Journal of Environmental Sciences-china最新文献_第5页

Adsorption and desorption of phenanthrene and 1-hydroxyphenanthrene by goethite-coated polyvinyl chloride

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2024-09-28 DOI: 10.1016/j.jes.2024.09.020

Zhiyu Zhang , Shuyue Liu , Dehua Zeng , Jingyi Gu , Tingting Cai , Ketong Chen , Hong Zhou , Zhi Dang , Chen Yang

{"title":"Adsorption and desorption of phenanthrene and 1-hydroxyphenanthrene by goethite-coated polyvinyl chloride","authors":"Zhiyu Zhang , Shuyue Liu , Dehua Zeng , Jingyi Gu , Tingting Cai , Ketong Chen , Hong Zhou , Zhi Dang , Chen Yang","doi":"10.1016/j.jes.2024.09.020","DOIUrl":"10.1016/j.jes.2024.09.020","url":null,"abstract":"<div><div>Microplastics loaded with phenanthrene and derivatives are widely detected in aquatic environments, and the coating of natural minerals or organic macromolecules may change the environmental behavior of microplastics. In this study, three kinds of composites with different coverage were prepared by coating goethite on the surface of polyvinyl chloride microplastics to investigate the adsorption and desorption behavior of phenanthrene (PHE) and 1-hydroxyphenanthrene (1-OHPHE), and the effect of mucin on desorption was investigated. The results showed that goethite promoted the adsorption of PHE and 1-OHPHE by increasing the specific surface area of the composites. With the increase of the cover degree, the adsorption of PHE decreased because of the decrease in hydrophobicity; while the adsorption of 1-OHPHE initially increased and then decreased with the contributions of hydrophobic interaction and hydrogen bond. The adsorption of 1-OHPHE could be influenced by the pH and ionic strength primarily through electrostatic interactions and Ca<sup>2+</sup> bridging. The goethite significantly increased the desorption hysteresis for two chemicals due to the complicated pore structures and increased adsorption affinity. Mucin promoted the desorption of PHE through competitive adsorption, and inhibit the desorption of 1-OHPHE through hydrophobic interaction, hydrogen bonding and Ca<sup>2+</sup> bridging. This study elucidated the effects of natural minerals on the adsorption and desorption behavior of organic pollutants on microplastics, briefly discussed the effects of organic macromolecules on the desorption behavior of pollutants with different properties, and emphasized the different environmental behaviors of pollutants.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"154 ","pages":"Pages 833-846"},"PeriodicalIF":5.9,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143152841","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}

引用次数: 0

Distribution and biotransfer of potentially toxic elements in a terrestrial ecosystem from an abandoned realgar mine

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2024-09-28 DOI: 10.1016/j.jes.2024.09.019

Fen Yang, Chaoyang Wei

{"title":"Distribution and biotransfer of potentially toxic elements in a terrestrial ecosystem from an abandoned realgar mine","authors":"Fen Yang, Chaoyang Wei","doi":"10.1016/j.jes.2024.09.019","DOIUrl":"10.1016/j.jes.2024.09.019","url":null,"abstract":"<div><div>The present study was conducted to examine the trophic transfer of potentially toxic elements (PTEs) in a closed arsenic mine. Eight PTEs in a soil-plant-leaf litter-earthworm-top predators (free-range local chicken and wild passerine bird) system were analyzed for nitrogen and carbon stable isotopes, PTE concentrations, bioaccumulation factors (BAFs), and transfer factors (TFs). The PTE concentrations in soils from mining areas were generally higher than a adjacent controlled area, with As and Cd in soils showing the prominent compared to other six PTEs, as seen for the indices of geo-accumulation index (<em>I</em><sub>geo</sub>), pollution index (PI) and potential ecological risk index (RI). The relatively high BAF and TF values suggested a distinct biotransfer of PTEs along the soil-plant-leaf litter-earthworm system. BAFs were mostly <1 except in earthworms, indicating that earthworms had a strong capacity to take up these metals. The TFs varied both among PTEs and organism's species, e.g., the transfer capacities of As in <em>Pteris vittata</em> and <em>Pteris cretica</em>, Cd in <em>Miscanthus sinensis</em>, and Pb, Cr and Mn in moss were the highest. For local free-range chicken and wild passerine bird, the concentrations of PTEs were higher in gastric contents and feather than in internal tissue (stomach, liver and heart), with lower contents in muscle and egg. Bioaccumulation of PTEs generally decreased from decomposer earthworms, to primary producer plants, to top predator, indicating a potential bio-dilution tendency in higher trophic levels in the terrestrial food chain.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 818-831"},"PeriodicalIF":5.9,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143529865","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}

