沈阳细河流域土壤和作物中汞的潜在生态危害及健康风险评价Assessment of Potential Ecological and Health Risk of Mercury in Soils and Plants along Xi River Watershed in Shenyang
廉梅花;孙丽娜;王辉;李登宇;关雪;
摘要(Abstract):
为研究沈阳市细河流域土壤汞(Hg)的污染和健康风险状况,对该区土壤和农作物中Hg的含量和分布进行了调查和分析。采用Hakanson潜在生态风险危害指数法评价土壤Hg的污染状况,并利用健康风险评价模型对Hg通过不同暴露途径所引起的健康风险作出评价。研究结果表明,细河流域土壤Hg的潜在生态危害相对较大,其中43.21%样品处于中等危害程度,26.62%属于强及以上风险级别。健康风险评价模型计算表明,人体经食物摄取是土壤Hg暴露的主要途径,Hg日平均暴露剂量依次为食物摄取>呼吸暴露>皮肤暴露;成人和儿童的非致癌危害指数分别为0.315和0.713,均低于风险阈值1,表明Hg不会对人体造成健康危害。
关键词(KeyWords): 沈阳;细河;汞;潜在生态危害;健康风险评价
基金项目(Foundation): 国家自然科学基金重点项目(21037002);; 973计划项目(2014CB441106);; 沈阳市科技计划项目(F14-133-9-00)
作者(Author): 廉梅花;孙丽娜;王辉;李登宇;关雪;
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