Journal of environmental sciences最新文献_第10页

Design of Ca-type todorokite catalysts with highly active for the selective reduction of NOx by NH3 at low temperatures 低温NH3选择性还原NOx高活性ca型云石催化剂的设计

IF 6.9

Journal of environmental sciences Pub Date : 2023-05-03 DOI: 10.1016/j.jes.2023.04.025

Chuang Chang , Zidi Yan , Chunlei Zhang , Yanshuang Zhang , Miao Jiang , Luna Ruan , Min Xiao , Yunbo Yu , Hong He

{"title":"Design of Ca-type todorokite catalysts with highly active for the selective reduction of NOx by NH3 at low temperatures","authors":"Chuang Chang , Zidi Yan , Chunlei Zhang , Yanshuang Zhang , Miao Jiang , Luna Ruan , Min Xiao , Yunbo Yu , Hong He","doi":"10.1016/j.jes.2023.04.025","DOIUrl":"https://doi.org/10.1016/j.jes.2023.04.025","url":null,"abstract":"<div>Ca-type todorokite catalysts were designed and prepared by a simple redox method and applied to the selective reduction of NOx by NH3 (NH3-SCR) for the first time. Compared with the Na-type manjiroite prepared by the same method, the todorokite catalysts with different Mn/Ca ratios showed greatly improved catalytic activity for NOx reduction. Among them, Mn8Ca4 catalyst exhibited the best NH3-SCR performance, achieving 90% NOx conversion within temperature range of 70–275°C and having a high sulphur resistance. Compared to the Na-type manjiroite sample, Ca-type todorokite catalysts possessed an increased size of tunnel, resulting in a larger specific surface area. As increased the amounts of Ca doping, the Na content in Ca-type todorokite catalysts significantly decreased, providing larger amounts of Brønsted acid sites for NH3 adsorption to produce NH4+. The NH4+ species were highly active for reaction with NO + O2, playing a determining role in NH3-SCR process at low temperatures. Meanwhile, larger amounts of surface adsorbed oxygen contained over the Ca-doping samples than that over Na-type manjiroite, promoting the oxidation of NO and fast SCR processes. Over the Ca-type todorokite catalysts, furthermore, nitrates produced during the flow of NO + O2, were more active for reaction with NH3 than that over Na-type manjiroite, benefiting the occurrence of NH3-SCR process. This study provides novel insights into the design of NH3-SCR catalysts with high performance.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"138 ","pages":"Pages 697-708"},"PeriodicalIF":6.9,"publicationDate":"2023-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49741640","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

Spatial distribution of bacterial resistance towards antibiotics of rural sanitation system in China and its potential link with diseases incidence 中国农村卫生系统细菌抗生素耐药性的空间分布及其与疾病发病率的潜在联系

IF 6.9

Journal of environmental sciences Pub Date : 2023-05-01 DOI: 10.1016/j.jes.2022.06.010

Houyu Li , Lu Tan , Chunxue Zhang, Xiaocheng Wei, Qiang Wang, Qian Li, Xiangqun Zheng, Yan Xu

