Is the bioavailability index applicable for trace elements in different types of soil?
文献类型：期刊论文
| 作者 | Zhang, SZ; Shan, XQ |
| 刊名 | CHEMICAL SPECIATION AND BIOAVAILABILITY
 |
| 出版日期 | 2000 |
| 卷号 | 12期号:4页码:117-123 |
| 关键词 | bioavailability index speciation soil trace element |
| 英文摘要 | The bioavailability index (BI) is defined as the proportion of reduction in a plant's accumulation of an element, caused by the removal of the extractable fraction of the element of interest from the soil. The BI and corresponding experimental methods were quantitatively applied to evaluate the bioavailability of trace elements in five Chinese soils. The soil was first extracted with various reagents (DTPA, HCl and NH2OH.HCl) separately, to remove the extractable elements. The soil, after extraction, was washed with deionised water to eliminate the extractant used in the fractionation analysis. Then the pH of the soil was re-adjusted with CaO. The soil was then fertilised and incubated in a greenhouse for four weeks. Tests showed that after incubation the pH, cation exchange capacity (CEC) and organic matter (OM) of the treated soil were close to their original values. Wheat (Triticum aestivum L.) was planted in both the untreated and treated soil for eight weeks. After harvest the plant concentrations of the elements Cr, Mn, Co, Ni, Zn, Cu, Cd, and Pb were analysed by inductively coupled plasma mass spectrometry (ICPMS). Trace element accumulation by plants grown in the treated soil was reduced significantly compared with that of plants grown in the untreated soil. The results showed that BI values were in the order BI(DTPA)>BI(HCl)>BI(NH2OH.HCl). This indicated that the DTPA-extractable fraction represented a highly available fraction of the total content. Variations of BI among different trace elements show that Cr, Mn, Zn and Co have a higher BI, in general for the elements tested, whereas, Cu, Cd and Pb have lower values. There are also slight differences in the BI among soils. However, no significant relationship could be found between the BI and the soil characteristics. |
| WOS记录号 | WOS:000169934700001 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/24149]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Zhang, SZ,Shan, XQ. Is the bioavailability index applicable for trace elements in different types of soil?[J]. CHEMICAL SPECIATION AND BIOAVAILABILITY,2000,12(4):117-123. |
| APA | Zhang, SZ,&Shan, XQ.(2000).Is the bioavailability index applicable for trace elements in different types of soil?.CHEMICAL SPECIATION AND BIOAVAILABILITY,12(4),117-123. |
| MLA | Zhang, SZ,et al."Is the bioavailability index applicable for trace elements in different types of soil?".CHEMICAL SPECIATION AND BIOAVAILABILITY 12.4(2000):117-123. |
入库方式： OAI收割
来源：生态环境研究中心
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