Removal of Pb~(2+) and Hg~(2+) by Novelty Zeolite Produced from Fly Ash to Prevent Water Pollution

摘要

The novelty zeolite was produced from fly ash (FA) by hydrothermally treatment in an alkaline solution for 6(FA6), 12(FA12), and 24h(FA24). The physical and chemical properties of them were measured for the evaluation adsorption ability of Pb~(2+) and Hg~(2+). The specifics surface area, the pore volume, and the cation exchange capacity of FA6, FA12, and FA24 was larger than those of FA. These results indicated that the hydrothermally treatment in an alkaline solution was useful for producing the novelty zeolite for removal of Pb~(2+) and Hg~(2+) from water. Additionally, the amount of Pb~(2+) and Hg~(2+) adsorbed was proportional to the specific surface area(r= 1.000), the pore volume(r =0.998), and cation exchange capacity(r=0.992). Moreover, the adsorbent surface before and after adsorption was analyzed by electron probe micro analyzer and X-ray photoelectron spectroscopy. Only Pb~(2+) was existed on adsorbent surface after adsorption. These results revealed that the produced zeolite was useful for removal of Pb~(2+) and Hg~(2+) from aqueous solution and for decreasing water contamination.