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EXTRACTION OF ADSORBED ARSENIC FROM IAEA-SOIL-5

机译:从IAEA-SOIL-5中提取吸附的砷

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摘要

The following parameters influencing the extraction efficiency of adsorbed arsenic (arsenate) from IAEA-SOIL-5 were investigated: (a) sonication or shaking time and temperature and (b) extractant type (MgCl_2 or NaH_2PO_4 solution), concentration and pH. Sonication of 250 mg material for 1 h at < 30℃ with 10 mL 1 mol L~(-1) phosphate at pH 4.0 yielded a maximum arsenate extraction efficiency of 31.9%. The remainder of the arsenate is probably incorporated in the lattice of minerals and not easily available (exchangeable via ion exchange mechanisms).
机译:研究了以下影响从IAEA-SOIL-5吸附的砷(砷酸盐)提取效率的参数:(a)超声处理或振荡时间和温度,以及(b)提取剂类型(MgCl_2或NaH_2PO_4溶液),浓度和pH。在30°C下用10 mL 1 mol L〜(-1)磷酸盐在pH 4.0下将250 mg物料超声处理1 h,最大砷提取效率为31.9%。其余的砷酸盐可能掺入了矿物质的晶格中,不易获得(可通过离子交换机制交换)。

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