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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/3354

Title: Dechlorination of chlorophenols by magnesium-silver bimetallic system
Authors: PATEL, U
SURESH, S
Keywords: zero-valent iron
reductive dechlorination
rapid dechlorination
fluidized-bed
pentachlorophenol
biodegradation
dehalogenation
particles
sludge
water
Issue Date: 2006
Publisher: ACADEMIC PRESS INC ELSEVIER SCIENCE
Citation: JOURNAL OF COLLOID AND INTERFACE SCIENCE, 299(1), 249-259
Abstract: More than 85% of 10 mg L-1 of pentachlorophenol (PCP) was removed by magnesium/silver (206/1.47 mM) bimetal system in the presence of acetic acid. Dechlorination was found to be sequential and phenol was identified as the ultimate hydrocarbon skeleton along with some accumulation of tetra-, tri-, and dichlorophenols. The dechlorination reaction was found to follow second-order kinetics. Lower PCP removal efficiency (35%) was observed when the reaction was carried out in the absence of acid using Mg-0/Ag system. When the reaction was conducted using Mg-0 alone in the presence of acid, substantial sorption Of PCP Occurred with very low efficiency of PCP dechlorination. Dechlorination studies on 10 mg L-1 initial concentrations of 2,3,4,6-tetrachlorophenol (2,3,4,6-TeCP) and 2,4,5-trichlorophenol (2,4,5-TCP), under identical conditions as to PCP, revealed that dechlorination efficiency and reaction rate constants decrease with decreasing number of chlorine atoms on the target compound. A correlation (R-2 > 0.9) between the dechlorination rate constants and E-LUMO for chlorophenols was obtained. (c) 2006
URI: http://dx.doi.org/10.1016/j.jcis.2006.01.047
http://dspace.library.iitb.ac.in/xmlui/handle/10054/3354
http://hdl.handle.net/10054/3354
ISSN: 0021-9797
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