| 摘要: |
| 通过采集下沉广场的地表灰尘样品，测定其中重金
属的含量，分析不同元素之间的相关性，探讨环境因素对重
金属含量的影响，采用健康风险评价模型评价相关风险。结
果表明，北京10座下沉广场地表灰尘中Cd、Pb、Cr、Cu、
Zn和Ni的平均含量分别为0.87、45.30、84.88、52.41、
167.47、24.03mg/kg，除Ni外，依次超过了北京土壤背景值
的3.28、0.84、1.85、1.80、1.91倍。灰尘中的Pb、Cu、
Zn含量具有显著正相关关系，人流密度对Cu含量有显著正相
关影响。下沉广场地表灰尘重金属引起的健康风险处于较低水
平。研究结果为下沉广场的设计和养护管理提供了科学依据。 |
| 关键词: 风景园林 下沉广场 灰尘 重金属 健康风险
评价 |
| DOI： |
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| 基金项目: |
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| Pollution Characteristics and Health Risk Assessment of Heavy Metals in Surface Dusts of Sunken Plazas in Beijing |
| GUO Jia,XU Rui,DAI Ziyun |
| Abstract: |
| By collecting the surface dust samples of sunken plaza,
and determining the content of heavy metals, the correlations
between different elements were analyzed, the influence of
environmental factors on the content of heavy metals was discussed,
and the health risk assessment model was conducted to evaluate
related risks. The results showed that the average content of Cd, Pb,
Cr, Cu, Zn and Ni in sunken plaza dusts were 0.87, 45.30, 84.88,
52.41, 167.47 and 24.03mg/kg respectively, which exceeded 3.28,
0.84, 1.85, 1.80, 1.91 times of the Beijing soil background value
respectively, except Ni. The contents of Pb, Cu and Zn in dust had
a significant positive correlation, and the pedestrian density had a
significant positive correlation effect on Cu. In conclusion, there was
little significant health risk caused by heavy metals in surface dusts
of sunken plaza in Beijing. This study would provide critical facts
for the design and maintenance of sunken plaza. |
| Key words: : landscape architecture sunken plaza dust heavy metal health risk assessment |
