Treatment technologies for chromiumvi 275 crvi is far more mobile than criii and more difficult to remove from water it is also the toxic form of cr approximately 10 to 100 times more toxic than criii by the acute oral route presumably owing to the stronger oxidizing potential and membrane transport of crvi katz and salem 1992. The hexavalent chromium is a priority toxic mutagenic and carcinogenic chemical hence it is very much required to remove chromium vi from the industrial effluents before allowing it to enter any water system or on to the land. Chromium reduction from waste water8 tougan natural mixed clays for chromium iii removal from aqueous solution were used as a cheap and environmentally friendly method the tou clay was alkaline with ph value of chang carried research on chromium removal from waste water 9. The maximum removal of crvi was observed at ph 2 adsorption capacity was found to be 45 mg g of adsorbent at crvi concentration in the effluent being 250 mg l a waste water sample containing crvi criii mg and ca obtained from industrial unit showed satisfactory removal of chromium. Methods for removal of chromium from wastewater presentation by arvind gupta mtech ch third sem roll no 09201101 nit jalandhar 2 background informationo chromium is a metal that exists in several oxidation or valence states ranging from chromium ii to chromium vio
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