{"title":"Spatial distribution of bacterial resistance towards antibiotics of rural sanitation system in China and its potential link with diseases incidence","authors":"Houyu Li , Lu Tan , Chunxue Zhang, Xiaocheng Wei, Qiang Wang, Qian Li, Xiangqun Zheng, Yan Xu","doi":"10.1016/j.jes.2022.06.010","DOIUrl":"10.1016/j.jes.2022.06.010","url":null,"abstract":"<div>Chinese government is vigorously promoting toilet renovation in rural areas to reduce the risk of human feces exposure, which would cause infectious diseases, especially antibiotic resistance genes (ARGs) and pathogens. However, the distribution of ARGs in human feces from different regions of China remained ill-defined. It is not yet known how the survival of ARGs after toilet treatment is associated with the regional infection rates. Here, we investigated the prevalence of ARGs in human feces in rural areas of China and their potential relationship with infectious diseases for the first large-scale. The results showed that there were still high ARGs residues in human feces after rural toilet treatment, especially tetM-01 and ermB with average relative abundance as high as 1.21 × 10−1 (Eastern) and 1.56 × 10−1 (Northern), respectively. At a large regional scale, the significant differences in human feces resistomes were mainly shaped by the toilet types, TN, NH3-N, and the bacterial community. A critical finding was that toilets still cannot effectively decrease the pathogenicity risk in human feces. The significant positive relationship (P<0.05) between infectious diseases and ARGs can infer that ARGs in human feces exposure might be a critical path for enhancing the incidence of diseases, as these ARGs hinder the effectiveness of antibiotics.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"127 ","pages":"Pages 361-374"},"PeriodicalIF":6.9,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10748725","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

Reproductive toxicity of enrofloxacin in Caenorhabditis elegans involves oxidative stress-induced cell apoptosis 恩诺沙星对秀丽隐杆线虫的生殖毒性涉及氧化应激诱导的细胞凋亡

IF 6.9

Journal of environmental sciences Pub Date : 2023-05-01 DOI: 10.1016/j.jes.2022.07.002

Jiahao Huang , Lizi Liao , Guowei Wang , Zhongkun Du , Zhengxing Wu

{"title":"Reproductive toxicity of enrofloxacin in Caenorhabditis elegans involves oxidative stress-induced cell apoptosis","authors":"Jiahao Huang , Lizi Liao , Guowei Wang , Zhongkun Du , Zhengxing Wu","doi":"10.1016/j.jes.2022.07.002","DOIUrl":"10.1016/j.jes.2022.07.002","url":null,"abstract":"<div>Fluoroquinolone antibiotics (FQs) that persist and bioaccumulate in the environment have aroused people's great concern. Here, we studied the adverse effects of FQs in soil animals of Caenorhabditis elegans via food-chronically exposure. The result shows C. elegans exposed to FQs exhibited reproductive toxicity with small-brood size and low-egg hatchability. To study the underlying mechanism, we conduct a deep investigation of enrofloxacin (ENR), one of the most frequently detected FQs, on nematodes which is one of commonly used animal indicator of soil sustainability. The concentration-effect curves simulated by the Hill model showed that the half effect concentrations (EC50) of ENR were (494.3 ± 272.9) µmol/kg and (107.4 ± 30.9) µmol/kg for the brood size and the hatchability, respectively. Differential gene expression between the control and the ENR-exposure group enriched with the oxidative stress and cell apoptosis pathways. The results together with the enzyme activity in oxidative stress and the cell corpses suggested that ENR-induced reproductive toxicity was related to germ cell apoptosis under oxidative stress. The risk quotients of some soil and livestock samples were calculated based on the threshold value of EC10 for the egg hatchability (2.65 µmol/kg). The results indicated that there was possible reproductive toxicity on the nematodes in certain agricultural soils for the FQs. This study suggested that chronic exposure to FQs at certain levels in environment would induce reproductive toxicity to the nematodes and might reduce the soil sustainability, alarming the environment risks of antibiotics abuse.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"127 ","pages":"Pages 726-737"},"PeriodicalIF":6.9,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10380232","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

Influence of microplastics on the photodegradation of perfluorooctane sulfonamide (FOSA) 微塑料对全氟辛烷磺酰胺(FOSA)光降解的影响

IF 6.9

Journal of environmental sciences Pub Date : 2023-05-01 DOI: 10.1016/j.jes.2022.07.004

