Journal of Environmental Sciences-china最新文献

{"title":"Propanol as electron donor for efficient odd-chain carboxylate production by chain elongation with reactor microbiomes","authors":"Yanshen Zhang ,&nbsp;Bin Liu ,&nbsp;Wanling Wu ,&nbsp;Haopeng Liu ,&nbsp;Wen Wang","doi":"10.1016/j.jes.2024.12.033","DOIUrl":"10.1016/j.jes.2024.12.033","url":null,"abstract":"<div><div>Microbial consortia that catalyze chain elongation processes have been enriched using different selection strategies, for which the electron donor is an essential one. Propanol is an extraordinarily promising electron donor because it can be generated from renewable resources, including lignocellulosic biomass and protein wastes. Here, propanol was proven in detail to be an efficient electron donor, enhancing the production of odd medium-chain carboxylates during chain elongation. By exploring various electron acceptors, reactor conditions, and electron donor/electron acceptor mol ratios, our study highlights that acetate is the most suitable electron acceptor for the production of both odd- and even-chain carboxylates. The optimal conditions for propanol-based chain elongation were 30 °C and pH 6, achieving 82.8 % selectivity for odd-chain carboxylates. Another critical insight from our work is that a propanol/acetate mol ratio of 1:1 can minimize the inhibitory effect of propanol and maximize the yield of medium-chain carboxylates, with the highest concentration of <em>n-</em>heptanoate reaching 124.5 mmol C/L. This was further illustrated by 16S rRNA amplicon sequencing, which elucidated that the community composition and keystone species in a propanol-based reactor closely resembled that of the ethanol one. The dominant phylum of the propanol-based reactor, Firmicutes showed a significant positive correlation with the concentrations of <em>n</em>-caproate and <em>n</em>-valerate. Additionally, the co-occurrence of <em>Clostridium sensu stricto</em> 12 and <em>Oscillibacter</em>, known as typical chain elongators, was identified within the propanol-based reactor. These findings enhance our understanding of propanol-based chain elongation, offer guiding principles for reactor microbiota assembly, and support efficient odd medium-chain carboxylate production.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"156 ","pages":"Pages 849-858"},"PeriodicalIF":5.9,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143843413","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":"Developmental exposure to echimidine induces locomotor hyperactivity in zebrafish larvae via inhibiting acetylcholinesterase activity","authors":"Tingting Lin ,&nbsp;Siyu Chen ,&nbsp;Yingyi Ren ,&nbsp;Junyu Liang ,&nbsp;Zhenghong Zuo ,&nbsp;Zhiqiang Luo ,&nbsp;Jian Yang ,&nbsp;Chengyong He","doi":"10.1016/j.jes.2024.12.036","DOIUrl":"10.1016/j.jes.2024.12.036","url":null,"abstract":"<div><div>Pyrrolizidine alkaloids (PAs) are natural toxins generated as secondary metabolites in plants, predominantly consisting of unsaturated PAs with diverse toxicities, such as hepatotoxicity. Echimidine, a prominent PA, is believed to exert various toxicological effects, including survival inhibition and induction of apoptosis of hepatocytes (<span><span>Gleńsk et al., 2022</span></span>). However, the effects of echimidine on development remain unclear. We selected three concentrations of 0.02, 0.2, and 2 mg/L to investigate the developmental toxicity of echimidine on zebrafish embryos. After a 7-day exposure, we observed hyperactivity and anxiety-like behavior in zebrafish larvae. Furthermore, we found that echimidine exposure significantly promoted embryonic motor neurodevelopment in genetically modified zebrafish. Next, we detected that echimidine exposure significantly increased the content of the excitatory neurotransmitter acetylcholine (ACh), accompanied by a significant decrease in acetylcholinesterase (AChE) activity. Conversely, echimidine led to a significant reduction in the content of the sedative neurotransmitter γ-aminobutyric acid (GABA), accompanied by abnormal gene expression of enzymes related to GABA synthesis. Moreover, we elucidated the strong direct binding of echimidine to zebrafish and human AChE protein through molecular docking. In summary, our study found that echimidine induced ACh accumulation possibly by inhibiting AChE activity, leading to motor neurodevelopmental abnormalities and hyperactivity in zebrafish larvae. This work provides important scientific knowledge on the effects and mechanisms of PAs on neural development, which is helpful for controlling the risk of PAs in food and protecting public health.