Transfer of cadmium and lead from soil to mangoes in an uncontaminated area, Hainan Island, China
Transfer of cadmium and lead from soil to mangoes in an uncontaminated area, Hainan Island, China
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中国海南岛未污染地区土壤中镉和铅向芒果的转移
DOI：
10.1016/j.geoderma.2009.12.004
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发表时间：
2010-02-15
期刊：
影响因子：
6.1
通讯作者：
Ma, Zhendong
中科院分区：
文献类型：
--
作者：
Bi, Xiangyang;Ren, Limin;Ma, Zhendong
水果中有毒金属的暴露是人类接触土壤污染物的重要途径。但对土壤-果实系统中金属积累的研究较少。本研究对非污染区芒果(芒果L)土壤-土壤系统中Cd、Pb的积累进行了系统的调查研究。结果表明，土壤中Cd和Pb值受母质控制，Cd和Pb值分别为0.019~0.21mU·g(-1)和863mU·g~(-1)，活性态Cd和Pb值分别为0.003~0.059 mU·g~(-1)和0.8~7.0mU·g~(-1)。芒果果实中Cd和Pb值分别为0.3~4.2和0.8~209 ng g(-1)(M)，品种间差异较大。土壤中重金属向果实的转移因子(Tf)在品种间差异显著，Cd为0.01%~0.025，Ph为0.001~0.0019。方差分析和相关分析表明，果实中金属含量的变化取决于品种的差异，而品种内金属含量的变化在一定程度上受土壤金属水平的控制。我们的发现表明，使用单个品种来评估土壤中金属的生物有效性或金属从土壤到植物的转移能力可能比使用不同的品种更准确。用石墨炉火焰原子吸收光谱仪进行了定量化学分析。(C)2009爱思唯尔B.V.保留所有权利。
Exposure to toxic metals from fruits is an important pathway of human exposure to soil pollutants. but few researches on metals accumulation in the soil-fruit system were performed. In this study, we conducted a systemic survey of Cd and Pb accumulations in the soil-mango (Mangifera indica L) system from an uncontaminated area, Hainan Island, China. Results indicated that concentrations of Cd and Pb in the soil were controlled by the parent materials, with concentrations ranging from 0.019-0.21 mu g g(-1) for Cd and 863 mu g g(-1) for Pb in total and from 0.003-0.059 mu g g(-1) for Cd and 0.8-7.0 mu g g(-1) for Pb in labile fractions, respectively. The concentrations of Cd and Pb in the mango fruits showed ranges of 0.3-4.2 and 0.8-209 ng g(-1) (M), respectively, which varied significantly between cultivars. The transfer factors (TFs) of metals from soil to fruit showed significant differences between cultivars, from 0.01 to 0.025 for Cd and from 0.001 to 0.0019 for Pb. The ANOVA and correlation analyses indicated that the variations of metal in the fruit depended on the difference Of cultivars, while the variations of metal concentrations within cultivar were controlled, to some extent, by the soil metal levels. Our finding suggests that the use of the individual cultivar to assess the soil metal bioavailability or metal transfer ability from soil to plant may be more precise than the use of different cultivars. Quantitative chemical analysis was performed using flame OF graphite furnace atomic absorption spectroscopy. (C) 2009 Elsevier B.V. All rights reserved.