首页|期刊导航|中国地球化学学报（英文版）|Selection of better extractants to indicate Pb bioavailability in lead-contaminated agricultural soils of Zhejiang Province
中国地球化学学报（英文版）2007，Vol.26Issue(4)：407-413,7.
Selection of better extractants to indicate Pb bioavailability in lead-contaminated agricultural soils of Zhejiang Province
Selection of better extractants to indicate Pb bioavailability in lead-contaminated agricultural soils of Zhejiang Province
摘要
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.关键词
bioavailability/ Brassica chinensis/ lead contamination/ extractantKey words
bioavailability/ Brassica chinensis/ lead contamination/ extractant分类
天文与地球科学引用本文复制引用
..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（英文版）,2007,26(4):407-413,7.基金项目
Granted jointly by the State Key Basic Research Program (973) of China (No. 2002CB410804) and the National Natural Science Foundation of China (Nos. 40201026 and 40371063). （973）