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"156 ","pages":"Pages 882-893"},"PeriodicalIF":5.9,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143847586","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":"Water-soluble organic nitrogen in PM2.5 around the Danjiangkou Reservoir: Concentration, sources, and transport pathways","authors":"Chunyan Xiao ,&nbsp;Pengbo Li ,&nbsp;Xiaoshu Chen ,&nbsp;Tongqian Zhao ,&nbsp;Xiaoming Guo ,&nbsp;Yuxiao He ,&nbsp;Guizhen Wang","doi":"10.1016/j.jes.2024.12.030","DOIUrl":"10.1016/j.jes.2024.12.030","url":null,"abstract":"<div><div>Water-soluble organic nitrogen (WSON) affects the formation, hygroscopicity, acidity of organic aerosols, and nitrogen biogeochemical cycles. However, qualitative and quantitative characterizations of WSON remain limited due to its chemical complexity. In the study, 1-year field samples of particulate matter 2.5 (PM_2.5) were collected from June 2022 to May 2023 to analyze the WSON concentration in PM_2.5, and correlation analysis, positive matrix factor (PMF), and potential source contribution function (PSCF) models were employed to elucidate WSON source apportionment and transport pathways. The results revealed that the mean WSON concentrations reached 1.98 ± 2.64 µg/m³ with a mean WSON to water-soluble total nitrogen (WSTN) ratio of 21 %. Further, WSON concentration exhibited a seasonal variation trend, with higher values in winter and lower in summer. Five sources were identified as contributors to WSON in PM_2.5 within the reservoir area through a comprehensive analysis including correlation analysis, PSCF and concentration weighted trajectory (CWT), and PMF analyses. These sources were agricultural, dust, combustion, traffic, and industrial sources, of which agricultural source emerged as the primary contributor (76.69 %). The atmosphere in the reservoir area were primarily influenced by the transport of northeastern air masses, local agricultural activities, industrial cities along the trajectory, and coastal regions, exerting significant influences on the concentration of WSON in the reservoir area. The findings of this study addressed the research gap concerning organic nitrogen in PM_2.5 within the reservoir area, thereby offering a theoretical foundation and data support in controlling nitrogen pollution in the Danjiangkou Reservoir area.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"156 ","pages":"Pages 757-770"},"PeriodicalIF":5.9,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143843453","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":"Millimeter-scale interactions of nitrogen and potassium on denitrification, anammox, and Feammox in soil fertilization zones","authors":"Jingjing Lyu ,&nbsp;Rui Tian ,&nbsp;Runhua Zhang ,&nbsp;Peng Chen ,&nbsp;Xinxin Jing ,&nbsp;Runqin Zhang ,&nbsp;Kang Zhao ,&nbsp;Yi Liu ,&nbsp;Chenhao Lyu ,&nbsp;Zhiguo Li","doi":"10.1016/j.jes.2024.12.028","DOIUrl":"10.1016/j.jes.2024.12.028","url":null,"abstract":"<div><div>Soil denitrification, anammox, and Feammox are key for nitrogen (N) removal in agriculture. Despite potassium (K) fertilizer enhancing N efficiency, their role in regulation of these processes is unclear. A soil column incubation with ¹⁵N isotope tracing was conducted to explore millimeter-scale interactions of N and K on these pathways in soil fertilization zones. After 28 days, individual applications of N and K reduced denitrification-nitrogen removal rate (DNRR), anammox-nitrogen removal rate (ANRR), and feammox-nitrogen removal rate (FNRR) compared to a non-fertilizer control. N fertilizer had a greater effect than K, likely due to the high consumption of dissolved organic carbon by N fertilizer or the increased soil organic matter decomposition by K fertilizer. Combing of N and K increased DNRR, ANRR and FNRR rates by 31 %, 3090 % and 244 % compared to single N, and by and by -53.7 %, 885 % and 222 % compared to single K. These effects diminished with depth and distance from fertilizer sites. The effects of N fertilizer on theses N removal process might be regulate abundance of key microbes (e.g., <em>Limnobacter and Clostridium</em>) and key gene (<em>nirK, hzsB, ACM</em> and <em>Geo</em>) by providing N substrates, while K enhances N metabolism efficiency through enzyme activation, indicated by the downregulation of certain genes (<em>hzsB, ACM</em> and <em>Geo</em>) and a negative correlation with N removal by simultaneously increasing gene expression and enzyme activity. These findings provide insights how N and K together enhance N removal, emphasizing their importance for optimizing this process.