Chemosphere最新文献

{"title":"Assessing hepatotoxicity induced by co-exposure to chlorpyrifos and deltamethrin in hook snout carp (Opsariichthys bidens Günther): A comprehensive analysis biochemical and molecular response analysis.","authors":"Yancen Lou, Yihan Wang, Nan Huang, Panpan Liu, Kan Shao, Chen Chen, Yanhua Wang","doi":"10.1016/j.chemosphere.2024.143939","DOIUrl":"https://doi.org/10.1016/j.chemosphere.2024.143939","url":null,"abstract":"<p><p>Chlorpyrifos (CLP) and deltamethrin (DTM) are among the most widely utilized organophosphate and pyrethroid insecticides globally. Their simultaneous presence in aquatic environments poses significant threats to fish health and challenges the sustainability of aquaculture practices. Despite their prevalence, the combined toxic effects of CLP and DTM on hook snout carp (Opsariichthys bidens Günther) remain insufficiently understood. In this study, O. bidens were exposed to waterborne treatments of CLP, DTM, or their combination for 30 days, and the biochemical and molecular responses of the liver tissue were systematically assessed. Acute toxicity tests revealed that the combined exposure to CLP and DTM resulted in synergistic toxicity. Significant alterations in the activities of key enzymes, including superoxide dismutase (SOD), catalase (CAT), caspase-3 (CASP-3), and caspase-9 (CASP-9), relative to the control group, demonstrated that co-exposure induced oxidative stress in O. bidens. Additionally, the elevated transcriptional levels of immune-related genes such as cxcl-c1c, il-8, and il-1 suggested a pronounced inflammatory response triggered by the pesticide mixture. Conversely, the significantly reduced expression of p53 and esr indicated that combined exposure disrupted apoptotic regulation and endocrine system function in the fish. In summary, these findings demonstrated that co-exposure to CLP and DTM induced liver damage in O. bidens by impairing antioxidant enzyme activity, disrupting apoptosis regulation, and altering the transcriptional profiles of genes involved in immune and endocrine pathways. These results provided new insights into the physiological and molecular mechanisms of pesticide-induced hepatotoxicity in fish and offered valuable information for evaluating the ecological risks associated with pesticide mixtures in aquatic environments.</p>","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143939"},"PeriodicalIF":0.0,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142873787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of anaerobic digested sludge biochar on soil quality improvement: An insight into mechanisms, microbial composition, and toxicity risk assessment.","authors":"Zhuo Li, Farhan Hafeez, Jing Zhang, Kai Chen, Bizhen Zeng, Feilan Qi, Lan Yang, Hongtao Zhu","doi":"10.1016/j.chemosphere.2024.143948","DOIUrl":"10.1016/j.chemosphere.2024.143948","url":null,"abstract":"<p><p>Biochar is widely acknowledged for its remarkable impact on soil conditioning. However, the influence of different sources of biochar, particularly anaerobic digested sludge biochar (ADBC) derived from anaerobic digested sludge and biochar derived from waste activated sludge, on alkaline soil remains largely unexplored. To address this knowledge gap, a comprehensive field experiment was conducted over a period of 180 days to investigate the effects of ADBC on slightly alkaline soil. This study evaluated various aspects, including soil properties, nutrient content, microbial composition, and soil toxicity. The results demonstrated significant improvements in the quality of alkaline soil following the application of ADBC. Notably, soil pH decreased from 8.24 to 7.5, while conductivity increased from 56.7 μs/cm to 249.0 μs/cm, total organic carbon from 13.5 g/kg to 19.9 g/kg, available nitrogen from 45.5 g/kg to 237.5 g/kg, and available phosphorus from 549.5 g/kg to 1396.7 g/kg. Moreover, ADBC substantially increased the relative abundance of functional bacteria associated with nutrient cycling, such as Proteobacteria, Actinobacteriota, and Bacteroidota. Conversely, the assessment of biotoxicity revealed a decrease in toxicity with increasing preparation temperature and particle size. These findings highlight the promising potential of ADBC for improving the key properties of alkaline and nutrient-poor soils crucial for overall soil productivity.