The subject of this study is a zeolite generated as a by-product of recycling LAS (lithium-aluminum-silicate) resources, a kind of glass and ceramic produced by induction. The zeolite by-product is modified into Mg-zeolite using Mg as a cation to absorb Pb, a heavy metal generated from water pollution caused by recent industrial wastewater. An ion-exchange method is used to carry out the modification process, from zeolite byproduct to Mg-zeolite, and simultaneously absorb the Pb in the heavy-metal solution (99.032 mg/L). It is found that the sodium zeolite in the raw material residue can be modified to magnesium zeolite by reacting it with a mixture solution at 1 M concentration for 24 h. As a result, it is found that the residual Pb (0.130 mg/L) in the heavy metal solution is shown to be absorbed by 99.86%, with successful formation of a Mg-modified zeolite.

Abstract
1. Introduction
2. Materials
    2.1 Experimental Materials
    2.2 Experimental Method
    2.3 Analysis Method
3. Results and Discussion
    3.1 Analysis of raw material residue
    3.2 Modification of Mg-zeolite
    3.3 Absorption test of heavy metal (Pb)
4. Conclusion
    4.1 Modification of Mg-zeolite
    4.2 Absorption of heavy metal (Pb)
References

• Jei-Pil Wang(Department of Metallurgical Engineering, Pukyong National University) Corresponding Author
• Gyu-Cheol Kim(Department of Metallurgical Engineering, Pukyong National University)
• Min-Seok Go(Department of Metallurgical Engineering, Pukyong National University)