TY - JOUR
T1 - Treatment of hydrochloric acid with magnesium-aluminum oxide at ambient temperatures
AU - Kameda, Tomohito
AU - Yoshioka, Toshiaki
AU - Hoshi, Tatsunosuke
AU - Uchida, Miho
AU - Okuwaki, Akitsugu
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2006/10
Y1 - 2006/10
N2 - Our results demonstrate that magnesium-aluminum oxide (Mg-Al oxide) can be advantageous in treating hydrochloric acid waste at temperatures between 10 and 30 °C, by acting as both a neutralizer and fixative for Cl-. The Mg-Al oxide was prepared by the thermal decomposition of a hydrotalcite-like compound. The extent of Cl- removal by Mg-Al oxide increased with increases of temperature, oxide quantity and Mg/Al molar ratio. The initial pH had little effect on Cl- removal; the pH increased rapidly from the start of the reaction and attained a nearly constant value. The reaction involved in Cl- removal from HCl by Mg-Al oxide proceeded under surface chemical reaction control, with apparent activation energy of 65.6 kJ mol-1.
AB - Our results demonstrate that magnesium-aluminum oxide (Mg-Al oxide) can be advantageous in treating hydrochloric acid waste at temperatures between 10 and 30 °C, by acting as both a neutralizer and fixative for Cl-. The Mg-Al oxide was prepared by the thermal decomposition of a hydrotalcite-like compound. The extent of Cl- removal by Mg-Al oxide increased with increases of temperature, oxide quantity and Mg/Al molar ratio. The initial pH had little effect on Cl- removal; the pH increased rapidly from the start of the reaction and attained a nearly constant value. The reaction involved in Cl- removal from HCl by Mg-Al oxide proceeded under surface chemical reaction control, with apparent activation energy of 65.6 kJ mol-1.
KW - Hydrochloric acid
KW - Hydrotalcite-like compound
KW - Magnesium-aluminum oxide
KW - Neutralization
KW - Ordinary temperature
KW - Removal of chloride
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U2 - 10.1016/j.seppur.2006.02.008
DO - 10.1016/j.seppur.2006.02.008
M3 - Article
AN - SCOPUS:33749074957
VL - 51
SP - 272
EP - 276
JO - Separation and Purification Technology
JF - Separation and Purification Technology
SN - 1383-5866
IS - 3
ER -