共查询到19条相似文献,搜索用时 156 毫秒
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近些年来雌激素及烷基酚类化合物由于其对水生生物的内分泌干扰作用越来越受到广泛关注.沉积物作为环境中有机污染物的重要储存库,研究目标物在其中的浓度分布对于探明此类物质在环境中的迁移转化具有重要意义.但沉积物中基质组成复杂而雌激素又痕量存在,这增加了前处理的难度.本研究从雌激素及烷基酚类化合物的理化性质入手,采用碱液提取、液液萃取和LC-MS/MS分析测定沉积物样品中的雌激素及壬基酚、辛基酚、双酚A.结果表明,经过优化的方法对7种目标物的回收率介于61.9%~93.7%之间.该方法能有效去除沉积物中那些不溶于强碱和既溶于酸又溶于碱的有机污染物,同时操作简单、成本低,但回收率高、检出限低,可广泛适用于河流沉积物样品及土壤样品的前处理. 相似文献
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环境内分泌干扰物前处理方法研究新进展 总被引:1,自引:0,他引:1
环境内分泌干扰物因其能够紊乱生物体正常内分泌功能而引起人们的广泛关注,然而内分泌干扰物在水环境中浓度极低,水体中复杂机质的干扰较大,在分析监测前一般要经过样品前处理过程,以起到富集痕量组分、消除基体干扰、提高方法灵敏度的作用。针对不同环境样品中内分泌干扰物的前处理方法不同,分别介绍了液体、固体或类固体环境样品的前处理技术,提出了各前处理方法的优缺点,总结并展望了环境内分泌干扰物样品前处理方法的发展方向。 相似文献
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中国城市污水处理厂内分泌干扰物控制优先性分析 总被引:24,自引:4,他引:20
基于已报道的中国城市污水处理厂二级处理出水中内分泌干扰物的浓度,分别在以出水最大浓度为背景的极端情景和以出水中位浓度为背景的一般情景下,计算和分析了工业化学品、农药、天然雌激素、药物4类共32种内分泌干扰物的生态风险商和雌二醇当量浓度.结果表明,在极端情景下,分别有12种和9种物质具有生态风险和内分泌干扰性;其中,分别有6种和5种物质在一般情景下也具有生态风险和内分泌干扰性.在此基础上,通过评分和排序得出在中国城市污水处理厂应当优先控制的4种污染物为炔雌醇、雌酮、壬基酚、双酚A. 相似文献
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活性污泥中典型内分泌干扰物的分析方法 总被引:3,自引:1,他引:3
对代表烷基酚类的典型内分泌干扰物(EDCs)叔辛基酚、辛基酚、壬基酚、双酚A,和代表类固醇的典型内分泌干扰物17α-乙炔基雌二醇和雌三醇等6种物质,建立了活性污泥水相与固相中的SPE-GC/MS的同时分析方法。对比分析了三种不同的固相萃取浓缩小柱的效果,发现具有梯度极性的Bond Elut-Plexa小柱对所选6种内分泌干扰物萃取回收效果较好。通过所建立的方法对6种EDCs在污水和污泥中的浓度进行了分析,检测回收率达80.5%和84.8%以上。并通过该分析方法对上海某污水净化水厂曝气池中污水和污泥浓度进行了有效分析。 相似文献
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采用不主动排泥的运行模式,在相同污泥负荷条件下,对比研究了膜-生物反应器(MBR)与传统活性污泥反应器(CASR)对两种典型内分泌干扰物--双酚A(BPA)与壬基酚聚氧乙烯醚(NPnEO,n=1~4)的去除效果.结果表明,在BPA-污泥负荷与NPnEO-污泥负荷分别为0.046~10.2 g·kg-1·d-1与0.097-0.701 g·kg-1·d-1的范围内,MBR与CASR均能有效去除这2种内分泌干扰物.随着运行时间的延长,污泥对目标物质的去除能力逐渐加强;相比CASB,MBR对目标物质的去除更强且稳定.在获得相同的出水目标物质浓度条件下,MBR可以耐受更高的容积负荷.2种内分泌干扰物的投加对MBR和CASR的COD和NH4-N的去除均没有明显影响. 相似文献
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对国内的饮用水水源地内分泌干扰物污染现状进行总结,发现我国饮用水水源地很多地区都存在着内分泌干扰物的污染,由于地域的不同,污染物的种类存在差异,但有机氯农药和多氯联苯类化合物的污染尤为严重。同时对水源地内分泌干扰物的种类、来源及生物学效应进行综述,并对内分泌干扰物的毒性作用机制进行了归纳,发现不同来源的内分泌干扰物,毒性作用机制不同,且一种内分泌干扰物可能同时存在多种作用机制。 相似文献
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概述了近年来国内外学者对内分泌干扰物健康效应的解释,及其对环境雌激素作用的新认识和男性生殖健康的影响。重点讨论了环境雌激素对男性生殖系统结构和功能的影响,以及造成男性生殖健康不良效应的可能作用机理及其最新研究进展,并简要介绍了对环境雌激素健康机制的进一步研究方向。根据报道,环境雌激素可以通过模拟天然雌激素的受体结合机制,干扰生物体内正常的内分泌生物机制,并使生殖系统的肿瘤发病率上升。 相似文献
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苏州河底泥3种内分泌干扰物的空间分布及环境风险 总被引:2,自引:0,他引:2
应用气相色谱质谱联用方法对苏州河及其支流底泥中3种环境内分泌干扰物壬基酚(NP)、辛基酚(4-t-OP)和双酚A(BPA)的含量进行检测和调查,结果表明,这3种物质在河流底泥中的浓度变幅分别为<1.0~5 800、<0.10~39和0.90~180μg.kg-1,空间分异显著.总体上看,底泥污染物浓度与河流周边人为活动密集程度有关:在苏州河上海市区段底泥的含量显著地高于上海远郊和江苏省内河段底泥含量;苏州河支流底泥中的含量显著高于苏州河干流底泥含量.苏州河及其支流底泥中这3种内分泌干扰物两两之间,存在显著正相关,说明其有相似的物源.以含量较高的壬基酚为例,进行底泥环境内分泌干扰物的风险评估,结果表明,除苏州河江苏省内吴家港桥段外,其它河段均存在潜在的生态毒害风险,需采取相应的防范措施. 相似文献
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It is generally known that there are many endocrine disrupting compounds (EDCs) in the e uents from wastewater treatment
plants (WWTPs). Most research has focused on the occurrence of estrogenic or androgenic activities, while ignoring that there are
environmental chemicals disrupting thyroid system, which is essential for growth and development in both humans and animals. In
the present work, a two-hybrid yeast assay was conducted to evaluate the removal e ciencies of agonistic or antagonistic thyroid
receptor (TR) mediated e ects in di erent treatment processes of three WWTPs located in Beijing. We found no TR agonistic, but TR
