Adsorption of Cadmium Ions from Aqueous Solutions by Pine Sawdust
The effect of some parameters on the biosorption of cadmium was studied using pine sawdust as the solid adsorbent. Results show that the smaller the size of the adsorbent particles, the higher the percentage of cadmium retrieved, up to 99％ for sizes ranging between 0.250 and 0.355 mm. Biosorption was determined to be enhancing at pH approaching 8, decreasing considerably when the acidity in the medium increased. With the temperature increases and the initial Cd2+ concentration decreases, the removal of Cd2+ by pine sawdust increases. As the solid to liquid ratio increases, the percentage of cadmium removed increases. The biosorption process was found to occur rapidly, I.e. the maximum sorption capacity was reached within 30 min. The biosorption process follows pseudo-second-order kinetics.
pine sawdust cadmium biosorption kinetics
CHEN Yunnen REN Rushan LIANG Qi
School of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China
国际会议
2007环境科学与技术国际会议(The 2007 International Symposium on Environmental Science and Technology)
北京
英文
2007-11-13（万方平台首次上网日期，不代表论文的发表时间）