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Thallium at the interface of soil and green cabbage (Brassica oleracea L. var. capitata L.): Soil–plant transfer and influencing factors
Yanlong Jia;  Tangfu Xiao;  Guangzhu Zhou;  Zengping Ning
2013
发表期刊Science of The Total Environment
卷号450–451页码:140-147
摘要

Thallium (Tl) is a non-essential and toxic trace metal found in many plants, but it can accumulate at particularly high concentration in green cabbage (Brassica oleraceaL. var. capitata L.). The aim of this study is to explore the transfer and accumulation of Tl at the interface of rhizospheric soil and green cabbage from a long-term Tl contaminated site in southwestern Guizhou Province, China. Influencing factors such as Tl distribution in various soil fractions and physical–chemical characteristics of rhizospheric soil were also investigated. Our results demonstrated that green cabbage had high accumulation of Tl, with most bioconcentration factor (BF) values exceeding 1, and up to a maximum level of 11. The enrichment of Tl in the green cabbage tissues followed a descending order, i.e. old leaves > fresh leaves > stems ≈ roots. The stems functioned as a channel for Tl transportation to the leaves, where most of the Tl (greater than 80%) was found to accumulate. In the rhizospheric soils, 62–95% of Tl existed in the residual fraction, while lower concentrations of Tl (on average, 1.7% of total T1 in rhizospheric soil) were found in the water and acid soluble fractions. The major fraction of labile Tl was located in the reducible fraction (9%). Our results also suggested that the uptake and enrichment of Tl in green cabbage were affected by Tl concentrations, soil water content, soil pH, soil organic material (SOM) and cation exchange capacity (CEC) in rhizospheric soil.

关键词Thallium soil sequential Extraction green Cabbage transfer influencing Factor
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.gyig.ac.cn/handle/42920512-1/9427
专题环境地球化学国家重点实验室
作者单位1.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
2.Graduate University of Chinese Academy of Sciences, Beijing 100039, China
3.School of Chemistry and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590,China
推荐引用方式
GB/T 7714
Yanlong Jia;Tangfu Xiao;Guangzhu Zhou;Zengping Ning. Thallium at the interface of soil and green cabbage (Brassica oleracea L. var. capitata L.): Soil–plant transfer and influencing factors[J]. Science of The Total Environment,2013,450–451:140-147.
APA Yanlong Jia;Tangfu Xiao;Guangzhu Zhou;Zengping Ning.(2013).Thallium at the interface of soil and green cabbage (Brassica oleracea L. var. capitata L.): Soil–plant transfer and influencing factors.Science of The Total Environment,450–451,140-147.
MLA Yanlong Jia;Tangfu Xiao;Guangzhu Zhou;Zengping Ning."Thallium at the interface of soil and green cabbage (Brassica oleracea L. var. capitata L.): Soil–plant transfer and influencing factors".Science of The Total Environment 450–451(2013):140-147.
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