Assessment of heavy metal contamination and bioaccumulation in soybean plants from mining and smelting areas of southern Hunan Province, China

Hang Zhou; Min Zeng; Xin Zhou; Bo-Han Liao; Jun Liu; Ming Lei; Qian-Yun Zhong; Hui Zeng

doi:10.1002/etc.2389

journal article Sep 05, 2013

Assessment of heavy metal contamination and bioaccumulation in soybean plants from mining and smelting areas of southern Hunan Province, China

Hang Zhou

Min Zeng

Xin Zhou

Bo-Han Liao Jun Liu

Ming Lei

Qian-Yun Zhong Hui Zeng

Environmental Toxicology and Chemistry Vol. 32 No. 12 pp. 2719-2727 · Oxford University Press (OUP)

View at Publisher Save 10.1002/etc.2389

Abstract

Abstract

Soybean is one of most important dicotyledonous food crops and is widely planted in Hunan Province, China. However, mining activity causes contamination of the soil in which soybean grows. To assess the impact of mining-induced soil contamination on soybean plants, a geoaccumulation index (Igeo) was used to evaluate 20 soil samples from the mining and smelting areas of southern Hunan Province. The results indicated that Zn ranged from uncontaminated to a moderately contaminated level (Igeo &lt; 1), Pb was at a strongly contaminated level (Igeo &gt; 3), and Cd was at an extremely contaminated level (Igeo &gt; 5) across the whole study area. All of the studied soybean plants were affected by heavy metal Pb and Cd contamination, and the mean concentrations in seeds were 13.9 mg/kg and 2.95 mg/kg, respectively. The estimated bioconcentration factor and translocation factor showed that the soybean roots had a strong Cd bioconcentration capability and the stems had a strong translocation capability in terms of Pb, Cd, and Zn, with preferential transference of metals to the soybean leaves. The bioavailable fraction in the soil was characterized by the exchangeable fraction of heavy metals. In the present study, the bioavailable fractions of Pb, Cd, and Zn were significantly positively correlated with the concentration of these metals in soybean tissues (roots, stems, leaves, husks, and seeds). Environ Toxicol Chem 2013;32:2719–2727. © 2013 SETAC

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Details

Published: Sep 05, 2013
Vol/Issue: 32(12)
Pages: 2719-2727
License: View

Authors

H

Hang Zhou

Institute of Environment Science and EngineeringCentral South University of Forestry and Technology, , Changsha , China; College of Bioscience and TechnologyHunan Agricultural University, , Changsha , China

M

Min Zeng