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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.119  No.1388 (April) (2011)  >  pp.277-281

Journal of the Ceramic Society of Japan
<<Previous article Vol.119  No.1388 (April) (2011)   pp.277 - 281 Next article>>

Continuous-flow detoxification treatment of boron-containing wastewater under hydrothermal conditions

Ryo SASAI1), Yukitaka MATSUMOTO1) and Takeshi ITAKURA2)
1) Department of Applied Chemistry, Graduate School of Engineering, Nagoya University
2) EcoTopia Science Institute, Nagoya University


  To develop a practical method of treating boron-containing wastewater, we custom designed two laboratory-scale continuous-flow-type hydrothermal mineralization apparatuses. We carried out a hydrothermal treatment using a continuous-flow apparatus, using Ca(OH)2, CaCl2, and both Ca(OH)2 and CaCl2 as mineralizers, under various pH conditions. Our results show that using CaCl2 under optimal pH conditions (pH = approximately 12) allowed for the stable removal of boron from wastewater. One of the precipitates obtained in this process was parasibirskite, which is a natural boron mineral. Finally, because the residual concentration of boron could not be reduced below 10 mg/dm3, we propose a realistic boron removal wastewater treatment system incorporating the hydrothermal mineralization method.


Keyword:
Continuous-flow detoxification treatment, Boron-containing wastewater, Resource recovery, Hydrothermal mineralization

Received: December 07, 2010
Accepted: January 05, 2011 , Published online: April 01, 2011
Copyright (c) 2011 The Ceramic Society of Japan

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