Document Type : Research Article
Authors
1
Department of Chemistry, College of Basic Sciences, Yadegar-e- Imam Khomeini (RAH) Shahre Ray Branch, Islamic Azad University, Tehran, Iran
2
Research Center for New Technologies in Chemistry and Related Sciences, Yadegar-e-Imam Khomeini (RAH) Shahre Rey Branch, Islamic Azad University, Tehran, Iran
3
Department of Chemical Technologies, Iranian Research Organization for Science and Technology (IROST), Tehran, Iran
Abstract
The effective elimination of dyes from the aquatic environment is one of the serious environmental goals. Herein we describe the synthesis (by the Mechanochemical Method), and application of a catalyst zeolitic-imidazolate framework (ZIF-8) for the impressive removal of various types of dyes such as Remazol golden yellow RNL(RD1), Blue94(RD2), Red141(RD3), Violet-5r(RD4), Red66(RD5), Red195(RD6), Red120(RD7), Yellow160(RD8), Yellow176(RD9) in the wastewaters through the adsorption process. The effects of temperature, pH, dye concentration, contact time, and adsorption dose on the adsorption process were investigated and optimized. The isotherm models were studied through four-parameter equations, Freundlich, Langmuir, Tepmkin, and Dubinin-Radushkevich. The adsorption isotherm data showed the Langmuir model was the consistent model. The COD and BOD in the real sample were determined in the presence of the catalyst, and results show the values of BOD and COD were significantly reduced. The structure of the synthesized catalyst was characterized by various techniques including FTIR, SEM, XRD, specific surface area, and BET. The high adsorption capacity, reusability, and recyclability of the catalyst were some of the advantages of the prepared catalyst.
This catalyst was utilized as an efficient adsorbent for the removal of dyes from textile wastewater. The observed results show a significant reduction in BOD and COD using the prepared catalyst
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