Has been research conducted of natural bentonite clay adsorpti• on of Mn2 + and Cr3+ and its application in peat water. This research aimed to determined the characteristics of natural bentonite, determined the optimum adsorption time Mn + and Cr3+’ determined the adsorption capacity of natural bentonite clay as absorbent Mn2+ and Cr3+ and its application in the peat water was taken from th…