@article{(Open Science Index):https://publications.waset.org/pdf/11878, title = {The Adsorption of Lead from Aqueous Solutions Using Coal Fly Ash : Effect of Crystallinity}, author = {Widi Astuti and Agus Prasetya and Endang Tri Wahyuni and I Made Bendiyasa}, country = {}, institution = {}, abstract = {Coal fly ash (CFA) generated by coal-based thermal power plants is mainly composed of some oxides having high crystallinity, like quartz and mullite. In this study, the effect of CFA crystallinity toward lead adsorption capacity was investigated. To get solid with various crystallinity, the solution of sodium hydroxide (NaOH) of 1-7 M was used to treat CFA at various temperature and reflux time. Furthermore, to evaluate the effect of NaOH-treated CFA with respect to adsorption capacity, the treated CFA were examine as adsorbent for removing lead in the solution. The result shows that using NaOH to treat CFA causes crystallinity of quartz and mullite decrease. At higher NaOH concentration (>3M), in addition the damage of quartz and mullite crystallinity is followed by crystal formation called hydroxysodalite. The lower crystalllinity, the higher adsorption capacity.}, journal = {International Journal of Chemical and Molecular Engineering}, volume = {5}, number = {6}, year = {2011}, pages = {506 - 511}, ee = {https://publications.waset.org/pdf/11878}, url = {https://publications.waset.org/vol/54}, bibsource = {https://publications.waset.org/}, issn = {eISSN: 1307-6892}, publisher = {World Academy of Science, Engineering and Technology}, index = {Open Science Index 54, 2011}, }