Adsorption Kinetics and Thermodynamics of Methyl Orange on Ethylenediamine-Modified Chitosan Magnetic Nano-Adsorbent
Ethylenediamine-modified chitosan magnetic nano-adsorbent (EMCN) was prepared and used for the sorption of methyl orange(MO). The kinetics of the sorption fitted well with the pseudo-second-order kinetics model. The activation energy of sorption (Ea) was determined to be 16.47 kJ.mol-1. Adsorption isotherms showed that the sorption process was consistent with both Langmuir and Freundlich isotherm, and the thermodynamic parameters were calculated and indicated that the sorption process was spontaneous and exothermic. The saturated sorption capacity is 247.66, 227.58, 214.19 mg.g-1 at 5°C, 25°C, 45°C(pH=5.6),respectively.
Jimmy (C.M.) Kao, Wen-Pei Sung and Ran Chen
Y. H. Chen and S. Q. Hu, "Adsorption Kinetics and Thermodynamics of Methyl Orange on Ethylenediamine-Modified Chitosan Magnetic Nano-Adsorbent", Advanced Materials Research, Vols. 581-582, pp. 273-276, 2012