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Advanced Oxidation Degradation of Diclofenac

Abstract

Advanced oxidation/reduction processes (AO/RPs), utilize free radical reactions to directly degrade chemical contaminants as an alternative to traditional water treatment. This study reports the absolute rate constants for reaction of diclofenac sodium and the model compound (2, 6-dichloraniline) with the two major AO/RP radicals; the hydroxyl radical (•OH) and hydrated electron (e{sup -}{sub aq}). The bimolecular reaction rate constants (M{sup -1} s{sup -1}) for diclofenac for •OH was (9.29 ± 0.11) x 10{sup 9}, and, for e- aq was (1.53 ± 0.03) x10{sup 9}. Preliminary degradation mechanisms are suggested based on product analysis using {sup 60}Co γ-irradiation and LC-MS for reaction by-product identification. The toxicity of products was evaluated using the Vibrio fischeri luminescent bacteria method. (author)
Authors:
Cooper, William J., E-mail: wcooper@uci.edu; [1]  Song Weihua, E-mail: wsong@fudan.edu.cn [2] 
  1. Urban Water Research Center, Department of Civil and Environmental Engineering, University of California, Irvine, CA 92697 (United States)
  2. Department of Environmental Science & Engineering, Fudan University, Shanghai 200433 (China)
Publication Date:
Jul 01, 2012
Product Type:
Conference
Report Number:
IAEA-RC-1188.2
Resource Relation:
Conference: 2. research coordination meeting on radiation treatment of wastewater for reuse with particular on wastewaters containing organic pollutants, Jeongup (Korea, Republic of), 29 Oct - 2 Nov 2012; Other Information: Refs., 4 figs., 1 tab.; Related Information: In: Report of the 2nd RCM on Radiation Treatment of Wastewater for Reuse with Particular Focus on Wastewaters Containing Organic Pollutants. Working Material| 191 p.
Subject:
54 ENVIRONMENTAL SCIENCES; BACTERIA; BY-PRODUCTS; COBALT 60; ENVIRONMENTAL IMPACTS; ENVIRONMENTAL PROTECTION; ENVIRONMENTAL QUALITY; HYDRATION; HYDROXYL RADICALS; IRRADIATION; LUMINESCENCE; OXIDATION; REACTION KINETICS; SODIUM; SOLVATED ELECTRONS; SULFUR IONS; TOXICITY; WATER TREATMENT
OSTI ID:
22309208
Research Organizations:
International Atomic Energy Agency, Division of Physical and Chemical Sciences, Vienna (Austria)
Country of Origin:
IAEA
Language:
English
Contract Number:
Grant NSFC 21107016; CBET-1034555
Other Identifying Numbers:
TRN: XA14M2972015381
Availability:
Available from INIS in electronic form. Also available on-line: http://www-naweb.iaea.org/napc/iachem/working_materials/RC-1188-2-report.pdf
Submitting Site:
INIS
Size:
page(s) 168-179
Announcement Date:
Feb 28, 2015

Citation Formats

Cooper, William J., E-mail: wcooper@uci.edu, and Song Weihua, E-mail: wsong@fudan.edu.cn. Advanced Oxidation Degradation of Diclofenac. IAEA: N. p., 2012. Web.
Cooper, William J., E-mail: wcooper@uci.edu, & Song Weihua, E-mail: wsong@fudan.edu.cn. Advanced Oxidation Degradation of Diclofenac. IAEA.
Cooper, William J., E-mail: wcooper@uci.edu, and Song Weihua, E-mail: wsong@fudan.edu.cn. 2012. "Advanced Oxidation Degradation of Diclofenac." IAEA.
@misc{etde_22309208,
title = {Advanced Oxidation Degradation of Diclofenac}
author = {Cooper, William J., E-mail: wcooper@uci.edu, and Song Weihua, E-mail: wsong@fudan.edu.cn}
abstractNote = {Advanced oxidation/reduction processes (AO/RPs), utilize free radical reactions to directly degrade chemical contaminants as an alternative to traditional water treatment. This study reports the absolute rate constants for reaction of diclofenac sodium and the model compound (2, 6-dichloraniline) with the two major AO/RP radicals; the hydroxyl radical (•OH) and hydrated electron (e{sup -}{sub aq}). The bimolecular reaction rate constants (M{sup -1} s{sup -1}) for diclofenac for •OH was (9.29 ± 0.11) x 10{sup 9}, and, for e- aq was (1.53 ± 0.03) x10{sup 9}. Preliminary degradation mechanisms are suggested based on product analysis using {sup 60}Co γ-irradiation and LC-MS for reaction by-product identification. The toxicity of products was evaluated using the Vibrio fischeri luminescent bacteria method. (author)}
place = {IAEA}
year = {2012}
month = {Jul}
}