Thallium at the interface of soil and green cabbage (Brassica oleracea L. var. capitata L.): Soil-plant transfer and influencing factors

	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 期号:1 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 oleracea L 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, approximate to 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.
学科领域	环境地球化学
收录类别	SCI
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/5082
专题	环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文
推荐引用方式 GB/T 7714	Yanlong Jia,Tangfu Xiao,Guangzhu Zhou,et al. 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(1):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(1),140-147.
MLA	Yanlong Jia,et al."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 450.1(2013):140-147.

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