Source and path identification of metals pollution in a mining area by PMF and rare earth element patterns in road dust

The Science of the Total Environment
Shuhan TianLingqing Wang

Abstract

To better assess pollution and offer efficient protection for local residents, it is necessary to both conduct an exhaustive investigation into pollution levels and quantify its contributing sources and paths. As it is the biggest light rare earth element (REE) reserve in the world, Bayan Obo deposit releases large amounts of heavy metals into the surrounding environment. In this study, road dust from zones located at different distances to the mining area was collected and sieved using seven sizes. This allowed for subsequent analysis of size-dependent influences of mining activities. A receptor model was used to quantitatively assess mine contributions. REE distribution patterns and other REE parameters were compared with those in airborne particulates and the surrounding soil to analyze pollution paths. Results showed that 27 metals were rated as moderately to extremely polluted (2<geo-accumulation index<6) in both mine processing and residential areas. REEs are the most polluted elements, followed by Mo, Cd, Pb, and Ag. Although mining contribution to pollution levels increased with decreasing distance and size, 35% of REEs and 6% of other polluted metals in residential area road dust originated directly from the mine. The ...Continue Reading

Citations

Jan 21, 2020·Environmental Science and Pollution Research International·Murnira Othman, Mohd Talib Latif
Jul 9, 2020·International Journal of Environmental Research and Public Health·Ting SunZhijian Zheng
Apr 17, 2020·Bulletin of Environmental Contamination and Toxicology·Haibin ChenJunjia Chen
Mar 4, 2021·International Journal of Environmental Research and Public Health·Jie MaYongtao Li
Mar 13, 2021·Environmental Science and Pollution Research International·Abbas TaatiSergi Díez

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