Synthesis of Sodalite Zeolite to Treatment of Textile Effluents

Abstract

Textile dye industry causes environmental impacts due to inappropriate disposal of effluents. Several processes have been studied to effective treatment in the dye removal, one of the main molecular sieves (zeolites). The zeolite material, especially sodalite, has the ability to adsorb the metals and functional chromophore groups. Therefore, the sodalite has characteristics that have attention to the scientific community for the treatment of textile effluents. The aim of this work was to synthesize and evaluate the use of sodalite zeolite in four Si/Al ratios (1.0, 1.5, 2.0 and 2.5) and to test the adsorption capacity in the presence of violet crystal textile dye. As result, the synthesized zeolites presented a characteristic that places them in the adsorbent materials. Among the techniques used for characterization, we have the mean pore diameter between 1.65 and 2.07 nm. X-ray diffraction revealed crystalline phases as sodalite zeolite with the presence of kaolinite, mullite, and quartz. Cation-exchange-capacity was between 0.8871 to 1.017 meq/g, where it had a 14.65% increase of the 2.5-SOD sample. The dye adsorption process was reduced to 12% (44 mg/L). Thus, it has concluded that the obtained sodalite zeolites have potential in the effective removal of dyes from the textile industry.

Synthesis of Sodalite Zeolite and Adsorption Study of Crystal Violet Dye

“…In this process, sodalite acts as an ionic adsorbent agent capable of removing toxic heavy metal cations and ions from textile industry effluents. 2 The removal of heavy metals using the sodalite zeolite, with metakaolin as precursor, is considered a multi-stage reaction containing liquid phase dissolution and crystallization processes and solid phases. 53 The alkaline transformation that occurs with metakaolin in molecular sieves provides an alternative solution for the sustainability of the use of mineral clay for water decontamination.…”

“…1 With the growing success of the textile industry across the world, industries have started investing more in dyes with specific properties. 2 Currently there are more than eight thousand synthetic dyes, associated with the textile market. 3,4 It has been noted that approximately 15% of the world's overall production of dyes is lost to the environment during their synthesis, processing or application in various industrial operations.…”

“…Crystal violet (CV) is also known as basic violet 3, gentian violet, and methyl violet 10B. 2 Its IUPAC name is N- [4-[bis[4-dimethylamino)-phenyl]-methylene]-2,5cyclohexadien-1-ylidine]-N-methylmethanaminium chloride (molecular formula C 25 H 30 N 3 Cl and molecular weight 407.98) and belongs to the class of triarylmethane dyes. 9,13 Aluminosilicates such as clays, zeolites, bentonite, and montmorillonite are the most commonly used low-cost adsorbents for environmental applications.…”

“…The cation exchange properties of zeolites have been used for various environmental purposes, such as removal dyes in effluent from the textile industry. 2 Among the z E-mail: sdasgupta@iitb.ac.in various types of effluent treatments, the adsorption technique using zeolitic materials (molecular sieves) has been successfully employed in effective dye removal. [15][16][17][18][19][20][21][22] Zeolites are basically hydrated aluminosilicates of alkali and alkaline earth metals (composed mainly of Na, K, Mg and Ca), which are structured in three-dimensional crystalline networks.…”

Synthesis of ZSM-5 Zeolite from Metakaolin and Rice Husk Ash to CO2 Adsorption

“…Fourteen tetrahedrons combine to form a sub-unit (called the Pentasil Unit) with eight pentagonal faces. [34][35][36][37] The pentagonal sub-units exhibit linear bonding which results in the formation of chains stretched along the z-axis. 38 The properties of ZSM-5 depend on the crystalline structure, uniform size and acidity of the channels.…”