</p>","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143948"},"PeriodicalIF":0.0,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142824107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Genetic analysis of chlorantraniliprole resistance in the non-target bio-control agent Trichogrammachilonis.","authors":"Muhammad Kamran, Muhammad Ahmad, Sarfraz Ali Shad","doi":"10.1016/j.chemosphere.2024.143952","DOIUrl":"10.1016/j.chemosphere.2024.143952","url":null,"abstract":"<p><p>Trichogramma chilonis (Ishii) (Hymenoptera: Trichogrammatidae), a widely used egg parasitoid of lepidopteran pests in various crops, has developed very high levels of resistance when treated with chlorantraniliprole under laboratory conditions. This study assessed and characterized its mode of inheritance, degree of dominance, realized heritability (h²), and cross-resistance. Toxicity bioassays were performed on T. chilonis adults using a dry film residue method. The chlorantraniliprole resistant strain (Chlr-R) of T. chilonis showed >25000-fold resistance as compared with chlorantraniliprole susceptible strain (Chlr-S). The chlorantraniliprole resistance in T. chilonis was characterized as incompletely dominant and governed by multiple autosomal genes. Additionally, the resistance of T. chilonis to chlorantraniliprole shifted from functionally dominant (at lower applied doses) to functionally recessive (at highest applied dose). Parameters regarding the h² of chlorantraniliprole resistance in T. chilonis predicted 10-fold rise in the initial LC₅₀ after 14.28 generations with continuous selections (at h² = 0.24). No obvious cross-resistance to cypermethrin and chlorpyrifos and a very low cross-resistance to flonicamid were detected. These findings are helpful to improve the field-based effectiveness and integration of these wasps with chemical control.</p>","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143952"},"PeriodicalIF":0.0,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142831110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Advanced solar photo-Fenton-like process with directly growing nano-heterojunctions on graphite fiber felt for phenolic wastewater treatment :Synergistically expand the pH activity range and facilitate the Fe(III)/Fe(II) cycle.","authors":"Qianying Zong, Xiaofei Niu, Xin Cheng, Yifan Liu, Cong Liu, Tingyue Shi, Jiapeng Liu, Xiaohong Yang, Wentao Wang, Zikuan Guo, Fengjuan Xiao","doi":"10.1016/j.chemosphere.2024.143980","DOIUrl":"https://doi.org/10.1016/j.chemosphere.2024.143980","url":null,"abstract":"<p><p>Nanoscale FeWO₄/BiVO₄ heterojunctions were directly grown on the graphite fiber felt (GF) with good conductivity to construct a FeWO₄/BiVO₄ @GF solar photo-Fenton like wastewater treatment system. The removal effect of COD from phenolic wastewater and the mechanism of synergistic improvement of wastewater treatment efficiency by this system were investigated. The FeWO₄/BiVO₄ heterojunction prepared by hydrothermal method exhibited higher photoelectric conversion efficiency and solar light utilization rate, thus endowing FeWO₄/BiVO₄ with excellent solar-Fenton like reaction activity.The photo-Fenton activity can be maintained well even within the pH range of 2-8. Loading FeWO₄/BiVO₄ nano-heterojunction on GF helped to increase the contact area between Fenton reagents and wastewater, facilitate the electron transfer on the FeWO₄/BiVO₄ heterojunction and enable the recovery and reuse of the Fenton reagents.Under solar light radiation, the COD removal efficiency of FeWO₄/BiVO₄ @GF/H₂O₂ system in phenolic wastewater was more than 92%. Even after five cycles, the system still exhibited excellent operation stability. FeWO₄/BiVO₄@GF promoted the conversion and cycling of Fe(III)/Fe(II) by accelerating the separation and transport of photogenerated electrons/holes and increasing the concentration of active species, thereby stimulating excellent solar photo-Fenton like activity.The results are significance to the development of green and efficient photo-Fenton process for advanced treatment of industrial wastewater.</p>","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143980"},"PeriodicalIF":0.0,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142866698","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Highly efficient visible-light-driven S-Scheme Graphene bridged MoS₂/Co₃O₄ nanohybrid for the photocatalytic performance of hazardous dye and antibacterial activity.","authors":"Linjer Chen, Chiu-Wen Chen, Cheng-Di Dong","doi":"10.1016/j.chemosphere.2024.143990","DOIUrl":"https://doi.org/10.1016/j.chemosphere.2024.143990","url":null,"abstract":"<p><p>A novel graphene-bridged MoS₂/Co₃O₄ (MCG) nanohybrid was well fabricated by a hydrothermal route. The purpose of valuable and economical S-scheme systems with vigorous interface interactions is pressing to photocatalytic efficiency and efficient utilization. While mighty progress has been created with respect to charge carrier bridges, the