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Adsorptive Removal of Reactive Black 5 from Wastewater Using Bentonite Clay: Isotherms, Kinetics and Thermodynamics

Author

Listed:
  • Muhammad Tahir Amin

    (Alamoudi Water Research Chair, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia)

  • Abdulrahman Ali Alazba

    (Alamoudi Water Research Chair, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia)

  • Muhammad Shafiq

    (Alamoudi Water Research Chair, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia)

Abstract

The studies of the kinetics and isotherms adsorption of the Reactive Black 5 (RB5) onto bentonite clay were explored in a batch study in a laboratory. The maximum RB5 adsorption conditions of bentonite clay were optimized such as shaking speed (100 rpm), temperature (323 K), pH (10), contact time (40 min), initial dye concentration (170 mg·L −1 ), and particle size (177 µm). The adsorbent surface was characterized using Fourier Transform Infrared Spectroscopy spectroscopy. The mechanisms and characteristic parameters of the adsorption process were analyzed using two parameter isotherm models which revealed the following order (based on the coefficient of determination): Harkin-Jura (0.9989) > Freundlich (0.9986) and Halsey (0.9986) > Langmuir (0.9915) > Temkin (0.9818) > Dubinin–Radushkevich (0.9678). This result suggests the heterogeneous nature of bentonite clay. Moreover, the adsorption process was chemisorption in nature because it follows the pseudo-second order reaction model with R 2 value of 0.9998, 0.9933 and 0.9891 at 25, 75 and 100 mg·L −1 RB5 dye in the solution, respectively. Moreover, based on the values of standard enthalpy, Gibbs free energy change, and entropy, bentonite clay showed dual nature of exothermic and endothermic, spontaneous and non-spontaneous as well as increased and decreased randomness at solid–liquid interface at 303–313 K and 313–323 K temperature, respectively.

Suggested Citation

  • Muhammad Tahir Amin & Abdulrahman Ali Alazba & Muhammad Shafiq, 2015. "Adsorptive Removal of Reactive Black 5 from Wastewater Using Bentonite Clay: Isotherms, Kinetics and Thermodynamics," Sustainability, MDPI, vol. 7(11), pages 1-17, November.
    • Handle: RePEc:gam:jsusta:v:7:y:2015:i:11:p:15302-15318:d:59050
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    Citations

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    Cited by:

    1. Muhammad Tahir Amin & Abdulrahman Ali Alazba & Muhammad Shafiq, 2021. "Successful Application of Eucalyptus Camdulensis Biochar in the Batch Adsorption of Crystal Violet and Methylene Blue Dyes from Aqueous Solution," Sustainability, MDPI, vol. 13(7), pages 1-18, March.
    2. Muhammad Hazwan Hamzah & Muhammad Fitri Ahmad Asri & Hasfalina Che Man & Abdulsalam Mohammed, 2019. "Prospective Application of Palm Oil Mill Boiler Ash as a Biosorbent: Effect of Microwave Irradiation and Palm Oil Mill Effluent Decolorization by Adsorption," IJERPH, MDPI, vol. 16(18), pages 1-18, September.
    3. Xinhui Zhan & Liping Xiao & Bing Liang, 2019. "Removal of Pb(II) from Acid Mine Drainage with Bentonite-Steel Slag Composite Particles," Sustainability, MDPI, vol. 11(16), pages 1-17, August.
    4. Xinhui Zhan & Liping Xiao & Bing Liang, 2019. "Experimental Study on the Optimum Preparation of Bentonite–Steel Slag Composite Particles," Sustainability, MDPI, vol. 12(1), pages 1-27, December.
    5. Marcela Bindzarova Gergelova & Zofia Kuzevicova & Slavomir Labant & Stefan Kuzevic & Diana Bobikova & Jozef Mizak, 2020. "Roof’s Potential and Suitability for PV Systems Based on LiDAR: A Case Study of Komárno, Slovakia," Sustainability, MDPI, vol. 12(23), pages 1-22, November.

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