Lingyi Meng , Haoting Tian , Jitao Lv , Yawei Wang , Guibin Jiang

{"title":"Influence of microplastics on the photodegradation of perfluorooctane sulfonamide (FOSA)","authors":"Lingyi Meng , Haoting Tian , Jitao Lv , Yawei Wang , Guibin Jiang","doi":"10.1016/j.jes.2022.07.004","DOIUrl":"10.1016/j.jes.2022.07.004","url":null,"abstract":"<div>PFAS (per- and polyfluoroalkyl substances) are omnipresent in the environment and their transportation and transformation have attracted increased attention. Microplastics are another potential risk substances that can serve as a carrier for ubiquitous pollutants, thus affecting the presence of PFAS in the environment. In this study, the adsorption of perfluorooctane sulfonamide (FOSA) and perfluorooctanoic acid (PFOA) on four microplastics (PE, PVC, PS, and PTFE) and their effect on the photodegradation of FOSA were studied. The adsorption capacity of FOSA by PS was the highest, in similar, PS displayed the highest adsorption capacity in the presence of PFOA. Different effects of pH and salinity on the adsorption of FOSA and PFOA were observed among different microplastics indicating inconsistent interaction mechanisms. Furthermore, FOSA could be photodegraded, with PFOA as the main product, while the presence of microplastics had a negligible effect on the degradation of this contaminant. The results indicated that microplastics could act as PFAS concentrators. Moreover, their photochemical inertias make the pollutants enriched on microplastics more resistant to degradation.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"127 ","pages":"Pages 791-798"},"PeriodicalIF":6.9,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10380235","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: 6

Transgenerational bone toxicity in F3 medaka (Oryzias latipes) induced by ancestral benzo[a]pyrene exposure: Cellular and transcriptomic insights 祖先苯并[a]芘暴露诱导的F3 medaka (Oryzias latipes)的跨代骨毒性:细胞和转录组学的见解

IF 6.9

Journal of environmental sciences Pub Date : 2023-05-01 DOI: 10.1016/j.jes.2022.04.051

Jiezhang Mo , Miles Teng Wan , Doris Wai-Ting Au , Jingchun Shi , Nathan Tam , Xian Qin , Napo K.M. Cheung , Keng Po Lai , Christoph Winkler , Richard Yuen-Chong Kong , Frauke Seemann

{"title":"Transgenerational bone toxicity in F3 medaka (Oryzias latipes) induced by ancestral benzo[a]pyrene exposure: Cellular and transcriptomic insights","authors":"Jiezhang Mo , Miles Teng Wan , Doris Wai-Ting Au , Jingchun Shi , Nathan Tam , Xian Qin , Napo K.M. Cheung , Keng Po Lai , Christoph Winkler , Richard Yuen-Chong Kong , Frauke Seemann","doi":"10.1016/j.jes.2022.04.051","DOIUrl":"10.1016/j.jes.2022.04.051","url":null,"abstract":"<div>Benzo[a]pyrene (BaP), a ubiquitous pollutant, raises environmental health concerns due to induction of bone toxicity in the unexposed offspring. Exposure of F0 ancestor medaka (Oryzias latipes) to 1 µg/L BaP for 21 days causes reduced vertebral bone thickness in the unexposed F3 male offspring. To reveal the inherited modifications, osteoblast (OB) abundance and molecular signaling pathways of transgenerational BaP-induced bone thinning were assessed. Histomorphometric analysis showed a reduction in OB abundance. Analyses of the miRNA and mRNA transcriptomes revealed the dysregulation of Wnt signaling (frzb/ola-miR-1–3p, sfrp5/ola-miR-96–5p/miR-455–5p) and bone morphogenetic protein (Bmp) signaling (bmp3/ola-miR-96–5p/miR-181b-5p/miR-199a-5p/miR-205–5p/miR-455–5p). Both pathways are major indicators of impaired bone formation, while the altered Rank signaling in osteoclasts (c-fos/miR-205–5p) suggests a potentially augmented bone resorption. Interestingly, a typical BaP-responsive pathway, the Nrf2-mediated oxidative stress response (gst/ola-miR-181b-5p/miR-199a-5p/miR-205), was also affected. Moreover, mRNA levels of epigenetic modification enzymes (e.g., hdac6, hdac7, kdm5b) were found dysregulated. The findings indicated that epigenetic factors (e.g., miRNAs, histone modifications) may directly regulate the expression of genes associated with transgenerational BaP bone toxicity and warrants further studies. The identified candidate genes and miRNAs may serve as potential biomarkers for BaP-induced bone disease and as indicators of historic exposures in wild fish for conservation purposes.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"127 ","pages":"Pages 336-348"},"PeriodicalIF":6.9,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10381742","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

