Adsorption of heavy metals on amine-functionalized MCM-48

International Symposium on Current Progress in Functional Materials

Taba, P.^1 ; Budi, P.^1 ; Puspitasari, A.Y.^1

Physical Chemistry Laboratory, Universitas Hasanuddin, Jl. Perintis Kemerdekaan KM. 10, Tamalanrea Indah, Kota Makassar, Sulawesi Selatan

90245, Indonesia^1

关键词: Adsorption process;    Cetyl trimethyl ammonium bromides;    Colloidal silica;    Freundlich models;    Initial concentration;    Modified materials;    Ordered mesoporous silicas;    Pseudo second order;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/188/1/012015/pdf
DOI  :  10.1088/1757-899X/188/1/012015

来源: IOP

【 摘 要 】

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 Cu2+and Mn2+from aqueous solution. Parameters used for studying the adsorption process were pH, time of contact, and the initial concentrations of Cu2+and Mn2+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 Cu2+and Mn2+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-1for Cu2+and Mn2+, respectively. The best desorbing agents for removing the adsorbed Cu2+and Mn2+from the adsorbent were 1 M HNO3and 1 M HC1, respectively.