سال انتشار: ۱۳۹۱

محل انتشار: نهمین کنگره بین المللی مهندسی عمران

تعداد صفحات: ۸

نویسنده(ها):

a Karimi-Jashni – Assist. Prof., Dept. of Civil and Environmental Eng., Shiraz University, Shiraz
S Saadat – Ph.D. Student of Civil Eng., Dept. of Civil and Environmental Eng., Shiraz University

چکیده:

Metal adsorption efficiency may be influenced by many operating conditions. It would be useful for the understanding of the complexity of adsorption systems to know the interactive effects of the factors involved. In this study 24 full factorial design experiments were used to screen the factors affecting the Pb2+ and Ni2+ removal efficiency using modified walnut shell. In factorial design experiments, four factors pH, adsorbent dose, initial concentration of metal ions and temperature were varied at two levels. Using the experimental results, a linear mathematical model was obtained. The adsorbent dosage was found to have the most significant influence on the Pb2+ removal efficiency. However for Ni2+ uptake, solution pH was the most important parameter.