Evans blue removal from wastewater by rarasaponin-bentonite

The feasibility of natural bentonite and rarasaponin-bentonite for Evans blue removal from aqueous solution was studied. Rarasaponin is a natural surfactant obtained from Sapindus rarak DC was used as modifying agent for natural bentonite modification. Adsorption experiments were conducted in a batc...

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Bibliographic Details
Published in:International journal of environmental science and technology (Tehran) 2013-03, Vol.10 (2), p.359-370
Main Authors: Chandra, I.K, Ju, Y.-H, Ayucitra, A, Ismadji, S
Format: Article
Language:English
Subjects:
Adsorption
Aquatic Pollution
Aqueous solutions
Bentonite
Earth and Environmental Science
Ecotoxicology
Environment
Environmental Chemistry
Environmental Science and Engineering
Modification
Modifications
Original Paper
Rarasaponin
Sapindus
Soil Science & Conservation
Surfactants
Waste Water Technology
Water Management
Water Pollution Control
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Summary:The feasibility of natural bentonite and rarasaponin-bentonite for Evans blue removal from aqueous solution was studied. Rarasaponin is a natural surfactant obtained from Sapindus rarak DC was used as modifying agent for natural bentonite modification. Adsorption experiments were conducted in a batch system at various temperatures. Several temperature-dependent isotherm models (Langmuir, Freundlich, Sips and Toth) were used to represent equilibrium data. It was found that Toth model represents the adsorption equilibrium data better than other models. Kinetic data were best represented by the pseudo-first order model. The controlling mechanism of the adsorption of Evans blue onto natural bentonite and rarasaponin-bentonite was physical adsorption.
ISSN:1735-1472
1735-2630
DOI:10.1007/s13762-012-0114-y