Journal of environmental sciences最新文献_第10页

Control of fine particulate nitrate during severe winter haze in “2+26” cities “2+26”城市冬季严重雾霾期间硝酸盐细颗粒物控制

IF 6.9

Journal of environmental sciences Pub Date : 2024-02-01 Epub Date: 2022-12-21 DOI: 10.1016/j.jes.2022.12.016

Chuang Qin , Xiao Fu , Tao Wang , Jian Gao , Jiaqi Wang

{"title":"Control of fine particulate nitrate during severe winter haze in “2+26” cities","authors":"Chuang Qin , Xiao Fu , Tao Wang , Jian Gao , Jiaqi Wang","doi":"10.1016/j.jes.2022.12.016","DOIUrl":"https://doi.org/10.1016/j.jes.2022.12.016","url":null,"abstract":"<div>The “2+26” cities, suffering the most severe winter haze pollution, have been the key region for air quality improvement in China. Increasing prominent nitrate pollution is one of the most challenging environmental issues in this region, necessitating development of an effective control strategy. Herein, we use observations, and state-of-the-art model simulations with scenario analysis and process analysis to quantify the effectiveness of the future SO2-NOX-VOC-NH3 emission control on nitrate pollution mitigation in “2+26” cities. Focusing on a serious winter haze episode, we find that limited NOX emission reduction alone in the short-term period is a less effective choice than VOC or NH3 emission reduction alone to decrease nitrate concentrations, due to the accelerated NOX-HNO3 conversion by atmospheric oxidants and the enhanced HNO3 to <math><msubsup><mtext>NO</mtext><mrow><mn>3</mn></mrow><mo>−</mo></msubsup></math> partition by ammonia, although deep NOX emission reduction is essential in the long-term period. The synergistic NH3 and VOC emission control is strongly recommended, which can counteract the adverse effects of nonlinear photochemistry and aerosol chemical feedback to decrease nitrate more. Such extra benefits will be reduced if the synergistic NH3 and VOC reduction is delayed, and thus reducing emission of multiple precursors is urgently required for the effective control of increasingly severe winter nitrate pollution in “2+26” cities.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"136 ","pages":"Pages 261-269"},"PeriodicalIF":6.9,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49741356","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}

引用次数: 2

Progress of gaseous arsenic removal from flue gas by adsorption: Experimental and theoretical calculations 吸附法去除烟气中气态砷的研究进展:实验和理论计算

IF 6.9

Journal of environmental sciences Pub Date : 2024-02-01 Epub Date: 2023-01-06 DOI: 10.1016/j.jes.2022.12.035

Xuelei Yan , Qingzhu Li , Xiaowei Huang , Bensheng Li , Shengtu Li , Qingwei Wang

{"title":"Progress of gaseous arsenic removal from flue gas by adsorption: Experimental and theoretical calculations","authors":"Xuelei Yan , Qingzhu Li , Xiaowei Huang , Bensheng Li , Shengtu Li , Qingwei Wang","doi":"10.1016/j.jes.2022.12.035","DOIUrl":"https://doi.org/10.1016/j.jes.2022.12.035","url":null,"abstract":"<div>Because of its high mobility and difficult capture, gaseous arsenic pollution control has become the focus of arsenic pollution control. It mainly exists in the form of highly toxic As2O3 in the flue gas. Therefore, removing gaseous As2O3 from flue gas is of great practical significance for arsenic pollution control. Stabilizing gaseous As2O3 on the surface of adsorbents by physical or chemical adsorption is an effective way to reduce the content of arsenic in the flue gas and alleviate arsenic pollution. Over the past few decades, various adsorbents have been developed to capture gaseous As2O3 in the flue gas, and their adsorption mechanisms have been studied in detail. Thus, it is necessary to review the strategies of arsenic removal from flue gas by adsorption, which can inspire further research. Based on summarizing the morphological distribution of gaseous As2O3 in the flue gas, this review further summarizes the removal of gaseous As2O3 by several adsorbents and the effect of temperature and the main components of the flue gas on arsenic adsorption. In addition, the mechanism of arsenic removal based on adsorption in the flue gas is discussed in depth through theoretical calculations, which is the particular focus of this review. Finally, prospects based on the present research state of arsenic removal by adsorption are proposed to provide ideas for developing effective and stable adsorbents for arsenic removal from flue gas.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"136 ","pages":"Pages 470-485"},"PeriodicalIF":6.9,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49741367","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}

