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Please use this identifier to cite or link to this item: http://hdl.handle.net/1860/2619

Title: Water structure and its influence on the flotation of carbonate and bicarbonate salts
Authors: Ozdemir, O.
Çelik, M. S.
Nickolov, Z. S.
Miller, J. D.
Keywords: Interfacial Water Structure;Trona;Salt Flotation;Water Structure Makers And Breakers;FTIR;Carbonate And Bicarbonate Salts;Viscosity
Issue Date: 2007
Publisher: Elsevier
Citation: Journal of Colloid and Interface Science, 314(2): pp. 545-551.
Abstract: Interfacial water structure is a most important parameter that influences the collector adsorption of salt minerals such as borax, potash and trona. According to previous studies, salts can be classified as water structure makers and water structure breakers. Water structure making and breaking properties of salt minerals in their saturated brine solutions are essential to explain their flotation behavior. In this work, water structure making-breaking studies in solutions of carbonate and bicarbonate salts (Na2CO3, K2CO3, NaHCO3 and NH4HCO3) in 4 wt% D2O in H2O mixtures have been performed by FTIR analysis of the OD stretching band. This method reveals a microscopic picture of the water structure making/breaking character of the salts in terms of the hydrogen bonding between the water molecules in solution. The results from the vibrational spectroscopic studies demonstrate that carbonate salts (Na2CO3 and K2CO3) act as strong structure makers, whereas bicarbonate salts (NaHCO3 and NH4HCO3) act as weak structure makers. In addition, the changes in the OD band parameters of carbonate and bicarbonate salt solutions are in agreement with the viscosity characteristics of their solutions.
URI: http://dx.doi.org/10.1016/j.jcis.2007.05.086
Appears in Collections:Faculty Research and Publications (MSE)

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