兰州市街道灰尘重金属污染程度及健康风险评价  

Content Evaluation and Risk Assessment of Heavy Metals in Street Dusts in Lanzhou City

作　　者：米璇 王文姬 刘云涛 袁泉 MI Xuan;WANG Wen-ji;LIU Yun-tao;YUAN Quan(College of Geography and Environmental Engineering,Lanzhou City University,Lanzhou Gansu 73007)

机构地区：[1]兰州城市学院地理与环境工程学院,甘肃兰州730070

出　　处：《甘肃高师学报》2018年第5期39-43,共5页Journal of Gansu Normal Colleges

基　　金：兰州城市学院青年教师科研资助项目"壳聚糖-改性凹凸棒土联合调理城市污泥及污泥中重金属形态的影响"(LZCU-QN2017-20);兰州城市学院2017年本科生科研创新基金项目"凹凸棒土表面修饰对污泥调理和重金属钝化的效果研究"(2017-09)

摘　　要：为探索兰州市街道灰尘重金属污染程度及存在的健康风险,在兰州市采集街道灰尘,利用ICP-MS分析样品中的重金属含量.结果表明:兰州市主城区街道灰尘中的重金属平均含量整体偏高,均超出了土壤背景值.富集因子分析表明As为轻微富集,Cu、Pb、Zn属于中度富集,Cd为极强富集.健康风险评价显示,街道灰尘中各金属不同暴露途径的非致癌风险顺序为手-口暴露途径>皮肤暴露途径>呼吸暴露途径,6种重金属对儿童的非致癌风险大于成人;致癌重金属As、Cd、Cr通过呼吸途径不具有致癌风险.In order to explore the degree of contamination and health risk of heavy metals in street dusts in Lanzhou, samples of street dust were collected from 16 sampling site. ICP-MS were used to analyze the content of heavy metals in samples. That result the average contents of heavy metals all higher than average level. Enrichment factor analyzed that the As was the slightly enrichment,Cu,Pb and Zn were moderately enrichment and Cd was pole-strength enrichment. Health risk assessment results showed that the rank of non-cancer hazard risks of heavy metals in street dusts is hand-mouth ingestion〉skin ingestion〉breathe ingestion. The non-cancer hazard risks induced by the 6 heavy metals were higher to children compared to adults. The carcinogenic heavy metals As,Cd and Cr hadn＇t the risk of carcinogenicity from breathe ingestion.

关 键 词：兰州市 街道灰尘 重金属污染 富集因子 健康风险评价 

分 类 号：X53[环境科学与工程—环境工程]