Volume 30, Issue 1 (spring 2026)
jwss 2026, 30(1): 13-31 |
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Mirghaffari N, Soleimani M, tayebi A. Using Clinoptilolite Natural Zeolite in the Removal of Methylene Blue and Disperse Red 60 from Aqueous Solutions.. jwss 2026; 30 (1) :13-31
URL: http://jstnar.iut.ac.ir/article-1-4491-en.html
URL: http://jstnar.iut.ac.ir/article-1-4491-en.html
Department of Natural Resources, Isfahan University of Technology, Isfahan, Iran. , mnorolah@iut.ac.ir
Abstract: (126 Views)
As the industry expands and water resources decline, attention has increasingly focused on the treatment and recycling of wastewater generated by various industrial processes. Adsorption using cost-effective and readily available adsorbents is a simple and low-cost method for wastewater treatment in various industrial sectors. In this study, clinoptilolite natural zeolite (CNZ) was employed for the removal of two dye pollutants: cationic methylene blue and disperse red 60. To evaluate the efficiency of CNZ, four variables, pH, contact time, adsorbent dosage, and initial dye concentration, were investigated using response surface methodology. Based on the results obtained from batch experiments, the maximum removal efficiencies of methylene blue and disperse red 60 by CNZ were 98.9% and 78.7%, respectively. These optimal removal percentages were achieved under the following conditions: a contact time of 120 minutes, an initial dye concentration of 50 mg/L, an adsorbent dosage of 20 g/L, and a pH of 10 for methylene blue and a pH of 4 for disperse red 60. The pseudo-second-order kinetic model, with an R² value greater than 0.90, exhibited the best fit for the adsorption of both dyes from aqueous solutions. Furthermore, the extent of dye adsorption exhibited a better correlation with the Langmuir (Disperse Red 60) and the Freundlich (Methylene Blue) adsorption isotherms. Results of column experiments demonstrated that the maximum adsorption capacities for Methylene Blue and Disperse Red 60 were 97.7 and 45.9 mg/g, respectively. The results revealed the high potential of CNZ as a sorbent for cationic dye pollutants from industrial wastewaters.
Keywords: Textile industry, Wastewater treatment, Adsorption, Cationic dyes, Response surface method.
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