charge transferring ability of the facility charge carrier bridges is far from capable owing to lower electrical conductivity. The photocatalytic antibacterial tests were performed with visible light activity, and the results exhibited that the as-prepared MCG nanohybrid with powerful interfacial coupling presented excellent photodegradation performance in comparison with bare MoS₂ and Co₃O₄ samples for the removal of methylene blue (MB) and E-coli with visible light irradiation. In addition, a better photocatalytic MB capability and antibacterial activity of 99.5 % and 100 % are approached through MCG-4 nanohybrid, which is 2.76 and 8.32 folds higher than that of the pristine MoS₂ sample. The PL measurements and EIS analysis also illustrated that MCG-4 nanohybrid possesses a great separation efficiency of photoinduced charge carriers. This work provides a new objective for high-potential S-scheme photocatalysts and their utilization in the field of environmental remediation.</p>","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143990"},"PeriodicalIF":0.0,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142866739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of microplastics on aquatic flora: Recent status, mechanisms of their toxicity and bioremediation strategies.","authors":"Anindita Ghosh Basu, Rita Som Paul, Fayuan Wang, Swarnendu Roy","doi":"10.1016/j.chemosphere.2024.143983","DOIUrl":"https://doi.org/10.1016/j.chemosphere.2024.143983","url":null,"abstract":"<p><p>The accumulation of microplastics (MPs) in aquatic environments has occurred pervasively. The MPs affect almost all the aquatic plants including the aquatic microorganisms, ultimately disturbing the food chain. Aquatic flora attracts MPs due to the formation of several chemical bonds and interactions, including hydrogen bonds, electrostatic, hydrophobic, and van der Waals. Consequently, they hinder plant growth when adsorbed to the plant surfaces. Moreover, the major metabolic processes, including photosynthesis, reproduction, and nutrient uptake, get affected due to the pore-filling of plant tissues and the blockage of sunlight. Subsequently, prolonged exposure to MPs inflicts excessive generation of reactive oxygen species (ROS), ultimately accelerating programmed cell death. However, it has been realized that bioremediation techniques, including phytoremediation, can effectively mitigate MPs pollution by adsorbing or accumulating MPs by 25-80% at the laboratory scale. In this connection, several microorganisms play a vital part in deteriorating MPs due to their ability to form biofilm over the MPs' surface. Additionally, the secretion of extracellular enzymes such as styrene monooxygenase, styrene oxide isomerase, phenylacetaldehyde dehydrogenase, PETase, etc., facilitates the degradation of MPs. Moreover, the inherent ability of plants to adsorb and accumulate MPs can be utilized to manage the MPs in aquatic ecosystems. However, there is a dearth of literature and comprehensive reviews highlighting the potential of bioremediation strategies. Therefore, apart from addressing the impact of MPs on aquatic flora, this article attempts to elucidate the physical and chemical basis of plant-plastic interaction and the potential strategies aquatic flora including microorganisms employ to mitigate plastic pollution.</p>","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143983"},"PeriodicalIF":0.0,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142866741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Particulate Hexavalent Chromium Exposure Induces DNA Double-Strand Breaks and Inhibits Homologous Recombination Repair in Rat and Human Lung Tissues.","authors":"Haiyan Lu, Sandra S Wise, Jennifer H Toyoda, Rachel M Speer, Tayler J Croom-Perez, Idoia Meaza, J Calvin Kouokam, Jamie Young Wise, Gary Hoyle, Ning Chen, John Pierce Wise, Kazuya Kondo, Hiroaki Toba, Hiromitsu Takizawa, John Pierce Wise","doi":"10.1016/j.chemosphere.2024.143982","DOIUrl":"https://doi.org/10.1016/j.chemosphere.2024.143982","url":null,"abstract":"<p><p>Lung cancer is an important human health concern because of its high mortality rate, with many cases caused by environmental chemicals other than tobacco. Particulate hexavalent chromium [Cr(VI)] is a well-established human lung carcinogen, but how Cr(VI) induces lung cancer is poorly understood. Chromosome instability, a hallmark of lung cancer, is considered a major driving factor in Cr(VI)-induced lung cancer. Our previous studies in cultured human lung cells showed that particulate Cr(VI) induces DNA double-strand breaks during the late S and G2 phases of the cell cycle, which are repaired by