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Adsorption of Acid Orange Ⅱ with Two Step Modified Sepiolite: Optimization, Adsorption Performance, Kinetics, Thermodynamics and Regeneration

Author

Listed:
  • Jian Yu

    (Department of Water Engineering and Science, College of Civil Engineering, Hunan University, Changsha 410082, China)

  • Wenting He

    (Department of Water Engineering and Science, College of Civil Engineering, Hunan University, Changsha 410082, China)

  • Bin Liu

    (Department of Water Engineering and Science, College of Civil Engineering, Hunan University, Changsha 410082, China
    Department of Chemical Engineering, Process Engineering for Sustainable Systems (ProcESS), KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium)

Abstract

In this study, a two-step modification of sepiolite for adsorption enhancement was investigated. The cetyltrimethylammonium bromide (CTAB) was utilized for the organic modification process after a heat modification. To develop the optimal modification condition, adsorption of Acid Orange II onto modified sepiolite was investigated with respect to heat temperature and adsorbent dosage. The temperature of 200 °C and 100% cation exchange capacity (CEC) was deemed as the optimal condition. The impacts of operation conditions on adsorption procedure, including pH, adsorbent dosage and adsorption duration, were comprehensively discussed. The adsorption of Acid Orange II by sepiolite is in accordance with the quasi-secondary kinetic model. Moreover, the results of intraparticle diffusion indicate that the intraparticle diffusion was the dominant adsorption force in the initial adsorption period. The adsorption process was obeyed with the Langmiur adsorption model. The results from regeneration procedure suggest that the superior regeneration obtained with 0.8 mol/L NaOH concentration.

Suggested Citation

  • Jian Yu & Wenting He & Bin Liu, 2020. "Adsorption of Acid Orange Ⅱ with Two Step Modified Sepiolite: Optimization, Adsorption Performance, Kinetics, Thermodynamics and Regeneration," IJERPH, MDPI, vol. 17(5), pages 1-14, March.
    • Handle: RePEc:gam:jijerp:v:17:y:2020:i:5:p:1732-:d:329274
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    References listed on IDEAS

    as
    1. Zhenghua Wang & Lina Liao & Andrew Hursthouse & Na Song & Bozhi Ren, 2018. "Sepiolite-Based Adsorbents for the Removal of Potentially Toxic Elements from Water: A Strategic Review for the Case of Environmental Contamination in Hunan, China," IJERPH, MDPI, vol. 15(8), pages 1-15, August.
    2. Jian Yu & Hao Shen & Bin Liu, 2020. "Adsorption Properties of Polyethersulfone-Modified Attapulgite Hybrid Microspheres for Bisphenol A and Sulfamethoxazole," IJERPH, MDPI, vol. 17(2), pages 1-14, January.
    3. Jian Yu & Lirong Zhang & Bin Liu, 2019. "Adsorption of Malachite Green with Sodium Dodecylbenzene Sulfonate Modified Sepiolite: Characterization, Adsorption Performance and Regeneration," IJERPH, MDPI, vol. 16(18), pages 1-14, September.
    4. Patrick Nugent & Youssef Belmabkhout & Stephen D. Burd & Amy J. Cairns & Ryan Luebke & Katherine Forrest & Tony Pham & Shengqian Ma & Brian Space & Lukasz Wojtas & Mohamed Eddaoudi & Michael J. Zaworo, 2013. "Porous materials with optimal adsorption thermodynamics and kinetics for CO2 separation," Nature, Nature, vol. 495(7439), pages 80-84, March.
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