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| Environmental capacity assessment of heavy metals in farmland soils in the Ebinur Lake basin of Xinjiang |
| Received:December 05, 2024 |
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| KeyWord:farmland;soil;heavy metal;environmental capacity;Ebinur Lake basin |
| Author Name | Affiliation | E-mail | | ZHANG Zixuan | College of Geographical Science and Tourism, Xinjiang Normal University, Urumqi 830054, China | | | MAMATTURSUZ Eziz | College of Geographical Science and Tourism, Xinjiang Normal University, Urumqi 830054, China
Xinjiang Laboratory of Lake Environment and Resources in Arid Zone, Xinjiang Normal University, Urumqi 830054, China | oasiseco@xjnu.edu.cn | | WANG Liling | College of Geographical Science and Tourism, Xinjiang Normal University, Urumqi 830054, China | | | CHEN Mingli | College of Geographical Science and Tourism, Xinjiang Normal University, Urumqi 830054, China | |
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| Abstract: |
| To clarify the environmental capacity of heavy metals in farmland soils in the Ebinur Lake basin of Xinjiang, a total of 115 surface soil samples were collected from the study area, and the contents of heavy metals including Cd, Hg, As, Pb, Cu, Ni, and Zn were analyzed. The Environmental Capacity Comprehensive Index（PI）was used to analyze the characteristics and spatial distribution patterns of environmental capacity of heavy metals in farmland soils. The results showed that the average content of seven heavy metals, including Cd, Hg, As, Pb, Cu, Ni, and Zn, in the farmland soil in the Ebinur Lake basin was lower than the allowable limits in the Soil Environmental Quality-Risk Control Standards for Soil Contamination of Agricultural Land（GB 15618—2018）, and the overall content of heavy metals was within a safe range. The average static and dynamic annual environmental capacities of various heavy metals in farmland soil in the study area can be ranked as：Zn>Ni>Pb>Cu>As>Hg>Cd. The average dynamic annual environmental capacity of various heavy metals was greater than the static annual environmental capacity. The single environmental capacity index（Pi）of seven heavy metals in farmland soils can be ranked as：Cu>Hg>Ni=Pb>Cd>Zn>As. The average PI value of heavy metals in farmland soil was 0.82, at a medium capacity zone. The spatial distribution patterns of Pi of various heavy metals are different. The low PI areas distributed in the northern part of Wenquan County, and the southwestern and northern parts of Jinghe County. Overall, the soil As content is the main factor affecting the environmental capacity of heavy metals in farmland soils in the Ebinur Lake basin. |
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