SOIL HEAVY METAL POLLUTION CHARACTERISTICS AND HEALTH RISK ASSESSMENT OF A SIMPLE DOMESTIC GARBAGE LANDFILL

LIANG Lichen; YAN Xiaofei; WANG Lili; JIANG Hao; XU Yuanshun

doi:10.13205/j.hjgc.202410021

Volume 42 Issue 10

Oct. 2024

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LIANG Lichen, YAN Xiaofei, WANG Lili, JIANG Hao, XU Yuanshun. SOIL HEAVY METAL POLLUTION CHARACTERISTICS AND HEALTH RISK ASSESSMENT OF A SIMPLE DOMESTIC GARBAGE LANDFILL[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(10): 177-187. doi: 10.13205/j.hjgc.202410021

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LIANG Lichen, YAN Xiaofei, WANG Lili, JIANG Hao, XU Yuanshun. SOIL HEAVY METAL POLLUTION CHARACTERISTICS AND HEALTH RISK ASSESSMENT OF A SIMPLE DOMESTIC GARBAGE LANDFILL[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(10): 177-187. doi: 10.13205/j.hjgc.202410021

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SOIL HEAVY METAL POLLUTION CHARACTERISTICS AND HEALTH RISK ASSESSMENT OF A SIMPLE DOMESTIC GARBAGE LANDFILL

doi: 10.13205/j.hjgc.202410021

Nanjing Institute of Environmental Sciences, MEE, Nanjing 210042, China

Received Date: 2023-09-21
Available Online: 2024-11-30

Abstract

Abstract

To assess the degree of heavy metals pollution and human health risk in undisturbed soil of a simple domestic waste landfill, a small-scale domestic waste landfill in Zhejiang Province was taken as an example, and 54 soil samples were collected from 18 soil sites in the landfill. The contents of Cu, Pb, Cd, Hg, As, and Zn in the soil samples were analyzed. Pollution load index (PLI), ground accumulation index (I_geo), and potential ecological risk index (RI) were comprehensively used to investigate the characteristics of heavy metals pollution. The health risk assessment of heavy metals in adults was carried out by the USEPA health risk assessment model. The results showed that the overall pollution degree of 6 heavy metals in 18 soil sites was mainly in a non-polluting and light pollution level, and the main indicators of pollution accumulation and potential risk were Cd, As, Cu, and Hg. However, attention should be paid to the middle and lower soil layers, because they are more seriously polluted than the surface layer, and a few have high and extremely high ecological risks. Oral intake is the main exposure pathway for carcinogenic risk. 95% of the values of As and Cd showed significant carcinogenic risk; the noncarcinogenic index and total hazard index of adults under the three exposure routes were less than 1, so there was no risk. The research results can provide data reference for the follow-up treatment of simple domestic waste landfills. Whether the site is closed for control, excavation screening, utilization, or relocation, it can provide data support for the ecological restoration of soil pollution at the original site, and provide a scientific basis for risk control and restoration.
- simple landfill,
- heavy metals,
- pollution degree,
- ecological risk,
- human health risk assessment

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References(51)

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