Fast and efficient mesoporous adsorbents for the separation of toxic compounds from aqueous media.
The effect of cationic template on the adsorption of chromium (VI), furfural and copperphthalocyanine-3,4',4'',4'''-tetrasulfonic acid tetrasodium salt (CuPc) in MCM-41 and MCM-48 mesoporous materials was investigated in this work. We used cetyltrimethylammonium bromide (CTAB) as the cationic template and sodiummetasilicate (for MCM-41) and tetraethyl-orthosilicon (for MCM-48) as the silica source for the synthesis of mesoporous materials. The properties of synthesized samples were characterized with XRD-low angle, SEM, N(2) adsorption-desorption and TG-DT analysis. The extent of adsorption was investigated as a function of solution pH, shaking speed, contact time, analyte concentration, reaction temperature and supporting electrolyte (sodium chloride) concentration. Langmuir and Freundlich isotherms were used to model the adsorption equilibrium data. The as-synthesized mesoporous samples showed very high adsorption capacity for the analytes and adsorption uptakes were rapid on the adsorbents reaching equilibrium in less than 2 h. The materials without surfactant did not show significant affinity for the analytes.
Anbia
Mansoor
M
Research Laboratory of Nanoporous Materials, Faculty of Chemistry, Iran University of Science and Technology, Farjam Street, Narmak, Tehran 16846, Iran. anbia@iust.ac.ir
Mohammadi
Nourali
N
Mohammadi
Kaveh
K
D000327:Adsorption; D002857:Chromium / Q000302:isolation & purification*; D004396:Coloring Agents / Q000302:isolation & purification*; D005662:Furaldehyde / Q000302:isolation & purification*; D007211:Indoles / Q000302:isolation & purification*; D007700:Kinetics; D009942:Organometallic Compounds / Q000302:isolation & purification*; D016062:Porosity; D013501:Surface-Active Agents; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods
D004396:Coloring Agents; D007211:Indoles; D009942:Organometallic Compounds; D013501:Surface-Active Agents; D014874:Water Pollutants, Chemical; D002857:Chromium; C015445:copper phthalocyanine; D005662:Furaldehyde