Premium
Regeneration of anion‐exchange resins with Mg/Al double‐metal hydroxides
Author(s) -
Wang Ying,
Li YanSheng,
Li Zhun
Publication year - 2016
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.42928
Subject(s) - thermogravimetry , layered double hydroxides , ion exchange , calcination , nuclear chemistry , metal , hydrotalcite , differential thermal analysis , yield (engineering) , chemistry , materials science , scanning electron microscope , inorganic chemistry , chemical engineering , ion , metallurgy , organic chemistry , diffraction , composite material , catalysis , physics , optics , hydroxide , engineering
ABSTRACT Anion‐exchange resins (AERs) were regenerated with Mg/Al double‐metal hydroxides as the regenerant. Electrical conductivity breakthrough curves were adopted to estimate the relatively rapid regenerative effect of the AERs. The results show that the optimal regenerative effect of AER was obtained when the Mg/Al molar ratio was 3 and the dosages of Mg and Al hydroxides were 0.045 and 0.015 mol, respectively. The highest effluent water yield was obtained at an AER/cation‐exchange resin volume ratio of 2:1. Characterization through scanning electron microscopy, X‐ray diffraction, and thermogravimetry–differential thermal analysis showed that the regenerant was transformed and exhibited the distinguishing features of Mg/Al layered double hydrotalcites. Cycle experimentation showed that all calcined products effectively regenerated the fouled resins, and the regenerative mechanism was then established. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 42928.