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Received November 21, 2011
Accepted March 20, 2012
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Boron removal by means of chemical precipitation with calcium hydroxide and calcium borate formation
Department of Environmental Engineering, Atatürk University, Erzurum, Turkey 1Department of Chemistry, Science Faculty, Çanklrl Karatekin University, Çanklrl, Turkey
Korean Journal of Chemical Engineering, October 2012, 29(10), 1382-1387(6), 10.1007/s11814-012-0040-1
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Abstract
Boron removal was investigated by chemical precipitation from aqueous solutions containing boron using calcium hydroxide. pH, initial boron concentration, amount of Ca(OH)2, stirring speed and solution temperature were selected as operational parameters in a batch system. The highest boron removal efficiency was reached at pH 1.0. Increasing initial boron concentration and amount of calcium hydroxide raised to boron removal efficiency. Boron removal efficiency was highest at a stirring speed of 150 rpm. The most important parameter affecting boron removal_x000D_
efficiency was solution temperature. Increasing solution temperature increased importantly boron removal. XRD analysis showed that CaB3O3(OH)5·4H2O, which is a borate mineral called inyoite, occurred between Ca(OH)2 and borate ions. As a result of the obtained experimental data, when the optimum operational conditions were selected, over 96% of boron removal efficiency was reached by this method.
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References
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Koseoglu H, Harman BI, Yigit NO, Guler E, Desalination., 258 (2010)
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Yazicigil Z, Oztekin Y, Desalination, 190(1-3), 71 (2006)
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Itakura T, Sasai R, Itoh H, Water Res., 39, 2543 (2005)
Garcia-Soto MDD, Camacho EM, Sep. Purif. Technol., 48(1), 36 (2006)
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Ghosh J, Chattopadhayay SK, Meikap AK, Chatterjee SK, J. Alloy. Compd., 453, 131 (2008)
Na JW, Lee KJ, Ann. Nucl. Energy., 20, 455 (1993)
Hou DY, Wang J, Sun XC, Luan ZK, Zhao CW, Ren XJ, J. Hazard. Mater., 177(1-3), 613 (2010)
Yilmaz AE, Boncukcuoglu R, Kocakerim MM, Kocadagistan E, Desalination, 230(1-3), 288 (2008)
Ozurk N, Kavak D, Kose TE, Desalination, 223(1-3), 1 (2008)
Cengeloglu Y, Arslan G, Tor A, Kocak I, Dursun N, Sep. Purif. Technol., 64(2), 141 (2008)
Ferreira OP, Moraes SG, Duran N, Cornejo L, Chemosphere., 62, 80 (2006)
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Tsai HC, Lo SL, J. Hazard. Mater., 186(2-3), 1431 (2011)
Irawan C, Kuo YL, Liu JC, Desalination., 280, 280 (2011)
