naa a22 4500 510820964 CHVBK 20180411083531.0 cr unu---uuuuu 180411e20130801xx s 000 0 eng 10.1007/s11814-013-0079-7 doi (NATIONALLICENCE)springer-10.1007/s11814-013-0079-7 Synthesis of a new low-cost activated carbon from activated sludge for the removal of Cr (VI) from aqueous solution: Equilibrium, kinetics, thermodynamics and desorption studies [Elektronische Daten] [Fatemeh Gorzin, Ali Ghoreyshi] Elimination of Cr (VI) from aqueous solution was investigated by a new low cost activated carbon developed from aerobically digested activated sludge (ADAS). The adsorbent demonstrated remarkable characteristics such as high surface area of 760m2·g−1 and large total pore volume of 0.8383 cm3·g−1. The maximum equilibrium uptake of Cr (VI) was 70.15 mg·g−1 at optimum pH 2.0. Interpretation of equilibrium data revealed that the best description was provided by the Freundlich isotherm. The kinetics of Cr (VI) adsorption was well described by the pseudo-second order equation. Calculation of thermodynamic parameters revealed that the adsorption process was endothermic, spontaneous and feasible. The adsorbent was regenerated using NaOH and it was found to be suitable for reuse in successive adsorption-desorption cycles. The desorption efficiency of Cr (VI) ion was up to 78%. Finally, comparison of Cr (VI) adsorption capacity of the developed adsorbent with commercial activated carbon demonstrated its higher performance. Korean Institute of Chemical Engineers, Seoul, Korea, 2013 Cr (VI) nationallicence Adsorption Isotherm nationallicence Activated Carbon nationallicence Kinetics nationallicence Thermodynamics nationallicence Activated Sludge nationallicence Gorzin Fatemeh Department of Chemical Engineering, Babol University of Technology, Babol, Iran aut Ghoreyshi Ali Department of Chemical Engineering, Babol University of Technology, Babol, Iran aut Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/8(2013-08-01), 1594-1602 0256-1115 30:8<1594 2013 30 11814 https://doi.org/10.1007/s11814-013-0079-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11814-013-0079-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gorzin Fatemeh Department of Chemical Engineering, Babol University of Technology, Babol, Iran aut NATIONALLICENCE 700 1- Ghoreyshi Ali Department of Chemical Engineering, Babol University of Technology, Babol, Iran aut NATIONALLICENCE 773 0- Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/8(2013-08-01), 1594-1602 0256-1115 30:8<1594 2013 30 11814 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer