الفهرس 
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Abstract
There are a number of techniques, which have been common for wastewater
treatment. Such techniques are: chemical oxidation, adsorption and liquid-liquid
extraction. The first two methods merely transfer the pollutants from one phase
to another and the last requires large plants, is often tricky to manage and often
is not sufficient for highly contaminated or toxic wastewater.
Advanced Oxidation Processes, AOPs, promise to not only treat but also
destroy (mineralize) organic pollutants. These technologies are based on the
generation of highly reactive intermediates (principally hydroxyl radicals),
which are more powerful oxidants than the chemical agents used in the
traditional chemical methods, they are characterized by a selectivity of attack;
they are capable of attacking the organic pollutants and initiating their oxidation
and eventual mineralization. Most of the commercially developed AOPs are
based on the use of ultraviolet light to generate the hydroxyl radical
photochemically. It would be highly appreciated if the DV source is obtained
from sun. This approach to a solar driven AOP is called solar detoxification. The
work in the present thesis is based on the use of a homogenous photo-Fenton
catalyst, which captures the solar energy for the destruction of organic pollutants
in aqueous media. Sunlight is captured by the ferrioxalate, which, in the
presence of hydrogen peroxide, generates hydroxyl radicals at pH 3.0. The
latters react with and oxidize organic molecules present in aqueous media.
The present work deals with a study on the operational parameters
influencing the photocatalytic destruction rate of Methylene Blue and Maxilione
Blue dyes. The parameters studied are: pollutant concentration, catalyst
concentration, effluent flow rate, solar intensity, artificial DV source and the
effect of adding H202 at time intervals.