naa a22 4500 510820530 CHVBK 20180411083529.0 cr unu---uuuuu 180411e20131001xx s 000 0 eng 10.1007/s11814-013-0130-8 doi (NATIONALLICENCE)springer-10.1007/s11814-013-0130-8 Surface chemistry and adsorption mechanism of cadmium ion on activated carbon derived from Garcinia mangostana shell [Elektronische Daten] [Yee Kang, Mei Poon, Purushothaman Monash, Shaliza Ibrahim, Pichiah Saravanan] A detailed surface characterizations and adsorption mechanism of Cd2+ on chemical activated carbon (CAC) prepared from Garnicia mangostana shell were investigated. The activation is accomplished in self-generating atmosphere using phosphoric acid as activating agent. The characterizations performed are elemental analysis, functional group identification, N2 adsorption isotherm and surface charges. Adsorption mechanism of metal ion was tested using Cd2+ as model ion. CAC achieved BET surface area of 1,498 m2/g with a mixture of micro and mesopores. The point of zero charge is observed to be at pH 2.8 and the optimum pH for Cd2+ adsorption on CAC is 12. The adsorption isotherm followed the Freundlich model, and the adsorption kinetics was explained by pseudo-second order kinetic model. From thermodynamic studies, the adsorption was found to be physical adsorption. X-ray photoelectron spectroscopy (XPS) confirmed the adsorption of Cd2+ onto CAC as +2 oxidation state. Korean Institute of Chemical Engineers, Seoul, Korea, 2013 Garcinia mangostana nationallicence Activated Carbon nationallicence Adsorption Mechanism nationallicence Surface Chemistry nationallicence Kang Yee Environmental Engineering Laboratory, Department of Civil Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia aut Poon Mei Environmental Engineering Laboratory, Department of Civil Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia aut Monash Purushothaman Department of Chemical Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia aut Ibrahim Shaliza Environmental Engineering Laboratory, Department of Civil Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia aut Saravanan Pichiah Environmental Engineering Laboratory, Department of Civil Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia aut Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/10(2013-10-01), 1904-1910 0256-1115 30:10<1904 2013 30 11814 https://doi.org/10.1007/s11814-013-0130-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11814-013-0130-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kang Yee Environmental Engineering Laboratory, Department of Civil Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia aut NATIONALLICENCE 700 1- Poon Mei Environmental Engineering Laboratory, Department of Civil Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia aut NATIONALLICENCE 700 1- Monash Purushothaman Department of Chemical Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia aut NATIONALLICENCE 700 1- Ibrahim Shaliza Environmental Engineering Laboratory, Department of Civil Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia aut NATIONALLICENCE 700 1- Saravanan Pichiah Environmental Engineering Laboratory, Department of Civil Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia aut NATIONALLICENCE 773 0- Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/10(2013-10-01), 1904-1910 0256-1115 30:10<1904 2013 30 11814 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer