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• 研究报告 • 上一篇    下一篇

沈阳市采暖期与非采暖期的街道灰尘重金属暴露

郑冬梅1,2*,金丹1,2,蔺昕1,2,李卉颖1,2   

  1. (1沈阳大学环境学院, 沈阳 110044; 2沈阳大学区域污染环境生态修复教育部重点实验室, 沈阳 110044)
  • 出版日期:2016-04-10 发布日期:2016-04-10

The exposure of heavy metals of street dust during heating period and unheating period in Shenyang.

ZHENG Dong-mei1,2*, JIN Dan1,2, LIN Xin1,2, LI Hui-ying1,2   

  1. (1Environmental College, Shenyang University, Shenyang 110044, China; 2Key Laboratory of Regional Environment and Ecoremediation, Ministry of Education, Shenyang University, Shenyang 110044, China).
  • Online:2016-04-10 Published:2016-04-10

摘要: 分析了沈阳市采暖期和非采暖期街道灰尘重金属的空间分布特征,并利用健康风险评价模型评价了两个时期重金属对人体健康的危害。结果表明:采暖期,4种重金属Zn、Cu、Pb和Cd的平均含量分别是土壤背景值的13.23、2.87、3.68和7.35倍,非采暖期分别是土壤背景值的4.52、3.12、3.33和6.64倍;采暖期,Zn和Pb平均含量的大小顺序为居民点>工业点位>商业网点,Cu为工业点位>商业网点>居民点,Cd为工业点位>居民点>商业网点;非采暖期,除居民点Pb含量较高外,其他重金属含量均低于工业点位和商业网点;4种重金属的非致癌风险评价结果为采暖期Pb>Zn>Cu>Cd,非采暖期Pb>Cu>Cd>Zn,其值均小于1,可以认为对人体的非致癌风险较小或可以忽略。

关键词: 品种搭配, 热量资源, 温度生长期, 双季稻, 安全生长期, 气候变化

Abstract: The aim of this work was to study the distribution characteristics of heavy metals in street dust during heating period and unheating period, and their health risk to human due to dust exposure in Shenyang. The mean Zn, Cu, Pb and Cd contents in street dust were 13.23, 2.87, 3.68, and 7.35 times as high, respectively, as the background values in soil during heating period, and these values were 4.52, 3.12, 3.33, and 6.64 times high during unheating period. In heating period, the contents of Zn and Pb were in order of residential area > industrial area > commercial area, the Cu content was in order of industrial area > commercial area > residential area, and the Cd content was in order of industrial area > residential area > commercial area. In unheating period, the contents of heavy metals in street dust in residential area were lower than those in industrial area and commercial area, except Pb. The sequence of noncarcinogenic risk (HI) was Pb>Zn>Cu>Cd in heating period, while it was Pb>Cu>Cd>Zn in unheating period. Almost HI values in this study were lower than 1, indicating that the risks of these metals to human health were low or could be ignored.

Key words: safe growth period, breed collocation, climate change, thermal resources, double cropping rice, thermal growth period