Enhancement of methanogenic activity by micronutrient control: Micronutrient availability in relation to sulfur transport 微量元素控制对产甲烷活性的增强:微量元素有效性与硫运输的关系

IF 6.9

Journal of environmental sciences Pub Date : 2023-05-01 DOI: 10.1016/j.jes.2022.06.044

Krittiya Pornmai , Sawwalak Itsadanont , Monchupa Lertpattanapong , Kessara Seneesrisakul , Achiraya Jiraprasertwong , Malinee Leethochawalit , Hidetoshi Sekiguchi , Sumaeth Chavadej

{"title":"Enhancement of methanogenic activity by micronutrient control: Micronutrient availability in relation to sulfur transport","authors":"Krittiya Pornmai , Sawwalak Itsadanont , Monchupa Lertpattanapong , Kessara Seneesrisakul , Achiraya Jiraprasertwong , Malinee Leethochawalit , Hidetoshi Sekiguchi , Sumaeth Chavadej","doi":"10.1016/j.jes.2022.06.044","DOIUrl":"10.1016/j.jes.2022.06.044","url":null,"abstract":"<div>The main purpose of this research was to clarify the influence of the addition of iron (Fe) alone (0–100 mg/L) or 50 mg/L of Fe with 2 mg/L each of cobalt (Co), copper (Cu) and nickel (Ni) on the methanogenic activity of a mesophilic two-stage UASB system treating ethanol wastewater at a fixed chemical oxygen demand (COD) loading rate of 16 kg/m3/day under a continuous mode of operation and steady state condition. The addition of Fe provided the dual benefits of a reduction in both the dissolved sulfide and the hydrogen sulfide (H2S) content in produced gas, resulting in marginally improved hydrogen (H2) and methane (CH4) productivities. When the Fe dosage was increased beyond the optimum value of 50 mg/L, the process performance drastically declined, as a consequence of the high total volatile fatty acid (VFA) concentrations that inhibited both the acidogens and methanogens predominantly present in the 1st and 2nd reactors, respectively. The chemical precipitation of iron sulfide was responsible for the reduction of produced H2S in both the aqueous and gaseous phases as well as the minimization of added amounts of all other micronutrients to fulfil the sufficiency of all micronutrients for anaerobic digestion (AD). The addition of 2 mg/L each of Co, Cu and Ni together with 50 mg/L Fe resulted in the greatest enhancement in process performance, as indicated by the improved CH4 yield (mL/g COD applied) to about 42.3%, compared to that without micronutrient supplement.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"127 ","pages":"Pages 738-752"},"PeriodicalIF":6.9,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10386975","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

Fluorine-doped BiVO4 photocatalyst: Preferential cleavage of C−N bond for green degradation of glyphosate 氟掺杂BiVO4光催化剂：C−N键的优先断裂对草甘膦的绿色降解

IF 6.9

Journal of environmental sciences Pub Date : 2023-05-01 DOI: 10.1016/j.jes.2022.04.013

Yunlong Chen , Yingping Huang , Hailin Tian , Liqun Ye , Ruiping Li , Chuncheng Chen , Zhongxu Dai , Di Huang