antagonistic activities in all processes from the WWTPs. The TR antagonistic activities in organic extracts of water samples were then
calibrated regarding to a known TR-inhibitor, amiodarone hydrochloride (AH). The observed concentration of TR disrupting substances
ranged from 2.35 10??8 to 6.19 10??7 mol/L AH in Gaobeidian WWTP, 3.76 10??8 to 8.75 10??8 mol/L AH in Lugouqiao WWTP,
and 4.80 10??9 to 2.55 10??8 mol/L AH in Beixiaohe WWTP. Of the three WWTPs, the removal rates were 92.7%, 42.2%, and 23.1%
respectively. Industrial sewage may contain more TR disrupting substances compared with domestic sewage. The recipient waters were
found to contain considerable concentrations of TR disrupting substances that may cause adverse e ects on the exposed organisms. 相似文献
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It is generally known that there are many endocrine disrupting compounds (EDCs) in the effluents from wastewater treatment plants (WWTPs). Most research has focused on the occurrence of estrogenic or androgenic activities, while ignoring that there are environmental chemicals disrupting thyroid system, which is essential for growth and development in both humans and animals. In the present work, a two-hybrid yeast assay was conducted to evaluate the removal efficiencies of agonistic or antagonistic thyroid receptor (TR) mediated effects in different treatment processes of three WWTPs located in Beijing. We found no TR agonistic, but TR antagonistic activities in all processes from the WWTPs. The TR antagonistic activities in organic extracts of water samples were then calibrated regarding to a known TR-inhibitor, amiodarone hydrochloride (AH). The observed concentration of TR disrupting substances ranged from 2.35 × 10-8 to 6.19 × 10-7 mol/L AH in Gaobeidian WWTP, 3.76 × 10-s to 8.75 x 10-s mol/L AH in Lugouqiao WWTP,and 4.80 × 10-9 to 2.55 × 10-s mol/L AH in Beixiaohe WWTP. Of the three WWTPs, the removal rates were 92.7%, 42.2%, and 23.1% respectively. Industrial sewage may contain more TR disrupting substances compared with domestic sewage. The recipient waters were found to contain considerable concentrations of TR disrupting substances that may cause adverse effects on the exposed organisms. 相似文献
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Yanmin M Xin He Keyan Qi Tong Wang Yongchao Qi Lele Cui Fengbang Wang Maoyong Song 《环境科学学报(英文版)》2019,31(3):210-217
Recent research indicates that the human infertility rate is increasing. Although various reasons have been hypothesized for the growing infertility rate, environmental contaminants are potentially important causal agents associated with this change. Chemical contaminants are widespread throughout our environment and human exposure is virtually unavoidable. The overall contribution of environmental exposure to infertility is unknown, but studies involving occupational exposure, together with results from animal experiments, suggest that environmental contaminants may adversely affect fertility. We reviewed the adverse effects of environmental exposure on fertility and related reproductive outcomes. Environmental contaminants covered in this review include heavy metals, organic solvents, pesticides and endocrine disrupting chemicals. It is hoped that this review will highlight the need for further research in this area. 相似文献