In this work, chemically modified corncobs was used as coagulant in waste water treatment. Thischemical modification was performed by allowing powdered corncobs to react with ethylene diamintetraacetic acid (EDTA) and epichlorohydrin in alkaline medium. Factor affecting the nitrogen content in the produced amphoteric corncobs (ACC) e.g. reaction time, temperature and amount of (EDTA) added were studied. The product obtained (ACC) was characterized using analytical and spectrophotometer tools, elemental and thermogravimetrical analysis besides FTIR and¹H-NMR .The product obtained was characterized by FT-IR,¹H-NMR spectroscopy. The adsorption efficiency of (ACC) for metal ions in water as Cu and Zn was determined using atomic absorption spectrometry (AAS). It has been shown that there is a noticeable change in the specification of the treated water by the suggested (ACC) exemplified by least amount of organic matter, turbidity, solid substances and other elements existing in waste water.