School of the Environment, Henan University of Technology, Zhengzhou, Henan, 450001, China.
Department of Soil and Crop Sciences, Colorado State University, Fort Collins, CO, 80523-1170, USA.
Ecotoxicol Environ Saf. 2020 Jul 15;198:110683. doi: 10.1016/j.ecoenv.2020.110683. Epub 2020 Apr 30.
Smelting activities have been shown to increase the likelihood of environmental heavy metal accumulation and bioaccumulation potential within relative proximity to smelter sites. This investigation focused specifically on cadmium (Cd), copper (Cu), lead (Pb) and zinc (Zn) accumulation in 43 wild plant species and corresponding soils near a Pb smelting contaminated area. Soils in the study area had elevated Cd, Cu, Pb and Zn concentrations, with pollution indices ranked as Cd > Pb > Cu > Zn. Aboveground plant heavy metal concentrations ranked Pb > Zn > Cd > Cu, with plants having greater bioconcentration factor (BCF) values for Cd than for Pb, Cu and Zn. Plant Cd BCF averaged 1.42, while Pb, Cu and Zn averaged 0.128, 0.256 and 0.560, respectively. The greatest Cd BCF value was 5.40 for Dendranthema indicum; Cd accumulation for this species has not been reported previously. The greatest shoot Cd concentration (66.5 mg kg) was found in Viola verecunda. Significant correlations existed between plant shoot Cd and Pb concentrations and soil total and DTPA-extractable Cd and Pb. Plant species with greater heavy metal accumulation could potentially be used for phytoextraction in the study area, while those having less accumulation potentially being used to reduce heavy metal flow into the food chain, reducing the health risks associated with elevated heavy metal soil contamination.
冶炼活动已被证明会增加环境重金属在相对接近冶炼场的地方积累和生物蓄积的可能性。本研究专门关注了铅冶炼污染区附近 43 种野生植物和相应土壤中的镉（Cd）、铜（Cu）、铅（Pb）和锌（Zn）积累。研究区域的土壤中 Cd、Cu、Pb 和 Zn 浓度升高，污染指数排序为 Cd > Pb > Cu > Zn。地上植物重金属浓度排序为 Pb > Zn > Cd > Cu，植物对 Cd 的生物浓缩系数（BCF）值大于 Pb、Cu 和 Zn。植物 Cd 的 BCF 平均值为 1.42，而 Pb、Cu 和 Zn 的平均值分别为 0.128、0.256 和 0.560。最大的 Cd BCF 值为 1.42，来自 Dendranthema indicum；该物种的 Cd 积累此前尚未报道过。最大的茎 Cd 浓度（66.5mg/kg）出现在 Viola verecunda 中。植物地上部 Cd 和 Pb 浓度与土壤总 Cd 和 Pb 以及 DTPA 可提取 Cd 和 Pb 之间存在显著相关性。具有较高重金属积累能力的植物物种可能在研究区域中用于植物提取，而积累能力较低的植物物种可能用于减少重金属流入食物链，降低与土壤重金属污染相关的健康风险。
