title: Investigating the potential of functionalized MCM-41 on adsorption of Remazol Red dye.
abstract: The modification of MCM-41 was performed with 3-aminopropropyltrimethoxysilane. The structural order and textural properties of the synthesized materials were studied by X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetry/differential thermogravimetry, nitrogen adsorption, and desorption analysis. The adsorption capacity of NH2-MCM-41 was studied with Remazol Red dye. The following parameters were studied in the adsorption process: pH, temperature, adsorbent dosage, and initial concentration. The desorption process was studied in different concentrations of NaOH solutions. The Freundlich isotherm model was found to be fit with the equilibrium isotherm data. Kinetics of adsorption follows the modified Avrami rate equation. The maximum adsorption capacity was estimated to be 45.9 mg g(-1), with removal of the dye of 99.1%. The NH2-MCM-41 material exhibited high desorption capacity with 98.1%.
authors: Department of Chemistry, Federal University of Sergipe, Av. Marechal Rondon s/no, 49100-000 São Cristóvão, Sergipe, Brazil.
authors: Danilo Oliveira
authors: DO
authors: Santos
authors: Maria
authors: M
authors: de Lourdes Nascimento Santos
authors: José Arnaldo Santana
authors: JA
authors: Costa
authors: Roberta Anjos
authors: RA
authors: de Jesus
authors: Sandro
authors: S
authors: Navickiene
authors: Eliana Midori
authors: EM
authors: Sussuchi
authors: Maria Eliane
authors: ME
authors: de Mesquita
mesh_terms: D000327:Adsorption; D004396:Coloring Agents / Q000302:isolation & purification*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D009584:Nitrogen / Q000032:analysis / Q000737:chemistry; D011437:Propylamines / Q000737:chemistry; D012821:Silanes / Q000737:chemistry; D012822:Silicon Dioxide / Q000032:analysis* / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D013818:Thermogravimetry; D014961:X-Ray Diffraction
chemical_list: D004396:Coloring Agents; C509968:MCM-41; D011437:Propylamines; D012821:Silanes; C088294:3-aminopropyltrimethoxysilane; D012822:Silicon Dioxide; D009584:Nitrogen