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Title: Adsorption of simple aromatic organic acids anions at the alumina water interface influence of functionality and background electrolytes
Researcher: Borah, Jayanta Madhab
Guide(s): Mahiuddin, Sekh
Keywords: Acids
University: Gauhati University
Completed Date: 31/12/2010
Abstract: The adsorption of a surface-active agent at the solid-liquid interface significantly changes the properties of the solid surface. As a result, adsorption of a surface-active agent onto a mineral oxide surface plays an important role in the field of mineral processing, soil remediation, wetting and dispersion stability and various practical fields of science (Brady et al., 1986; Davis and Hayes, 1986; Somasundaran and Moudgil, 1987; Stumm et al., 1986). The interactions of a well-defined and simple organic acid having different functional groups, like -COOH and phenolic - OH groups, with the mineral oxide surfaces are different in the presence of different background ions. The influence of functionality of a surface-active agent is reflected in the adsorption kinetics, adsorption isotherms and surface complexation onto a mineral oxide surface (Das and Mahiuddin, 2007; Guan et al., 2006a, 2006b). Nevertheless, the background electrolytes (anions and cations) also significantly govern the adsorption behaviour of a surface-active agent onto a mineral oxide surface (Ali and Dzombak, 1998a; Axe et al., 2006; Rahnemaie et al., 2007). A surface-active agent forms either outer- or inner- sphere surface complexes with the mineral oxide surfaces depending on the chemical environment of the system. The inner-sphere surface complexation causes mineral dissolution (Johnson et al., 2005; Nordin et al., 1997; Slowey et al., 2005; Stumm and Kummert, 1987; Yoon et al., 2005, 2004). The simple aromatic organic acids mimic the natural organic matter and behave like a surface-active agent but not like a typical surfactant (Macinnis et al., 2000). The thesis entitled quotAdsorption of simple aromatic organic acids/anions at the a-alumina/water interface: influence of functionality and background electrolytesquot consists of seven chapters. Chapter-I: Introduction A review on the adsorption of simple and well-defined organic acids onto metal oxides surfaces and the effect of functionality, pH and background electrolytes are described in this
Appears in Departments:Department of Chemistry

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05_acknowledgement.pdf67.96 kBAdobe PDFView/Open
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08_chapter 1.pdf1.37 MBAdobe PDFView/Open
09_chapter 2.pdf266.89 kBAdobe PDFView/Open
10_chapter 3.pdf932.96 kBAdobe PDFView/Open
11_chapter 4.pdf1.45 MBAdobe PDFView/Open
12_chapter 5.pdf641.45 kBAdobe PDFView/Open
13_chapter 6.pdf944.69 kBAdobe PDFView/Open
14_chapter 7.pdf552.72 kBAdobe PDFView/Open
15_references.pdf697.61 kBAdobe PDFView/Open
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17_reprints.pdf3.23 MBAdobe PDFView/Open

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