文献类型：期刊文献

英文题名：The evaluation of heavy metal accumulation and application of a comprehensive bio-concentration index for woody species on contaminated sites in Hunan, China

作者：Zhao, Xiulian[1,2] Liu, Jianfeng[1] Xia, Xinli[2] Chu, Jianmin[1] Wei, Yuan[1] Shi, Shengqing[1] Chang, Ermei[1] Yin, Weilun[2] Jiang, Zeping[1]

第一作者：赵秀莲;Zhao, Xiulian

通信作者：Jiang, ZP[1]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, State Forestry Adm, Key Lab Tree Breeding & Cultivat, Beijing 100091, Peoples R China;[2]Beijing Forestry Univ, Coll Biol, Natl Engn Lab Tree Breeding, Beijing 100083, Peoples R China

年份：2014

卷号：21

期号：7

起止页码：5076-5085

外文期刊名：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH

收录：;Scopus(收录号：2-s2.0-84897056292);WOS:【SCI-EXPANDED(收录号:WOS:000333424900027)】；

基金：This work was supported by the Ministry of Science and Technology, China (2011BAD0103 and 2012BAC09B03). The authors are grateful to Dr. Fang-Ping Tong and Zhen-Hua Liu at the Research Institute of Forestry, Hunan Academy of Forestry, China, for their continuous support during the experiment.

语种：英文

外文关键词：Heavy metal pollution; Woody plants; Phytoextraction; Fuzzy synthetic evaluation; Comprehensive bio-concentration index

摘要：Fast-growing metal-accumulating woody plants are considered potential candidates for phytoextraction of metals. Shuikoushan mining, one of the biggest Pb and Zn production bases in China, presents an important source of the pollution of environment during the last 100 years. Over 150 km(2) of fertile soil have been contaminated by the dust, slag, and tailings from this mining. The goal of the present work has been to determine the content of Pb, Zn, Cd, and Cu in wild woody plants (18 species) naturally growing in this area. Two hundred five plant and soil samples from 11 contaminated sites were collected and analyzed. In addition, to assess the ability of multi-metal accumulation of these trees, we proposed a predictive comprehensive bio-concentration index (CBCI) based on fuzzy synthetic assessment. Our data suggest some adult trees could also accumulate a large amount of metals. Pb concentrations in leaves of Paulownia fortunei (Seem.) Hemsl. (1,179 mg/kg) exceeded the hyperaccumulation threshold (1,000 mg/kg). Elevated Pb concentrations (973.38 mg/kg) were also found in the leaves of Broussonetia papyrifera (L.) Vent., with a Pb bio-concentration factor of up to 0.701. Endemic species, Zenia insignis Chun exhibited huge potential for Zn and Cd phytoextraction, with the highest concentrations of Zn (1,968 mg/kg) and Cd (44.40 mg/kg), characteristic root nodules, and fast growth rates in poor soils. As for multi-metal accumulation ability, native species B. papyrifera was calculated to have the most exceptional ability to accumulate various metals simultaneously (CBCI 2.93), followed by Amorpha fruticosa L. (CBCI 2.72) and Lagerstroemia indica L. (CBCI 2.53). A trend of increasing metal from trunks to leaves (trunks < branches < leaves) and towards fine roots has been shown by metal partitioning between tissues. The proposed CBCI would allow for the selection of suitable trees for phytoremediation in the future.