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 220
- Downloads 0
The effect of magnetic field on the magnetic property of Agar/Fe3O4 nanocomposite
Agar/Fe3O4 nanocomposites were synthesized in the presence of an external magnetic field (~ 0.4 Tesla) and their characteristics were compared with the samples synthesized without considering the external magnetic field....
QSAR models to predict physico-chemical Properties of some barbiturate derivatives using molecular descriptors and genetic algorithm- multiple linear regressions
In this study the relationship between choosing appropriate descriptors by genetic algorithm to the Polarizability (POL), Molar Refractivity (MR) and Octanol/water Partition Coefficient (LogP) of barbiturates is studied....
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...
Development of ultrasound-assisted emulsification microextraction for the determination of trace zinc and copper by flame atomic absorption spectrometry
In this work, we developed a method based on ultrasound-assisted emulsification microextraction (USAEME) for the determination of zinc and copper by flame atomic absorption spectrometry (FAAS). The method is based on the...
Effect of carbon black and fly ash co-fillers content on mechanical and thermal behaviors of styrene butadiene rubber compounds
Fly ash (FA) is produced as a waste byproduct during the burning process of coal in thermal power plants whose cost is primarily associated to cleaning and transportation. It possesses mechanical properties on account of...