title: Adsorption of Methyl Blue on Mesoporous Materials Using Rice Husk Ash as Silica Source.
abstract: It is recognized that recycling and reuse of waste can result in significant savings in materials and energy. In this research, the adsorption of methyl blue (MB) using waste rice husk ash (Rha) and mesoporous silica materials made from Rha (R-MCM) were analyzed. Mesoporous silica materials were synthesized using cetyltrimethyl ammonium bromide (CTAB) as a cationic surfactant and Rha as the silica source. The prepared samples were characterized by Brunnaur-Emmet-Teller (BET) adsorption isotherm analyzer and transmission electron microscope (TEM) analysis. The results showed the surface area of R-MCM materials was 1347 m2g-1 and the pore volume was 0.906 cm3g-1. TEM analysis showed that the mesoporous materials generally exhibited ordered hexagonal arrays of mesopores with a uniform pore size. The effects on adsorption performance under different initial dye concentrations, different pH values and different dosages of adsorbent were also studied. Both Langmuir and Freundlich adsorption models were applied to describe the equilibrium isotherms. The results show that the maximum removal efficiency of MB more than 99%.
authors.forename: Nhat Thien
authors.initials: NT
authors.lastname: Nguyen
authors.forename: Shiao-shing
authors.initials: SS
authors.lastname: Chen
authors.forename: Nguyen Cong
authors.initials: NC
authors.lastname: Nguyen
authors.forename: Hau Thi
authors.initials: HT
authors.lastname: Nguyen
authors.forename: Hsiao Hsin
authors.initials: HH
authors.lastname: Tsai
authors.forename: Chang Tang
authors.initials: CT
authors.lastname: Chang
mesh_terms: D000327:Adsorption; D001557:Benzenesulfonates / Q000737:chemistry / Q000302:isolation & purification*; D001673:Biodegradation, Environmental; D060729:Coal Ash / Q000737:chemistry; D008422:Materials Testing; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D058608:Nanopores / Q000648:ultrastructure*; D012275:Oryza / Q000737:chemistry*; D035261:Plant Components, Aerial / Q000737:chemistry; D016062:Porosity; D012822:Silicon Dioxide / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods
chemical_list: D001557:Benzenesulfonates; D060729:Coal Ash; D014874:Water Pollutants, Chemical; D012822:Silicon Dioxide; C414357:Methyl Blue