引用次数: 0

Degradation of thiamphenicol by La-Fe2O3/DBD/HCP synergistic catalytic system

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2024-09-27 DOI: 10.1016/j.jes.2024.09.015

Yimo Zhao , Lijiao Zheng , Yongyang Chen , Yuan Liu , Shimeng Huang , Shanping Li

{"title":"Degradation of thiamphenicol by La-Fe2O3/DBD/HCP synergistic catalytic system","authors":"Yimo Zhao , Lijiao Zheng , Yongyang Chen , Yuan Liu , Shimeng Huang , Shanping Li","doi":"10.1016/j.jes.2024.09.015","DOIUrl":"10.1016/j.jes.2024.09.015","url":null,"abstract":"<div><div>In this study, a highly efficient La-Fe<sub>2</sub>O<sub>3</sub>/dielectric barrier discharge (DBD)/honeycomb ceramic plate synergistic catalytic system was successfully constructed by using modified iron oxide (Fe<sub>2</sub>O<sub>3</sub>) catalyst coating assisted DBD plasma, and the prepared catalytic coating was fully characterized by various techniques. The results indicate that the lanthanum (La) is efficiently and uniformly doped in Fe<sub>2</sub>O<sub>3</sub>, and the modified La-Fe<sub>2</sub>O<sub>3</sub> catalyst exhibited a better photocatalytic performance. The overuse of Thiamphenicol (TAP), as a typical chloramphenicol antibiotic, has led to its accumulation in the aquatic environment. Accordingly, TAP was selected as the target contaminant to evaluate the catalytic activity of the synergistic system. The results confirmed that the catalytic ability of the synergistic catalytic system was significantly improved, and the data showed that the degradation rate of the synergistic system reached 99.1% under the same conditions compared with 68.2% for the single DBD plasma, which effectively improved low energy efficiency limitations of the single DBD technology. Through quantitative measurements of the concentrations of dissolved ozone (O<sub>3</sub>) and hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) in the system and radical trapping experiments, combined with emission spectroscopy, the mechanism of synergistic system degradation of TAP was analyzed. The intermediates in the degradation process were characterized by high-resolution mass spectrometry, and the degradation pathway of TAP was proposed based on the analysis of the intermediates and their combination with theoretical calculations. This study presents a theoretical basis for the improvement of DBD technology and a technical guide for the removal process of antibiotics from industrial wastewater.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"154 ","pages":"Pages 805-819"},"PeriodicalIF":5.9,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143152744","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}

引用次数: 0

Explosive growth characteristics of 5.6–560 nm particles and deposition in human respiratory during spring in Yangtze River Delta region, China

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2024-09-19 DOI: 10.1016/j.jes.2024.09.002

Yingru Gong , Jinping Ou , Qihou Hu , Chengzhi Xing , Yizhi Zhu , Yuhui Wan , Danni Wang , Chao Zhang , Lixin Guan , Jiaxuan Feng , Xiangguang Ji , Xinqi Wang , Cheng Liu

