ABSTRACT
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8.1 INTRODUCTION
Although 70% of the earth area is covered with water, inspite of that it is well known that only 1% of this water can be used for human consumption and other purposes. Men started industrialization of a number of products for the development. As a result, there are a huge number of small and big industries all over the world. A number of heavy metals, inorganic compounds, organic compounds like phenols, pesticides, fertilizers, surfactants, drugs, detergents, insecticides, dyes, and other chemical products are disposed directly into the water resources by these industries, without any effective treatment strategy. All these substances are toxic and harmful to human beings, animals, and plants. Many of these compounds can be readily absorbed through the skin and create health problems.
