不同施工阶段地表灰尘重金属污染比较研究

Comparative Study of Heavy Metal Pollution of Surface Dust in Different Construction Phases

通过不同粒径地表灰尘量和重金属浓度分析,对挖槽、结构和装修等3个施工阶段重金属污染程度进行探讨。结果表明,挖槽阶段单位面积地表灰尘量最大,结构阶段重金属污染水平最高。随着施工进度,105~150μm粒径灰尘量比例逐步减少,105μm以下粒径灰尘量比例逐步增加。5种重金属浓度比例在不同施工阶段表现不同,锌浓度比例逐步降低,铅浓度比例逐步增加。

The heavy metals pollution degree of the dredging, structure and decoration construction phases are discussed by analyzing the different size of surface dust and heavy metal concentration. The results show that, the mass per unit area of surface dust in dredging phase is the largest and the heavy metal pollution level in structure phase is the highest. With the progress of construction, the ratio of 105~150 μm diameter dust gradually reduced, and under 105 μm diameter dust gradually increased. In the different construction phase, five kinds of heavy metal concentration ratios show different. Zinc concentration ratio has showed downward trend, and plumbum concentration ratio has showed increasing trend.