{"title":"Fluorine-doped BiVO4 photocatalyst: Preferential cleavage of C−N bond for green degradation of glyphosate","authors":"Yunlong Chen , Yingping Huang , Hailin Tian , Liqun Ye , Ruiping Li , Chuncheng Chen , Zhongxu Dai , Di Huang","doi":"10.1016/j.jes.2022.04.013","DOIUrl":"https://doi.org/10.1016/j.jes.2022.04.013","url":null,"abstract":"<div>With increasing concerns on the environment and human health, the degradation of glyphosate through the formation of less toxic intermediates is of great importance. Among the developed methods for the degradation of glyphosate, photodegradation is a clean and efficient strategy. In this work, we report a new photocatalyst by doping F ion on BiVO4 that can efficiently degrade glyphosate and reduce the toxic emissions of aminomethylphosphonic acid (AMPA) through the selective (P)−C−N cleavage in comparison of BiVO4 catalyst. The results demonstrate that the best suppression of AMPA formation was achieved by the catalyst of 0.3F@BiVO4 at pH = 9 (AMPA formation below 10%). In situ attenuated total reflectance Fourier transforms infrared (ATR-FTIR) spectroscopy indicates that the adsorption sites of glyphosate on BiVO4 and 0.3F@BiVO4 are altered due to the difference in electrostatic interactions. Such an absorption alteration leads to the preferential cleavage of the C−N bond on the N−C−P skeleton, thereby inhibiting the formation of toxic AMPA. These results improve our understanding of the photodegradation process of glyphosate catalyzed by BiVO4-based catalysts and pave a safe way for abiotic degradation of glyphosate.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"127 ","pages":"Pages 60-68"},"PeriodicalIF":6.9,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49747542","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: 11

Enhancement of toluene oxidation performance over La1-xCoO3-δ perovskite by lanthanum non-stoichiometry 镧非化学计量法提高La1-xCoO3-δ钙钛矿上甲苯的氧化性能

IF 6.9

Journal of environmental sciences Pub Date : 2023-05-01 DOI: 10.1016/j.jes.2022.06.042

Anlian Zhao, Yewei Ren, Hui Wang, Zhenping Qu

{"title":"Enhancement of toluene oxidation performance over La1-xCoO3-δ perovskite by lanthanum non-stoichiometry","authors":"Anlian Zhao, Yewei Ren, Hui Wang, Zhenping Qu","doi":"10.1016/j.jes.2022.06.042","DOIUrl":"https://doi.org/10.1016/j.jes.2022.06.042","url":null,"abstract":"<div>La1-xCoO3-δ catalysts with different non-stoichiometry of lanthanum ions were synthesized by using the sol-gel method, and their catalytic performance in toluene combustion was investigated. The results showed that the catalytic activity and stability of A-site nonstoichiometric La1-xCoO3-δ were improved to a certain extent compared with pure LaCoO3 perovskite. Among them, the La0.9CoO3-δ catalyst gave the best catalytic performance for toluene oxidation. It achieved 90% toluene conversion at 205°C under the conditions of a WHSV (weight hourly space velocity) of 22,500 mL/(g·hr) and a 500 ppmV-toluene concentration. Various characterization techniques were used to investigate the relationship between the structure of these catalysts and their catalytic performance. It was found that the non-stoichiometric modification of the lanthanum ion at position A in LaCoO3 changed the surface element state of the catalyst and increased the oxygen vacancy content, thus, combined with improved reducibility, improving toluene degradation on the catalyst.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"127 ","pages":"Pages 811-823"},"PeriodicalIF":6.9,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49748174","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: 7

The accumulation and toxicity of ZIF-8 nanoparticles in Corbicula fluminea ZIF-8纳米颗粒在河蚌体内的蓄积和毒性研究

IF 6.9

Journal of environmental sciences Pub Date : 2023-05-01 DOI: 10.1016/j.jes.2022.03.020