引用次数: 4

The underappreciated role of fugitive VOCs in ozone formation and health risk assessment emitted from seven typical industries in China 挥发性挥发性有机化合物在中国7个典型行业臭氧形成和健康风险评价中的作用

IF 6.9

Journal of environmental sciences Pub Date : 2024-02-01 Epub Date: 2023-01-06 DOI: 10.1016/j.jes.2022.12.037

Zhiling Liang , Yunjiang Yu , Bingbing Sun , Qian Yao , Xihua Lin , Yongsheng Wang , Jianping Zhang , Yingzi Li , Xuefeng Wang , Zhengzheng Tang , Shexia Ma

{"title":"The underappreciated role of fugitive VOCs in ozone formation and health risk assessment emitted from seven typical industries in China","authors":"Zhiling Liang , Yunjiang Yu , Bingbing Sun , Qian Yao , Xihua Lin , Yongsheng Wang , Jianping Zhang , Yingzi Li , Xuefeng Wang , Zhengzheng Tang , Shexia Ma","doi":"10.1016/j.jes.2022.12.037","DOIUrl":"https://doi.org/10.1016/j.jes.2022.12.037","url":null,"abstract":"<div>Fugitive emission from industrial sources may result in ozone formation and health risk, while the exact contribution of this source remains incompletely understood. In this study, emission characteristics, ozone formation potential (OFP) and health risk of fugitive VOCs in 7 representative industries were investigated. Chemical material industry was the dominant contributor to VOCs of fugitive emission in comparison with other industries. The OFP of VOCs from fugitive emission was in the range of 1.45 × 103-3.98 × 105 µg/m3, with a higher value than that of organized emission in seven industries except for the coking industry and the chemical material industry, suggesting that fugitive VOCs should be taken into account while developing control strategies. Acetaldehyde, m,p-xylene, n-nonane, ethylene, vinyl chloridethe and other high OFP-contributing species were the major reactive species that should be targeted. Health risk assessment investigated non-cancer and cancer risks of fugitive VOCs in 7 industries were all above safe level (HR > 1 and LCR > 1 × 10−4), posing remarkable health threats to human health. OVOCs were the main contributor to non-cancer risk, while halohydrocarbons and aromatics contributed most to cancer risks, posing remarkable health threat on human health. Our findings highlighted the contribution of fugitive VOCs on ozone formation and health risk was underestimated, indicating which should be considered in emission control strategies of industrial sources.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"136 ","pages":"Pages 647-657"},"PeriodicalIF":6.9,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49741372","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}

引用次数: 1

An efficient CuZr-based metallic glasses electrode material for electrocatalytic degradation of azo dyes 一种电催化降解偶氮染料的高效cuzr基金属玻璃电极材料

IF 6.9

Journal of environmental sciences Pub Date : 2024-02-01 Epub Date: 2022-09-21 DOI: 10.1016/j.jes.2022.09.010

Zhiwang Deng , Bowen Zhao , Songtao Li , Zhengkun Li , Shiming Zhang , Kewei Zhang , Zhengwang Zhu

