Preparing hierarchical nanoporous ZSM-5 zeolite via post-synthetic modification of zeolite synthesized from bagasse and its application for removal of Pb2+
Journal Title: Eurasian Chemical Communications - Year 2019, Vol 1, Issue 0
Abstract
In this study, hierarchical H-ZSM-5 zeolite is prepared via post-synthetic modification of parent H-ZSM-5 zeolite (Si/Al=35) synthesized from bagasse (BGA) as silica source using desilication with alkaline treatment (AT). For optimizing the effective parameters on desilication, Taguchi method was utilized. Cultivated BGA in the south of the Caspian Sea (Mazandaran province, Iran) is applied for extracting silica powder and used in the synthesis of zeolite. In this work, two responses have been considered. The First and the second responses are the maximum amounts of extracted silicone and the removal of Pb2+ % from aqueous solutions, respectively. For this purpose, the effect of four important factors with three selected levels including; concentration of NaOH solution (0.1, 0.2 and 0.5 M), temperature (25, 55 and 85 Cº), time of reflux (30, 60 and 120 min) and molar ratio of TMAOH/ NaOH (0.5, 1 and 1.5) are studied on both of the responses. TMAOH was defined as tetra methyl ammonium hydroxide. According to Taguchi method, the optimum conditions for both responses are concluding as Concentration of NaOH solution=0.2 M, temperature =55 Cº, time of reflux=120 min and molar ratio of TMAOH/ NaOH=0.5. The results display that Concentration of NaOH solution in comparison to other factors is the most effective one in both responses. Also, AT-05-ZSM-5 is selected as the optimum zeolite with volumes 278.13 ppm and 90.2 % with S/N ratios 48.878 and 39.097 for the first and the second responses, respectively. Parent H-ZSM-5 and AT-05-ZSM-5 are characterized by x-ray diffraction (XRD), scanning electronic microscopy (SEM), Fourier transform infra-red (IR), Brunauer–Emmett–Teller (BET), Barrett-Joyner-Halenda (BJH) and inductively coupled plasma-optical emission spectrometery (ICP-OES). AT-05- ZSM-5 demonstrates a limit and uniform meso-pore average size distribution at 7.65 nm using alkaline treatment.
Authors and Affiliations
Sedigheh Rostami, Seyed Naser Azizi, Neda Asemi
Keywords
Related Articles
- EP ID EP658073
- DOI 10.33945/SAMI/ECC.2019.1.2
- Views 227
- Downloads 0
Biosynthesis and characterization of silver nanoparticles: A thymbra spicataL extract approach and study of their antibacterial and antifungal activity
In this study, at first, the biosynthesis of silver nanoparticles (Ag NPs) using an aqueous extract of Thymbra spicataL was studied and then, the shape and size of synthesized NPs were characterized by different analysis...
Photosensitizing properties for porphyrazine and some derivatives
Time-dependent density functional theory (TD-DFT) calculations were performed to study photosensitizing properties for porphrazine and eleven of its related derivatives. Two model categories have been considered based on...
Green synthesis and characterization of silver nanoparticles using Scrophularia Striata extract
Here, green synthesis of silver nanoparticles (NPs) using aqueous extract of Scrophularia Striata was demonstrated. In order to obtain the best formation conditions of NPs, different physicochemical parameters such as vo...
Catalytic application of 3-methyl-1-sulfonic acid imidazolium tetrachloroferrate as nanostructured catalyst on the cross-aldol condensation reaction of cycloalkanones with aldehydes
3-methyl-1-sulfonic acid imidazolium tetrachloroferrate {[Msim]FeCl4} as an efficient sulfur catalyst was prepared and applied, as an efficient catalyst, for the cross-aldol condensation reaction between cycloalkanones a...
Synthesis, characterization, antibacterial activity and molecular modeling studies of Ni(II) and Zn(II) complexes with phenylpyridylformamidine ligand
he Ni(II) and Zn(II) complexes with phenylpyridylformamidine (PhPyF) ligand, [Ni(PhPyF)Cl2] and [Zn(PhPyF)Cl2], have been prepared and investigated using different chemical techniques such as elemental analysis, molar co...