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| Selection of better extractants to indicate Pb bioavailability in lead-contaminated agricultural soils of Zhejiang Province | |
| 引用本文： | ZENG Lusheng, LIAO Min CHEN Chengli HUANG Changyong. Selection of better extractants to indicate Pb bioavailability in lead-contaminated agricultural soils of Zhejiang Province[J]. 中国地球化学学报, 2007, 26(4): 407-413. DOI: 10.1007/s11631-007-0407-x |
| 作者姓名： | ZENG Lusheng LIAO Min CHEN Chengli HUANG Changyong |
| 作者单位： | ZENG Lusheng，LIAO Min*，CHEN Chengli，and HUANG Changyong Department of Resources Science，College of Environmental and Resource Sciences，Zhejiang University，Hangzhou 310029，China |
| 基金项目： | 国家重点基础研究发展计划(973计划);国家自然科学基金 |
| 摘 要： | The accumulation of Pb in the food chain is one of the great concerns as it can cause chronic health problems and the available Pb is easily absorbed by crops. To shed light on Pb bioavailability in lead-contaminated agricultural soils of Zhejiang Province, a series of plant growth experiments were performed in a greenhouse to select more suitable extractants from five commonly used extractants (0.1 M HCl, 1 M NH4OAc, 0.1 M CaCl2, DTPA-TEA and Mehlich 3). The results showed that 1 M NH4OAc can extract Pb best, indicating the Pb bioavailability, then, DTPA-TEA and 0.1 M HCl in the tested soils. In case 1 M NH4OAc was used as an extractant, the critical Pb concentrations in soils were 50.19 mg/kg, 21.16 mg/kg and 114.00 mg/kg (1 M NH4OAc extracted Pb) in silty loam, yellowish-red soil and purplish soil, respectively. When the values exceed the above ones, the contents of Pb in Chinese cabbage leaves will exceed the Chinese Tolerance Limit of Lead in Foods (GB14935-94), as a result, potential ecological risk and hazard to human health via the food chain will appear. |
| 关 键 词： | 生物利用率 芸苔 铅 环境污染 萃取剂 |
| 收稿时间： | 2006-03-24 |
| 修稿时间： | 2006-03-24 |
Selection of better extractants to indicate Pb bioavailability in lead-contaminated agricultural soils of Zhejiang Province |
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| Zeng Lusheng,Liao Min,Chen Chengli,Huang Changyong. Selection of better extractants to indicate Pb bioavailability in lead-contaminated agricultural soils of Zhejiang Province[J]. Chinese Journal of Geochemistry, 2007, 26(4): 407-413. DOI: 10.1007/s11631-007-0407-x | |
| Authors: | Zeng Lusheng Liao Min Chen Chengli Huang Changyong |
| Affiliation: | (1) Department of Resources Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310029, China |
| Abstract: | The accumulation of Pb in the food chain is one of the great concerns as it can cause chronic health problems and the available Pb is easily absorbed by crops. To shed light on Pb bioavailability in lead-contaminated agricultural soils of Zhejiang Province, a series of plant growth experiments were performed in a greenhouse to select more suitable extractants from five commonly used extractants (0.1 M HCl, 1 M NH4OAc, 0.1 M CaCl2, DTPA-TEA and Mehlich 3). The results showed that 1 M NH4OAc can extract Pb best, indicating the Pb bioavailability, then, DTPA-TEA and 0.1 M HCl in the tested soils. In case 1 M NH4OAc was used as an extractant, the critical Pb concentrations in soils were 50.19 mg/kg, 21.16 mg/kg and 114.00 mg/kg (1 M NH4OAc extracted Pb) in silty loam, yellowish-red soil and purplish soil, respectively. When the values exceed the above ones, the contents of Pb in Chinese cabbage leaves will exceed the Chinese Tolerance Limit of Lead in Foods (GB14935-94), as a result, potential ecological risk and hazard to human health via the food chain will appear. |
| Keywords: | bioavailability Brassica chinensis lead contamination extractant |
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