title: Removal of copper, nickel, cobalt and manganese from aqueous solution by kaolinite.
abstract: The removal of some heavy metals such as Mn(II), Co(II), Ni(II), and Cu(II) from aqueous solution is studied using a raw kaolinite. The sorption of these metals on kaolinite conformed to linear form of Langmuir adsorption equation. Langmuir C(m) constants for each metal were found as 0.446 mg/g (Mn), 0.919 mg/g (Co), 1.669 mg/g (Ni), 10787 mg/g (Cu) at 25 degrees C, respectively. Also, kinetic and thermodynamic parameters such as enthalpy (deltaH), free energy (deltaG) and entropy (deltaS) were calculated and these values show that adsorption of heavy metal on kaolinite was an endothermic process and the process of adsorption was favoured at high temperatures.
authors.affiliation: Department of Chemistry, Faculty of Sciences & Arts, Dicle University, 21280 Diyarbakir, Turkey. omer@dicle.edu.tr
authors.forename: Omer
authors.initials: O
authors.lastname: Yavuz
authors.forename: Yalçin
authors.initials: Y
authors.lastname: Altunkaynak
authors.forename: Fuat
authors.initials: F
authors.lastname: Güzel
mesh_terms: D000327:Adsorption; D003035:Cobalt / Q000302:isolation & purification*; D003300:Copper / Q000302:isolation & purification*; D007616:Kaolin / Q000737:chemistry*; D007700:Kinetics; D008345:Manganese / Q000302:isolation & purification*; D009532:Nickel / Q000302:isolation & purification*; D012996:Solutions / Q000737:chemistry; D013997:Time Factors; D018508:Water Purification / Q000379:methods*
chemical_list: D012996:Solutions; D007616:Kaolin; D003035:Cobalt; D008345:Manganese; D003300:Copper; D009532:Nickel