{"title":"Explosive growth characteristics of 5.6–560 nm particles and deposition in human respiratory during spring in Yangtze River Delta region, China","authors":"Yingru Gong , Jinping Ou , Qihou Hu , Chengzhi Xing , Yizhi Zhu , Yuhui Wan , Danni Wang , Chao Zhang , Lixin Guan , Jiaxuan Feng , Xiangguang Ji , Xinqi Wang , Cheng Liu","doi":"10.1016/j.jes.2024.09.002","DOIUrl":"10.1016/j.jes.2024.09.002","url":null,"abstract":"<div><div>Studying the contribution of regional transport to ultrafine particles (UFPs) and the deposition effect of nanoscale particles in human respiratory system is conducive to exploring the impact of atmospheric particles on the environment and human health. Based on the data set of number concentration spectrum in the particle size range of 5.6–560 nm in the spring of Hefei, the Yangtze River Delta region obtained by a fast mobility particle sizer, the explosive growth characteristics, potential source identification and deposition flux analysis of UFPs were systematically studied. The results showed that the frequency of new particle formation (NPF) events during spring was 31.5 %. SO<sub>2</sub> and O<sub>3</sub> contribute to NPF events. Daytime, higher temperature, stronger solar radiation and lower humidity were more conducive to the explosive growth of UFPs. In addition, regional transport of pollutants from the cities around Hefei played an important role in the accumulation mode particles, which were mainly affected by the land-source air mass from northwest Jiangsu (23.64 %) and the sea-source air mass from the Yellow Sea (23.99 %). It was worth noting that approximately 10,406 ng of UFPs enters the human respiratory system every day. The main deposition area of 5.6–560 nm nanoscale particles was alveolar, 5.6–400 nm is more likely to be deposited on alveolar, while nanoscale particles with particle size between 400 and 560 nm is more likely to be deposited on head airways. This study identified the deposition risk of nanoscale particles in the respiratory system under different particle sizes.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 372-381"},"PeriodicalIF":5.9,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143377669","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}

引用次数: 0

A gene island from plasmid pkk5 of Burkholderia sp. KK1 confers arsenic resistance to Caballeronia jiangsuensis

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2024-09-19 DOI: 10.1016/j.jes.2024.09.011

Lijie Huang , Yuhan Yang , Yingxin Xue , Shilin Hu , Tian Liang , Jun Ye , Ximei Xue

{"title":"A gene island from plasmid pkk5 of Burkholderia sp. KK1 confers arsenic resistance to Caballeronia jiangsuensis","authors":"Lijie Huang , Yuhan Yang , Yingxin Xue , Shilin Hu , Tian Liang , Jun Ye , Ximei Xue","doi":"10.1016/j.jes.2024.09.011","DOIUrl":"10.1016/j.jes.2024.09.011","url":null,"abstract":"<div><div>Microorganisms play a critical role in the biotransformation of arsenic and the form which it exists in the environment. In this study, a methyl parathion-degrading bacterium <em>Caballeronia jiangsuensis</em>, isolated from an abandoned pesticide manufacturing plant, was used to analyze arsenic accumulation and transformation. The accumulation of trivalent organoarsenic compounds in <em>C. jiangsuensis</em> occurred to a greater extent than that of their pentavalent counterparts. The chromosome of <em>C. jiangsuensis</em> contains an arsenic gene island whose GC content is significantly lower than that of the genome, suggesting that the island was acquired via horizontal gene transfer. There was approximately 90 %-99 % similarity between the proteins encoded by the gene island and the corresponding sequence of the plasmid pkk5 from <em>Burkholderia</em> sp. KK1. The biotransformation of different arsenic species by <em>C. jiangsuensis</em> was subsequently analyzed. The results revealed that monomethylarsenic acid (MAs(V)) was rapidly demethylated to arsenate with very small amounts of intermediate monomethylarsonous acid (MAs(III)), whereas MAs(III) was largely oxidized to MAs(V) despite the occurrence of the gene <em>arsI</em> probably responsible for aerobic demethylation of MAs(III) in <em>C. jiangsuensis</em>. In addition, dimethylarsenic acid was partly demethylated to arsenate. Horizontal gene transfer of <em>ars</em> operon from a plasmid to other bacteria represents an adaptation to a specific environment. This study provides a new perspective for understanding arsenic biogeochemical cycling.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 562-572"},"PeriodicalIF":5.9,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143474890","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}

引用次数: 0

A new perspective on the simultaneous removal of nitrogen, tetracycline, and phosphorus by moving bed biofilm reactor under co-metabolic substances

