Su Yang, Bao Lian-Jun, Zeng Eddy Y
State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
University of Chinese Academy of Sciences, Beijing 100049, China.
Huan Jing Ke Xue. 2018 Apr 8;39(4):1861-1871. doi: 10.13227/j.hjkx.201707151.
To examine the distributional patterns of persistent organic pollutants in the wild fish of Hong Kong and assess the health risks associated with consuming them, two typical kinds of persistent organic pollutants, such as dichlorodiphenyltrichloroethane (DDTs) and polychlorinated biphenyls (PCBs), were determined in 31 kinds of fishes caught from the coastal areas of Hong Kong. The results indicate that the concentrations of DDTs and PCBs in the wild fishes were in the ranges of 0.44-17 ng·g and 0.028-6.3 ng·g, respectively, which were at the low end of the global ranges. Spatially, the lowest concentrations of DDTs and PCBs were found in the fishes occurring in the west of Lantau Island and Tolo Harbor. Furthermore, the feeding habits and living environments of the fishes could have some influence on the accumulation of DDTs and PCBs in them. Source diagnostics indicated that DDTs in these fishes mainly originated from historical residues, but the fishes which migrate for relatively longer distances may be subject to DDT contamination in the estuaries. Finally, human health risk assessments suggested that the increased potential lifetime cancer risk of local adolescences and adults exposed to DDTs and PCBs via wild fish consumption was high. Therefore, the local residents in Hong Kong should reduce their daily intake of wild fish caught from the surrounding coastal regions.
为研究香港野生鱼类中持久性有机污染物的分布模式，并评估食用这些鱼类所带来的健康风险，对从香港沿海地区捕获的31种鱼类中的两种典型持久性有机污染物，即滴滴涕（DDTs）和多氯联苯（PCBs）进行了测定。结果表明，野生鱼类中滴滴涕和多氯联苯的浓度分别在0.44 - 17 ng·g和0.028 - 6.3 ng·g范围内，处于全球范围的低端。在空间上，大屿山以西和吐露港的鱼类中滴滴涕和多氯联苯的浓度最低。此外，鱼类的摄食习性和生活环境可能会对它们体内滴滴涕和多氯联苯的积累产生一定影响。源诊断表明，这些鱼类中的滴滴涕主要来源于历史残留，但洄游距离相对较长的鱼类可能会在河口受到滴滴涕污染。最后，人体健康风险评估表明，当地青少年和成年人通过食用野生鱼类接触滴滴涕和多氯联苯而增加的潜在终身癌症风险很高。因此，香港当地居民应减少日常从周边沿海地区捕获的野生鱼类的摄入量。
