Issabayeva Gulnaziya, Aroua Mohamed Kheireddine, Sulaiman Nik Meriam
Faculty of Science and Engineering, University Tunku Abdul Rahman (UTAR), 53300 Setapak, Kuala Lumpur, Malaysia.
J Hazard Mater. 2008 Jun 30;155(1-2):109-13. doi: 10.1016/j.jhazmat.2007.11.036. Epub 2007 Nov 19.
The continuous adsorption of lead ions from aqueous solution on commercial, granular, unpretreated palm shell activated carbon (PSAC) was studied. Effect of pH, flow rates and presence of complexing agents (malonic and boric acids) were examined. The breakthrough period was longer at pH 5 indicating higher adsorption capacity of lead ions at higher pH. Increase of the flow rate, expectedly, resulted in the faster saturation of the carbon bed. Presence of complexing agents did not improve adsorption uptake of lead ions. However, presence of malonic acid resulted in smoother pH stabilization of solution compared to single lead and lead with boric acid systems. The results on continuous adsorption of lead were applied to the model proposed by Wang et al. [Y.-H. Wang, S.-H. Lin, R.-S. Juang, Removal of heavy metals ions from aqueous solutions using various low-cost adsorbents, J. Hazard. Mater. B 102 (2003) 291-302]. The agreement between experimental and modelled breakthrough curves was satisfactory at both pHs.
研究了商业用、颗粒状、未经预处理的棕榈壳活性炭（PSAC）对水溶液中铅离子的连续吸附。考察了pH值、流速以及络合剂（丙二酸和硼酸）的存在对吸附的影响。在pH 5时穿透期更长，表明在较高pH值下铅离子的吸附容量更高。不出所料，流速的增加导致碳床更快饱和。络合剂的存在并未提高铅离子的吸附量。然而，与单一铅体系以及铅与硼酸体系相比，丙二酸的存在使溶液的pH值更稳定。铅的连续吸附结果应用于Wang等人提出的模型[Y.-H. Wang, S.-H. Lin, R.-S. Juang, 使用各种低成本吸附剂从水溶液中去除重金属离子，《危险材料杂志》B 102 (2003) 291 - 302]。在两个pH值下，实验和模拟的穿透曲线之间的一致性都令人满意。
