Removal of Rhodamine 6G from Industrial Wastewater Using Combination Approach of Adsorption Followed by Sonication

Autor: Parag R. Gogate, Vinod D. Pakhale
Rok vydání: 2021
Předmět:
Zdroj: Arabian Journal for Science and Engineering. 46:6473-6484
ISSN: 2191-4281
2193-567X
Popis: The present work reports a combination approach involving adsorption followed by ultrasonic degradation for the treatment of Rhodamine 6G (R6G) containing wastewater. The main benefit of the combination treatment approach is that adsorption concentrates the effluent which is treated in the subsequent step of ultrasonic degradation in a cost-effective manner based on lower treatment volumes. In the adsorptive removal, INDION 225Na Resin has been used as adsorbent. A study into the effect of different adsorption parameters revealed that the optimum contact time required for the equilibrium was 20 min. It was also established that the optimum values of pH and resin loading for maximum dye removal as 77.6% were 12 and 6 g L−1, respectively. Analysis of different adsorption isotherm models for equilibrium established that the Langmuir model is the best-fitted model with the correlation coefficient value (R2) as 0.99. Similarly, kinetic data analysis revealed that pseudo-second-order model explained the system precisely based on a higher value of R2. For the case of ultrasonic degradation, it was established that a pH of 12 and a temperature of 50 °C were the best treatment conditions. Overall, it was demonstrated that the proposed combination of adsorption and sonication is an efficient approach for the treatment of R6G containing wastewater.
Databáze: OpenAIRE
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