Industrial waste water samples were collected from pretreatment units of electroplating section in The State Company for Electrical Industries (SCEI), Al-Waziriya- Iraq-Baghdad. Waste water sample were collected in the period between 4th and 20th of March 2012. The sample was divided into two sub-samples, the first was examined for chemical & physical analysis and the second was employed for removal of zinc, chromium and nickel ions. On the other hand, the plant waste was Corn cobs which obtained from Local Markets (Grocery stores) in Baghdad