Journal of environmental sciences最新文献_第2页

Co-transformation of HMs-PAHs in rhizosphere soils and adaptive responses of rhizobacteria during whole growth period of rice (Oryza sativa L.) 水稻全生育期根际土壤HMs-PAHs共转化及根际细菌的适应反应

IF 6.9

Journal of environmental sciences Pub Date : 2023-10-01 DOI: 10.1016/j.jes.2022.07.017

Shengwei Yi , Feng Li , Chen Wu , Fei Ge , Chuang Feng , Ming Zhang , Yun Liu , Hainan Lu

{"title":"Co-transformation of HMs-PAHs in rhizosphere soils and adaptive responses of rhizobacteria during whole growth period of rice (Oryza sativa L.)","authors":"Shengwei Yi , Feng Li , Chen Wu , Fei Ge , Chuang Feng , Ming Zhang , Yun Liu , Hainan Lu","doi":"10.1016/j.jes.2022.07.017","DOIUrl":"10.1016/j.jes.2022.07.017","url":null,"abstract":"<div>This study investigated the transformations of heavy metals (HMs) and polycyclic aromatic hydrocarbons (PAHs) in rhizosphere soils and adaptive responses of rhizobacterial community under the real field conditions during four growth stages (e.g., greening, tillering, heading, and maturity) of early rice (Zhongjiazao 17) and late rice (Zhongyou 9918) in Jiangshe village (JSV) and Yangji village (YJV). Results showed that rhizosphere soils of YJV were mildly polluted by Cd and PAHs compared to that of JSV. The relative abundance of bioavailable Cd (bio-Cd) and bioavailable As (bio-As) in rhizosphere soil increased before the heading stage but decreased at the subsequent growth stage, but the content of ΣPAHs in rhizosphere soil decreased gradually during whole growth period. The dominant rhizobacteria genera at YJV (e.g., Bacillus, Massilia, Sphingomonas, and Geobacter) increased at an abundance level from the tillering to heading stage. Rhizobacteria interacted with the above co-pollutant more intensely at the tillering and heading stage, where genes involved in HM-resistance and PAH-degradation appeared to have a significant enhancement. The contents of bio-Cd and bio-As in rhizosphere soil of early rice were higher than that of late rice at each growth stage, especially at the heading stage. Bio-Cd, ΣPAHs, and organic matter were key factors influencing the community structure of rhizobacteria. Results of this study provide valuable insights about the interactions between HM-PAH co-pollutant and rhizobacterial community under real field conditions and thus develop in-situ rhizosphere remediation techniques for contaminated paddy fields.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"132 ","pages":"Pages 71-82"},"PeriodicalIF":6.9,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10042859","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

Exposure to methylparaben at environmentally realistic concentrations significantly impairs neuronal health in adult zebrafish 暴露于环境现实浓度的对羟基苯甲酸甲酯显著损害成年斑马鱼的神经元健康

IF 6.9

Journal of environmental sciences Pub Date : 2023-10-01 DOI: 10.1016/j.jes.2022.07.012

Chenyan Hu , Yachen Bai , Baili Sun , Xiangzhen Zhou , Lianguo Chen

{"title":"Exposure to methylparaben at environmentally realistic concentrations significantly impairs neuronal health in adult zebrafish","authors":"Chenyan Hu , Yachen Bai , Baili Sun , Xiangzhen Zhou , Lianguo Chen","doi":"10.1016/j.jes.2022.07.012","DOIUrl":"10.1016/j.jes.2022.07.012","url":null,"abstract":"<div>Methylparaben (MeP) is an emerging aquatic pollutant that is found to impact neural functions. However, it still lacks a comprehensive understanding about its neurotoxicology. The present study exposed adult zebrafish to environmentally realistic concentrations (0, 1, 3, and 10 µg/L) of MeP for 28 days, with objectives to elucidate the neurotoxic effects and mechanisms. Proteomic profiling found that MeP pollutant induced distinct mechanism of neurotoxicity as a function of sex. MeP pollutant appeared to preferentially target the neurotransmission cascade via synapse junctions. In male brain, glutamatergic neural signaling was enhanced by 10 µg/L of MeP in characteristics of higher glutamate neurotransmitter content (by 61.9%) and up-regulated glutamate receptor expression by 2.6-fold relative to the control. In MeP-exposed female brain, biomarker proteins of synapse formation and regeneration had significantly lower abundance, accounting for the blockage of synaptic neurotransmission. Furthermore, under the stress of MeP pollutant, both male and female zebrafish initiated a negative feedback mechanism along stress neuroendocrine axis by down-regulating the transcriptions of corticotropin-releasing hormone and its binding protein, which subsequently decreased blood cortisol concentrations. MeP subchronic exposure also disturbed innate immune function. In particular, significant increases in lipopolysaccharide (LPS) content by 15.6% were caused by MeP exposure in male brain, thereby inducing the synthesis of pro-inflammatory cytokines. In contrast, female brain was able to adaptively up-regulate the protein expression of blood brain barrier to inhibit the infiltration of LPS endotoxin into brain. Overall, the present findings pinpoint the potent neurotoxicity of MeP pollutant even at environmentally realistic concentrations.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"132 ","pages":"Pages 134-144"},"PeriodicalIF":6.9,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9660413","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: 5

