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| Pollution characteristics and source analysis of heavy metals in soils surrounding a typical solid waste disposal plant |
| Received:May 07, 2019 |
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| KeyWord:hazardous waste disposal plant;municipal solid waste plant;heavy metal;pollution characteristic;potential ecological risk |
| Author Name | Affiliation | E-mail | | NI Xiao-kun | School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
China National Environmental Monitoring Centre, Beijing 100012, China | | | FENG Xue | China National Environmental Monitoring Centre, Beijing 100012, China | | | YU Yong | China National Environmental Monitoring Centre, Beijing 100012, China | | | JIANG Xiao-xu | China National Environmental Monitoring Centre, Beijing 100012, China | | | LI Zong-chao | China National Environmental Monitoring Centre, Beijing 100012, China | | | LI Yu | School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China | | | XIA Xin | School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
China National Environmental Monitoring Centre, Beijing 100012, China | 1354062546@qq.com |
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| Abstract: |
| In this study, we explored heavy metal pollution characteristics and sources in surface soils surrounding the typical solid waste disposal plant. Two hazardous waste disposal plants and one municipal solid waste plant were selected in this study, and five types of heavy metals (Cd, Hg, As, Pb, Cr)were determined in the soil surrounding them. Single factor pollution index, Nemerow comprehensive pollution index and potential ecological risk index were used to investigate the pollution characteristics. Multivariate statistical analysis was used to investigate the pollution sources in the study area. The results showed that Cd was the primary pollutant in the soil, with 56.25%, 50.00%, and 58.82% of total pollutants for each of the plants. The soil pollution around the hazardous waste disposal plant was more serious than that in the municipal solid waste plant, with Cd, As, and Cr being the obvious pollutants. The results of the multivariate statistical analysis indicated that the sources of heavy metals in different solid waste disposal was plants were different. Cd, Hg, As, and Pb pollutants originated from hazardous waste and disposal, while Cr primarily originated from natural sources. The potential ecological risk assessment showed that risks Cd and Hg were high around the study area, and the contribution of Cd to risk was the highest among the five heavy metals. The Eri of Cd and Hg were 604.26, 1 473.08, 165.13 and 202.99, 441.83, 139.64, of three plants respectively. The hazardous waste disposal plant had high levels of potential ecological risk; therefore, methods to control the effects of hazardous waste disposal plant pollution must be developed. |
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