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Title: Study of a few clays of Assam and Meghalaya and their utility in pollution control
Researcher: Phukan, Gopal
Guide(s): Acharyya, Mahendra N
Keywords: Clays
University: Gauhati University
Completed Date: 31/12/1994
Abstract: The thesis consists of four chapters Chapter 1 gives a broad introduction to the topic. After outlining the objectives of the study, this chapter deals with the general features of the clays and clay minerals including occurrence and formation of clays. The structural features of the clays have been briefly described with an emphasis on the kaolinite structure. Important physico-chemical properties of the clays, e.g. ion exchange characteristics, water holding capacity, etc. are reviewed. The areas of applications of clays are summarised giving an insight into the important industrial and commercial utility of the clays. The chapter then reviews the role of the clays in the environment particularly with respect to adsorptive behaviour, selectivity and stereospecifi-city of interactions of the adsorbed components, etc. The basis of clay-water, clay-air and clay-soil interactions can be traced to properties of the clay surface. Clay-metal interactions and role of clays in pollution abatement are described with particular emphasis. The chapter concludes with a short note on the occurrence of clays in Assam and Meghalaya, India. [33 pages, 4 figures, 116 references] Chapter 2 deals with experimental methodology. It starts with a description of the locations from which clay samples were collected and procedure used for purification of the clays. The chapter then briefly enumerates the methods followed in chemical analysis (determination of silica, alumina and other oxides, Na, K, Fe, Ca, Mg, Ti, trace elements and rare earths) of the clays, in determining moisture content and Loss on Ignition. The procedures adopted in applying XRD, FTIR and DTA techniques for determination of minerals present in the clays, are also described. The chapter finally gives a brief description of the methodology used in studing the removal of pollutants by the clays. [ 13 pages, 1 figure, 24 references] Chapter 3 discusses the results of physico-chemical characterization of the clays from five locations, viz., Nangwalbibra, Upper Deopani,...
Appears in Departments:Department of Chemistry

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02_certificate.pdf19.57 kBAdobe PDFView/Open
03_acknowledgement.pdf29.06 kBAdobe PDFView/Open
04_abstract.pdf66.52 kBAdobe PDFView/Open
05_content.pdf48.68 kBAdobe PDFView/Open
06_list of tables.pdf27.92 kBAdobe PDFView/Open
07_list of figures.pdf39.34 kBAdobe PDFView/Open
08_chapter 1.pdf743.83 kBAdobe PDFView/Open
09_chapter 2.pdf363.29 kBAdobe PDFView/Open
10_chapter 3.pdf1.21 MBAdobe PDFView/Open
11_chapter 4.pdf2.98 MBAdobe PDFView/Open
12_list of publication.pdf21.24 kBAdobe PDFView/Open

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