Occurrence of human pathogenic viruses in drinking water and in its sources: A review 饮用水中人类致病病毒的发生及其来源

IF 6.9

Journal of environmental sciences Pub Date : 2023-10-01 DOI: 10.1016/j.jes.2022.07.035

Marco Panizzolo , Marta Gea , Elisabetta Carraro , Giorgio Gilli , Silvia Bonetta , Cristina Pignata

{"title":"Occurrence of human pathogenic viruses in drinking water and in its sources: A review","authors":"Marco Panizzolo , Marta Gea , Elisabetta Carraro , Giorgio Gilli , Silvia Bonetta , Cristina Pignata","doi":"10.1016/j.jes.2022.07.035","DOIUrl":"10.1016/j.jes.2022.07.035","url":null,"abstract":"<div>Since many waterborne diseases are caused by human pathogenic viruses, virus monitoring of drinking water (DW) and DW sources is crucial for public health. Therefore, the aim of this review was to describe the occurrence of human pathogenic viruses in DW and DW sources; the occurrence of two viruses proposed as novel indicators of human faecal contamination (Pepper mild mottle virus and Tobacco mosaic virus) was also reported. This research was focused on articles that assessed viral occurrence using molecular methods in the surface water used for DW production (SW-D), groundwater used for DW production (GW-D), DW and bottled-DW (BW). A total of 1544 studies published in the last 10 years were analysed, and 79 were ultimately included. In considering the detection methods, filtration is the most common concentration technique, while quantitative polymerase chain reaction is the most common quantification technique. Regarding virus occurrence in SW-D, GW-D, and DW, high percentages of positive samples were reported for adenovirus, polyomavirus and Pepper mild mottle virus. Viral genomes were frequently detected in SW-D and rarely in GW-D, suggesting that GW-D may be a safe DW source. Viral genomes were also detected in DW, posing a possible threat to human health. The lowest percentages of positive samples were found in Europe, while the highest were found in Asia and South America. Only three articles assessed viral occurrence in BW. This review highlights the lack of method standardization and the need for legislation updates.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"132 ","pages":"Pages 145-161"},"PeriodicalIF":6.9,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9668668","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

Year-round changes in tropospheric nitrogen dioxide caused by COVID-19 in China using satellite observation 基于卫星观测的中国2019冠状病毒病疫情对流层二氧化氮全年变化

IF 6.9

Journal of environmental sciences Pub Date : 2023-10-01 DOI: 10.1016/j.jes.2022.01.013

Zhenyu Luo , Hailian Xu , Zhining Zhang, Songxin Zheng, Huan Liu

{"title":"Year-round changes in tropospheric nitrogen dioxide caused by COVID-19 in China using satellite observation","authors":"Zhenyu Luo , Hailian Xu , Zhining Zhang, Songxin Zheng, Huan Liu","doi":"10.1016/j.jes.2022.01.013","DOIUrl":"10.1016/j.jes.2022.01.013","url":null,"abstract":"<div>The lockdown policy deals a severe blow to the economy and greatly reduces the nitrogen oxides (NOx) emission in China when the coronavirus 2019 spreads widely in early 2020. Here we use satellite observations from Tropospheric Monitoring Instrument to study the year-round variation of the nitrogen dioxide (NO2) tropospheric vertical column density (TVCD) in 2020. The NO2 TVCD reveals a sharp drop, followed by small fluctuations and then a strong rebound when compared to 2019. By the end of 2020, the annual average NO2 TVCD declines by only 3.4% in China mainland, much less than the reduction of 24.1% in the lockdown period. On the basis of quantitative analysis, we find the rebound of NO2 TVCD is mainly caused by the rapid recovery of economy especially in the fourth quarter, when contribution of industry and power plant on NO2 TVCD continues to rise. This revenge bounce of NO2 indicates the emission reduction of NOx in lockdown period is basically offset by the recovery of economy, revealing the fact that China's economic development and NOx emissions are still not decoupled. More efforts are still required to stimulate low-pollution development.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"132 ","pages":"Pages 162-168"},"PeriodicalIF":6.9,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8761557/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9699970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Cerium-modified amorphous manganese oxides for efficient catalytic removal of ozone 铈修饰的无定形锰氧化物高效催化去除臭氧