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"157 ","pages":""},"PeriodicalIF":5.9,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143918343","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":"Sodium alginate-synthesizing regulatory gene algB in Pseudomonas putida XMS-1 decreases Cd uptake in Allium tuberosum in the Cd-polluted soil","authors":"Yanyan Ge,&nbsp;Zhenyu Wen,&nbsp;Xuan Liu,&nbsp;Zhihui Xiong,&nbsp;Xiafang Sheng","doi":"10.1016/j.jes.2024.12.023","DOIUrl":"10.1016/j.jes.2024.12.023","url":null,"abstract":"<div><div>The Cd-tolerant and sodium alginate (SA)-synthesizing <em>Pseudomonas putida</em> XMS-1 was characterized for Cd immobilization in solution. Additionally, the XMS-1 mutant constructed by deleting SA-synthesizing regulatory gene <em>algB</em> (∆<em>algB</em>) were characterized for their roles in Cd uptake in Chinese chive in the Cd-contaminated soil. Between 12 and 48 h of incubation, the XMS-1∆<em>algB</em> mutant significantly reduced solution Cd concentrations by 81 % compared with the control but increased the Cd concentrations by 36 % compared with XMS-1. After 48 h of incubation, the XMS-1∆<em>algB</em> mutant significantly increased the Cd concentration by 36 % and decreased the expolysaccharide (EPS) and SA concentrations by 30 %-32 % and cell surface-adsorbed Cd content by 24 % in the Cd-containing medium, compared with XMS-1. The XMS-1∆<em>algB</em> mutant significantly increased the root and leaf Cd contents of Chinese chive by 15 %-50 % and exchangeable Cd content by 17 % and decreased the Fe-Mn oxide- and organic matter-bound Cd contents by 17 %-23 %, compared with XMS-1. Furthermore, the XMS-1∆<em>algB</em> mutant significantly decreased the EPS content by 33 %, copies of <em>algD</em> gene involved in EPS production by 7.7-fold, and the interactions between the amino, hydroxyl, and carbonyl groups and Cd in the Cd-contaminated soil, compared with XMS-1. These results suggested that <em>algB</em> promoted XMS-1-mediated Cd-stabilizing related gene abundance and interactions between soil and Cd and decreased Cd uptake in Chinese chive. These findings may provide an effective and eco-friendly way using SA-producing bacteria for safe production of vegetables in the Cd-polluted soil.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"157 ","pages":"Pages 52-64"},"PeriodicalIF":5.9,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143863317","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":"Linkage between nitrogen loss, river transport, lake accumulation and water quality properties in plain river network basin","authors":"Zihan Zhao ,&nbsp;Yan Chen ,&nbsp;Chun Ye ,&nbsp;Jing Wu ,&nbsp;Zucong Cai ,&nbsp;Yanhua Wang","doi":"10.1016/j.jes.2024.12.022","DOIUrl":"10.1016/j.jes.2024.12.022","url":null,"abstract":"<div><div>Various forms of nitrogen (N) discharged by high-intensity human activities in the Yangtze River Delta are transported into the lake along the river channel, accelerating the lake's N cycle and increasing the eutrophication ecological risk. Taihu Lake is a typical eutrophic shallow lake, suffering from cyanobacteria blooms for decades due to excessive exogenous nutrient load. In this study, the coupling relationship between basin N loss and lake response was established by combining N flow and exogenous nutrient load. The results showed striking spatiotemporal differences and the large tributaries input the majority of N. Three evolution stages of the lake ecosystem were classified, i.e., Stage A (1980–1997) with slow increasing N load; Stage B (1998–2006) with high-level N load despite some controlling methods; Stage C (2007 to present) with the strengthening of N management in lake basin after the Water Crisis, the N load has gradually decreased, while the water flow is increasing by the year. Environmental N export in the basin was 581.46 kg/ha N in 2021, and a total of 32.06 Gg N was finally drawn into the lake. Over the recent two decades, the noticeable expansion of built-up land from 8.21 % to 21.04 % associated with its environmental impacts i.e., urban heat island effect, hard pavement, and ecological fragility deserves attention. Accordingly, the rapid climate change of the basin became the key factor driving the tributaries' hydrologic conditions (<em>r</em>_∂ = 0.945). The developed social economy dominated the sewage discharge (<em>r</em>_∂ = 0.857). The N inputs and losses to the environment in the basin can be further exacerbated without control. Meanwhile, the lake would respond to the exogenous input. In addition to the self-cleaning part of the lake, the N accumulation rate of the surface sediment ranged from 3.29 to 10.77 g N/(m²·yr) of Taihu Lake. To meet the pollutant control target, around 66.28 Gg anthropogenic N needs to be reduced in the upper stream area yearly. Clarifying the N flow and its environmental burden can mitigate its damage to the ecosystem and take on the refined management on the watershed scale.