{"title":"An efficient CuZr-based metallic glasses electrode material for electrocatalytic degradation of azo dyes","authors":"Zhiwang Deng , Bowen Zhao , Songtao Li , Zhengkun Li , Shiming Zhang , Kewei Zhang , Zhengwang Zhu","doi":"10.1016/j.jes.2022.09.010","DOIUrl":"https://doi.org/10.1016/j.jes.2022.09.010","url":null,"abstract":"<div>Metallic glasses have received a lot of attention on wastewater treatment due to their unique atomic structure, and the use of metallic glasses as electrodes has produced unexpected electrocatalytic degradation effects for many pollutants through combining with electrochemical technology. However, it still is a formidable challenge to find a metallic glass electrode material with both efficient and clean for the catalytic degradation of pollutants. In this work, the Cu55Zr45 metallic glassy ribbons are used as an electrode to degrade azo dyes and show the excellent degradation effect, which can reach 95.6% within 40 min. In the degradation process, almost no additives are produced and Cu55Zr45 metallic glassy ribbons have excellent effects under different pH conditions. Meanwhile, it exhibits good stability for degradation efficiency during the 8 cycle degradation tests of the amorphous alloy electrode. When the copper nanoparticles are exposed on the surface of the ribbons, the oxidized copper obtained synergistically produce activated radicals is the primary degradation mechanism, where the auxiliary degradation mechanisms include electron transfer and the promotion of active chlorine. This research develops a new type of electrode material for wastewater treatment, and the economy and high efficiency of Cu55Zr45 metallic glass endow it the expandable functional applications.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"136 ","pages":"Pages 537-546"},"PeriodicalIF":6.9,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49741638","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}

引用次数: 1

A short climatology of black and brown carbon and their sources at a suburban site impacted by smoke in Brazil 巴西受烟雾影响的郊区黑碳和棕碳的短气候学及其来源

IF 6.9

Journal of environmental sciences Pub Date : 2024-02-01 Epub Date: 2022-12-28 DOI: 10.1016/j.jes.2022.12.025

Admir Créso Targino , Patricia Krecl , Gabriel Yoshikazu Oukawa , Eva Maria Mollinedo

{"title":"A short climatology of black and brown carbon and their sources at a suburban site impacted by smoke in Brazil","authors":"Admir Créso Targino , Patricia Krecl , Gabriel Yoshikazu Oukawa , Eva Maria Mollinedo","doi":"10.1016/j.jes.2022.12.025","DOIUrl":"https://doi.org/10.1016/j.jes.2022.12.025","url":null,"abstract":"<div>Emissions from biomass burning challenge efforts to curb air pollution in cities downwind of fire-prone regions, as they contribute large amounts of brown carbon (BrC) and black carbon (BC) particles. We investigated the patterns of BrC and BC concentrations using Aethalometer data (at λ = 370 and 880 nm, respectively) spanning four years at a site impacted by the outflow of smoke. The data required to be post processed for the shadowing effect since, without correction, concentrations would be between 29% and 35% underestimated. The BrC concentrations were consistently higher than the BC concentrations, indicating the prevalence of aerosols from biomass burning. The results were supported by the Ångström coefficient (Å370/880), with values predominantly larger than 1 (mean ± standard deviation: 1.25 ± 0.31). Å370/880 values below 1 were more prevalent during the wet season, which suggests a contribution from fossil fuel combustion. We observed sharp BrC and BC seasonal signals, with mean minimum concentrations of 0.40 µg/m3 and 0.36 µg/m3, respectively, in the wet season, and mean maximum concentrations of 2.05 µg/m3 and 1.53 µg/m3 in the dry season. The largest concentrations were observed when northerly air masses moved over regions with a high density of fire spots. Local burning of residential solid waste and industrial combustion caused extreme BrC and BC concentrations under favourable wind directions. Although neither pollutant is included in any ambient air quality standards, our results suggest that transboundary smoke may hamper efforts to meet the World Health Organization guidelines for fine particles.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"136 ","pages":"Pages 498-511"},"PeriodicalIF":6.9,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49741328","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}

引用次数: 3

An efficient approach for the treatment of radioactive waste perfluoropolyether lubricants via a synergistic effect of thermal catalysis and immobilization 一种通过热催化和固定化的协同效应处理放射性废物全氟聚醚润滑剂的有效方法

IF 6.9

Journal of environmental sciences Pub Date : 2024-02-01 Epub Date: 2023-02-25 DOI: 10.1016/j.jes.2023.02.032

