摘要
采用体外模拟法检测污染点和对照点土壤As对人体生物有效性，通过计算其生物有效量对污染土壤的手一口无意接触途径进行健康风险评价．结果表明，多处采样点土壤的As污染程度相当严重，对儿童健康的绝对风险系数Ka值和相对风险系数Kr值分别是2．6～19．0，1．9～16．4，明显超过世界卫生组织人体健康风险警戒线，个别点甚至达到或超过了成人标准的警戒线，其他样点也接近了警戒线．研究区域的As污染土壤对区域内的人群，特别是儿童构成了严重的人体健康风险，需要采取有效措施进行环境整治．
Arsenic （As） bioaccessibility and risk to human health due to incidental hand-to-mouth behavior in several contaminated soils was assessed using a physiologically-based extraction test （PBET）. Results revealed that the investigated sites were heavily contaminated as the values of the absolute health risk coefficient and relative health risk coefficient fell into the range of 2.6-19.0 and 1.9-16. 4, respectively, which were higher than the permitted maximum As intake level for infant, suggested by WHO, and also exceeded the permitted maximum intake level for adult in the most polluted site. These appears to pose a threat to the local inhabitants, and appropriate environmental countermeasures should be taken into account.
出处
《华侨大学学报（自然科学版）》
CAS
北大核心
2008年第1期152-155,共4页
Journal of Huaqiao University(Natural Science)
基金
福建省自然科学基金资助项目(D0510005)
关键词
砷
土壤污染
风险评估
体外模拟法
生物有效性
arsenic
soil contamination
risk assessment
physiologically-based extraction test
bioaccesibility
