POLLUTION ASSESSMENT OF HEAVY METALS IN FARMLAND SOILS AROUND AN ABANDONED SMELTER IN HECHI, CHINA

ZHENG Ying-yi; LIU Jie; JIANG Ping-ping; YOU Shao-hong; ZHOU Shu-lin; YU Guo

doi:10.13205/j.hjgc.202105033

Volume 39 Issue 5

Jan. 2022

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2021 > 39(5): 238-245

ZHENG Ying-yi, LIU Jie, JIANG Ping-ping, YOU Shao-hong, ZHOU Shu-lin, YU Guo. POLLUTION ASSESSMENT OF HEAVY METALS IN FARMLAND SOILS AROUND AN ABANDONED SMELTER IN HECHI, CHINA[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(5): 238-245. doi: 10.13205/j.hjgc.202105033

Citation:

ZHENG Ying-yi, LIU Jie, JIANG Ping-ping, YOU Shao-hong, ZHOU Shu-lin, YU Guo. POLLUTION ASSESSMENT OF HEAVY METALS IN FARMLAND SOILS AROUND AN ABANDONED SMELTER IN HECHI, CHINA[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(5): 238-245. doi: 10.13205/j.hjgc.202105033

Citation:

ZHENG Ying-yi, LIU Jie, JIANG Ping-ping, YOU Shao-hong, ZHOU Shu-lin, YU Guo. POLLUTION ASSESSMENT OF HEAVY METALS IN FARMLAND SOILS AROUND AN ABANDONED SMELTER IN HECHI, CHINA[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(5): 238-245. doi: 10.13205/j.hjgc.202105033

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POLLUTION ASSESSMENT OF HEAVY METALS IN FARMLAND SOILS AROUND AN ABANDONED SMELTER IN HECHI, CHINA

doi: 10.13205/j.hjgc.202105033

1. Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China;
2. Technical Innovation Center of Mine Geological Environmental Restoration Engineering in Southern Karst Area, MNR, Guilin 541004, China;
3. Science and Education Combined with Science and Technology Innovation Base, Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin 541004, China

Received Date: 2020-09-07
Available Online: 2022-01-17

Abstract

Abstract

In order to understand the distribution characteristics and potential risks of heavy metals in farmland soil around an abandoned smelter in Hechi, the pollution status of five heavy metals (Cd, Pb, Cr, Cu, Zn) and main crops in different depths in the region were studied. The soil pollution investigation and ecological risk assessment were carried out by using multivariate statistical analysis, improved Nemerow index method, latent hazard index method and GIS interpolation. The results showed that the average contents of Cd, Pb, Cr, Cu, Zn in soil were higher than the background values of soil environment in Guangxi. The accumulation of Cd and Pb were more obvious, and their contents were 11.5 and 3.3 times higher than the limiting values listed in Soil Environmental Quality Risk Control Standard for Agricultural Land (GB 15618-2018), respectively. The spatial distribution of soil heavy metal content in the study area showed a trend of centered by the adjacent to the smelter, and radiated to the surrounding area. The content of heavy metals in the northwest and southeast of the smelter was higher. According to the analysis of heavy metal content in the soil profile of the study area, only Pb in the surface soil exceeded the screening value of soil pollution risk, the content of Zn, Cr and Cu in different depths of soil was lower than the risk screening value, while the content of Cd in each soil layer exceeded the risk control value of agricultural land, indicating that Cd pollution was serious in this area. Therefore, we should pay more attention to the ecological risk of soil pollution to crops and groundwater. The average contents of Pb, Cd and Cr in corn and sugarcane in the study area were 21.87, 18.48, 7.34 times and 7.97, 3.73 and 6.25 times of the standard limits in the Food Safety National Standard:Contaminants Limits in Food (GB 2762-2017), respectively, with the exceeding rate of 100%.
- smelter,
- heavy metals,
- soils,
- spatial distribution,
- pollution characteristics,
- risk assessment

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References(40)

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