Application of surface molecular imprinting adsorbent in expanded bed for the adsorption of Ni(2+) and adsorption model.
A new surface molecular imprinting adsorbent (SMIA) was used in an expanded bed. The expansion ratio and adsorption performance were studied at different volumetric rates, inlet concentrations, and pH values. A model based on the Adams-Bohart adsorption model of breakthrough curves was established. The predicted curves had good agreement with the experimental curves. The breakthrough time (T(1/2)) decreased with increasing inlet concentration when the outlet concentration was half the initial concentration (C/C(0)=0.5). The inlet concentration had little effect on the adsorption rate constant (k(1)) value when the initial concentration (C(0)) was above 150 mg/L. However, T(1/2) values increased with increasing initial pH of the inlet solution, and the k(1) value decreased due to the competition between H(+) and Ni(2+).
Li
Qiang
Q
College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China.
Su
Haijia
H
Li
Jia
J
Tan
Tianwei
T
D000327:Adsorption; D008855:Microscopy, Electron, Scanning; D008956:Models, Chemical; D054802:Molecular Imprinting / Q000379:methods*; D009532:Nickel / Q000737:chemistry*; D011522:Protons
D011522:Protons; D009532:Nickel