Characteristics and provenance of hazardous trace elements in soil from a typical agricultural region in eastern Anhui,
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Geosciences Journal
GJ
Characteristics and provenance of hazardous trace elements in soil from a typical agricultural region in eastern Anhui, China Lu Wei1,2,3, Guijian Liu1,3, and Dun Wu1,4* 1
Key Laboratory of Crust Mande Materials and Environment, Chinese Academy of Sciences, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China 2 Geo-Environment Monitoring Institute of Anhui Province, Hefei, Anhui 230001, China 3 State Key Laboratory of Loess and Quaternary of Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xian, Shaanxi 710075, China 4 Exploration Research Institute, Anhui Provincial Bureau of Coal Geology, Hefei, Anhui 23008, China
ABSTRACT: With the purpose of investigate the characteristics and provenances of the hazardous trace elements (HTEs) in a typical agricultural land in the undulating plain area of eastern Anhui province, China, a total of 1170 soil samples were collected. Six HTEs, including Cd, Cr, Hg, Ni, Pb, and As, were determined. Statistical methods including box plot, Pearson correlation analysis, principal component analysis, and cluster analysis, were conducted to illustrate the provenances of HTEs. Results indicate that Cd and Hg were influenced by human activities (such as traffic transportation for Cd and Pb, and chemical pesticides for Hg). Cr, Ni, and As mainly originated from the parent materials (e.g., red detrital rocks, carbonate rocks, and late Pleistocene loess). Pb is of dual provenances of both human activity and parent material. In a word, regarding highly toxic HTEs, the soil in the study area is almost free from pollution, and only a small amount of soil samples contains slightly higher contents of As, Cd and Pb. Key words: hazardous trace elements, distribution, provenance, agricultural soil Manuscript received June 1, 2019; Manuscript accepted September 27, 2019
1. INTRODUCTION With a rapid development of urbanization, industrialization, and intensive agriculture in China, the increased hazardous trace elements (HTEs) pollutants might enter the agricultural soil via various ways, such as fertilizer, pesticide, wet and dry precipitation of pollutants from industry, and transportation. Compared with the soil covered with basalt, the concentration of highly toxic HTEs in Thailand paddy soil from sand alluvial layer and scouring sediment is lower (Inboonchuay et al., 2016). The Cd in the Dongtang soil of Guangdong Province in China was ascribed to *Corresponding author: Dun Wu Key Laboratory of Crust Mande Materials and Environment, Chinese Academy of Sciences, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China Tel: +86-551-63603714, Fax: +86-551-23-63603714, E-mail: [email protected]
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the atmospheric Cd from the Danxia and Fankou metallurgical plants (Wang et al., 2018). The soils from coal-mining area reclaimed by coal gangue were slightly enriched in Cu, Pb, and Zn r
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