JOURNAL OF HAZARDOUS MATERIALS
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2024
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IF 12.2
Yanhao Zhang,Zifang Peng,Peiru Luo,Lin Zhu,Qingyun He,Congcong Pei,Dan Yin,Wenfen Zhang,Shusheng Zhang,Zongwei Cai
The broad application of various pesticides guarantees the development of agriculture all over the word but has ultimately led to their ubiquitous release into the environment as hazardous chemical residues. Diamide insecticides (DAIs) are regarded as new choice for prevention and protection of agricultural crops and city landscaping plants from the pests in more and more countries. However, their presence in fine particulate matter (PM 2.5 ) and associated health risks have not been studied. We reported for the first time the extensive distributions of PM 2.5 -bound DAIs in rural and urban areas of China, one of the world’s largest agricultural countries. Eight DAIs were analyzed, and five were consistently detected in PM 2.5 samples at concentrations primarily of pg m −3 level. Evident spatial/temporal variations were observed, with generally more serious DAIs’ contamination and long-term health risks in rural areas during spring, summer and autumn. The first exploration of DAIs’ toxicities on human bronchial epithelial cells discovered their capability of inhibiting cell viabilities, further demonstrating the potential detrimental effects of these emerging pollutants in PM 2.5 . This study confirms the widespread appearance of DAIs in PM 2.5 , emphasizing the need and urgency for concern about their pollution in both rural and urban air.
研究领域:
环境科学
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毒理学
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公共卫生
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产品关联
DOI
PubMed
高影响因子
WATER RESEARCH
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2022
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IF 13.4
Yi Liu,Wenhua Dong,Shuyi Shen,Fanxu Meng,Jiajia Wang,Kun Yang,Daohui Lin
Cost-effective disinfection technology is urgently needed in poor rural areas. Erythrosine (ERY)-based solar disinfection (SODIS) provides a promising solution because of its effective inactivation of viruses and gram-positive bacteria at low cost. However, the poor gram-negative bacteria (G − , e.g., Escherichia coli ) inactivation of photosensitized ERY inhibits its application. Herein, for the first time, the protonation of ERY was found to greatly enhance its G − inactivation, and 99.99999% (7.0 log) of E. coli were completely inactivated within only 30 s using 2.5 mg/L ERY under 200 mW/cm 2 visible light irradiation. The inactivation rate constant ( k ) reached 17.5 min −1 at pH 4.0, which was 4730 times higher than that at pH 7.0. At a lower pH, more severe cell wall and genomic DNA damage was observed. A linear correlation between k and monoanionic ERY (HE − ) content was obtained, indicating that HE − rather than dianionic ERY (E 2− ) participated in the inactivation at pH 5.0–7.0, which was further explained by the higher production of reactive oxygen species and bacterial adsorption of HE − than E 2− . Both 1 O 2 and O 2 − • dominated bacterial inactivation, contributing 56.8% and 43.2%, respectively. O 2 − • but not 1 O 2 caused ERY photobleaching. OH • was not involved in either inactivation or photobleaching. Humic acid and salts (NaCl, Na 2 SO 4 , CaCl 2 , and MgCl 2 ) slightly inhibited inactivation, while NaHCO 3 accelerated inactivation. Complete inactivation (99.9999%) of E. coli was achieved within ∼30 min at pH 5.0 in ERY-based SODIS with good adaptation to various water matrices and weather (sunny or partly cloudy). This work will help to promote the application of ERY-based disinfection especially for SODIS in poor rural areas.
研究领域:
环境科学
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水处理
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微生物学
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光化学
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产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2023
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IF 9.8
Min Wang,Haibo Wang,Chisheng Hu,Jianmian Deng,Baoyou Shi
Polyvinyl chloride (PVC) pipes are widely used as drinking water distribution pipes in rural areas of China. However, whether phthalate acid esters (PAEs) released from PVC pipes will affect tap water quality is still unknown. The influence of released PAEs on the water quality was analysed in this study, especially after ClO 2 disinfection. The results indicated that ClO 2 disinfection could control the growth of total coliforms and heterotrophic bacteria (HPC). However, when the ClO 2 residual decreased to below 0.10 mg/L, HPC and opportunistic pathogens, including Mycobacterium avium and Pseudomonas aeruginosa , increased significantly. In addition, after ClO 2 disinfection, PAEs concentrations increased from 10.6–22.2 μg/L to 21.2–58.8 μg/L in different sampling cites. Linear discriminant analysis (LDA) effect size (LEfSe) and statistical analysis of metagenomic profiles (Stamp) showed that ClO 2 disinfection induced the enrichment of Pseudomonas , Bradyrhizobium , and Mycobacterium and functions related to human diseases, such as pathogenic Escherichia coli infection, shigellosis, Staphylococcus aureus infection, and Vibrio cholerae infection. The released PAEs not only promoted the growth of these ClO 2 -resistant bacterial genera but also enhanced their functions related to human diseases. Moreover, these PAEs also induced the enrichment of other bacterial genera, such as Blastomonas , Dechloromonas , and Kocuria , and their functions, such as chronic myeloid leukaemia, African trypanosomiasis, leishmaniasis, hepatitis C and human T-cell leukaemia virus 1 infection. The released PAEs enhanced the microbial risk of the drinking water. These results are meaningful for guaranteeing water quality in rural areas of China.
研究领域:
环境科学
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微生物学
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公共卫生
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水利工程
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产品关联
DOI
PubMed
高影响因子
Frontiers in Microbiology
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2019
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IF 4.259
Chi Xiaohui,Berglund Björn,Zou Huiyun,Zheng Beiwen,Börjesson Stefan,Ji Xiang,Ottoson Jakob,Lundborg Cecilia Stålsby,Li Xuewen,Nilsson Lennart E.
Klebsiella pneumoniae is a gram-negative, opportunistic pathogen, and a common cause of healthcare-associated infections such as pneumonia, septicemia, and urinary tract infection. The purpose of this study was to survey the occurrence of and characterize K. pneumoniae in different environmental sources in a rural area of Shandong province, China. Two hundred and thirty-one samples from different environmental sources in 12 villages were screened for extended-spectrum β-lactamase-(ESBL)-producing K. pneumoniae, and 14 (6%) samples were positive. All isolates were multidrug-resistant and a few of them belonged to clinically relevant strains which are known to cause hospital outbreaks worldwide. Serotypes, virulence genes, serum survival, and phagocytosis survival were analyzed and the results showed the presence of virulence factors associated with highly virulent clones and a high degree of phagocytosis survivability, indicating the potential virulence of these isolates. These results emphasize the need for further studies designed to elucidate the role of the environment in transmission and dissemination of ESBL-producing K. pneumoniae and the potential risk posed to human and environmental health.
研究领域:
微生物学
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传染病学
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环境卫生
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公共卫生
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分子生物学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）