl":"10.1016/j.envres.2025.121465","url":null,"abstract":"<div><div>Mercury (Hg)-contaminated farmlands have received wide attention because of the adverse risks posed to food security and human health. In addition, climate change altered the mobility of Hg in the soil, limiting soil productivity and nutrient bioavailability, hence elevating health risks. To adapt to these risks, pot experiments were employed to showcase the impacts of single-pyrolytic synthesized biochar with nitrogen and phosphorus impregnation (NPBC) on the nutrient accessibility, Hg immobilization, and human health risks, compared to pristine and control groups. Results revealed that, with increased surface area and abundant function groups, impregnation amplified bulk nitrogen, phosphorus, and oxygen content from 0.47, 0.25, and 9.47 % to 3.01, 4.50, and 21.4 %, respectively. The pot experiments indicated the effectiveness of NPBC900 in immobilizing soil Hg, hence reducing <em>Brassica rapa chinensis</em>’ Hg uptake by 88 %. Notably, NPBC transformed ∼93 % of water soluble and exchangeable Hg species to stable fractions, enhancing the residue concentration three-fold higher than the control. Additionally, NPBC700-900 showcased characteristic phosphorus and nitrogen slow-release (best at NPBC900 and NPBC500, respectively; 5 %) contributing to controlled soil available nutrients. Hg bioaccessible fraction exhibited a notably higher level (1.7 mg kg⁻¹) in the control group measured against BC (0.8 mg kg⁻¹) and NPBC treatments (∼0.1 mg kg⁻¹). Through dietary and soil ingestion pathways, NPBC900 treatment demonstrated the best health risk reduction for farmers and the public by ∼93 and 69 %, respectively. With versatile capabilities, NPBC emerges as a practical, green, and sustainable alternative in Hg remedy technologies, a breakthrough for climate change adaptation.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"276 ","pages":"Article 121465"},"PeriodicalIF":7.7,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143707976","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":"Mechanistic insights into the oxidative degradation of amine-containing CO2 adsorbents","authors":"Imen Abidli ,&nbsp;Bahoueddine Tangour ,&nbsp;Abdelhamid Sayari","doi":"10.1016/j.envres.2025.121445","DOIUrl":"10.1016/j.envres.2025.121445","url":null,"abstract":"<div><div>One of the most challenging issues for large-scale implementation of amine-containing adsorbents for CO₂ capture, is their propensity to oxidative degradation via radical mechanisms. The nature of the early (primary) oxidation species depends on whether the deactivation took place under humid or dry, aerobic or anaerobic conditions. The current theoretical investigation provides new insights into the reaction mechanisms for such degradation products, specifically imine, aldehyde and CO₂, depending on the radical species involved, and the deactivation conditions. A common radical to all reactions referred to as αC^•, corresponds to the abstraction of a hydrogen atom from the α-position with respect to an amine group. In dry anaerobic environment, imine formation involving organic radicals R^• generated thermally, has an activation barrier of 13.54 kcal mol⁻¹. In humid anaerobic environment, the imine formation in the presence of hydroxyl radicals (HO^•) corresponded to much lower activation barriers than organic radicals. However, the generation of HO^• radicals would be difficult in the absence of oxygen. Hydroperoxyl radicals (HOO^•) occur only in the presence of oxygen, but their formation is facilitated in the presence of humidity. Oxidation of amine to aldehyde occurs in two stages, involving oxygen atom implantation on α-carbon, then the formation of aldehyde and ammonia. In dry aerobic conditions, oxygen implantation involving HOO^• has a high activation energy of 19.60 kcal mol⁻¹, while the subsequent reaction into aldehyde has a very low barrier of 2.38 kcal mol⁻¹. In contrast, in humid anaerobic environment, both steps occur in the presence of HO^• radicals, with a much lower activation barrier for the first step than the latter (1.52 vs. 22.34 kcal mol⁻¹). More importantly, under humid aerobic condition, amine oxidation is accelerated as HO^• and HOO^• play complementary roles, with the former facilitating oxygen implantation, while the latter is involved in the carbonyl formation.