A Study on Adsorptive Capacity of Modified Manganese to Zn~(2+) from Water

The natural manganese taken from Qingliu County,Fujian Province is a raw material.This paper studies the adsorption to Zn2+ from water by modified manganese under different response conditions,and obtains the optimized preparation conditions.That is: Oxalic acid amount is 2.0 mmol.g-1(to powdered ore),potassium permanganate amount 1.5 mmol·g-1(to powdered ore),sulfuric acid concentration 1mol·L-1,responds under room temperature for 45 min.under the conditions of 25℃,pH=5.0,time is 40min,the modified manganese ore to the Zn2+ saturated adsorptive capacity is 63mg·g-1,the natural manganese ore is 12 mg·g-1.The results show that adsorption capacity to Zn2+ from water by the modified manganese compared with that of natural manganese has significantly been improved under the experimental conditions.