几种萃取剂对土壤中重金属生物有效部分的萃取效果
Comparing several extractants for extracting bioavailable part of heavy metals in soils
查看参考文献14篇
文摘
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采用6种萃取剂:pH=7的0.01 mol/L CaCl_2、pH=7.3的0.005 mol/L DTPA+0.1 mol/L TEA(三乙醇胺)+0.01 mol/L CaCl_2、0.1 mol/L NaNO_3、0.43 mol/L HOAc、pH=7的0.05 mol/L EDTA和pH=4.65的0.5 mol/L NH_4OAc+0.02 mol/L EDTA浸取液,对污染土壤中的重金属Cu、Zn、Cd、Pb、的进行了萃取,并比较了萃取剂的萃取能力。实验结果表明,HOAc、EDTA以及NH_4OAc-EDTA萃取各种重金属的能力远远大于其它几种萃取剂的萃取能力,是比较理想的萃取剂。 |
其他语种文摘
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Heavy metals were extracted with six selected solutions and the extraction results were compared. The six solutions were: 0.01 mol/L CaCl_2 (pH=7), 0.005 mol/L DTPA+0.1 mol/L TEA+0.01 mol/L CaCl_2 (pH=7.3), 0.1 mol/L NaNO_3, 0.43 mol/L HOAc, pH=7 0.05 mol/L EDTA (pH=7) and 0.5 mol/L NH4OAc+0.02 mol/L EDTA (pH=4.65). It was showed that the extraction results of HOAc, EDTA and NH4OAc-EDTA were much better than other extractants, and they were suitable to extract the bio-effective parts of heavy metals in soils. |
来源
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土壤与环境
,2002,11(3):245-247 【扩展库】
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关键词
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重金属
;
化学萃取法
;
生物有效性
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地址
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1.
中国科学院地球化学研究所, 环境地球化学国家重点实验室, 贵州, 贵阳, 550002
2.
华南理工大学化工学院, 广东, 广州, 510641
3.
华东理工大学环境工程系, 上海, 200237
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语种
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中文 |
文献类型
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研究性论文 |
ISSN
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1008-181X |
学科
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环境科学基础理论 |
基金
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国家自然科学基金
;
广东省环保局项目
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文献收藏号
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CSCD:1143564
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