POLLUTION CHARACTERISTICS AND SOURCE APPORTIONMENT OF HEAVY METALS IN AN ABANDONED IRON ORE AND DOWNSTREAM FARMLAND SOIL

SONG Lusheng; SUN Zhenzhou; HU Jing; DENG Qinghai

doi:10.13205/j.hjgc.202410019

Volume 42 Issue 10

Oct. 2024

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SONG Lusheng, SUN Zhenzhou, HU Jing, DENG Qinghai. POLLUTION CHARACTERISTICS AND SOURCE APPORTIONMENT OF HEAVY METALS IN AN ABANDONED IRON ORE AND DOWNSTREAM FARMLAND SOIL[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(10): 155-164. doi: 10.13205/j.hjgc.202410019

Citation:

SONG Lusheng, SUN Zhenzhou, HU Jing, DENG Qinghai. POLLUTION CHARACTERISTICS AND SOURCE APPORTIONMENT OF HEAVY METALS IN AN ABANDONED IRON ORE AND DOWNSTREAM FARMLAND SOIL[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(10): 155-164. doi: 10.13205/j.hjgc.202410019

Citation:

SONG Lusheng, SUN Zhenzhou, HU Jing, DENG Qinghai. POLLUTION CHARACTERISTICS AND SOURCE APPORTIONMENT OF HEAVY METALS IN AN ABANDONED IRON ORE AND DOWNSTREAM FARMLAND SOIL[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(10): 155-164. doi: 10.13205/j.hjgc.202410019

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POLLUTION CHARACTERISTICS AND SOURCE APPORTIONMENT OF HEAVY METALS IN AN ABANDONED IRON ORE AND DOWNSTREAM FARMLAND SOIL

doi: 10.13205/j.hjgc.202410019

1. Geological Environment Monitoring Institute of Jiangxi Geological Survey and Exploration Institute, Nanchang 330006, China;
2. College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China

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

Abstract

Abstract

Heavymetal contamination in farmland is closely related to food safety and human health. This study investigated the heavy metal pollution in farmland soil near the Wushikeng Iron Mine in Guixi, Jiangxi Province. We collected 52 soil samples from the abandoned mining pits, tailings ponds, and downstream farmlands. We used the geo-accumulation index method and the potential ecological risk assessment method to evaluate the pollution characteristics of heavy metals in the soil. Additionally, the absolute principal component-multiple linear regression model (APCS-MLR) and positive matrix factorization model (PMF) were used to determine the sources of heavy metals detected in the soil. The study results showed that the contents of Cu, Cd, and As in the downstream farmland soil exceeded the screening value of the Soil Environmental Quality-Agricultural Land Soil Pollution Risk Control Standard (Trial) of China. The geo-accumulation index evaluation revealed that Cd was in moderately pollution level, Cu, Ni, and Zn were in slightly pollution level, and As, Hg, and Pb were in pollution-free level. Moreover, the potential ecological risk assessment results indicated that Cd (133.36) posed a strong ecological risk, Hg (54.18) posed a moderate ecological risk, and the other heavy metal elements posed a mild ecological risk. The average comprehensive ecological risk index of the study area was 226.59, indicating a strong potential ecological risk. Both the APCS-MLR and PMF models identified the sources of heavy metals in the soil. The results showed that Pb is mainly from natural sources, Cd and Cu are mainly affected by abandoned iron ore, Zn and Ni are affected by both natural and abandoned iron ore, As is mainly from farms, and Hg is mainly affected by fossil fuel combustion.
- abandoned iron ore,
- potential ecological risk assessment,
- PMF,
- APCS-MLR,
- source analysis

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References(46)

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