Adsorption of Malachite Green with Sodium Dodecylbenzene Sulfonate Modified Sepiolite: Characterization, Adsorption Performance and Regeneration

Jian Yu, Lirong Zhang and Bin Liu
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Jian Yu: Department of Water Engineering and Science, College of Civil Engineering, Hunan University, Changsha 410082, China
Lirong Zhang: 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

IJERPH, 2019, vol. 16, issue 18, 1-14

Abstract: The adsorption of malachite green (MG) onto sodium dodecylbenzene sulfonate (SDBS)-modified sepiolite was investigated with respect to pH, oscillation rate, MG dosage and adsorbent dosage. The modification condition and modified sepiolite characterization were examined. The conditions of 100% cation exchange capacity (CEC), pH value of 9, contact time of 60 min and 25 °C were deemed as the optimal conditions. The interlayer spacing of sepiolite was expanded and the surface hydrophobicity improved due to the entering of SDBS into the interlayer structure of the sepiolite ore. This is probably the reason for its adsorption enhancement. The adsorption of malachite green by organic sepiolite is in line with the quasi-secondary kinetic model. The results from the regeneration procedure suggest that a superior regeneration property obtained with 0.2 mol/L HCl concentration.

Keywords: malachite green; sodium dodecylbenzene sulfonate; sepiolite; organically modification; adsorption (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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