Cation exchange removal of Pb from aqueous solution by sorption onto NiO.
This paper reports NiO as a novel and an efficient adsorbent for the removal of Pb from aqueous solutions. In the present investigation, Pb adsorption experiments on NiO were conducted on aqueous solution at different initial Pb concentration, pH of the solution and adsorption temperature. The mechanism of adsorption was observed to be an ion exchange between the surface proton and Pb in aqueous solution. Experimental data were best described by the Langmuir isotherms. The surface structure of the NiO before and after adsorption of Pb was analyzed by using FTIR spectroscopy, scanning electron microscopy (SEM) coupled with energy dispersive X-ray analyses (EDX).
Naeem
A
A
National Center of Excellence in Physical Chemistry, University of Peshawar, Peshawar, Pakistan. naeeem64@yahoo.com
Saddique
M T
MT
Mustafa
S
S
Kim
Y
Y
Dilara
B
B
D000327:Adsorption; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D007474:Ion Exchange; D007854:Lead / Q000302:isolation & purification*; D009532:Nickel / Q000737:chemistry*; D012996:Solutions; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods
D007220:Industrial Waste; D012996:Solutions; D014874:Water Pollutants, Chemical; D007854:Lead; D009532:Nickel; C028007:nickel monoxide