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Title: Effective oxidative decolourization of azo dyes over Indian Ocean manganese nodules
Authors: Sahoo, A K
Parida, K M
Satapathy, P K
Keywords: Manganese nodules;Degradation;Dye degradation;Decolourization;Methylene blue
Issue Date: Apr-2014
Publisher: NISCAIR-CSIR, India
Abstract: The degradation of cationic dyes such as methylene blue is studied using Indian Ocean manganese nodules. Effect of various parameters, such as catalyst loading, dye concentration, initial pH of the solution, effect of various electrolytes and effect of heat treatment of manganese nodules on the decolourization of methylene blue is investigated. The extent of decolourization decreases with increase in pH and increases in the presence of NaCl. Anions like CO32-, PO43-, Cl- inhibit decolourization, whereas SO42- and NO3- accelerate the decolourization rate of methylene blue to a remarkable extent. The rate of dye degradation is dramatically reduced with increase in calcination temperature.
Page(s): 504-510
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.53A(04-05) [April-May 2014]

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