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"275 ","pages":"Article 121445"},"PeriodicalIF":7.7,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143690686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Associations between self-reported consumption of foods and serum PFAS concentrations in a sample of pregnant women in the United States","authors":"Nicole M. DeLuca ,&nbsp;Kent Thomas ,&nbsp;Thomas J. Luben ,&nbsp;Lisa Jo Melnyk","doi":"10.1016/j.envres.2025.121461","DOIUrl":"10.1016/j.envres.2025.121461","url":null,"abstract":"<div><div>Data from the National Children's Study (NCS) Initial Vanguard pilot study (IVS) provided an opportunity to assess relationships between environmental and other exposures and maternal and children's health. Women who participated in the IVS pilot generally had at least one home visit during pregnancy to collect biomonitoring specimens, environmental samples, and questionnaire data. Serum per- and polyfluoroalkyl substances (PFAS) including Perfluorooctanoic acid, Perfluorooctanesulfonate, Perfluorononanoic acid, Perfluorohexanesulfonate, Perfluorodecanoic acid, and 2-(N-Methyl-perfluorooctane sulfonamido acetate (PFOA, PFOS, PFNA, PFHxS, PFDA, Me-PFOSA-AcOH, respectively) were analyzed in serum samples from 374 women who also completed a food frequency questionnaire (FFQ) to investigate associations between food consumption during pregnancy and PFAS exposure. Tests of difference were performed between participants who reported either having eaten or not eaten particular types of foods within the 3 months prior to pregnancy. Serum levels of PFHxS, PFNA, and PFDA were positively significantly associated with consumption of several foods. For example, increased frequency of shellfish consumption and increased proportion of seafood in the diet were both associated with significantly higher concentrations of PFNA and PFDA. Consumption of potatoes, soft drinks, beef mixtures, bagels, English muffins, and cold cereals were positively significantly associated with serum levels of PFHxS. Me-PFOSA-AcOH significantly decreased with increasing frequency of consumption of sweet peppers, non-fried fish, and tofu. Clustered dietary patterns show chemicals in serum had statistically significant (p &lt; 0.1) associations with Me-PFOSA-AcOH, PFDA, and PFHxS. These results indicated that some foods eaten by pregnant women may have contributed to the levels of PFAS in their blood.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"276 ","pages":"Article 121461"},"PeriodicalIF":7.7,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143690639","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":"Phytoremediation strategies for the reclamation of tailings and mining soils in an active open-pit site","authors":"Ana María Díaz ,&nbsp;Rubén Forján ,&nbsp;José Luis R. Gallego ,&nbsp;Lucía Benavente-Hidalgo ,&nbsp;Alicia Sánchez-Poyal ,&nbsp;Pamela Díaz-García ,&nbsp;J.M. Menéndez-Aguado ,&nbsp;Diego Baragaño","doi":"10.1016/j.envres.2025.121464","DOIUrl":"10.1016/j.envres.2025.121464","url":null,"abstract":"<div><div>This study evaluated two phytoremediation strategies at an active open-pit mining site within a dunite deposit, an ultramafic igneous rock rich in nickel. The strategies included phytostabilization for tailings, which are fine fractions resulting from rock processing, and phytoextraction for mining soil, composed of natural soil aggregates mixed with fine dunite fragments. Tailings had an alkaline pH (8.8), low organic matter content (9.4 g kg⁻¹), and high available Ni concentrations, requiring immobilization using compost, vermicompost, biochar, and vermichar. These amendments were tested in 1-kg pots over 180 days, assessing soil properties, plant growth, and Ni accumulation in <em>Lolium perenne</em> L. In contrast, mining soil showing a more neutral pH (7.6), higher organic matter (106 g kg⁻¹), and also high available Ni contents, underwent phytoextraction supported by EDTA and citric acid in a parallel experiment.