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2024-09-19 DOI: 10.1016/j.jes.2024.09.012

Qijuan Gao , Fang Zhu , Minghui Wang , Sicheng Shao

{"title":"A new perspective on the simultaneous removal of nitrogen, tetracycline, and phosphorus by moving bed biofilm reactor under co-metabolic substances","authors":"Qijuan Gao , Fang Zhu , Minghui Wang , Sicheng Shao","doi":"10.1016/j.jes.2024.09.012","DOIUrl":"10.1016/j.jes.2024.09.012","url":null,"abstract":"<div><div>With the burgeoning growth of aquaculture industry, high concentration of NH<sub>4</sub><sup>+</sup>-N, phosphorus and tetracycline are the prevalent pollutants in aquaculture wastewater posing a significant health risk to aquatic organisms. Therefore, an effective method for treating aquaculture wastewater should be urgently explored. Simultaneous removal of NH<sub>4</sub><sup>+</sup>-N, phosphorus, tetracycline, and chemical oxygen demand (COD) in aquaculture wastewater was developed by moving bed biofilm reactor (MBBR) under co-metabolic substances. The result showed that co-metabolism substances had different effects on MBBR performance, and 79.4 % of tetracycline, 68.2 % of NH<sub>4</sub><sup>+</sup>-N, 61.3 % of total nitrogen, 88.3 % of COD, and 38.1 % of total phosphorus (TP) were synchronously removed with sodium acetate as a co-metabolic carbon source. Protein (PN), polysaccharide (PS), and electron transfer system activity were used to evaluate the MBBR performances, suggesting that PN/PS ratio was 1.48, 0.91, 1.07, 3.58, and 0.79 at phases I-V. Additionally, a mode of tetracycline degradation and TP removal was explored, and the cell apoptosis was evaluated by flow cytometry. The result suggested that 74 %, 83 %, and 83 % of tetracycline were degraded by extracellular extracts, intracellular extracts, and cell debris, and there was no difference between extracts and non-enzyme in TP removal. The ratio of viable and dead cells from biofilm reached 33.3 % and 7.68 % with sodium acetate as a co-metabolic carbon source. Furthermore, Proteobacteria and Bacteroidetes in biofilm were identified as the dominant phyla for tetracycline and nutrients removal. This study provides a new strategy for tetracycline and nutrients removal from aquaculture wastewater through co-metabolism.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 431-441"},"PeriodicalIF":5.9,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422331","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}

引用次数: 0

Depressive symptoms mediate the relationship between blood volatile organic compounds exposure and short sleep duration among US adults

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2024-09-19 DOI: 10.1016/j.jes.2024.09.009

Yue Zhu, Yinghui Ju, Menglin Wang, Rui Wu

{"title":"Depressive symptoms mediate the relationship between blood volatile organic compounds exposure and short sleep duration among US adults","authors":"Yue Zhu, Yinghui Ju, Menglin Wang, Rui Wu","doi":"10.1016/j.jes.2024.09.009","DOIUrl":"10.1016/j.jes.2024.09.009","url":null,"abstract":"<div><div>The associations of volatile organic compounds (VOCs) exposure with short sleep duration (SSD) have rarely been studied. We aimed to evaluate the correlation between VOC exposure and SSD risk, while also exploring the potential mediating influence of depressive symptoms. Blood concentrations of seven VOCs, namely benzene, toluene, ethylbenzene, <em>m-/p</em>-xylene, <em>o</em>-xylene, styrene (collectively known as BTEXS), and 1,4-dichlorobenzene, were analyzed in 2905 U.S. adults. Weighted logistic regression, quantile-based g-computation (QGC), and weighted quantile sum (WQS) regression were employed to investigate associations between selected VOCs and SSD risk. Mediation analyses were conducted to explore the potential mediating effects of depressive symptoms on these relationships. Increased blood levels of BTEXS were positively correlated with SSD risk, with odds ratios (OR) ranging from 1.130 to 1.212 (all <em>P</em> < 0.05). A nonlinear association between toluene concentration and SSD risk was observed (<em>P</em> for nonlinearity = 0.028). Both QGC and WQS analyses indicated a positive association between co-exposure to VOCs and SSD, with styrene showing the highest positive weights (QGC: OR = 1.313, 95 % confidence interval (CI): 1.038–1.660; WQS: OR = 1.386, 95 % CI: 1.111–1.731). Furthermore, BTEXS exposure was positively linked to depressive symptoms, which in turn were significantly associated with SSD risk. Mediation analyses revealed that depressive symptoms partially mediated the relationships between individual and mixed VOCs and SSD risk, with mediation proportions ranging from 15.87 % to 20.54 % (all <em>P</em> < 0.05). These findings indicated that exposure to VOCs increased SSD risk, with depressive symptoms playing a partial mediating role.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 786-794"},"PeriodicalIF":5.9,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143519216","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}

