Removal of Perchlorate from Contaminated Water Using a Regenerable Polymeric Ligand Exchanger

Autor:	Dongye Zhao, Arthur D. Kney, Zhong Xiong, Paul S. Dimick, Javad Tavakoli
Rok vydání:	2006
Předmět:	Ethanol Ion exchange Ligand Process Chemistry and Technology General Chemical Engineering Inorganic chemistry Filtration and Separation Sorption General Chemistry Contaminated water Perchlorate chemistry.chemical_compound Pulmonary surfactant chemistry Stoichiometry
Zdroj:	Separation Science and Technology. 41:2555-2574
ISSN:	1520-5754 0149-6395
DOI:	10.1080/01496390600778538
Popis:	A polymeric ligand exchanger (PLE), DOW 3 N‐Cu, has been investigated for perchlorate (ClO4 −) removal from contaminated water. Batch kinetic tests revealed that the perchlorate sorption equilibrium for DOW 3 N‐Cu can be reached within 20 hours and perchlorate removal by DOW 3 N‐Cu follows standard ion exchange stoichiometry. Fixed‐bed column runs showed that 12,388 bed volumes of perchlorate‐free water can be obtained when DOW 3 N‐Cu was used to treat a simulated contaminated water with an influent perchlorate concentration of 200 µg/L. It was found that the regeneration of spent DOW 3 N‐Cu is pH dependent. It was shown that addition of ethanol and a surfactant Tween 80 to a 4% NaCl/2% NaOH regenerant solution increased the regeneration efficiency of spent DOW 3 N‐Cu by 11 and 5 percent, respectively. Nearly 90% of perchlorate capacity of saturated DOW 3 N‐Cu was recovered using 35 bed volumes of a regenerant containing 4% (w/w) NaCl, 2% NaOH, 5% Tween 80, and 5% ethanol.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::dd2d617e4441f90b29c3f5c6c6a0fe8e https://doi.org/10.1080/01496390600778538 Zobrazit plný text záznamu