科研之友
微信
新浪微博
Facebook
分享链接
摘要
Activated sludge was tested for its ability to remove Cu2+ from aqueous solution. The effects of various experimental parameters (initial pH, initial Cu2+ concentration, adsorbent dosage, and temperature) on Cu2+ adsorption were evaluated. The Langmuir isotherm model well described the adsorption of Cu2+ onto activated sludge. The pseudo-second-order kinetic equation was appropriate for describing the kinetic performance of the sorption. Furthermore, Webber-Morris models indicated that the sorption of Cu2+ was generally found to involve with the intraparticle diffusion process. Parameters of adsorption thermodynamic suggested that the interaction of Cu2+ adsorbed by sludge was spontaneous and exothermic. Activated sludge was characterized by Fourier transform infrared spectroscopy analysis and results showed that active groups such as -OH, -COOH, -NH2 were involved in Cu2+ adsorption. Zeta potential analysis demonstrated inner-sphere adsorption for Cu2+ adsorption on sludge.
- 出版日期2014