</div><div>Phytostabilization with compost, vermicompost, and vermichar significantly reduced available Ni (&lt;5 mg kg⁻¹), improved plant growth, and increased labile carbon, whereas biochar was less effective. Vermicompost proved particularly beneficial, enhancing nutrient and carbon availability, minimizing Ni leaching, and preventing excessive accumulation in plant aerial parts. Meanwhile, phytoextraction was successfully implemented without altering soil properties, with EDTA boosting Ni accumulation in aerial biomass up to 400 mg kg⁻¹, outperforming citric acid.</div><div>These findings highlight the adaptability of phytoremediation, demonstrating the successful application of both strategies in the same environment, with <em>Lolium perenne</em> L. functioning either as a metal accumulator or a phytostabilizing plant depending on the amendments used.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"275 ","pages":"Article 121464"},"PeriodicalIF":7.7,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143699286","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":"Effects of biofertilizers on nonsymbiotic nitrogen fixation in different paddy soils","authors":"Qiong Xu ,&nbsp;Mengyuan Hu ,&nbsp;Shengwen Xu ,&nbsp;Stanley Chukwuemeka Ihenetu ,&nbsp;Xunqi Chen ,&nbsp;Yaying Li ,&nbsp;Huaiying Yao","doi":"10.1016/j.envres.2025.121416","DOIUrl":"10.1016/j.envres.2025.121416","url":null,"abstract":"<div><div>The excessive application of chemical nitrogen fertilizers to paddy fields has led to numerous environmental problems. Nitrogen-fixing biofertilizers are adequate substitutes for chemical nitrogen fertilizers. In this study, two representative paddy soils (HH and SH) in China with significant differences in their nitrogen fixation activities and physicochemical properties were selected. The effects of 11 kinds of commercial nitrogen-fixing biofertilizers on the properties, nonsymbiotic biological nitrogen fixation activities and <em>nifH</em> gene abundance of the soil were assessed. The results revealed that different biofertilizers exerted distinct effects on the biological nitrogen fixation (BNF) rate and <em>nifH</em> gene abundance of these soils. The BNF rates of HH soil and SH soil ranged from 10.35 to 21.95 μg kg⁻¹·d⁻¹ and from 2.53 to 35.27 μg kg⁻¹·d⁻¹, respectively. The highest increase in BNF was 80.87 % in HH soils and more than tenfold in SH soils. Mo is a component of nitrogen-fixing enzymes, and the results showed that Mo content was positively correlated with the rate of nitrogen fixation in SH soils, which was the most important factor affecting the rate of nitrogen fixation. Application of biofertilizers with high Mo content in Mo-deficient paddy soils may be an effective measure to increase soil N input. The size of the nitrogen-fixing strain population in the 11 biofertilizers ranged from 2.6 × 10³ to 1.2 × 10⁸ CFU g⁻¹, and 32 strains were identified by 16S rRNA gene sequencing. Strains B4 (<em>Pantoea wallisii</em>), B5 (<em>Pantoea anthophila</em>), and B8 (<em>Bacillus paralicheniformis</em>) had the highest BNF rates in nitrogen-free medium. This study elucidated the contributions of various commercial biofertilizers to nonsymbiotic nitrogen fixation in paddy soils and revealed the underlying mechanisms. These findings provide a theoretical foundation for the development and practical application of biofertilizers, and will inform strategies to increase the efficacy of biofertilizers in agricultural settings.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"275 ","pages":"Article 121416"},"PeriodicalIF":7.7,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143690661","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":"Forest mycorrhizal types mediated environmental controls on global particulate and mineral-associated organic matter storage","authors":"Luping Ma ,&nbsp;Zhaoyong Shi ,&nbsp;Manman Jing ,&nbsp;Jiakai Gao ,&nbsp;Shanwei Wu ,&nbsp;Shuangshuang Wang","doi":"10.1016/j.envres.2025.121459","DOIUrl":"10.1016/j.envres.2025.121459","url":null,"abstract":"<div><div>Most trees associate with arbuscular mycorrhizal (AM) or ectomycorrhizal (ECM) fungi, which increases the input to soil carbon pools. Identifying the regulatory mechanisms of mycorrhizal fungi on environmentally controlled global forest total SOM storage is crucial for understanding the global carbon cycle and addressing climate change. Currently, we lack a