Evaluating the potential health risk of toxic trace elements in vegetables: Accounting for variations in soil factors

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 城市与区域生态国家重点实验室

	Evaluating the potential health risk of toxic trace elements in vegetables: Accounting for variations in soil factors
	Li, Yanling; Yang, Yang; Chen, Weiping; Wang, Meie; Peng, Chi
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2017-04-15
卷号	584 期号:0 页码:942-949
关键词	Site-specific Risk Soil Factors Toxic Trace Element Transfer Model Probability Analysis
英文摘要	Vegetable crop consumption is one of the main sources of dietary exposure to toxic trace elements (TEs). A paired survey of soil and vegetable samples was conducted in 589 agricultural sites in the Youxian prefecture, southern China, to investigate the effect of soil factors on the accumulation of arsenic, cadmium, mercury, and lead in different vegetables. A site-specific model was developed to estimate the health risk from vegetable consumption. The TE concentration varied in different plant species, and rape can be cultivated in contaminated areas for its potential use in restricting the transfer of TE from soil to edible plant parts. The accumulation of TEs in vegetables was governed by multiple factors, mainly element interaction, metal availability (extractable CaCl2 fraction), and soil pH. Soil Zn may promote Cd accumulation in vegetables when soil Cd/Zn ratio > 0.02. Cadmium is a major hazardous component. About 80.8% of the adult populations consuming locally produced vegetables had a daily Cd intake risk above the safe standard. Among investigated vegetables, radish is potentially hazardous for populations because of its high consumption rate and high Cd content but low Zn accumulation. The consumption of radish cultivated in highly acidic soil (4 < pH <= 5) and high Cd contamination (CaCl2-Cd = 1.0 mg kg(-1)) had a significant probability (89.4%) to be above the safe standard; while this risk was significantly decreased to 8.9% in soil of near-neutral pH (6 < pH <= 7). The wide range of TE concentrations and soil factors suggests that a site-specific risk assessment is needed for better and safer vegetable production. (C) 2017 Elsevier B.V. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/39014]
专题	生态环境研究中心_城市与区域生态国家重点实验室
推荐引用方式 GB/T 7714	Li, Yanling,Yang, Yang,Chen, Weiping,et al. Evaluating the potential health risk of toxic trace elements in vegetables: Accounting for variations in soil factors[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2017,584(0):942-949.
APA	Li, Yanling,Yang, Yang,Chen, Weiping,Wang, Meie,&Peng, Chi.(2017).Evaluating the potential health risk of toxic trace elements in vegetables: Accounting for variations in soil factors.SCIENCE OF THE TOTAL ENVIRONMENT,584(0),942-949.
MLA	Li, Yanling,et al."Evaluating the potential health risk of toxic trace elements in vegetables: Accounting for variations in soil factors".SCIENCE OF THE TOTAL ENVIRONMENT 584.0(2017):942-949.