Salim M R, Othman F, Imtiaj Ali Md, Patterson J, Hardy T
Department of Environmental Engineering, Faculty of Civil Engineering, Universiti Teknologi Malaysia, Skudai, Johor Bahru.
Water Sci Technol. 2002;46(9):339-46.
Several types of water treatment technologies including adsorption are now being used to treat polluted water. In this paper the removal of phenol by adsorption will be discussed. Activated carbons are successfully applied for purification of potable water and the removal of organic pollutants in wastwater. This paper is concerned with a low cost approach to treating waste water that is significant especially for those countries where oil palm is an available agricultural product like Malaysia, Ivory Coast, Nigeria, Thailand, Papua New Guinea. In the coastal region coconut is an available agricultural product and activated carbon prepared using coconut shell is also an economical method of water treatment. The materials used in this study were Commercial Activated Carbon (CAC), prepared from coconut shell and Modified Oil Palm Shell (MOPAS) of 1 to 2 mm diameters. The surface area of CAC and MOPAS was 38.5 m2/g and 38.2 m2/g respectively and the iodine number was determined as 674 and 454 for CAC and MOPAS, respectively. From the study the result shows above 70% removal efficiency for 5 mg/L and 40% removal efficiency for 20 mg/L of phenol solution. The performance efficiency will be discussed based on batch test, following Freundlich adsorption isotherm. The results indicate that CAC exhibits a higher adsorptive capacity (Kf of 0.079) as compared to MOPAS (Kf of 0.048). Hence a better removal efficiency for CAC at lower concentration of phenol. Results from column tests show a better adsorptive capacity for CAC (2.73) as compared to MOPAS (2.48).
包括吸附在内的几种水处理技术目前正被用于处理污水。本文将讨论通过吸附去除苯酚的方法。活性炭已成功应用于饮用水净化及废水中有机污染物的去除。本文关注一种低成本的废水处理方法，这对于那些油棕是可利用农产品的国家（如马来西亚、象牙海岸、尼日利亚、泰国、巴布亚新几内亚）尤为重要。在沿海地区，椰子是可利用的农产品，用椰壳制备活性炭也是一种经济的水处理方法。本研究中使用的材料是商业活性炭（CAC），由椰壳制备而成，以及直径为1至2毫米的改性油棕壳（MOPAS）。CAC和MOPAS的表面积分别为38.5平方米/克和38.2平方米/克，CAC和MOPAS的碘值分别测定为674和454。研究结果表明，对于5毫克/升的苯酚溶液，去除效率高于70%；对于20毫克/升的苯酚溶液，去除效率为40%。将根据分批试验，遵循弗伦德里希吸附等温线来讨论性能效率。结果表明，与MOPAS（Kf为0.048）相比，CAC表现出更高的吸附容量（Kf为0.079）。因此，在较低苯酚浓度下，CAC具有更好的去除效率。柱试验结果表明，与MOPAS（2.48）相比，CAC具有更好的吸附容量（2.73）。
