Document Type : Research Paper

Authors

Wood and Paper Science Department, Faculty of Natural Resources, Sari Agricultural Sciences and Natural Resource University Sari, Iran

Abstract

Industrial wastewater is one of the major environmental pollutants. Many industries effluents, including leather industry, printing, plastics, paper, food industry, cosmetics and industries like these use dyes for dyeing their products and consequently the output wastewaters contain industrial dyes. In this study, Nano zeolite Clinoptilolite modified by Fe3O4 magnetic nanoparticles was used to remove acid green 20 dye in a batch system. In batch absorption studies of acid green 20 dye with Nano zeolite-Fe3O4­, the effect of factors such as pH, initial dye concentration, the amount of absorbent and sorption time was investigated on absorption efficiency in order to determine the optimal conditions for dye removal. In this study, the surface response method (RSM) using Box-Behnken design (BBD) was used to optimize the absorption of acid green 20. The results indicated that Nano zeolite-Fe3O4 is successfully absorbed the acid green 20 dye and has the ability to remove 99.47% of dye from 100 ml of the solution acid green 20 with the concentration of 50 mg/ l in optimal conditions of pH=3, time of 90 minutes and absorbent dose of 0.8 g/l. also, Freundlich and pseudo -second order models had the best fitting with the absorption process as isothermal and kinetic models, respectively. The results showed that the nanocomposite was significantly able to remove the acid green 20 dye from aqueous solutions in a short time. Therefore, it can be used as an effective absorbent to remove dye.

Keywords

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