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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/3008
Title: Equilibrium and kinetic studies for the adsorption of Mn(II) and Co(II) from aqueous medium using Agar-Agar as sorbent
Authors: Gupta B.
Begum I. Z.
Rajput G.
Published in: Chemical Engineering Communications
Abstract: An extensive increase in industrial activities and environmental accidents in recent years have greatly contributed to increasing metal pollution in water resources, thereby causing threats to terrestrial as well as aquatic life. The toxicity of metal pollution is slow and long lasting, as these metal ions are nonbiodegradable. The most appropriate solution for controlling the biogeochemistry of metal contaminants to produce high-quality treated effluents from polluted wastewaters is sorption technique. Agar-agar, a readily available seaweed, was used as sorbent for the removal of Mn(II) and Co(II) from aqueous media. Batch experiments were performed to study adsorption as a function of process parameters: sorption time, initial pH, concentration of sorbate and sorbent. The Freundlich model fitted best with the experimental equilibrium data between the two adsorption isotherm models tested. The kinetic data correlated well with the Lagergren pseudo-second-order kinetic model for the sorption of both Mn(II) and Co(II) using agar-agar. Adsorbed metal ions were quantitatively recovered from the spent adsorbent using 5.0 mol L-1 HCl. The efficiency of agar-agar for decontaminating Mn(II) and Co(II) from electroplating effluent has also been evaluated. The results proved agar-agar to be a favorable adsorbent to remove and recover Mn(II) and Co(II) from waste effluent for further use in diversified industrial applications.
Citation: Chemical Engineering Communications (2008), 195(10): 1200-1212
URI: https://doi.org/10.1080/00986440801905114
http://repository.iitr.ac.in/handle/123456789/3008
Issue Date: 2008
Keywords: Adsorption
Agar-agar
Cobalt(II)
Desorption
Electroplating industrial effluent
Equilibration
Kinetics
Manganese(II)
ISSN: 986445
Author Scopus IDs: 7402195167
55665390800
35786509000
Author Affiliations: Gupta, B., Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India
Begum I., Z., Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India
Rajput, G., Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India
Funding Details: The financial support to one of the authors provided by the Ministry of Human Resource and Development (MHRD), New Delhi, India is gratefully acknowledged.
Corresponding Author: Gupta, B.; Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India
Appears in Collections:Journal Publications [CY]

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