Abstract

Fresh-water comes from the rain which finally goes into the ocean via rivers. The human beings store this water and use it in a variety of purposes such as drinking, washing, irrigation and in industries etc., Wastewater is generated after the utilization of pure water in domestic, industrial, agricultural, municipal and other activities. The growing population and urbanization are the principal reason of continuous increase in wastewater generation. Wastewater contains a number of contaminants like organic materials, biological components and toxic inorganic compounds which cause adverse effect on the human health. Many inorganic chemicals are conventionally used as coagulant for the treatment of wastewater. Theses coagulants have the ability to change the physico-chemical properties of the treated water. In this review paper, we have described the used of naturally-occurring polymers as coagulants in wastewater treatment. These coagulants have more potential for coagulation and are also eco-friendly and biodegradable in nature; moreover, these coagulants do not adversely affect the human health and do not induce change in the physico-chemical properties of treated water.

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