引用次数: 0

Contamination and ecological risk of heavy metals in sediments of urban rivers in a typical economic development zone, southern China

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2024-09-19 DOI: 10.1016/j.jes.2024.09.006

Xiaohui Wu , Kaixiong Yang , Jinna Lu , Bolin Li , Ye Li , Yaqiu Zhang , Li Ye

{"title":"Contamination and ecological risk of heavy metals in sediments of urban rivers in a typical economic development zone, southern China","authors":"Xiaohui Wu , Kaixiong Yang , Jinna Lu , Bolin Li , Ye Li , Yaqiu Zhang , Li Ye","doi":"10.1016/j.jes.2024.09.006","DOIUrl":"10.1016/j.jes.2024.09.006","url":null,"abstract":"<div><div>Urban rivers are one of the main water sources for local residents. However, the rapid industrialization and urbanization caused serious heavy metals pollution in urban rivers, which posed harmful impact on human health and ecosystem. In this study, 134 sediment samples were collected from urban rivers in a typical Economic and Technological Development Zone (ETDZ) to evaluate the contamination status, ecological risk, biotoxicity, and potential source of 8 heavy metals including arsenic (As), cadmium (Cd), chromium (Cr), copper (Cu), mercury (Hg), nickel (Ni), plumbum (Pb), and zinc (Zn). Results showed that the average concentrations of all 8 metals exceeded their corresponding background values and followed the trend: Cr (248.67 mg/kg) > Pb (123.58 mg/kg) > Zn (67.06 mg/kg) > Ni (47.19 mg/kg) > Cu (27.40 mg/kg) > As (16.15 mg/kg) > Cd (0.62 mg/kg) > Hg (0.21 mg/kg). A high contamination and accumulation tendency of Cd and Cr were found in the sediments. Moreover, Cd and Hg were the main contributors of ecological risk, and posed moderate to high risk. In terms of biotoxicity, all the sediment samples were harmful to benthic organisms. Two possible pollution sources of heavy metals were identified: one is a combined source of industrial and traffic pollution dominated by Cr and Pd, the other is an industrial pollution source consisting of six heavy metals (Ni, Zn, Cd, Hg, As, and Cu). This study provides insights into heavy metals pollution management and risk control in the ETDZ and similar urban rivers worldwide due to intense industrialization.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"153 ","pages":"Pages 264-274"},"PeriodicalIF":5.9,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143039483","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}

引用次数: 0

Effects of PAHs on nitrogen uptake by phytoplankton species: Implications for environmental risk assessment of micropollutants and algal bloom formation

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2024-09-19 DOI: 10.1016/j.jes.2024.09.014