homologous recombination, one of the main repair pathways of DNA double-strand breaks. Our previous data showed that prolonged exposure to Cr(VI) inhibits homologous recombination repair by targeting RAD51, a key protein that mediates homologous recombination. Therefore, particulate Cr(VI)-induced DNA damage combined with failure of DNA repair can lead to chromosome instability. In this study we translated these results to rat lung tissue and lung tumor tissue from Cr(VI)-exposed workers. Wistar rats were exposed to zinc chromate in a saline solution or saline alone by oropharyngeal aspiration with a single dose repeated weekly for 90 days. We observed DNA double-strand breaks increased in a concentration-dependent manner, but homologous recombination repair decreased in rat lungs after 90 days of exposure. Notably, these effects were more pronounced in bronchioles than alveoli. We also considered these effects in Cr(VI)-associated human lung tumors and observed increased DNA double-strand breaks and reduced RAD51 levels in lung tumor tissue compared with adjacent normal lung tissue. Thus, Cr(VI)-induced induction of DNA double-strand breaks, and inhibition of homologous recombination repair translates from cultured cells to experimental animals, normal lung tissue adjacent to the tumor, and Cr(VI)-associated human lung tumors.</p>","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143982"},"PeriodicalIF":0.0,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142866237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Highly efficient removal of Pb²⁺ from aqueous solution using polyaniline-cobalt composite nanorods: Kinetics, isotherm and mechanistic investigation.","authors":"Madhumita Bhaumik, Arjun Maity, H G Brink","doi":"10.1016/j.chemosphere.2024.143929","DOIUrl":"10.1016/j.chemosphere.2024.143929","url":null,"abstract":"<p><p>Nanosized cobalt (Co) particles exhibit unique chemical, magnetic, electronic, and catalytic properties. Like nanoscale metallic iron, nanostructured Co and its composite nanostructures also show significant potential for the removal of toxic metal cations from water and wastewater. To explore this potential, composite nanorods (CNRs) of nanosized Co immobilized polyaniline (PANI) nanorods (NRs) matrix (PANI-Co CNRs) were synthesized and effectively applied for the treatment of lead ions (Pb²⁺), serving as a model for heavy metal pollutants in water bodies. Physico-chemical characterization of PANI-Co CNRs revealed that weak ferromagnetic Co nanoparticles (NPs) were effectively deposited onto the surface of the PANI NRs. The enhanced surface properties and superior reactivity of PANI-Co CNRs resulted in greater Pb²⁺ removal efficiency compared to their individual components. The adsorption kinetics were notably rapid, with the time required to reach equilibrium varying between 60 and 150 min for initial concentrations ranging from 50 to 150 mg/L, all at a pH of 5.0. The isotherm data revealed an impressive Pb²⁺ adsorption capacity of 1130 mg/g at 25 °C, as determined using the non-linear Langmuir model. Exothermic and spontaneous Pb²⁺ removal process was deduced from the thermodynamic investigations. Among co-contaminating metal ions, only Cu²⁺ ions significantly affected the Pb²⁺ removal performance of the PANI-Co CNRs, implying its possible applications in decontaminating industrial effluent laden with various metal ions. Mechanistic investigation revealed that the treatment process primarily involves the adsorption and precipitation of Pb²⁺ onto the surface of PANI-Co CNRs, followed by its subsequent reduction to form metallic Pb (Pb⁰).</p>","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143929"},"PeriodicalIF":0.0,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142815272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Foliar application of zinc oxide (ZnO) nanoparticles ameliorates growth, yield traits, osmolytes, cell viability, and antioxidant system of Brassica juncea (L.) Czern. grown in lead (Pb) stress.","authors":"Tina Singh, Peer Saffeullah, Shahid Umar","doi":"10.1016/j.chemosphere.2024.143950","DOIUrl":"10.1016/j.chemosphere.2024.143950","url":null,"abstract":"<p><p>Heavy metal stress is one of the exorbitant problems faced by plants. Lead (Pb) stress is one of the prevalent stressors in agricultural fields. Nanofertilizers are being currently employed for mitigating heavy metal stress in plants. This study assessed the suitability of zinc oxide nanoparticles (ZnONPs) in ameliorating Pb stress in Brassica juncea (L.) Czern. var. Pusa Jagannath. The tested plants were grown in pots using a randomized block design, placed in herbal garden of Jamia