TITLE:
Layered Clay-Alginate Composites for the Adsorption of Anionic Dyes: A Biocompatible Solution for Water/Wastewater Treatment
AUTHORS:
Sanil Sebastian, S. Mayadevi, B. Sajeena Beevi, Sujata Mandal
KEYWORDS:
Layered Clay; Sodium Alginate; Composite; Adsorption; Acid Green 25; Acid Green 27; Isotherm; Kinetics
JOURNAL NAME:
Journal of Water Resource and Protection,
Vol.6 No.3,
February
25,
2014
ABSTRACT:
Adsorption properties
of layered anionic clay-composites for the removal of anionic dyes from water were
studied. The dye adsorption capacities of the composites were higher than the
pristine clay. The clay-alginate composite with 5.9% alginate showed highest
adsorption for both the dyes. The maximum adsorption capacity of the composite
was enhanced by 51% for Acid Green 25 and 160% for Acid Green 27, compared to
the pristine layered clay sample. The adsorption isotherm data were fitted to
the Langmuir, Freundlich and Temkin isotherm models. The isotherm data could be
explained well using the Freundlich isotherm model. Adsorption kinetics was
analyzed using normal first order and Lagergren first order kinetic models.