IF 6.9

Journal of environmental sciences Pub Date : 2023-09-01 DOI: 10.1016/j.jes.2022.08.021

Aijie Wang, Hong Zhao, Yu Wu, Qiuyan Zhang, Chong Han

{"title":"Cerium-modified amorphous manganese oxides for efficient catalytic removal of ozone","authors":"Aijie Wang, Hong Zhao, Yu Wu, Qiuyan Zhang, Chong Han","doi":"10.1016/j.jes.2022.08.021","DOIUrl":"10.1016/j.jes.2022.08.021","url":null,"abstract":"<div>Manganese-based catalysts were widely developed for catalytic removal of ozone, and the low stability and water inactivation are major challenges. To improve removal performance of ozone, three methods were applied to modify amorphous manganese oxides, including acidification, calcination and Ce modification. The physiochemical properties of prepared samples were characterized, and the catalytic activity for ozone removal was evaluated. All modification methods can promote the removal of ozone by amorphous manganese oxides, and Ce modification showed the most significant enhancement. It was confirmed that the introduction of Ce markedly changed the amount and property of oxygen vacancies in amorphous manganese oxides. Superior catalytic activity of Ce-MnOx can be ascribed to its more content and enhanced formation ability of oxygen vacancies, larger specific surface area and higher oxygen mobility. Furthermore, the durability tests under high relative humidity (80%) determined that Ce-MnOx showed excellent stability and water resistance. These demonstrate the promising potential of amorphously Ce-modified manganese oxides for catalytic removal of ozone.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"131 ","pages":"Pages 151-161"},"PeriodicalIF":6.9,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9523642","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

Particle number size distributions and formation and growth rates of different new particle formation types of a megacity in China 中国特大城市颗粒数、粒径分布及不同新颗粒形成类型的形成和增长率

IF 6.9

Journal of environmental sciences Pub Date : 2023-09-01 DOI: 10.1016/j.jes.2022.07.029

Liang Dai , Yu Zhao , Lei Zhang , Dong Chen , Rongrong Wu

{"title":"Particle number size distributions and formation and growth rates of different new particle formation types of a megacity in China","authors":"Liang Dai , Yu Zhao , Lei Zhang , Dong Chen , Rongrong Wu","doi":"10.1016/j.jes.2022.07.029","DOIUrl":"10.1016/j.jes.2022.07.029","url":null,"abstract":"<div>To understand the contribution of new particle formation (NPF) events to ambient fine particle pollution, measurements of particle size distributions, trace gases and meteorological conditions, were conducted at a suburban site (NJU) from October to December 2016 and at an industrial site (NUIST) from September to November 2015 in Nanjing. According to the temporal evolution of the particle size distributions, three types NPF events were observed: typical NPF (Type A), moderate NPF events (Type B) and strong NPF (Type C) events. The favorable conditions for Type A events included low relative humidity, low concentration of pre-existing particles, and high solar radiation. The favorable conditions of Type B events were similar to Type A, except for a higher concentration of pre-existing particles. Type C events were more likely to happen with the higher relative humidity, lower solar radiation and continuous growth of pre-existing particle concentration. The formation rate of 3 nm (J3) was the lowest for Type A events and highest for Type C events. In contrast, the growth rates of 10 nm and 40 nm particles were the highest for Type A, and lowest for Type C. Results show that NPF events with only higher J3 would lead to the accumulation of nucleation mode particles. Sulfuric acid was important for the formation of particles but had little effect on the growth of particle size.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"131 ","pages":"Pages 11-25"},"PeriodicalIF":6.9,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9523644","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

Toxic effects of three perfluorinated or polyfluorinated compounds (PFCs) on two strains of freshwater algae: Implications for ecological risk assessments 三种全氟或多氟化合物对两种淡水藻类的毒性影响:对生态风险评估的影响

IF 6.9

Journal of environmental sciences Pub Date : 2023-09-01 DOI: 10.1016/j.jes.2022.10.042

Liangliang Zhang , Xiaowei Zheng , Xianglin Liu , Jue Li , Yanyao Li , Zeming Wang , Nan Zheng , Xiangrong Wang , Zhengqiu Fan

