土壤和沉积物中重金属生物可利用性的评估

基金项目:

国家自然科学基金项目资助（20677057）

Evaluation of Bioavailability of Heavy Metals in Soils and Sediments

1.
Guangzhou National Analytical Center
2.
Guangzhou National Analytical Center， School of Environmental Science and Engineering, Sun YatSen University
3.
National Analytical Research Center of Electrochemistry & Spectroscopy, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences
4.
Guangzhou National Analytical Center

摘要: 土壤和沉积物中重金属被植物吸收利用可通过单一化学萃取方法评估。几种重金属生物可利用态的萃取方法被用于土壤和沉积物中重金属的提取。根据实验萃取结果和文献报道，对中性盐、弱酸、螯合剂和联合萃取法进行评价，对影响生物可利用态萃取方法的因素进行讨论，并对土壤和沉积物中重金属生物可利用性评价方法的建立和有效统一使用提出建议。
- 土壤； /
- 沉积物； /
- 重金属； /
- 生物可利用性； /
- 单一萃取
Abstract: The bioavailability of heavy metals (HM) in soils and sediments could be evaluated by single chemical extraction methods. Several single extraction methods were applied to estimate the bioavailable fractions of HM in soil and sediment samples. According to the results from single extraction experiments and reports in references, the extraction performances of single extraction methods for neutral salts, weak acids, chelated reagents and combinable reagents were evaluated respectively. The factors affecting the single extraction methods for bioavailable fraction extraction were also discussed. Some suggestions on establishing and effectively unifying the single extraction methods for bioavailability evaluation of HM were put forward.
- soil /
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- sediment /
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- heavy