Xinhang Du, Wenhua Tong, Xinyu Zhou, Jia Luo, Yuqiu Liu, Yabo Wang, Panyu Li, Yongkui Zhang

{"title":"An efficient approach for the treatment of radioactive waste perfluoropolyether lubricants via a synergistic effect of thermal catalysis and immobilization","authors":"Xinhang Du, Wenhua Tong, Xinyu Zhou, Jia Luo, Yuqiu Liu, Yabo Wang, Panyu Li, Yongkui Zhang","doi":"10.1016/j.jes.2023.02.032","DOIUrl":"https://doi.org/10.1016/j.jes.2023.02.032","url":null,"abstract":"<div>Perfluoropolyether (PFPE) lubricants are a kind of high-molecular polymer with many excellent properties. However, the use of PFPEs in the nuclear industry can lead to partial decomposition and carrying radionuclides, resulting in a large amount of radioactive waste PFPE lubricants annually. Moreover, radioactive waste PFPE lubricants are difficult to be effectively treated due to their high stability, the risk of possible leakage of radionuclides, and hypertoxic fluorine-containing by-products. In this study, without any precedent, a strategy of MnO2-catalyzed decomposition and Na2CO3-immobilized conversion was proposed for PFPE lubricant decomposition and fluorine immobilization simultaneously based on the Lewis acid-base and oxygen vacancies concept. A high fluorine conversion efficiency of 95.4% was achieved. Meanwhile, the mechanism of decomposition suggested that MnO2 mainly provided Lewis acid sites and attacked the (basic) fluorine or oxygen atoms in PFPE molecules. The decomposition of PFPE chains was proceed down and volatile fluorine-containing gas was released by partial electron transfer, intramolecular disproportionation reaction, and unzipping fashion. Subsequently, gas by-products could be further oxidized and then immobilized into fluoride salts by carbonate solid absorbents. Overall, this study provides a simple, safe, and potentially practical strategy for the harmless conversion of refractory fluorinated organic wastes, especially perfluoropolymers.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"136 ","pages":"Pages 512-522"},"PeriodicalIF":6.9,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49741330","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}

引用次数: 0

Fabrication of CuFe2O4/Bi12O17Cl2 photocatalyst with intrinsic p-n junction for highly efficient bisphenol A degradation 高效降解双酚A的本征p-n结CuFe2O4/Bi12O17Cl2光催化剂的制备

IF 6.9

Journal of environmental sciences Pub Date : 2024-02-01 Epub Date: 2022-09-13 DOI: 10.1016/j.jes.2022.09.003

Yong Wang , Cheng Liu , Haoyun Hu , Qiujun Lu , Haiyan Wang , Chenxi Zhao , Fuyou Du , Ningli Tang

{"title":"Fabrication of CuFe2O4/Bi12O17Cl2 photocatalyst with intrinsic p-n junction for highly efficient bisphenol A degradation","authors":"Yong Wang , Cheng Liu , Haoyun Hu , Qiujun Lu , Haiyan Wang , Chenxi Zhao , Fuyou Du , Ningli Tang","doi":"10.1016/j.jes.2022.09.003","DOIUrl":"https://doi.org/10.1016/j.jes.2022.09.003","url":null,"abstract":"<div>The construction and application of novel highly efficient photocatalysts have been the focus in the field of environmental pollutant removal. In this work, a novel CuFe2O4/Bi12O17Cl2 photocatalysts were synthesized by simple hydrothermal and chemical precipitation method. The fabricated CuFe2O4/Bi12O17Cl2 composite exhibited much higher photocatalytic activity than pristine CuFe2O4 and Bi12O17Cl2 in the removal of bisphenol A (BPA) under visible-light illumination, which ascribed to the intrinsic p-n junction of CuFe2O4 and Bi12O17Cl2. The photocatalytic degradation rate of BPA on CuFe2O4/Bi12O17Cl2 with an optimized CuFe2O4 content (1.0 wt.%) reached 93.0% within 30 min. The capture experiments of active species confirmed that the hydroxyl radicals (•OH) and superoxide radicals (•O2−) played crucial roles in photocatalytic BPA degradation process. Furthermore, the possible degradation mechanism and pathways of BPA was proposed according to the detected intermediates in photocatalytic reaction process.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"136 ","pages":"Pages 547-558"},"PeriodicalIF":6.9,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49740987","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}

