naa a22 4500 510819877 CHVBK 20180411083526.0 cr unu---uuuuu 180411e20131201xx s 000 0 eng 10.1007/s11814-013-0178-5 doi (NATIONALLICENCE)springer-10.1007/s11814-013-0178-5 Adsorption of heavy metal ions in ternary systems onto Fe(OH)3 [Elektronische Daten] [Syed Mustafa, Muhammad Irshad, Muhammad Waseem, Khizar Shah, Umer Rashid, Wajid Rehman] The adsorption behavior of amorphous Fe(OH)3 has been studied in multicomponent metal system. The metal ions uptake in the ternary system is lower than in the single system, suggesting that certain sites on the surface of the solid are blocked due to competition. The selectivity trend in the ternary system is observed to be Ni2+>Zn2+>Cd2+ which is, however, lost with increase in the temperature of the aqueous solution. Further, the observed selectivity trend is neither related to electronegativity of the metal ions nor to the pH of the hydrolysis, but has been found dependent on charge to radius ratio. The metal ions adsorption is found to increase with pH, while the converse is true with the rise in temperature. The uptake of metal ions data has been interpreted in terms of stoichiometry, binding constants and adsorption capacities. The negative values of ΔG show that uptake of metal ions is favored at lower temperatures, indicating that the adsorption mechanism essentially remains ion exchange in nature. Korean Institute of Chemical Engineers, Seoul, Korea, 2013 Ternary System nationallicence Metal Adsorption nationallicence Modeling nationallicence Thermodynamic Parameters nationallicence Mustafa Syed National Centre of Excellence in Physical Chemistry, University of Peshawar, 25120, Peshawar, Pakistan aut Irshad Muhammad National Centre of Excellence in Physical Chemistry, University of Peshawar, 25120, Peshawar, Pakistan aut Waseem Muhammad Department of Physics, Comsats Institute of Information Technology, P. O. Box 44000, Islamabad, Pakistan aut Shah Khizar National Centre of Excellence in Physical Chemistry, University of Peshawar, 25120, Peshawar, Pakistan aut Rashid Umer Department of Chemistry, Hazara University, 21300, Mansehra, Pakistan aut Rehman Wajid Department of Chemistry, Hazara University, 21300, Mansehra, Pakistan aut Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/12(2013-12-01), 2235-2240 0256-1115 30:12<2235 2013 30 11814 https://doi.org/10.1007/s11814-013-0178-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11814-013-0178-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mustafa Syed National Centre of Excellence in Physical Chemistry, University of Peshawar, 25120, Peshawar, Pakistan aut NATIONALLICENCE 700 1- Irshad Muhammad National Centre of Excellence in Physical Chemistry, University of Peshawar, 25120, Peshawar, Pakistan aut NATIONALLICENCE 700 1- Waseem Muhammad Department of Physics, Comsats Institute of Information Technology, P. O. Box 44000, Islamabad, Pakistan aut NATIONALLICENCE 700 1- Shah Khizar National Centre of Excellence in Physical Chemistry, University of Peshawar, 25120, Peshawar, Pakistan aut NATIONALLICENCE 700 1- Rashid Umer Department of Chemistry, Hazara University, 21300, Mansehra, Pakistan aut NATIONALLICENCE 700 1- Rehman Wajid Department of Chemistry, Hazara University, 21300, Mansehra, Pakistan aut NATIONALLICENCE 773 0- Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/12(2013-12-01), 2235-2240 0256-1115 30:12<2235 2013 30 11814 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer