DSpace Repository :: Browsing Theses by Issue Date

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Fluorescent Molecular Sensors Design, Synthesis and Ion Recognition Study

(2011-10-03T05:35:09Z) Patra, Subrata

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Layered Double Hydroxides Variations of Synthesis Methodologies and Their Influence on Catalytic Behavior – A Structure-Property Relationship Study

(2011-10-03T06:33:14Z) Churchil, Angel Antony Raj J.

Clays are naturally occurring materials composed primarily of fine-grained minerals. Clay has been defined as an earthy material that forms a coherent, sticky mass when mixed with water and when wet this mass can be readily moldable. The two main features that evoke the interest on clays are their common availability and their extra ordinary properties [1]. Clays find their potential application in ceramics, building materials, adsorbents, ion–exchangers, sensors, decolorizing agents and catalysis [2]. The adsorptive power and high water retention capacity of clays are responsible for their wide applications. The first and most widely known application of clay on catalysis is French Houdry cracking process developed in 1930 [3]. Clays, forms a subset of large discipline of catalysts in particular as heterogeneous catalysts. This shows the importance of working on clays and clay based compounds. Clays are classified into two categories:

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Development of Novel Photocatalytic Materials and Surfaces for Environmental Clean-up

(2011-10-03T08:43:26Z) Surolia, Praveen Kumar

During the past several decades, the growth of population and the activities in industries and agriculture have significantly altered the environment and reduced the availability of natural resources. Moreover, some of the activities results in persistent and toxic organic substrates and hazardous wastes as pollutants in wastewater effluent, underground storage tanks and dump sites of industrial manufacture. Typical wastes of concern include volatile organics, chlorinated volatile organics, dioxins, dibenzofurans, pesticides, nitro-aromatic compounds, PCB's, chlorophenols, asbestos, heavy metals, arsenic compounds, aviation fuel, solvents, and degreasing agents. Due to disposal of these chemicals, the surrounding soil and underlying groundwater aquifers have become contaminated resulting into lot of stress on the availability of fresh water. Therefore, the control of chemical pollutants has received much attention. The removal of the pollutants by complete mineralization of a wide range of chemical compounds has become relevant and important. Innovative water and wastewater technologies are needed to meet the challenges of deterioration of water quality

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Studies on Molecular Sensors for the detection of Alkali, Alkaline Earth and Toxic Heavy Metal Ions

(2011-10-07T10:34:02Z) Boricha, Vinod P.

Fluoroionophores incorporating macrocyclic unit as ionophore and Ru(bpy)3 moiety as fluorophore have been synthesized and their ion binding property with a large number of cations and anions have been investigated.

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Microbial Diversity and Characterization of Alkaliphilic Bacteria

(2011-10-07T10:41:27Z) Datta, Sumitra

One of India's most industrialized states, Gujarat is the largest producer of soda ash manufacturing about 90% of the country’s total requirement. Generally, soda ash effluents are characterized by an alkaline pH. This is an early attempt to study the cultivable microbial diversity and molecular characterization of alkaliphilic bacteria, based on 16S rRNA gene sequences isolated from the effluent and sludge samples of a soda ash industry located on the West coast of Gujarat. The effluent and sludge samples had a high pH ranging from 8.75 to 10.75. While their TDS and salinity ranged between 142 ppm to 54300 ppm and 0.0052% to 5.21% respectively