TREATMENT OF TANNERY WASTE WATER USING IRON CHLORIDE AS A COAGULANT AND ACTIVATED CHARCOAL AS COAGULANT AID

Industrial activities like electro plating, metal cleaning and dyeing processing, cement, and leather tanning are the major sectors that play role in releasing chromium into the environment. Chrome in the hexavalent form is very toxic (Kisku et al., 2019). It is quite intriguing that contaminated field by industrial effluent show a mobilization ration of less than 5 (potentially toxic) for selected plant specious. Surprisingly, the mobilization ratios for weeds become greater than 5, which have healthy morphology in the early flowering stage (Kisku et al., 1999). A study done by (Marchese et al.,2008) about the rate of accumulation of chromium in four fresh water plant species, clams, crabs, and fishes showed that, all the four fresh water species and animals were found with high concentration of chromium which is an indication of its high accumulation potential. This clearly indicates that this problem become more serious and toxic to human beings, which are found at the top of the food web due to its toxicity and bioaccumulation effect (Jacobs and Testa, 2005).