Assessment of contamination levels and exposure risk of perfluoroalkyl substances (PFOS and PFOA) in Vietnamese fish

Lieu Tran Thi, Anh Hoang Quoc, Anh Huong Nguyen Thi, Nhat Tu Minh, Nghia Nguyen Trong, Chuc Nguyen Thi, Quynh Hoa Nguyen Thị, T. Le Huu
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Abstract

Contamination levels of two typical perfluoroalkyl substances (PFASs) including perfluorooctane sulfonic acid (PFOS) and perfluorooctanoic acid (PFOA) were evaluated in Vietnamese fish samples by using our monitoring results and database reported in previous studies. In freshwater fish taken from West and Yen So Lakes (Hanoi), PFOS and PFOA concentrations ranged from < 0.030 to 0.48 (mean 0.12) ng/g, and from < 0.010 to 0.19 (mean 0.058) ng/g, respectively. These levels were comparable to those measured in fish samples from other areas in Vietnam, but were generally lower than values documented for fish samples from other countries. PFOS and PFOA daily intake doses via fish consumption ranged from 0.015 to 0.48 (mean 0.12) and from 0.005 to 0.20 (mean 0.065) ng/kg/day. In general, these intake doses were lower than the reference dose of 20 ng/kg/day, suggesting acceptable levels of risk.
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评估越南鱼类中全氟烷基物质(PFOS和PFOA)的污染水平和暴露风险
利用我们在以往研究中报告的监测结果和数据库,评估了越南鱼类样本中两种典型的全氟烷基物质(PFASs),包括全氟辛烷磺酸(PFOS)和全氟辛酸(PFOA)的污染水平。在河内市西湖和银苏湖的淡水鱼中,全氟辛烷磺酸和全氟辛酸的浓度范围分别为< 0.030 ~ 0.48(平均0.12)ng/g和< 0.010 ~ 0.19(平均0.058)ng/g。这些水平与越南其他地区鱼类样本中测量到的水平相当,但通常低于其他国家鱼类样本记录的值。通过食用鱼类摄入全氟辛烷磺酸和全氟辛烷磺酸的日剂量范围为0.015至0.48纳克(平均0.12纳克)和0.005至0.20纳克(平均0.065纳克)/千克/天。总的来说,这些摄入剂量低于20纳克/千克/天的参考剂量,表明存在可接受的风险水平。
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