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Cadmium in agricultural soils,vegetables and rice and potential health risk in vicinity of Dabaoshan Mine in Shaoguan,China 总被引:6,自引:0,他引:6
Soil cadmium (Cd) contamination resulted from mining and smelting is a major environmental concern,and health risk associated with Cd exposure to multi-media through muti-pathway is increasing.Cd concentrations in soils,vegetables and paddy rice were investigated,and potential non-carcinogenic and carcinogenic health risks exposure to Cd were estimated at six villages around the Dabaoshan Mine,South China.A total of 87 soil samples were found to exceed the China's maximum permission level (MPL) for Cd,while the highest value of 4.42 mg/kg was found near irrigation ditch associated with Hengshi River in Xinyi (XY) Village.Cd contents in vegetables and rice exceeded the maximum permissible concentration by more than five times in every village.Cadmium accumulation in plants is in the order of celery 〉 lactuca sativa L 〉 Chinese cabbage 〉 Romaine lettuce 〉 asparagus lettuce 〉 mustard 〉 cabbage mustard 〉 cabbage.The mean hazard quotient (HQ) of all villages is in the range of [5.29,25.75],and the mean values of cancer risk for investigated areas are more than 10 times greater than the USEPA (2009) threshold limit value of 10-4.Moreover,human non-carcinogenic and carcinogenic risks are mainly attributable to paddy rice intake,followed by vegetables intake,soil ingestion,inhalation,and dermal contact.The results indicate that Cd has a huge potential risk on human health for the local residents. 相似文献
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饮水途径是人体健康影响的重要途径之一.计算了济南市成人、青少年和幼儿的饮用水源地饮用水中污染物所致的平均个人年健康风险.计算结果表明:饮用水质引起的成人、青少年、幼儿和总健康风险方面来分别为1.21×10-4、1.28×10-4和1.39×10-4均高于国际防辐射委员会的最大可接受风险5.0×10-5和美国环保署规定的最高限制1.0×10-4风险级别;不确定性风险分析表明,成人、儿童和青少年的健康风险范围分别为(0.50×10-4,1.44×10-4)、(1.10×10-4,1.51×10-4)和(0.99×10-4,2.15×10-4),大多高于两权威机构推荐限制,说明该区域居民的饮用水健康风险非常值得关注. 相似文献
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PCDD/Fs具有"致癌、致畸、致突变"等"三致"的特性,PCDD/Fs对生态系统和人体健康均有很大的危害。文章对比研究了联合国环境规划署、澳大利亚、中国、台湾等国家和地区的二噁英排放量和排放清单,结果表明各位为二噁英削减工作取得了很大的成绩,而且各国的排放量和排放清单结构差异比较大。联合国环境规划署统计表明68个国家的二恶英年总排放量每约58500克毒性当量(WHO-TEQ),排放到空气中占了总排放量的45%,世界各国二噁英的排放清单差异较大,如澳大利亚以交通运输和金属冶炼为主,我国的金属冶炼(45.6%)排放量最大,台湾则是炼铜、小型焚烧厂的贡献率比较大。 相似文献
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