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"157 ","pages":"Pages 65-76"},"PeriodicalIF":5.9,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869852","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":"New insight into rapid removal of refractory pollutants via efficient charge transfer under visible light","authors":"Songlin Cai ,&nbsp;Ciyuan Huang ,&nbsp;Linji Yang ,&nbsp;Yuchen Wang ,&nbsp;Lingxiao Li ,&nbsp;Shangfei Yao ,&nbsp;Ke Sun ,&nbsp;Caiyun Wang ,&nbsp;Guanhui Tan ,&nbsp;Tao Yang ,&nbsp;Shengjie Wang ,&nbsp;Bingsuo Zou ,&nbsp;Tao Liu","doi":"10.1016/j.jes.2024.12.019","DOIUrl":"10.1016/j.jes.2024.12.019","url":null,"abstract":"<div><div>The widespread use of personal care products poses significant risks to both ecosystems and human health. The construction of photocatalysts with the advantages of enhanced visible light absorption, efficient charge separation and high stability is important for the degradation of persistent environmental pollutants. Herein, we have prepared two D-A heterojunction organic semiconductor photocatalysts: PV-BDTC1:IDTCN/Biochar and PV-BDTC2:IDTCN/Biochar by a simple design method that can be widely applied. Under visible light irradiation, PV-BDTC2:IDTCN/Biochar showed better removal ability for indomethacin, with reaction rate constants 14.7 and 5.1 times higher than those of PV-BDTC2:IDTCN and Biochar, respectively. This is attributed to the construction of a heterojunction between the donor and the acceptor, which expands the light absorption range and promotes the separation of photogenerated carriers, thereby giving the material the ability to produce a large number of reactive oxygen species during the photocatalytic reaction. In addition, Biochar well ensures the stability of D-A heterojunction films under long-term operating conditions. This work highlight the potential of natural biomaterials in constructing effective D-A heterojunction organic photocatalysts/adsorbents for combatting water pollution.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 139-150"},"PeriodicalIF":5.9,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158422","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":"Construction of an SnS-based heterostructure catalyst for electrochemical CO2 reduction to formate over a wide potential window","authors":"Renzhi Qi ,&nbsp;Zhaoping Zhong ,&nbsp;Fei Huang ,&nbsp;Fuqiang Chen ,&nbsp;You Jia ,&nbsp;Yuxuan Yang ,&nbsp;Zekun Yun ,&nbsp;Qihang Ye","doi":"10.1016/j.jes.2024.12.015","DOIUrl":"10.1016/j.jes.2024.12.015","url":null,"abstract":"<div><div>SnS has emerged as an attractive catalyst for the electrochemical CO₂ reduction reaction (CO₂RR) to formate, while its long-term operational stability is hindered by the self-reduction of Sn²⁺ and sulfur dissolution. Thus, maintaining high current efficiency across a wide negative potential range to achieve high production rates of formate remains a significant challenge. In this study, we present a heterostructure constructed with SnS and CuS for efficient CO₂RR to formate. The SnS-CuS (30) exhibits a remarkable formate Faradaic efficiency (<em>FE_f</em>) of 93.94 % at −1 V vs reversible hydrogen electrode (RHE) and demonstrates long-term stability for 7.5 h, maintaining high activity (with an average <em>FE_f</em> of 85.6 %) across a wide negative potential range (− 0.8 V−1.2 V (vs. RHE)). The results reveal that the heterogeneous interface between SnS and CuS mitigates the self-reduction issue of SnS by sacrificing Cu²⁺, highlighting that the true active species is SnS, which effectively resists structural changes during the electrolysis process under the protection of CuS. The synergistic interaction within the CuS and SnS heterostructure, combined with the tendency for electron self-conduction, enables the catalyst to maintain high formate activity and selectivity across a wide potential range. Furthermore, theoretical results further indicate that the incorporation of CuS enhances CO₂ adsorption and lowers the energy barrier for the formation of formate intermediates. This study inspires the concept of applying protective layers to active species, promoting high selectivity in Sn-based electrocatalysts.