Spatial distribution and ecological risk assessment of heavy metals in karst soils from the Yinjiang County, Southwest China
Background Soil heavy metals (HMs) under different land-use types have diverse effects, which may trigger the ecological risk. To explore the potential sources of HMs in karst soils, the spatial distribution and geochemical behavior of HMs based on different land-use types are employed in this study...
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PeerJ Inc.
2022-02-01
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| Online Access: | https://peerj.com/articles/12716.pdf |
| _version_ | 1797420876582354944 |
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| author | Ruiyin Han Zhifang Xu |
| author_facet | Ruiyin Han Zhifang Xu |
| author_sort | Ruiyin Han |
| collection | DOAJ |
| description | Background Soil heavy metals (HMs) under different land-use types have diverse effects, which may trigger the ecological risk. To explore the potential sources of HMs in karst soils, the spatial distribution and geochemical behavior of HMs based on different land-use types are employed in this study. Methods Soil samples (n = 47) were collected in three suites of karst soil profiles from the secondary forest, abandoned cropland and shrubland in Yinjiang, Southwest China. The concentrations of Ni, Mn, Cr, Pb, Cd and Mo were determined to give a comprehensive understanding of the possible sources of these HMs and evaluate the potential ecological risk in Yinjiang County. Results The mean concentrations of HMs in all profiles followed the same order: Mn > Cr > Ni > Pb > Mo > Cd. Meanwhile, the concentrations of most HMs roughly increased with the depth. Additionally, the concentrations of HMs were mostly correlated with soil pH and SOC, rather than with clay and silt proportions. By contrast, with the enrichment factors (EF), geo-accumulation (Igeo) and potential ecological risk index (PERI) of HMs in soil under different land-use types, the results indicated that these HMs exhibited non-pollution (Igeo < 0) and no ecological risk (PERI < 30) to human health in soils of Yinjiang County. Conclusions The distribution of HMs is dominated by weathering in the karst area, and the effects of agricultural inputs on the enrichment of soil HMs in Yinjiang County are limited. This further state that the arrangement of the local agricultural structure is reasonable. |
| first_indexed | 2024-03-09T07:08:55Z |
| format | Article |
| id | doaj.art-fafd2e8f72324f2e9ad98189db44971e |
| institution | Directory Open Access Journal |
| issn | 2167-8359 |
| language | English |
| last_indexed | 2024-03-09T07:08:55Z |
| publishDate | 2022-02-01 |
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| spelling | doaj.art-fafd2e8f72324f2e9ad98189db44971e2023-12-03T09:19:45ZengPeerJ Inc.PeerJ2167-83592022-02-0110e1271610.7717/peerj.12716Spatial distribution and ecological risk assessment of heavy metals in karst soils from the Yinjiang County, Southwest ChinaRuiyin Han0Zhifang Xu1Institute of Geology and Geophysics, Chinese Academy of Sciences (CAS), Beijing, ChinaInstitute of Geology and Geophysics, Chinese Academy of Sciences (CAS), Beijing, ChinaBackground Soil heavy metals (HMs) under different land-use types have diverse effects, which may trigger the ecological risk. To explore the potential sources of HMs in karst soils, the spatial distribution and geochemical behavior of HMs based on different land-use types are employed in this study. Methods Soil samples (n = 47) were collected in three suites of karst soil profiles from the secondary forest, abandoned cropland and shrubland in Yinjiang, Southwest China. The concentrations of Ni, Mn, Cr, Pb, Cd and Mo were determined to give a comprehensive understanding of the possible sources of these HMs and evaluate the potential ecological risk in Yinjiang County. Results The mean concentrations of HMs in all profiles followed the same order: Mn > Cr > Ni > Pb > Mo > Cd. Meanwhile, the concentrations of most HMs roughly increased with the depth. Additionally, the concentrations of HMs were mostly correlated with soil pH and SOC, rather than with clay and silt proportions. By contrast, with the enrichment factors (EF), geo-accumulation (Igeo) and potential ecological risk index (PERI) of HMs in soil under different land-use types, the results indicated that these HMs exhibited non-pollution (Igeo < 0) and no ecological risk (PERI < 30) to human health in soils of Yinjiang County. Conclusions The distribution of HMs is dominated by weathering in the karst area, and the effects of agricultural inputs on the enrichment of soil HMs in Yinjiang County are limited. This further state that the arrangement of the local agricultural structure is reasonable.https://peerj.com/articles/12716.pdfContamination assessmentDistribution characteristicsLand-use typesKarst areaSoil heavy metals |
| spellingShingle | Ruiyin Han Zhifang Xu Spatial distribution and ecological risk assessment of heavy metals in karst soils from the Yinjiang County, Southwest China PeerJ Contamination assessment Distribution characteristics Land-use types Karst area Soil heavy metals |
| title | Spatial distribution and ecological risk assessment of heavy metals in karst soils from the Yinjiang County, Southwest China |
| title_full | Spatial distribution and ecological risk assessment of heavy metals in karst soils from the Yinjiang County, Southwest China |
| title_fullStr | Spatial distribution and ecological risk assessment of heavy metals in karst soils from the Yinjiang County, Southwest China |
| title_full_unstemmed | Spatial distribution and ecological risk assessment of heavy metals in karst soils from the Yinjiang County, Southwest China |
| title_short | Spatial distribution and ecological risk assessment of heavy metals in karst soils from the Yinjiang County, Southwest China |
| title_sort | spatial distribution and ecological risk assessment of heavy metals in karst soils from the yinjiang county southwest china |
| topic | Contamination assessment Distribution characteristics Land-use types Karst area Soil heavy metals |
| url | https://peerj.com/articles/12716.pdf |
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