{"title":"Toxic effects of three perfluorinated or polyfluorinated compounds (PFCs) on two strains of freshwater algae: Implications for ecological risk assessments","authors":"Liangliang Zhang , Xiaowei Zheng , Xianglin Liu , Jue Li , Yanyao Li , Zeming Wang , Nan Zheng , Xiangrong Wang , Zhengqiu Fan","doi":"10.1016/j.jes.2022.10.042","DOIUrl":"10.1016/j.jes.2022.10.042","url":null,"abstract":"<div>Perfluorinated or polyfluorinated compounds (PFCs) continue entering to the environmental as individuals or mixtures, but their toxicological information remains largely unknown. Here, we investigated the toxic effects and ecological risks of Perfluorooctane sulfonic acid (PFOS) and its substitutes on prokaryotes (Chlorella vulgaris) and eukaryotes (Microcystis aeruginosa). Based on the calculated EC50 values, the results showed that PFOS was significantly more toxic to both algae than its alternatives including Perfluorobutane sulfonic acid (PFBS) and 6:2 Fluoromodulated sulfonates (6:2 FTS), and the PFOS-PFBS mixture was more toxic to both algae than the other two PFC mixtures. The action mode of binary PFC mixtures on Chlorella vulgaris was mainly shown as antagonistic and on Microcystis aeruginosa as synergistic, by using Combination index (CI) model coupled with Monte Carlo simulation. The mean risk quotient (RQ) value of three individual PFCs and their mixtures were all below the threshold of 10−1, but the risk of those binary mixtures were higher than that of PFCs individually because of their synergistic effect. Our findings contribute to enhance the understanding of the toxicological information and ecological risks of emerging PFCs and provide a scientific basis for their pollution control.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"131 ","pages":"Pages 48-58"},"PeriodicalIF":6.9,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9521417","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

Novel biomonitoring method for determining five classes of legacy and alternative flame retardants in human serum samples 测定人血清样品中五类遗留和替代阻燃剂的新型生物监测方法

IF 6.9

Journal of environmental sciences Pub Date : 2023-09-01 DOI: 10.1016/j.jes.2022.09.020

Xiaolin Guan , Gaoxin Zhang , Lingling Meng , Mei Liu , Liyuan Zhang , Chuxuan Zhao , Yingming Li , Qinghua Zhang , Guibin Jiang

{"title":"Novel biomonitoring method for determining five classes of legacy and alternative flame retardants in human serum samples","authors":"Xiaolin Guan , Gaoxin Zhang , Lingling Meng , Mei Liu , Liyuan Zhang , Chuxuan Zhao , Yingming Li , Qinghua Zhang , Guibin Jiang","doi":"10.1016/j.jes.2022.09.020","DOIUrl":"10.1016/j.jes.2022.09.020","url":null,"abstract":"<div>Flame retardants (FRs) are ubiquitous in environment and biota and may pose harm to human health. In recent years, concern regarding legacy and alternative FRs has been intensified due to their widespread production and increasing contamination in environmental and human matrices. In this study, we developed and validated a novel analytical method for simultaneous determination of legacy and alternative FRs, including polychlorinated naphthalenes (PCNs), short- and middle-chain chlorinated paraffins (SCCPs and MCCPs), novel brominated flame retardants (NBFRs), and organophosphate esters (OPEs) in human serum. Serum samples were prepared by liquid-liquid extraction using ethyl acetate, and purified with Oasis® HLB cartridge and Florisil–silica gel columns. Instrumental analyses were carried out using gas chromatography-triple quadrupole mass spectrometry, high-resolution gas chromatography coupled with high-resolution mass spectrometry, and gas chromatography coupled with quadrupole time-of-flight mass spectrometry, respectively. The proposed method was validated for linearity, sensitivity, precision, accuracy, and matrix effects. Method detection limits for NBFRs, OPEs, PCNs, SCCPs, and MCCPs were 4.6 × 10–4–8.6 × 10–2, 4.3 × 10–3–1.3, 1.1 × 10–5–1.0 × 10–4, 1.5, and 9.0 × 10–1 ng/mL, respectively. Matrix spike recoveries ranged from 73%–122%, 71%–124%, 75%–129%, 92%–126%, and 94%–126% for NBFRs, OPEs, PCNs, SCCPs, and MCCPs, respectively. The analytical method was applied for detection of real human serum. CPs were the dominant FRs in serum, indicating CPs were widely presented in human serum and should be pay more attention for their health risk.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"131 ","pages":"Pages 111-122"},"PeriodicalIF":6.9,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9526681","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

