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Degradation of triethanolamine and chemical oxygen demand reduction in wastewater by photoactivated periodate

Weavers, Linda K. and Hua, Inez and Hoffmann, Michael R. (1997) Degradation of triethanolamine and chemical oxygen demand reduction in wastewater by photoactivated periodate. Water Environment Research, 69 (6). pp. 1112-1119. ISSN 10614303. doi:10.2175/106143097X125849.

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The rapid reduction of chemical oxygen demand (COD) of industrial wastewater is achieved using a novel oxidant, periodate (IO_4^−), coupled with ultraviolet (UV) irradiation. The wastewater is characterized by a high COD, low total suspended solids, variable triethanolamine (TEA) concentrations, and low concentrations of iron and zinc. The use of periodate and UV irradiation with either aqueous TEA solutions or real wastewater is shown to be effective in reducing the COD to acceptable levels. The optimal pH for COD degradation is determined to be 7.6 because of the combined effects of pH on the speciation of TEA and IO_4^− Increasing the ratio of the initial concentrations of period ate to TEA, [IO_4^−]_0/[TEA]_0, increased the degradation rate up to an apparent saturation value. Irradiation with a 1 000-W mercury-xenon lamp increased the COD pseudo-first-order degradation rate constant by a factor of 5.5 for synthetic TEA solutions and 2.3 for industrial wastewater, compared to irradiation with a 1 000-W xenon lamp.

Item Type:Article
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Hoffmann, Michael R.0000-0001-6495-1946
Additional Information:© 1997. Submitted for publication January 30, 1996; revised manuscript submitted October 1, 1996; accepted for publication October 2, 1996. Credits. Sayuri Desai contributed to the preliminary experimental work. This research was funded by Eaton Corporation (Milwaukee, Wisconsin, U.S.) and the Advanced Research Projects Agency, and the Office of Naval Research (Grant NAV 5HFMN N00149J1901) of the Department of Defense.
Funding AgencyGrant Number
Eaton CorporationUNSPECIFIED
Advanced Research Projects Agency (ARPA)UNSPECIFIED
Office of Naval Research (ONR)NAV 5HFMN N00149J1901
Subject Keywords:chemical oxygen demand, oxidation, periodate, trieth-anolamine, ultraviolet irradiation, photolysis
Issue or Number:6
Record Number:CaltechAUTHORS:20150812-143044294
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Official Citation:Degradation of Triethanolamine and Chemical Oxygen Demand Reduction in Wastewater by Photoactivated Periodate Author(s): Linda K. Weavers, Inez Hua and Michael R. Hoffmann Source: Water Environment Research, Vol. 69, No. 6 (Sep. - Oct., 1997), pp. 1112-1119 Published by: Water Environment Federation Stable URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:59458
Deposited By: Ruth Sustaita
Deposited On:12 Aug 2015 22:25
Last Modified:10 Nov 2021 22:20

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