Organochlorine pesticides (M) and polychlorinated biphenyls (PCBs) in sediments and crabs (Chasmagnathus granulata, Dana, 1851) from mangroves of Guanabara Bay, Rio de Janeiro State, Brazil
Organochlorine pesticides (M) and polychlorinated biphenyls (PCBs) in sediments and crabs (Chasmagnathus granulata, Dana, 1851) from mangroves of Guanabara Bay, Rio de Janeiro State, Brazil
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DOI：
10.1016/j.chemosphere.2007.04.093
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发表时间：
2008-08-01
期刊：
影响因子：
8.8
通讯作者：
Serejo, Cristiana Silveira
中科院分区：
文献类型：
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作者：
de Souza, Alexandre Santos;Machado Torres, Joao Paulo;Serejo, Cristiana Silveira
从巴西里约热内卢附近的红树林采集的沉积物和螃蟹（Chasmagnathus granulata）样品中测定了有机氯化合物、7种指示性多氯联苯同系物、滴滴涕及其主要代谢物。根据FAO/SIDA协议，使用连续非极性溶剂萃取和常规GC-ECD装置对样品进行分析。沉积物中多氯联苯同系物总量和滴滴涕代谢物总量的最高水平分别为184.16和37.40 ng g（-1）d.w.。分别为570.62和98.22 ng g（-1）d.w.。在受影响的红树林中发现。多氯联苯同源物的含量高于滴滴涕代谢物的含量，这表明在这一领域的工业影响更大。结果表明，沉积物污染对蟹类种群密度有负面影响，主要反映在雌卵中有机氯含量上。鸡蛋中的有机氯含量对评价或估计这些污染物对C. granulata种群中的有机氯含量高于沉积物样品中的有机氯含量。(c)2008爱思唯尔有限公司保留所有权利。
Organochlorinated compounds, seven indicator PCB congeners, DDT and its main metabolites, were determined in sediment and crab (Chasmagnathus granulata) samples collected from mangrove areas near Rio de Janeiro, Brazil. Samples were analysed according to the FAO/SIDA protocols using continuous non-polar solvent extraction and a conventional GC-ECD apparatus. The highest levels of total PCB congeners and total DDT metabolites in sediments (184.16 and 37.40 ng g(-1) d.w. respectively) and crab eggs (570.62 and 98.22 ng g(-1) d.w. respectively) were found at impacted mangroves. The higher PCB congeners than DDT metabolites levels suggesting a stronger industrial impact in this area. The results indicate that the population density of crab is negatively affected by sediment contamination that is reflected basically by the organochlorine content in the female eggs. The organochlorine concentration in eggs is more significant to evaluate or estimate an impact of these pollutants upon C. granulata population than the organochlorine concentration in sediment samples. (c) 2008 Elsevier Ltd. All rights reserved.