title: Ultrasonic assisted arsenate adsorption on solvothermally synthesized calcite modified by goethite, α-MnO2 and goethite/α-MnO2.
abstract: A highly porous calcium carbonate (calcite; sorbent 1) was used as a support for modification with α-FeOOH (calcite/goethite; sorbent 2), α-MnO2 (calcite/α-MnO2; sorbent 3) and α-FeOOH/α-MnO2 (calcite/goethite/α-MnO2; sorbent 4) in order to obtain a cheap hybrid materials for simple and effective arsenate removal from aqueous solutions. The adsorption ability of synthesized adsorbents was studied as a function of functionalization methods, pH, contact time, temperature and ultrasonic treatment. Comparison of the adsorptive effectiveness of synthesized adsorbents for arsenate removal, under ultrasound treatment and classical stirring method, has shown better performance of the former one reaching maximum adsorption capacities of 1.73, 21.00, 10.36 and 41.94 mg g(-1), for sorbents 1-4, respectively. Visual MINTEQ equilibrium speciation modeling was used for prediction of pH and interfering ion influences on arsenate adsorption.
authors.affiliation: Vinča Institute of Nuclear Sciences, University of Belgrade, PO Box 522, 11001 Belgrade, Serbia. Electronic address: jasmina.markovski@tmf.bg.ac.rs.
authors.forename: Jasmina S
authors.initials: JS
authors.lastname: Markovski
authors.forename: Veljko
authors.initials: V
authors.lastname: Đokić
authors.forename: Milutin
authors.initials: M
authors.lastname: Milosavljević
authors.forename: Miodrag
authors.initials: M
authors.lastname: Mitrić
authors.forename: Aleksandra A
authors.initials: AA
authors.lastname: Perić-Grujić
authors.forename: Antonije E
authors.initials: AE
authors.lastname: Onjia
authors.forename: Aleksandar D
authors.initials: AD
authors.lastname: Marinković
keywords: Adsorption; Arsenate; Calcite; Goethite; Ultrasound; α-MnO(2)