Share
Export Citation
Adsorption of heavy metals on amine-functionalized MCM-48
Taba P.
Iop Conference Series Materials Science and Engineering
Abstract
The ordered mesoporous silica with cubic structure, MCM-48 was synthesized by post-synthesis under basic media using colloidal silica, cetyltrimethylammonium bromide, and Triton X-100. The modified material, NH2-MCM-48 was prepared using 3-aminopropyl trimetoxysilane (3-APTMS). X-ray diffraction and FT-IR were used to characterize the samples. The modified material was utilized for adsorption of Cu 2+ and Mn 2+ from aqueous solution. Parameters used for studying the adsorption process were pH, time of contact, and the initial concentrations of Cu 2+ and Mn 2+ ions. Desorption of ions from the adsorbent was also studied using several desorbing agents. The pseudo-second order was found to be the kinetic order for the metals adsorption. The adsorption of Cu 2+ and Mn 2+ on NH2-MCM-48 was fixed by the Langmuir model better than the Freundlich model with the capacity of 0.52 and 0.80 mmol g -1 for Cu 2+ and Mn 2+ , respectively. The best desorbing agents for removing the adsorbed Cu 2+ and Mn 2+ from the adsorbent were 1 M HNO 3 and 1 M HC1, respectively.
Access to Document
10.1088/1757-899X/188/1/012015Other files and links
- Link to publication in Scopus
- Open Access Version Available