Tạ̣p chí Khoạ học Đạ̣i học Huế : Khoạ học Tự nhiế n; issn 1859-1388

 
 
 

Hoàng Văn Đức vạ̀ Lê Thị Diệu Linh 
Tập 126, Số 1A, 2017 
206 
KINETICS AND ISOTHERMS OF Cu(II) ADSORPTION 
ONTO Ze–RHM–41 MATERIAL 
Hoang Van Duc*, Le Thi Dieu Linh 
HU – University of Education,
34 Le Loi, Hue City, Vietnam
Abstract: A zeolite-containing MCM–41 mesoporous material (Ze–RHM–41) was synthesized using the 
direct method with a sodium silicate solution prepared from rice husk ash as a silica source. The synthe-
sized material was characterized using XRD, TEM, and EDX techniques. The sorption behaviors of Cu(II) 
ions onto the material were studied. The results showed the presence of mesoporous MCM–41 and 
microporous Y type molecular sieves in the material with its highly ordered hexagonal mesostructures. 
The adsorption capacity of the synthesized material for Cu(II) ions was significantly improved and influ-
enced by the Cu(II) initial concentration. The pseudo–second–order kinetic model could fit the rate equa-
tion of Cu(II)
adsorption onto the Ze–RHM–41 solids. The Langmuir isotherm is more suitable than the 
Freundlich isotherm for the adsorption of the Cu(II) ions onto the synthesized material.
Keywords: Ze–RHM–41, rice husk ash, Cu(II), adsorption