Abstract
Management of wastewater in a suitable way is the dire need of today. Wastewater contains varieties of contaminants, which make water toxic and unfit for re-usable. Heavy metals contribute to a large part of water contamination and Chromium (VI) is a major toxic heavy metal which usually found in wastewater. Many synthetic adsorbents such as metal oxides, chelating agents are reported having high adsorption capacity and high removal efficiency, but disposal of such synthetic adsorbents is a problem due to their non-biodegradable nature. This limitation of synthetic adsorbents results in the use of natural products and by products as the adsorbents for removal of Chromium (VI) from wastewater. In past decades a lot of work has been done for water purification especially for the removal of Chromium (VI) metals by utilizing natural products. But all these information is scattered. Herein, an attempt is made to present the scattered information into a systematic way in the form of review article. In this review, hexavalent form of chromium removal by low-cost natural products and by products is summarized.
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