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国家自然科学基金(21077123)

作品数:7 被引量:58H指数:4
相关作者:魏东斌杜宇国李立平阴俊霞李敏更多>>
相关机构:中国科学院生态环境研究中心兰州理工大学更多>>
发文基金:国家自然科学基金国家高技术研究发展计划更多>>
相关领域:环境科学与工程更多>>

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Acute toxicity evaluation for quinolone antibiotics and their chlorination disinfection processes被引量:4
2014年
Acute toxicity of 21 quinolone antibiotics was monitored using photobacterium Vibriofischeri assay. The minimum IC20 (inhibitory concentration for 20% luminescence elimination) was obtained at the least 18.86 μmol/L for the tested quinolones. A quantitative structure-activity relationship model was established to investigate the possible mechanism for the acute toxicity. The critical physicochemical descriptors, describing a and atom electronegativity, implied that the electron transfer might occur between the quinolones and photobacterium V. fischeri. Although the quinolones exhibited limited acute toxicity to photobacterium, toxicity elevation was detected after their chlorination. Hence, chlorination disinfection treatment of quinolone-containing water should be of concerns.
Min LiDongbin WeiYuguo Du
医药品和个人护理用品(PPCPs)类污染物氯化转化行为研究进展被引量:14
2012年
针对水处理过程的消毒环节,着重探讨了医药品和个人护理用品(PPCPs)等新型环境污染物在氯化消毒过程中发生的转化行为,并分别针对酚类、醇类、醚类、酮类、胺类等典型结构化合物的氯化转化规律进行了归纳总结.同时,对消毒副产物所引起的潜在环境风险、健康效应进行了评述,为研发、优化该类污染物的处理工艺、提高风险管理水平提供科学依据.
刘奇魏东斌陈振斌杜宇国
关键词:PPCPS消毒氯化消毒副产物
Formation pathways of brominated products from benzophenone-4 chlorination in the presence of bromide ions被引量:3
2014年
The brominated products, formed in chlorination treatment of benzophenone-4 in the presence of bromide ions, were identified, and the formation pathways were proposed.Under disinfection conditions, benzophenone-4 would undertake electrophilic substitution generating mono- or di-halogenated products, which would be oxidized to esters and further hydrolyzed to phenol derivatives. The generated catechol intermediate would be transformed into furan-like heterocyclic product. The product species were p H-dependent,while benzophenone-4 elimination was chlorine dose-dependent. When the chlorination treatment was performed on ambient water spiked with benzophenone-4 and bromide ions, most of brominated byproducts could be detected, and the acute toxicity significantly increased as well.
Ming XiaoDongbin WeiLiping LiQi LiuHuimin ZhaoYuguo Du
关键词:BENZOPHENONECHLORINATION
有机紫外防晒剂内分泌干扰效应研究进展被引量:24
2012年
有机紫外防晒剂是一类新兴环境污染物,大量研究表明,部分有机紫外防晒剂能模拟生物体内多种激素的作用,干扰动物和人体正常的内分泌功能,造成严重的健康威胁.本文在大量文献调研的基础上,从个体水平、器官水平、细胞水平和分子水平4个层次,就有机紫外防晒剂对生殖系统、青春期发育、成活率、pS2蛋白、卵黄蛋白原及激素受体等多方面的影响进行了综述,以加深对紫外防晒剂的认识,也为紫外防晒剂的正确使用及相关部门对其进行科学管理提供参考.
李立平魏东斌李敏肖铭阴俊霞杜宇国
关键词:生殖卵黄蛋白原激素受体
锰氧化物对有机污染物的转化机制研究进展被引量:10
2013年
以土壤/沉积物中普遍存在且具有较强氧化活性的锰氧化物为研究对象,探讨了水-锰氧化物体系对医药品和个人护理用品等典型环境污染物的转化行为,并从污染物的分子结构出发,分别综述了锰氧化物对酚类、胺类、氮杂环、氮杂环N-氧化物、酸类等典型环境污染物的分子转化机制.为该类污染物环境行为及其潜在风险的科学评价、有效控制奠定理论基础.
李媛魏东斌杜宇国
关键词:有机污染物锰氧化物
Acute toxicity formation potential of benzophenone-type UV filters in chlorination disinfection process被引量:5
2014年
Benzophenones (BPs) are a class of widely used UV filters, which have been frequently detected within multiple environmental matrices. Disinfection is a necessary process in water treatment processes. The transformation behaviors and toxicity changes of 14 BP-type UV filters during chlorination disinfection treatment were investigated in this study. A new index, the acute toxicity formation potential, was proposed to evaluate the toxicity changes and potential risks of BP-type UV filters during chlorination treatment. It was found that 13 of 14 BP-type UV filters exhibited toxicity decreases in the chlorination disinfection process, more or less, while one showed a toxicity increase. The toxicity changes were dependent on substitution effects, such that 2,4-di-hydroxylated or 3-hydroxylated BPs exhibited significant toxicity decreases after chlorination treatment due to the ready cleavage of the aromatic ring. Importantly, the acute toxicity changes could be duplicated in an ambient water matrix.
Qi LiuZhenbin ChenDongbin WeiYuguo Du
头孢曲松氯化消毒转化产物鉴定及机理研究被引量:1
2013年
以头孢曲松为目标化合物,探索其在氯消毒处理中的转化机理.结果显示头孢曲松在氯化处理中主要发生两种反应,一种为氧化反应,另一种为氯化反应.头孢曲松分子中的硫醚官能团经氧化生成亚砜产物,消毒剂中的氯原子与噻唑环中的4-C原子发生亲电取代反应生成氯代产物.更为重要的是,本研究还探讨了低浓度头孢曲松在环境水体基质中的氯化转化特征,结果表明,本文所推测的反应机理在含头孢曲松的实际环境水样的氯化处理中同样发生.
李立平魏东斌杜宇国
关键词:头孢曲松氯化消毒副产物
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