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Spatial distribution and controlling factors of heavy metals in soils from Puding Karst Critical Zone Observatory, southwest China
Zhang, Qian1,2; Han, Guilin1; Liu, Man1; Liang, Tao2
2019-05-01
Source PublicationENVIRONMENTAL EARTH SCIENCES
ISSN1866-6280
Volume78Issue:9Pages:13
Corresponding AuthorHan, Guilin(hanguilin@cugb.edu.cn)
AbstractSoil profile samples under different land-use types were collected at the Puding Karst Critical Zone Observatory to investigate the composition, distribution and controlling factors of heavy metals. The heavy metal contents of Cr, Mn, Fe, Ni, Cu, Zn, Cd and Pb were determined, and their relationships to soil properties were examined. The Mn, Zn, Cd and Pb contents were larger in the topsoil than the deeper layer in all land use. In secondary forest land, the Cr, Fe, Ni and Cu contents in the topsoil were lower than in the deeper layer; however, all eight heavy metal contents were enriched in the topsoil under cropland. The results showed soil organic carbon played a fundamental role in controlling of Cd, while it showed negative relationship with Cr, Fe, Ni and Cu. Soil pH was positively associated with Ni and Cu. The Cr, Fe, Ni and Cu contents were significantly correlated to proportion of micro-aggregates, while the Cd and Pb contents showed a positive correlation with proportion of macro-aggregates. According to principal component analysis, the Cr, Fe, Ni and Cu contents might be affected by soil organic matter; however, the Mn, Zn and Pb contents might be influenced by atmospheric heavy metal deposition, and the Cd content might be controlled by both organic matter and atmospheric deposition. The geoaccumulation index and enrichment factor were calculated to assess the pollution level of soils, and the results showed that most of the selected heavy metals in soils may not be present at sufficient levels for contamination, and Mn and Fe were not from a pollution source and might come from natural weathering processes. This research will help researchers make strategic decisions about food security in the choice of agricultural land.
KeywordSoil heavy metals Land use Limestone soils Geoaccumulation index Enrichment factor
DOI10.1007/s12665-019-8280-6
WOS KeywordORGANIC-MATTER ; TRACE-METAL ; FLY-ASH ; ACCUMULATION ; IRON ; PB ; CD ; ESTUARINE ; CATCHMENT ; MANGANESE
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41325010] ; National Natural Science Foundation of China[41661144029]
Funding OrganizationNational Natural Science Foundation of China
WOS Research AreaEnvironmental Sciences & Ecology ; Geology ; Water Resources
WOS SubjectEnvironmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
WOS IDWOS:000466317400001
PublisherSPRINGER
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Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/68591
Collection中国科学院地理科学与资源研究所
Corresponding AuthorHan, Guilin
Affiliation1.China Univ Geosci Beijing, Sch Water Resources & Environm, Beijing 100083, Peoples R China
2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Qian,Han, Guilin,Liu, Man,et al. Spatial distribution and controlling factors of heavy metals in soils from Puding Karst Critical Zone Observatory, southwest China[J]. ENVIRONMENTAL EARTH SCIENCES,2019,78(9):13.
APA Zhang, Qian,Han, Guilin,Liu, Man,&Liang, Tao.(2019).Spatial distribution and controlling factors of heavy metals in soils from Puding Karst Critical Zone Observatory, southwest China.ENVIRONMENTAL EARTH SCIENCES,78(9),13.
MLA Zhang, Qian,et al."Spatial distribution and controlling factors of heavy metals in soils from Puding Karst Critical Zone Observatory, southwest China".ENVIRONMENTAL EARTH SCIENCES 78.9(2019):13.
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