naa a22 4500 510820069 CHVBK 20180411083527.0 cr unu---uuuuu 180411e20130301xx s 000 0 eng 10.1007/s11814-012-0193-y doi (NATIONALLICENCE)springer-10.1007/s11814-012-0193-y Preconcentration and determination of Cu (II) from aqueous samples using functionalized sawdust and comparison with synthetic functionalized sorbents [Elektronische Daten] [Jasmin Shah, Mohammad Jan, Maria Sadia, Atta-ul-Haq,] The efficiency of indigenous functionalized sorbent (sawdust functionalized with polyaniline) was compared with synthetic functionalized sorbents (Dowex functionalized with 8-hydroxyquinoline (Dowex-8HQ) and α-nitroso-β-naphthol (Dowex-αNβN)) for preconcentration and determination of Cu (II) from aqueous samples. The synthetic functionalized sorbents and indigenous functionalized sorbent were characterized using FTIR. Different parameters like pH, equilibration time and sample volume were investigated for maximum sorption of Cu (II). Isotherm studies showed that the sorption data fitted well into Langmuir isotherm for the sawdust functionalized with polyaniline. Freundlich isotherm was followed for Dowex-8HQ and Dowex-αNβN. Four types of kinetic equations were applied to the data, and it was observed that sorption of Cu (II) followed second-order kinetics. Thermodynamically, the sorption of Cu (II) on these three sorbents was found to be exothermic and spontaneous. For maximum recovery of Cu (II) from loaded sorbents, different parameters like shaking time, eluent type, concentration and volume were investigated, and 89% Cu (II) was recovered from loaded sawdust functionalized with polyaniline and Dowex-8HQ. The interference studies showed the selectivity of sawdust functionalized with polyaniline for Cu (II) in comparison to synthetic functionalized sorbents. Thus, Cu (II) can be easily removed from aqueous samples in the presence of foreign ions. Korean Institute of Chemical Engineers, Seoul, Korea, 2013 Sawdust nationallicence Polyaniline nationallicence Sorption nationallicence Preconcentration nationallicence Shah Jasmin Institute of Chemical Sciences, University of Peshawar, Peshawar, K. P. K., Pakistan aut Jan Mohammad Institute of Chemical Sciences, University of Peshawar, Peshawar, K. P. K., Pakistan aut Sadia Maria Institute of Chemical Sciences, University of Peshawar, Peshawar, K. P. K., Pakistan aut Atta-ul-Haq, Institute of Chemical Sciences, University of Peshawar, Peshawar, K. P. K., Pakistan aut Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/3(2013-03-01), 706-713 0256-1115 30:3<706 2013 30 11814 https://doi.org/10.1007/s11814-012-0193-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11814-012-0193-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Shah Jasmin Institute of Chemical Sciences, University of Peshawar, Peshawar, K. P. K., Pakistan aut NATIONALLICENCE 700 1- Jan Mohammad Institute of Chemical Sciences, University of Peshawar, Peshawar, K. P. K., Pakistan aut NATIONALLICENCE 700 1- Sadia Maria Institute of Chemical Sciences, University of Peshawar, Peshawar, K. P. K., Pakistan aut NATIONALLICENCE 700 1- Atta-ul-Haq Institute of Chemical Sciences, University of Peshawar, Peshawar, K. P. K., Pakistan aut NATIONALLICENCE 773 0- Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/3(2013-03-01), 706-713 0256-1115 30:3<706 2013 30 11814 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer