title: The sorption of copper on almond shell: optimization and kinetics.
abstract: Batch sorption studies using almond shell as an sorbent for the removal of Cu (II) from aqueous solutions, showed that copper removal decreased from 74.9% to 45.6% with increasing its concentration from 10 to 70 ppm. The removal increased with increasing sorbent dose and pH, respectively. Copper removal was obtained equal to 63.7%, 69.6% and 58.6% at 26˚C, 40˚C and 55˚C. The sorption of Cu (II) on almond shell was also optimized by Taguchi method. The optimized conditions were the sorbent mass of 4 g, the ion initial concentration of 10 ppm, pH 7, the temperature of 40˚C and contact time equal to 60 min. The pH and initial Cu (II) concentration with respectively 32.75% and 31.20% contribution had more influence on the removal of Cu (II). The kinetic data fit pseudo-second-order model with correlation coefficients greater than 0.99 and rate constants in the range of 0.26-7.87 g mg(-1) min(-1).
authors.affiliation: Department of Applied Chemistry, University of Tabriz, Tabriz, Iran. soheil_aber@yahoo.com
authors.forename: S
authors.initials: S
authors.lastname: Aber
authors.forename: D
authors.initials: D
authors.lastname: Salari
authors.forename: B
authors.initials: B
authors.lastname: Ayoubi Feiz
mesh_terms: D000327:Adsorption; D003300:Copper / Q000737:chemistry*; D003627:Data Interpretation, Statistical; D004305:Dose-Response Relationship, Drug; D052918:Environmental Restoration and Remediation / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D027861:Prunus / Q000737:chemistry*; D013696:Temperature; D014865:Waste Disposal, Fluid / Q000379:methods*; D018508:Water Purification / Q000379:methods*
chemical_list: D003300:Copper