Journal of Metals, Materials and Minerals

Publication Date



Adsorption efficiency of polycyclic aromatic hydrocarbons (PAHs) contamination in water with rice husk fly ash from a power plant was investigated in comparison with coal fly ash and silica from rice husk fly ash, with and without surface treatment. Naphthalene was used as a representative for PAHs, and Cethyltrimethylammoniumbromide (CTAB) was used as surface treating agent for the present study. Various factors, such as shaking rate, shaking time, pH of naphthalene aqueous solution, and adsorbentnaphthalene weight ratio, were investigated to identify the optimum condition for each adsorbent. Upon using 0.3 g adsorbent in 100 ml of 10 mg/l naphthalene solution, the optimum condition was observed to be shaking the mixture of an adsorbent and naphthalene solution with pH 2 at 250 rpm for 60 minutes. Similar optimum conditions were also observed for all adsorbents used in the present study, except for the highest efficiency of silica from rice husk fly ash treated with CTAB. In addition, upon varying weight ratios of adsorbent and naphthalene, adsorption efficiency was observed to gradually increase and reach equilibrium at the ratio of 0.7 g adsorbent per mg naphthalene. Therefore, the optimum condition for the present study should be using 0.7 g adsorbent per mg naphthalene in solution with pH 2 and shaking at 250 rpm for 60 minutes. The adsorption behavior of the system was also investigated and found to be in line with Freundlich Isotherm.

First Page


Last Page




To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.