Predicting bioaccumulation of PAHs in the trophic chain in the estuary region of Paranagua, Brazil
Predicting bioaccumulation of PAHs in the trophic chain in the estuary region of Paranagua, Brazil
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DOI：
10.1007/s10661-010-1444-1
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发表时间：
2011-03-01
影响因子：
3
通讯作者：
Machado, Karina Scurupa
中科院分区：
文献类型：
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作者：
Froehner, Sandro;Maceno, Marcell;Machado, Karina Scurupa
调查了巴西南部巴拉那瓜河口地区沉积物和水样中多环芳烃(PAH)化合物的存在情况。该地区有很多港口活动。休闲捕鱼很普遍；因此，人们担心可能会受到多环芳烃的污染。对16种优先的多环芳烃进行了调查，仅发现8种。多环芳烃的总浓度在40.8~406.8 ng/g之间，高分子量的多环芳烃含量最高，低分子量的多环芳烃含量较少。有人怀疑多环芳烃的主要来源是燃烧，但存在一些不确定因素，甚至可能存在因原油意外泄漏而产生的多环芳烃。虽然沉积物含有多环芳烃，但数量低于巴西环境立法允许的最高浓度，也低于观察到不利影响的最高水平。根据分析结果，使用数学模型评估了当地营养链中可能的生物积累(Arnot和Gobas，Environ Toxicol Chem 23(10)：2343-2355,2004)。该模型表明，沿着所选择的食物链存在生物放大的可能性。选择了三种本地消耗量较大的鱼类，在这些鱼类中发现了一些多环芳烃的浓度。
The presence of polycyclic aromatic hydrocarbon (PAH) compounds in sediment and water samples collected in the estuary area of Paranagua, southern Brazil, was investigated. There is a lot of port activity in the region. Recreational fishing is widespread; thus, there is concern about possible contamination by PAHs. The 16 priority PAHs were investigated, and only eight were found. The total concentration of PAHs ranged from 40.8 to 406.8 ng/g. High molecular weight were the most abundant, while PAHs with a low molecular weight were absent. There are suspicions that the main source of PAHs is combustion, but some uncertainties exist, and there may even be the presence of PAHs resulting from accidental spills of crude oil. Although the sediments contain PAHs, the amount is below the maximum concentrations allowed by the Brazilian environmental legislation, as well as the maximum levels at which adverse effects are observed. From the analytical results, a probable bioaccumulation was assessed in the local trophic chain using a mathematical model (Arnot and Gobas, Environ Toxicol Chem 23(10):2343-2355, 2004). The model showed that there is a possibility of biomagnification along the food chain selected. Three fishes with high local consumption were selected, and the concentration of some PAHs could be found in those fishes.