comprehensive understanding of how mycorrhizae regulate forest total SOM storage, especially regarding POM and MAOM. This study is based on published data and aims to elucidate the regulatory role of different mycorrhizal types on environmentally controlled POM and MAOM storage by analyzing data from 81 AM to 124 ECM forest sites worldwide. The dataset included 718 sets of organic matter fractions (POM, MAOM, total SOM), climate factors (MAT, MAP-PET), soil factors (pH, sand, silt, clay), and matter inputs (i.e., net primary production [NPP]). We used variance partitioning analysis (VPA), stochastic gradient boosting, and path analysis in R to assess the relative importance of these variables. Significant differences in total SOM storage between AM and ECM forests were found, primarily due to variations in MAOM storage. AM forests store more MAOM (8.41 g C kg⁻¹ soil) and total SOM (8.20 g C kg⁻¹ soil) than ECM forests. In ECM forests, climate and soil explained a higher proportion of variation in POM, MAOM, and total SOM storage (40.06–46.70 %) compared to AM forests (17.56–31.20 %). Further analysis indicates that MAOM storage in AM forests is strongly influenced by Clay (21.90 %) and NPP (20.20 %), whereas in ECM forests, it is predominantly affected by MAT (42.90 %) and MAP-PET (23.90 %). In global forest ecosystems, climate and soil are the primary controlling factors, with different mycorrhizal types mediating variations in POM and MAOM storage, which in turn indirectly affect total SOM storage.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"275 ","pages":"Article 121459"},"PeriodicalIF":7.7,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143690664","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":"Photogenerated electron transfer in Ni/NiO supported on g-C3N4 enables sustainable catalytic activation of peroxymonosulfate for emerging pollutant removal","authors":"Runqi Li ,&nbsp;Zhang Liu ,&nbsp;Jingjun Qin ,&nbsp;Kaichun Lin ,&nbsp;Weicheng Xu ,&nbsp;Meng Li ,&nbsp;King Lun Yeung ,&nbsp;Ximiao Zhu ,&nbsp;Jianzhang Fang ,&nbsp;Guangying Zhou ,&nbsp;Zhanqiang Fang","doi":"10.1016/j.envres.2025.121460","DOIUrl":"10.1016/j.envres.2025.121460","url":null,"abstract":"<div><div>Emerging pollutants such as enrofloxacin (ENR), a widely used fluoroquinolone antibiotic, pose significant threats to aquatic ecosystems due to their persistence, bioaccumulation, and toxicity. This study reports the development of a stable and efficient Ni-NiO/g-C₃N₄ heterojunction photocatalyst for ENR degradation under visible light and in the presence of peroxymonosulfate (PMS). The catalyst, synthesized via a templated self-assembly and hydrothermal method, achieved 98.7 % ENR removal within 45 min. Mechanistic studies revealed that the charge transfer along lower energy bands in ternary heterojunctions enhances charge separation and promotes the generation of reactive oxygen species (ROS), including sulfate radicals (SO₄^•–), hydroxyl radicals (•OH), and singlet oxygen (¹O₂). Density functional theory calculations confirmed strong PMS adsorption on the heterojunction of metallic Ni and exposed Ni in NiO, facilitating efficient ROS production and bond polarization for pollutant degradation. The catalyst exhibited remarkable structural stability, maintaining consistent performance over six reuse cycles, attributed to the robust g-C₃N₄ matrix and dynamic redox cycling of Ni/NiO. Toxicity assessments showed significant detoxification of ENR into less harmful byproducts, emphasizing the environmental safety of the process. This work demonstrates the potential of the Ni-NiO/g-C₃N₄/PMS system as a sustainable and scalable approach to address the challenges posed by emerging pollutants in aquatic environments. The research highlights the significance of integrating photocatalysis and PMS activation for advanced oxidation processes, offering an effective pathway to mitigate antibiotic pollution and its ecological impact and can contribute to the development of next-generation catalysts for environmental remediation.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"275 ","pages":"Article 121460"},"PeriodicalIF":7.7,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143699285","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}