Abstract

Extraction from aqueous solutions of oxalate and ethylenediaminetetraacetate (EDTA) ions, anionic (ASF) and nonionogenic (NSF) surfactants, and a complex of Co(III) with EDTA by the nanofiltration (NF) method was studied. It was shown that 98–99% of NSFs and EDTA, 85–90% of ASFs and oxalate ions, and 76–79% of the Co(III)–EDTA complex can be extracted with the use of a polymeric NF membrane. The possibility is demonstrated of effectively extracting EDTA and oxalate ions with an NF membrane at solution pH varied within the range 1–13 and sodium nitrate concentrations of 0 to 159 g/dm³. A conclusion is made that using the nanofiltration method is promising for effective removal of various organic complexing and surface-active substances and the Co(III)–EDTA complex from solutions with complex salt composition.

中文翻译：

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纳滤法从水溶液中提取有机化合物

摘要

通过纳滤（NF）方法研究了草酸盐和乙二胺四乙酸盐（EDTA）离子，阴离子（ASF）和非离子源（NSF）表面活性剂以及Co（III）与EDTA的配合物的水溶液萃取。结果表明，可以使用聚合物NF膜提取98-99％的NSF和EDTA，85-90％的ASF和草酸根离子以及76-79％的Co（III）-EDTA复合物。在溶液pH范围为1-13和硝酸钠浓度为0至159 g / dm ^3的溶液中，用NF膜有效提取EDTA和草酸根离子的可能性得到证明。得出的结论是，使用纳滤方法有望从具有复杂盐分的溶液中有效去除各种有机络合物和表面活性物质以及Co（III）-EDTA络合物。