Hamdard and treated with different amounts of Pb and nanozinc viz. control (T0), 250 ppm ZnONPs (T1), 500 ppm ZnONPs (T2), 1000 ppm ZnONPs (T3), 250 μM Pb (T4), 500 μM Pb (T5), and their combinations i.e. 250 μM Pb and 500 ppm ZnONPs (T6), 500 μM Pb and 500 ppm ZnONPs (T7), 250 μM Pb and 1000 ppm ZnONPs (T8) and 500 μM Pb and 1000 ppm ZnONPs (T9). The plants were tested for variations in morpho-physiological parameters, yield traits, biochemical attributes, antioxidant enzyme activity, and cell viability using confocal microscopy. Maximum dose of Pb (500 μM) decreased morphological and yield traits such as leaf area (-51%), shoot length (-17%), root length (-34%), number of seeds per plant (-73%), weight of the seeds (-35%), pod number (-47%), shoot and root fresh weight by -63% and -56%, along with reduction in total chlorophyll (-12%), carotenoid (-38%) content, nitrate reductase (-64%) activity, total soluble protein (-40%), total soluble sugar (-31%) and antioxidant enzymes (SOD, CAT and APX by -14%, -4%, -15% respectively) in comparison to control. Stress markers like proline (195%) and MDA (266%) were elevated in Pb-treated plants.The increased level of total phenol content (89%) and total flavonoid content (478%) was also noted in Pb treated plants which acted as non-enzymatic antioxidant defense. The foliar application of ZnONPs (1000 ppm) was found to be effective in ameliorating Pb induced stress, as depicted by the increases in root length (43%), shoot length (38%), pod number (46%), seed weight (70%), number of seeds per plant (105%), chlorophyll content (41%), carotenoid content (28%), total soluble protein content (20%), and nitrate reductase activity (59%) in comparison to control. When ZnONPs (1000 ppm) was supplemented in Pb (250 μM) treated plants, antioxidant enzymes (SOD and CAT increased by 83%, and APX by 75%) and stress markers such as proline amplified by 387%, and total soluble sugar (61%), with respect to control. ZnONPs also improved the cell viability under Pb stress as revealed by confocal microscopy. In summary, foliar spray of ZnONPs proved effective in mitigating the Pb-induced stress in mustard which could be an effective strategy to alleviate the deleterious effects of Pb stress (500 μM) in mustard plants so as to realize its sustainable production under abiotic stress.</p>","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143950"},"PeriodicalIF":0.0,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142831109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In situ formed Se-TiO₂ as a highly reusable photocatalyst for selenium reduction and removal from industrial wastewater.","authors":"Aldrich Ngan, Emile Milan, Zi Qi Chen, Christopher C Chan, Azwa Iman, Frank Gu","doi":"10.1016/j.chemosphere.2024.143959","DOIUrl":"https://doi.org/10.1016/j.chemosphere.2024.143959","url":null,"abstract":"<p><p>Selenium (Se) release from anthropogenic activities such as mining, power generation, and agriculture poses considerable environmental and ecological risks. Increasing prevalence and awareness of Se-related issues have driven the development of many innovative Se treatment technologies. Photocatalysis has shown promise towards Se removal from industrial wastewaters with minimal residuals, and is generally considered a low-cost, robust, non-toxic, and potentially solar-powered method. Despite this, its real-world application towards environmental remediation remains extremely limited. This is because research into practical considerations, such as photocatalyst stability and reusability, is often overlooked or understudied in favor of developing academically interesting but impractical materials. In this work, commercial anatase TiO₂ is stress tested through fifteen cycles of reuse towards the photocatalytic reduction and removal of selenate in synthetic mine-influenced brine (SMIB) without washing or regeneration. Remarkably, selenate removal exceeds 99.3% throughout all cycles. In situ Se-TiO₂ heterojunction formation, and changes to its properties including Se loading, particle size, and crystal phase, are characterized through X-ray absorption spectroscopy, scanning transmission electron microscopy, and diffuse reflectance UV/vis, while their effects on catalyst performance are elucidated. This work underscores the importance of catalyst recyclability for practical photocatalytic environmental remediation and discusses the effects of extensive use on photocatalyst performance.</p>","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143959"},"PeriodicalIF":0.0,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142866742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}