College of Resource Environment and Tourism, Capital Normal University, Beijing 100048, China.
Int J Environ Res Public Health. 2022 Oct 11;19(20):13019. doi: 10.3390/ijerph192013019.
In this study, a large construction waste dump in Beijing, China, was used as the study area. Nineteen effective atmospheric dust samples were collected. The mass fractions of 14 metal elements (Ca, Fe, Al, Mg, Mn, Zn, Cr, Cu, V, Pb, Ni, As, Co, and Cd) were determined for the samples using ICP-MS. The pollutants and the potential ecological risk levels of 10 different heavy metals were evaluated using the enrichment factor, geo-accumulation index, and a potential ecological risk assessment method. The results showed that the Ca, Fe, Al, and Mg contents in the dust fall were considerably high and accounted for 98.81% of the total mass of the analysed metals. Cd and Zn were the main metal contaminants in the dust fall in the vicinity of the construction waste dump, followed by Cu and Mn. The Cd, Zn, Cu, and Mn contents in the construction waste had a significant impact on atmospheric pollution within 250 m of the dump. Moreover, Cd had the largest contribution to the comprehensive ecological risk posed by the heavy metals in the dust fall and was determined to be the primary ecological risk factor in the atmospheric environment in the vicinity of the construction waste dump.
在本研究中，选择中国北京的一个大型建筑废弃物堆作为研究区域。采集了 19 个有效的大气尘样品。采用 ICP-MS 对样品中 14 种金属元素（Ca、Fe、Al、Mg、Mn、Zn、Cr、Cu、V、Pb、Ni、As、Co 和 Cd）的质量分数进行了测定。利用富集因子、地积累指数和潜在生态风险评价方法，对 10 种不同重金属的污染物和潜在生态风险水平进行了评价。结果表明，尘埃中 Ca、Fe、Al 和 Mg 的含量相当高，占所分析金属总量的 98.81%。在建筑废弃物堆附近的尘埃中，Cd 和 Zn 是主要的金属污染物，其次是 Cu 和 Mn。建筑废弃物中的 Cd、Zn、Cu 和 Mn 含量对距离垃圾场 250 米范围内的大气污染有显著影响。此外，Cd 对尘埃中重金属的综合生态风险贡献最大，被确定为建筑废弃物堆附近大气环境中的主要生态风险因素。