Effects of combined antibiotics on nitrification, bacteria and antibiotic resistance genes in activated sludge: Insights from legacy effect of antibiotics 联合抗生素对活性污泥中硝化、细菌和抗生素耐药基因的影响:来自抗生素遗留效应的见解

IF 6.9

Journal of environmental sciences Pub Date : 2023-09-01 DOI: 10.1016/j.jes.2022.10.051

Zhong-Xing Zhang, Xiao-Yan Fan, Xing Li, Yu-Xi Gao, Jun-Ru Zhao

{"title":"Effects of combined antibiotics on nitrification, bacteria and antibiotic resistance genes in activated sludge: Insights from legacy effect of antibiotics","authors":"Zhong-Xing Zhang, Xiao-Yan Fan, Xing Li, Yu-Xi Gao, Jun-Ru Zhao","doi":"10.1016/j.jes.2022.10.051","DOIUrl":"10.1016/j.jes.2022.10.051","url":null,"abstract":"<div>The effect of combined antibiotics exposure on nitrogen removal, microbial community assembly and proliferation of antibiotics resistance genes (ARGs) is a hotspot in activated sludge system. However, it is unclear that how the historical antibiotic stress affects the subsequent responses of microbes and ARGs to combined antibiotics. In this study, the effects of combined sulfamethoxazole (SMX) and trimethoprim (TMP) pollution on activated sludge under legacy of SMX or TMP stress with different doses (0.005-30 mg/L) were investigated to clarify antibiotic legacy effects. Nitrification activity was inhibited under higher level of combined exposure but a high total nitrogen removal (∼70%) occurred. Based on the full-scale classification, the legacy effect of past antibiotic stress had a marked effect on community composition of conditionally abundant taxa (CAT) and conditionally rare or abundant taxa (CRAT). Rare taxa (RT) were the keystone taxa in the microbial network, and the responses of hub genera were also affected by the legacy of antibiotic stress. Nitrifying bacteria and genes were inhibited by the antibiotics and aerobic denitrifying bacteria (Pseudomonas, Thaurea and Hydrogenophaga) were enriched under legacy of high dose, as were the key denitrifying genes (napA, nirK and norB). Furthermore, the occurrences and co-selection relationship of 94 ARGs were affected by legacy effect. While, some shared hosts (eg., Citrobacter) and hub ARGs (eg., mdtD, mdtE and acrD) were identified. Overall, antibiotic legacy could affect responses of activated sludge to combined antibiotic and the legacy effect was stronger at higher exposure levels.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"131 ","pages":"Pages 96-110"},"PeriodicalIF":6.9,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9521419","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

Amino acids as indicators of seasonal variations in organic matter degradation in surface sediments from a shallow lake 氨基酸作为浅湖表层沉积物有机质降解季节变化的指示因子

IF 6.9

Journal of environmental sciences Pub Date : 2023-09-01 DOI: 10.1016/j.jes.2022.10.043

Yan Wen , Wenqiang Zhang , Baoqing Shan

{"title":"Amino acids as indicators of seasonal variations in organic matter degradation in surface sediments from a shallow lake","authors":"Yan Wen , Wenqiang Zhang , Baoqing Shan","doi":"10.1016/j.jes.2022.10.043","DOIUrl":"10.1016/j.jes.2022.10.043","url":null,"abstract":"<div>Degradation of organic matter (OM) in sediments is a key link in nutrient cycling and sedimentation processes in lakes. The aim of this study was to explore the degradation of OM in surface sediments of a shallow lake (Baiyangdian Lake, China) under seasonal temperature variations. For this, we used the amino acid-based degradation index (DI) and the spatiotemporal distribution characteristics and sources of OM. Sediment OM in the lake mainly originated from freshwater aquatic plants and terrestrial C4 plants. The sediment at some sampling sites was affected by surrounding crops. The organic carbon and total nitrogen contents, and the total hydrolyzed amino acid concentrations in the sediments were highest in summer and lowest in winter. The lowest DI occurred in spring, which indicated that the OM in the surface sediment at this time was highly degraded and relatively stable, and the highest DI occurred in winter, which showed that the sediment was fresh. The water temperature was positively correlated with the organic carbon content (p < 0.01) and total hydrolyzed amino acids concentration (p < 0.05). Seasonal variations in the overlying water temperature had a large effect on OM degradation in the lake sediments. Our results will facilitate the management and restoration of lake sediments that suffer from endogenous release of OM in a warming climate.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"131 ","pages":"Pages 1-10"},"PeriodicalIF":6.9,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9526683","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