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| 施工扬尘环境下短时强降雨屋面径流中砷、汞、铅、镉、锌的污染特征研究 |
| Pollution Characteristics of Arsenic,Mercury,Lead,Cadmium and Zinc in Short term Storm Roof Runoff with Condition of Construction fugitive dust |
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| DOI： |
| 中文关键词: 砷 汞 铅 镉 锌 污染特征 屋面径流 短时强降雨 南京 |
| 英文关键词: As Hg Pb Cd Zn Pollution characteristics Roof runoff Short term storm Nanjing |
| 基金项目:国家自然科学基金资助项目（41401546） |
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| 中文摘要: |
| 以南京北郊为例，测量分析了屋面径流中砷（As）、汞（Hg）、铅（Pb）、镉（Cd）和锌（Zn）5种元素的浓度、形态特征。结果表明：短时强降雨过程中这5种元素浓度在较大范围内无规则波动，且不同元素间浓度分布存在较大差异；Zn与Pb的平均浓度分别高于《地表水环境质量标准》（GB 3838—2002）的Ⅴ类和Ⅳ类标准限值，污染程度从大到小依次为Zn＞Pb＞As＞Hg＞Cd。元素形态分析表明，径流中除Hg外其他4种元素主要以颗粒态形式存在，各元素颗粒态占总形态的平均分数分别为：As，64.5%；Hg，43.7%；Pb，76.5%；Cd，54.6%；Zn，54.3%。 |
| 英文摘要: |
| In this study,the pollution characteristics of arsenic (As),mercury (Hg),lead (Pb),cadmium (Cd) and zinc (Zn) were determined for short term roof runoff with condition of construction fugitive dust.Results indicated that the concentration of elements varied to a high degree during the rainfall period,and it indicated big difference between different elements concentration.Based on both event mean concentrations and fluxes,it can be concluded that the elements pollution may be ranked as Zn＞Pb＞As＞Hg＞Cd.In terms of fractionation,elements in the particulate phase dominated the runoff pollution; the mean fraction of elements in the particulate phase to total phase was 64.5%,43.7%,76.5%,54.6% and 54.3%,respectively for As,Hg,Pb,Cd and Zn. |
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