Design and Evaluation of Chelating Resins through EDTA- and DTPA-Modified Ligands
SEPARATION SCIENCE AND TECHNOLOGY(2015)
摘要
Ion-exchange resins through EDTA or DTPA moieties are synthesized and evaluated for the co-extraction of Cs+ and Sr2+ radionuclides for wastewater treatment. EDTA-bis(amide) and DTPA-bis(amide) derivatives bearing phenol or catechol moieties obtained from tyramine or dopamine, respectively, were used as building blocks to prepare ion-exchange resins. Their synthesis involved the condensation of formaldehyde with various phenolic rings, catechol (C), resorcinol (R), or calixresorcinarene (CR) under alkaline conditions. The resulting formo-phenolic-like resins have both ion-exchange and chelating groups in their structure and are indeed efficient in the remediation of Cs+ and Sr2+, even in salted aqueous solutions.
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关键词
cesium,DTPA,EDTA,co-extraction,strontium,ion-exchange
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