引用次数: 3

Residual levels and health risk assessment of trace metals in Chinese resident diet 中国居民饮食中微量金属残留水平及健康风险评价

IF 6.9

Journal of environmental sciences Pub Date : 2024-02-01 Epub Date: 2022-10-09 DOI: 10.1016/j.jes.2022.09.036

Yubing Dai , Shuai Sun , Rong Cao , Haijun Zhang , Jiping Chen , Ningbo Geng

{"title":"Residual levels and health risk assessment of trace metals in Chinese resident diet","authors":"Yubing Dai , Shuai Sun , Rong Cao , Haijun Zhang , Jiping Chen , Ningbo Geng","doi":"10.1016/j.jes.2022.09.036","DOIUrl":"https://doi.org/10.1016/j.jes.2022.09.036","url":null,"abstract":"<div>Large-scale metal contamination across the food web is an intractable problem due to increasing pollutant emissions, atmospheric transport, and dry and wet deposition of elements. The present study focus on several trace metals that are rarely studied but have special toxicity, including tin (Sn), antimony (Sb), gold (Au), hafnium (Hf), palladium (Pd), platinum (Pt), ruthenium (Ru), tellurium (Te) and iridium (Ir). We investigated trace metals residues and distribution characteristics, and further evaluated the potential health risks from major daily food intakes in 33 cities in China. Sn, Sb, Ir, Hf, and Au were frequently detected in food samples with the concentrations ranged from ND (not detected) to 24.78 µg/kg ww (wet weight). Eggs exhibited the highest residual level of all detected metals (13.70 ± 14.70 µg/kg ww in sum), while the lowest concentrations were observed in vegetables (0.53 ± 0.17 µg/kg ww in sum). Sn accounting for more than 50% of the total trace metals concentration in both terrestrial and aquatic animal origin foods. In terrestrial plant origin foods, Sn and Ir were the most abundant elements. Hf and Au were the most abundant elements in egg samples. In addition, Sb and Ir showed a clear trophic dilution effect in terrestrial environments, while in aquatic ecosystems, Sn, Hf, and Au exhibited obvious trophic amplification effects. The calculated average estimated daily intake (EDI) via food consumption in five regions of China was 0.09 µg/(kg·day), implying the health risk of aforementioned elements was acceptable.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"136 ","pages":"Pages 451-459"},"PeriodicalIF":6.9,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49741364","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}

引用次数: 1

Geochemical elements in suspended particulate matter of Ensenada de La Paz Lagoon, Baja California Peninsula, Mexico: Sources, distribution, mass balance and ecotoxicological risks 墨西哥下加利福尼亚半岛Ensenada de La Paz泻湖悬浮颗粒物的地球化学元素:来源、分布、质量平衡和生态毒理学风险

IF 6.9

Journal of environmental sciences Pub Date : 2024-02-01 Epub Date: 2022-09-15 DOI: 10.1016/j.jes.2022.08.033

Sandra Soledad Morales-García , Pilar de Acacia Pérez- Escamilla , Suresh Babu Sujitha , Pichaimani Godwyn-Paulson , Andrés Felipe Zúñiga-Cabezas , Muthuswamy Ponniah Jonathan

