| Title |
Adsorption Effects of Zeolite for Treatment of Heavy Metals in Wastewater (1) |
| Authors |
임굉 ; 김용욱 ( Goeng Yim ; Yong Wook Kim ) |
| Abstract |
The properties and uses of zeolite are being explored in many scientific disciplines: mordern inorganic and organic chemistry, ceramics, physical chemistry, biochemistry, catalysis, and in all types of chemical engineering process technology. The wide variety of applications includes separation and recovery of normal paraffin hydrocarbons, recovering heavy metal ions from industrial wastewater, and removal of atmospheric pollutants. The applications of zeolite have been carried out in the various aspects because of its large cation exchange capacity and adsorption properties. In this paper, the adsorption effect of heavy metal ions in wastewater on zeolite by batch adsorption process is studied. The results abstained were as follows; The amounts adsorbed ions were changeable by initial pH and ionic concentration. The order in heavy metal ions were adsorbed on zeolite was; Pb(II) $gt;$gt;Cd(II) $gt; Cu(II) $gt; Zn(II). This tendency was interpreted by the fact that the smaller the radius of hydrated metal ion is, the more is the metal ion adsorbed on zeolite. The adsorption rate was relatively fast and it was confirmed by shaking test. Under the same conditions, the heavy metal ions were more adsorbed on clinoptilolite than on mordenite. The species of exchangeable cation of zeolite had an effect on its removing ability and the sodium exchanged type was the most excellent. |