Zhonghua Zhao , Xionghu Gong , Xiaolong Yao , Jianming Deng , Lu Zhang

{"title":"Effects of PAHs on nitrogen uptake by phytoplankton species: Implications for environmental risk assessment of micropollutants and algal bloom formation","authors":"Zhonghua Zhao , Xionghu Gong , Xiaolong Yao , Jianming Deng , Lu Zhang","doi":"10.1016/j.jes.2024.09.014","DOIUrl":"10.1016/j.jes.2024.09.014","url":null,"abstract":"<div><div>Polycyclic aromatic hydrocarbons (PAHs) are of great concern because they threaten primary productivity, but their specific effects on ecosystem functioning are scarce, hindering a comprehensive understanding of their ecological risks, especially in eutrophic waters. The present study was conducted by adding PAHs to four marine phytoplankton species and showed that naphthalene (Nap) and phenanthrene (Phe) induced both stimulatory and inhibitory effects (>50 %) on urea and NO<sub>3</sub><sup>−</sup> uptake by phytoplankton species. In addition, the apparent stimulative effects (>50 %) for NH<sub>4</sub><sup>+</sup> were also observed. Overall, 38.9 % of the samples exhibited stimulation effects after 24 h exposure, which increased to 61.1 % after 96 h exposure. This suggested the existence of a lag period, during which a tolerant cell population could adapt to PAHs. Significant positive correlations (<em>P</em> < 0.01) between low and high concentrations of PAH individuals demonstrated that the mode of action for both pollutants on nitrogen uptake by phytoplankton was the same. Species-specific responses were also observed, with 19.0 % of <em>Thalassiosira</em> sp. and 24.0 % of <em>Tetraselmis</em> sp. exhibited inhibition effects greater than 50 %, while 40.9 % of <em>Karlodinium veneficum (K. veneficum)</em> and 27.3 % of <em>Rhodomonas salina (R. salina)</em> demonstrated stimulation effects exceeding 50 %, providing a unique perspective for exploring the harmful algal bloom of the mixotrophic <em>K. veneficum,</em> in addition to the original consideration of nutrients. The internal mechanisms may lie in differences in energy consumption between N-forms, exposure time and chemical concentrations, as well as morphological characteristics and biochemical structures of the species, which require further investigation.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"154 ","pages":"Pages 820-832"},"PeriodicalIF":5.9,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143152371","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}

引用次数: 0

Accurate cadmium (II) detection with single crystalline α-Fe2O3 nano-hexagonal modified screen-printed carbon electrode

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2024-09-19 DOI: 10.1016/j.jes.2024.09.004

Selvakumar Palanisamy , Murugan Velmurugan , G. Bharath , Matteo Chiesa , Rajesh Madhu , Fedor V Kusmartsev , Sridharan Balu

{"title":"Accurate cadmium (II) detection with single crystalline α-Fe2O3 nano-hexagonal modified screen-printed carbon electrode","authors":"Selvakumar Palanisamy , Murugan Velmurugan , G. Bharath , Matteo Chiesa , Rajesh Madhu , Fedor V Kusmartsev , Sridharan Balu","doi":"10.1016/j.jes.2024.09.004","DOIUrl":"10.1016/j.jes.2024.09.004","url":null,"abstract":"<div><div>Even in small concentrations, toxic metals like lead, cadmium, and mercury are dangerous to the environment and human health. Environmental monitoring depends on precisely identifying these heavy metals, particularly cadmium ions (Cd(II)). In this study, we present a novel screen-printed carbon electrode (SPCE) modified with single crystalline α-Fe<sub>2</sub>O<sub>3</sub> nano-hexagons that functions as a sensor for detecting Cd(II). The performance of the fabricated sensor was thoroughly assessed and compared with unmodified SPCE using the voltammetric method. The crystalline structure of the synthesized α-Fe<sub>2</sub>O<sub>3</sub> nano-hexagons was confirmed through XRD, and surface analysis revealed an average diameter and thickness of 86 nm and 9 nm, respectively. The α-Fe<sub>2</sub>O<sub>3</sub> modified SPCE yields a 7-fold enhanced response (at pH 5.0 vs. Ag/AgCl) to Cd(II) than bare SPCE. The modified electrode effectively detects Cd(II) with a linear response range of up to 333.0 µM and a detection limit of 0.65 nM under ideal circumstances. This newly fabricated sensor offers significant potential for environmental monitoring applications by providing outstanding practicality, anti-interference ability, and repeatability for detecting Cd(II) in water samples.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"154 ","pages":"Pages 635-644"},"PeriodicalIF":5.9,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143152111","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}

引用次数: 0