title: Sorption characteristics of Cu(II) ions onto silica gel-immobilized calix[4]arene polymer in aqueous solutions: batch and column studies.
abstract: In the present study, Cu(II) removal from aqueous solutions by sorption was investigated. Aminopropyl silica gel-immobilized calix[4]arene polymer (APSIC[4]P) was used in sorption as sorbent. During the experimental part of this study, the effect of parameters, such as pH, initial Cu(II) concentration, temperature on Cu(II) removal was observed. In addition, sorption isotherm studies and column studies were made. Maximum Cu(II) removal was obtained at pH 6 and 25 degrees C. In the isotherm studies, Langmuir and Freundlich isotherm models were applied and it was determined that the experimental data confirmed to Langmuir isotherm model. Batch sorption capacity (q0) was calculated as 5.08 mg/g. The capacity value for column study was obtained by graphical integration as 1.14 mg/g. The Thomas and the Yoon-Nelson models were applied to experimental data to predict the breakthrough curves and to determine the characteristics parameters of the column useful for process design.
authors.affiliation: Selçuk University, Department of Chemical Engineering, 42075 Konya, Turkey. mtabakci@selcuk.edu.tr
authors.forename: Mustafa
authors.initials: M
authors.lastname: Tabakci
authors.forename: Mustafa
authors.initials: M
authors.lastname: Yilmaz
mesh_terms: D000327:Adsorption; D047250:Calixarenes / Q000032:analysis / Q000737:chemistry*; D002623:Chemistry Techniques, Analytical / Q000379:methods; D003300:Copper / Q000032:analysis* / Q000737:chemistry / Q000302:isolation & purification*; D006863:Hydrogen-Ion Concentration; D007477:Ions; D007700:Kinetics; D008956:Models, Chemical; D015233:Models, Statistical; D010636:Phenols / Q000032:analysis / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry; D012822:Silicon Dioxide / Q000032:analysis*; D013696:Temperature; D014867:Water / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification
chemical_list: D007477:Ions; D010636:Phenols; D011108:Polymers; D014874:Water Pollutants, Chemical; C121325:calix(4)arene; D014867:Water; D047250:Calixarenes; D012822:Silicon Dioxide; D003300:Copper