Assessing toxicities of hydrophobic organic pollutants in Huaihe River by using two types of sampling
Assessing toxicities of hydrophobic organic pollutants in Huaihe River by using two types of sampling
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DOI：
10.1081/ese-200045544
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发表时间：
2005-01-01
影响因子：
2.1
通讯作者：
Wang, ZJ
中科院分区：
文献类型：
--
作者：
Ma, M;Wang, CX;Wang, ZJ
采用固相萃取法提取淮河水体中的疏水有机污染物，采用半透膜装置（SPMD）对其进行隔离，采用有机溶剂对沉积物中的疏水有机污染物进行萃取。结合化学分析方法，采用Lumistox试验和乙氧基间苯二酚o -去乙基酶（EROD）试验，评价了该水生环境中微量疏水有机污染物的急性毒性和ah受体相关的毒性效应。淮河水体和沉积物中的急性毒性物质主要有取代苯和农药，主要有2,4,6-三氯酚、阿特拉津、六氯苯和硝基苯，以及持久性EROD诱导剂或ah -激动剂，包括多环芳烃和多氯联苯。急性毒性浓度最高的是河心（H3），而慢性毒性浓度最高的是上游（H1）。在下游（H4），沉积物中的EROD诱导因子表现出更强的持久性。结果还表明，水的采样程序对生物测定的结果有重大影响。用固相萃取法测定水中急性毒物无法获得重要的信息。然而，沉积物提取物和SPMD浓缩液的生物测定显示不同地点的毒性变化模式相似。
Hydrophobic organic pollutants in water from the Huaihe River were extracted by solid phase extraction and sequestered by semipermeable membrane device (SPMD), and those in sediments were extracted by organic solvent. Combined with chemical analysis, Lumistox test and ethoxyresorfin O-deethylase (EROD) assay were carried out for assessing the acute toxicities and the Ah-receptor-related toxic effects of the trace hydrophobic organic pollutants in this aquatic environment. The acute toxicants in water and sediment of the Huaihe River included substituted benzenes and pesticides, mainly 2,4,6-trichlorophenol, atrazine, hexachlorobenzene, and nitrobenzenes as well as persistent EROD inducers or Ah-agonists, including PAHs and PCBs, were determined. The highest acute toxicant concentration occurred at the center of the river (H3), while highest chronic toxicants occurred at upstream (H1). At downstream (H4), the EROD inducers in sediment depicted more persistency. The results also showed that the sampling procedures for waters have significant influences on the results of bioassays. Bioassay for acute toxicants in water using SPE was unable to obtain important information. However, bioassays for sediment extracts and SPMD concentrates showed similar pattern of toxic variation among different locations.