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环境化学  2015 

小城镇街尘污染特征及控制对策

Keywords: 小城镇,街尘,污染,特征,控制

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Abstract:

以重庆市永川区小城镇为例进行调查研究,结果表明,工业园区道路街尘和城乡结合部道路街尘以200μm以上粒径段为主(65%-72%),而商业区和双竹镇街道以200μm以下粒径段为主(60%-72%);有机质和总磷、总氮、锌、铅、镉的最高浓度出现在商业区街尘(分别为103.04mg·g-1和785.48、1672.04、439.72、133.30、8.44mg·kg-1),工业园区道路街尘含有最高的铜、镍浓度(分别为241.52和92.30mg·kg-1).小城镇街道街尘污染评价结果表明,商业区街尘和工业园区道路街尘污染风险较高,其中商业区街尘中的镍处于重度污染等级,工业园区道路街尘中的镉达到极度污染最高等级,同时,小城镇街尘控制对策分析指出,在"源"-"传输过程"-"汇"三个环节分别采取措施控制小城镇街尘污染是可行的.

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