Photochemical Production of Hydroxyl Radical from Aqueous Iron(III)–Hydroxy Complex: Determination of Its Reaction Rate Constants with Some Substituted Benzenes Using Deoxyribose-Thiobarbituric Acid Assay
Hydroxyl radical (•OH) production, mediated by UV light, from aqueous ferric perchlorate was investigated at low pH using a deoxyribose–thiobarbituric acid (–TBA) assay. The rate of production of •OH was found to be dependent on the irradiation time. Addition of suitable substrates such as substituted benzenes can compete for the reaction of •OH with deoxyribose, leading to a decreased yield of TBA chromogen formed from the deoxyribose–TBA assay. The second-order rate constants of the added substrates can be determined from such a simple competition kinetic method. The second-order rate constants for the reaction of •OH with a number of substituted benzenes were determined using this method and the values were compared with the reported rate constants using pulse radiolysis technique. The values determined using the present method (1 to 8 × 109 dm3/mol·s) are in good agreement with those reported by use of the pulse radiolysis technique. It is proposed that the photoproduction of •OH from aqueous ferric perchlorate coupled with deoxyribose–TBA assay is a simple and efficient method for determination of rate constants for the reaction of •OH with a variety of substituted benzenes that are known to be organic water contaminants.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
Document Type: Research Article
Publication date: 01 March 2001
More about this publication?
- Water Environment Research (WER) is published monthly, including an annual Literature Review. A subscription to WER includes access to the latest content back to 1992, as well as access to fast track articles. An individual subscription is valid for 12 months from month of purchase.
Water Environment Research (WER) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year. Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
- Editorial Board
- Information for Authors
- Submit a Paper
- Subscribe to this Title
- Membership Information
- Information for Advertisers
- WEF Bookstore
- Ingenta Connect is not responsible for the content or availability of external websites