Screening for Autochthonous Phytoextractors in a Heavy Metal Contaminated Coal Mining Area

Kuangjia Li, Zijian Lun, Lin Zhao, Qilong Zhu, Yansheng Gu and Manzhou Li
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Kuangjia Li: School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
Zijian Lun: Henan Anhuan Environmental Sci-Tech Co., Ltd., Anyang 455000, China
Lin Zhao: School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
Qilong Zhu: CNOOC Research Institute, Beijing 100000, China
Yansheng Gu: School of Environmental Studies, China University of Geosciences, Wuhan 430074, China
Manzhou Li: Department of Land and Resources of Henan Province, Zhengzhou 450000, China

IJERPH, 2017, vol. 14, issue 9, 1-14

Abstract: In order to protect public health and crops from soil heavy metal (HM) contamination at a coal mining area in Henan, central China, HM pollution investigation and screening of autochthonous HM phytoextractors were conducted. The concentrations of cadmium (Cd), lead (Pb), copper (Cu) and zinc (Zn) in surface soils exceeded the corresponding local background values and the China National Standard (CNS). The maximum potential ecological risk (RI) was 627.30, indicating very high ecological risk. The monomial risk of Cd contributed the most to the RI, varying from 85.48% to 96.48%. The plant community structure in the study area was simple, and was composed of 24 families, 37 genera and 40 species. B. pilosa , A. roxburghiana , A. argyi , A. hispidus were found to be the most dominant species at considerable risk sites. Based on the comprehensive analysis of Cd concentration, bioconcentration factor, translocation factor and adaptability factor, B. pilosa and A. argyi had potential for phytoextraction at considerable risk sites. A. roxburghiana had potential for Cd phytoextraction at moderately risk sites and A. hispidus seemed suitable for phytostabilization. The results could contribute to the phytoremediation of the similar sites.

Keywords: adaptability factor; gangue dump; heavy metal contamination; native phytoextractor; phytoremediation (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2017
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