Cuilian Yang , Jia Wen , Zhuangzhuang Xue , Xiyan Yin , Yangfang Li , Li Yuan

{"title":"The accumulation and toxicity of ZIF-8 nanoparticles in Corbicula fluminea","authors":"Cuilian Yang , Jia Wen , Zhuangzhuang Xue , Xiyan Yin , Yangfang Li , Li Yuan","doi":"10.1016/j.jes.2022.03.020","DOIUrl":"10.1016/j.jes.2022.03.020","url":null,"abstract":"<div>Metal-organic frameworks (MOFs) are promising new materials that have been intensively studied and possibly applied to various environmental remediation. However, little is known about the fate and risk of MOFs to living organisms in the water environment. Here, the toxic effects of ZIF-8 nanoparticles (NPs) on benthic organisms were confirmed by sub-chronic toxicity experiments (7 and 14 days) using Corbicula fluminea as the model organism. With exposure doses ranging from 0 to 50 mg/L, ZIF-8 NPs induced oxidative stress behaviors similar to the hormesis effect in the tissues of C. fluminea. The oxidative stress induced by ZIF-8 NPs and the released Zn2+ was the crucial cause of the toxic effects. Besides, we also found that the ZIF-8 NPs and dissolved Zn2+ may result in different mechanisms of toxicity and accumulation depending on the dosages. The Zn2+ release rate of ZIF-8 NPs was high at low dosages, leading to a higher proportion of Zn2+ taken up by C. fluminea than the particulate ZIF-8. Conversely, at high dosages, C. fluminea mainly ingested the ZIF-8 NPs and resulted in increased mortality. The results have important implications for understanding the fate and biological effects of ZIF-8 in natural aquatic environments.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"127 ","pages":"Pages 91-101"},"PeriodicalIF":6.9,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10371577","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: 7

Particulate matter capturing over manganese dioxides with different crystal structures 颗粒物质捕获的二氧化锰具有不同的晶体结构

IF 6.9

Journal of environmental sciences Pub Date : 2023-05-01 DOI: 10.1016/j.jes.2022.06.039

Rui Liu, Huan-Huan Yang, Hao Zhou, Xianliang Yi, Yang Liu

{"title":"Particulate matter capturing over manganese dioxides with different crystal structures","authors":"Rui Liu, Huan-Huan Yang, Hao Zhou, Xianliang Yi, Yang Liu","doi":"10.1016/j.jes.2022.06.039","DOIUrl":"10.1016/j.jes.2022.06.039","url":null,"abstract":"<div>Particulate matter (PM) is the main contributor to air pollution, and filtration has been reported to be promising for PM capturing. Considering the complexity of polluted air (volatile organic compounds (VOCs) and ozone are likely concomitant with PM particles) and in view of the versatility of MnO2 for the degradation of VOCs and ozone, the feasibility of MnO2 materials as PM filtering media was investigated in this study, and the effect of crystal structure on PM filtration was clarified. Compared with the layered δ-MnO2, the MnO2 with tunnel structure (including 1 × 2-, 2 × 2- and 3 × 3-MnO2) exhibited greatly enhanced PM removal efficiencies, and particularly, the 3 × 3-MnO2 possessed not only significant activity for adsorbing PM particles but also high utilization efficiency of the active surface. Physicochemical properties of the adsorbents were studied by XRD, ATR, isothermal N2 adsorption, SEM and (HR)TEM. The correlation between pore characteristics and particle elimination activity demonstrates that the most developed mesoporous structure of the 3 × 3-MnO2 sample played an important role in strengthening the PM adsorption capability. Further comparison of the surface properties of the fresh and spent samples reveals that with respective to the occasion of δ-MnO2, the structure of 3 × 3-MnO2 was robust enough to resist collapse after PM capturing and the great accommodation of the inorganic and organic PM substances in the voluminous pores induced strong affinity between PM particles and 3 × 3-MnO2. Thereby, a higher particle filtration ability was retained.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"127 ","pages":"Pages 667-677"},"PeriodicalIF":6.9,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10386973","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