{"title":"Geochemical elements in suspended particulate matter of Ensenada de La Paz Lagoon, Baja California Peninsula, Mexico: Sources, distribution, mass balance and ecotoxicological risks","authors":"Sandra Soledad Morales-García , Pilar de Acacia Pérez- Escamilla , Suresh Babu Sujitha , Pichaimani Godwyn-Paulson , Andrés Felipe Zúñiga-Cabezas , Muthuswamy Ponniah Jonathan","doi":"10.1016/j.jes.2022.08.033","DOIUrl":"https://doi.org/10.1016/j.jes.2022.08.033","url":null,"abstract":"<div>The present study aimed to evaluate multi-element concentrations (Al, As, Ca, Cd, Co, Cr, Cu, Fe, Mg, Mn, Mo, Ni, Pb, Sr) in suspended particulate material (SPM) collected from Ensenada de La Paz (ELP) lagoon, Baja California Sur, Mexico in two different periods (September and May) to comprehend their origin, geochemical behavior, mass transfer and associated ecotoxicological risks. The 24 hr variation coefficient of volumetric SPM levels were found to be 51.7% in September and 40.5% in May, signifying the effects of oceanic waters. The calculated enrichment factor (EF) values for all the studied elements were of higher magnitude because of the high surface area and oxide nature of SPM, and in this study, Mo had the highest EF of 46.77 probably due to its origin from continental weathering. From the ecotoxicological perspective, the integrated toxic risk index revealed low toxic risk to the benthic community. However, the mean-ERM-Quotient calculated using the particulate concentrations of As, Cd, Cr, Cu, Ni, Pb indicated 9% probability of toxicity to biota. The comprehensive geochemical and ecotoxicological assessment of particulate metal concentrations in the ELP lagoon signify low to moderate contamination.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"136 ","pages":"Pages 422-436"},"PeriodicalIF":6.9,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49741097","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}

引用次数: 0

OsPDR20 is an ABCG metal transporter regulating cadmium accumulation in rice OsPDR20是调节水稻镉积累的ABCG金属转运体

IF 6.9

Journal of environmental sciences Pub Date : 2024-02-01 Epub Date: 2022-09-24 DOI: 10.1016/j.jes.2022.09.021

He Li, Chao Li, Di Sun, Zhi Min Yang

{"title":"OsPDR20 is an ABCG metal transporter regulating cadmium accumulation in rice","authors":"He Li, Chao Li, Di Sun, Zhi Min Yang","doi":"10.1016/j.jes.2022.09.021","DOIUrl":"https://doi.org/10.1016/j.jes.2022.09.021","url":null,"abstract":"<div>Cadmium (Cd) is a non-essential toxic heavy metal, seriously posing high environmental risks to human health. Digging genetic resources relevant to functional genes is important for understanding the metal absorption and accumulation in crops and bioremediation of Cd-polluted environments. This study investigated a functionally uncharacterized ATP binding cassette transporter G family (ABCG) gene encoding a Pleiotropic Drug Resistance 20 (PDR20) type metal transporter which is localized to the plasma membrane of rice. OsPDR20 was transcriptionally expressed in almost all tissues and organs in lifespan and was strongly induced in roots and shoots of young rice under Cd stress. Ectopic expression of OsPDR20 in a yeast mutant ycf1 sensitive to Cd conferred cellular tolerance with less Cd accumulation. Knockdown of OsPDR20 by RNA interference (RNAi) moderately attenuated root/shoot elongation and biomass, with reduced chlorophylls in rice grown under hydroponic medium with 2 and 10 µmol/L Cd, but led to more Cd accumulation. A field trial of rice grown in a realistic Cd-contaminated soil (0.40 mg/kg) showed that RNAi plants growth and development were also compromised compared to wild-type (WT), with smaller panicles and lower spikelet fertility but little effect on yield of grains. However, OsPDR20 suppression resulted in unexpectedly higher levels of Cd accumulation in rice straw including lower leaves and culm and grain. These results suggest that OsPDR20 is actively involved in Cd accumulation and homeostasis in rice crops. The increased Cd accumulation in the RNAi plants has the potential application in phytoremediation of Cd-polluted wetland soils.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"136 ","pages":"Pages 21-34"},"PeriodicalIF":6.9,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49741487","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}

引用次数: 3