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 25-36"},"PeriodicalIF":5.9,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158377","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":"Dual S-scheme heterojunction via MOF-on-MOF strategy for efficient photoelectrocatalytic removal of organic contaminants: Detoxification and mechanism","authors":"Qiang Li ,&nbsp;Qi Zhou ,&nbsp;Yanling Wu ,&nbsp;Yingxue Shi ,&nbsp;Yingqi Liu ,&nbsp;Hao Deng ,&nbsp;Siwei Chen ,&nbsp;Zhiheng Li ,&nbsp;Erpeng Wang ,&nbsp;Huayue Zhu ,&nbsp;Qi Wang","doi":"10.1016/j.jes.2024.12.014","DOIUrl":"10.1016/j.jes.2024.12.014","url":null,"abstract":"<div><div>Accelerating the separation of carriers in the heterojunction plays vital role in the photoelectrocatalytic (PEC) process, yet it remains a challenging undertaking. Herein, a MOF-on-MOF based dual S-scheme heterojunction (BiVO₄/NH₂-MIL-125(Ti)/NH₂-MIL-53(Fe), denoted as BVO/NM125/NM53) was rationally designed and prepared for PEC removing and detoxification of organic contaminants (phenol, tetracycline hydrochloride, ciprofloxacin and norfloxacin). The S-scheme heterojunction was double confirmed by DFT calculation and XPS analysis. The charge transfer resistance of BVO/NM125/NM53 photoanode decreases to 1/11 of bare BiVO₄ photoanode. Meanwhile, the photocurrent density was 3 times higher, demonstrating a marked improvement in carrier separation efficiency due to dual S-scheme heterojunction. The photoanode achieved 94.3 % removal of phenol within 60 min and maintained stable performance over 10 consecutive cycles, demonstrating good PEC efficiency and structural stability. The BVO/NM125/NM53 photoanode also showed effectiveness in removing antibiotics, with chlorophyll fluorescence imaging confirming a significant reduction in the ecotoxicity of intermediates. For example, wheat seed germination, growth, chlorophyll and Carotenoid production were not affected, which was similar to that of deionized water. Radical trapping experiments and electron paramagnetic resonance (EPR) analysis identified •O₂^- and •OH as the primary active species. This work demonstrates the effectiveness of developing MOF-on-MOF heterojunctions for visible-light response and enhancing charge separation in PEC.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 111-126"},"PeriodicalIF":5.9,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158420","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":"Arsenic speciation in freshwater fish using high performance liquid chromatography and inductively coupled plasma mass spectrometry","authors":"Chester Lau ,&nbsp;Xiufen Lu ,&nbsp;Karen S. Hoy ,&nbsp;Tetiana Davydiuk ,&nbsp;Jennifer A. Graydon ,&nbsp;Megan Reichert ,&nbsp;X. Chris Le","doi":"10.1016/j.jes.2024.12.010","DOIUrl":"10.1016/j.jes.2024.12.010","url":null,"abstract":"<div><div>Arsenic speciation in freshwater fish is crucial for providing meaningful consumption guidelines that allow the public to make informed decisions regarding its consumption. While marine fish have attracted much research interest due to their higher arsenic content, research on freshwater fish is limited due to the challenges in quantifying and identifying arsenic species present at trace levels. We describe here a sensitive method and its application to the quantification of arsenic species in freshwater fish. Arsenic species from fish tissues were extracted using a methanol/water mixture (1:1 vol. ratio) and ultrasound sonication. Anion-exchange high-performance liquid chromatography (HPLC) enabled separation of arsenobetaine (AsB), inorganic arsenite (iAs^III), dimethylarsinic acid (DMA), monomethylarsonic acid (MMA), inorganic arsenate (iAs^V), and three new arsenic species. Inductively coupled plasma mass spectrometry (ICPMS) provided highly sensitive and specific detection of arsenic. A limit of detection of 0.25 µg/kg (wet weight fish tissue) was achieved for the five target arsenic species: AsB, iAs^III, DMA, MMA, and iAs^V. A series of experiments were conducted to ensure the accuracy and validity of the analytical method. The method was successfully applied to the determination of arsenic species in lake whitefish, northern pike, and walleye, with AsB, DMA, and iAs^V being frequently detected. Three new arsenic species were detected, but their chromatographic retention times did not match with those of any available arsenic standards. Future research is necessary to elucidate the identity of these new arsenic species detected in freshwater fish.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"153 ","pages":"Pages 302-315"},"PeriodicalIF":5.9,"publicationDate":"2024-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143039481","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}