Sorption of cadmium and nickel from solution by peat and modified peat

Prativadi Bayankara, Srinivas (2003) Sorption of cadmium and nickel from solution by peat and modified peat. Masters thesis, Memorial University of Newfoundland.

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    Available under License - The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission.
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Abstract

The performance of peat and modified peat in the remediation of wastewater containing cadmium (Cd) and nickel (Ni) was investigated in both batch and continuous process. Peat is an attractive natural sorbent because it is widespread and inexpensive. The sorption capacity can be determined using Langmuir and Freundlich isotherms. The batch sorption results showed that sulfuric acid treatment (STP) enhances the sorption capacity of the peat. Temperature, concentration of metals and time influences the sorption process. Breakthrough curves for cadmium and nickel were evaluated for several column characteristics: the height of the exchange zone, time taken by the exchange zone to travel its own height and rate of movement of the exchange zone. The column showed a better performance at lower concentration when compared to higher concentrations of cadmium and nickel. From the infrared (IR) measurements the difference in the antisymmetrical and symmetrical stretching of carboxylic group of peat confirms an unidentate complex with Ni and Cd.

Item Type: Thesis (Masters)
URI: http://research.library.mun.ca/id/eprint/6973
Item ID: 6973
Additional Information: Bibliography: leaves 84-92.
Department(s): Science, Faculty of > Environmental Science
Date: 2003
Date Type: Submission
Library of Congress Subject Heading: Cadmium--Absorption and adsorption; Nickel--Absorption and adsorption; Adsorption; Peat; Hazardous waste site remediation

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