JCE Online Journal of Chemical Education
 | Subscriptions  | Software Orders  | Support  | Contributors  | Advertisers  | 

JCE Print
   Current Issue
 Previous Issues
 Supplements
 Search JCE Index

JCE Digital Library
   JCEDLib Catalogue
   ChemInfo
 Data-Driven Exercises
 DigiDemos
 Featured Molecules
 LivTexts
 LrnCom
 QBank
 SymMath
 WebWare

JCE Software
   Latest Releases
 Software & Video
 Downloads
 Support

Only@JCE Online
   JCE Online Store
 JCE HS CLIC
 JCE Discussion Forums
   Biographical Snapshots
 ChemEd Resource Shelf
 Featured Molecules
 Hal's Picks
 Project Chemlab
 Reviewed WWW Sites
 "Web-Ed" Articles

About JCE
   Features
 Publications
 Operations
 Outreach
 Contact Us


  Home > JCE Print > Journal of Chemical Education > Issues > 1997  > July  >
Research: Science and Education
Free Radical Reactions in Aqueous Solutions: Examples from Advanced Oxidation Processes for Wastewater from the Chemistry in Airborne Water Droplets
N. Colin Baird
Department of Chemistry, University of Western Ontario, London, ON N6A 5B7, Canada
Cover
July 1997
Vol. 74 No. 7
p. 817
Abstract
Inorganic chemistry involving free radicals in aqueous solutions can be important in environmental processes. A common free radical reaction in aqueous solution is electron transfer, especially to the hydroxyl radical and to ozone. Hydrogen peroxide and free radicals related to it act as weak acids, so both their neutral and deprotonated forms must be considered in reactions. In Advanced Oxidation Processes, the hydroxyl radical concentration in water is greatly increased by reactions involving ozone and/or ultraviolet light. Irradiation of solid titanium dioxide can also be used to generate the radicals. The hydroxyl radicals are used in the Processes to initiate the oxidation of dissolved organic pollutants. Free radical reactions also play an important role in the chemistry of water droplets suspended in air in clouds and fogs. The radicals arise indirectly from the photoionization of dissolved organic compounds such as aldehydes and from the iron-catalyzed decomposition of dissolved hydrogen peroxide. They oxidize dissolved sulfur dioxide and certain organic compounds.
More Information
*  Citation
 Baird, N. Colin. J. Chem. Educ. 1997 74 817.
*  Keywords
 Inorganic Chemistry, Aqueous Solution Chemistry, Environmental Chemistry, Free Radicals, Reactive Intermediates
*  History
 Created:
Last Updated:		 July 28, 1999
June 23, 2005
<< Previous Article Table of Contents Next Article >>
  Home > JCE Print > Journal of Chemical Education > Issues > 1997 > July > Page 817



Chemistry Teacher Connection

The "Chemistry Teacher Connection" (CTC) is especially for high school chemistry teachers. For only $40/year, it offers an online-only subscription to CLIC along with membership in the Division of Chemical Education, normally $65/year. CTC subscribers receive access to all articles and supplements from 1996 through the current issue.
More About CTC
Order the Chemistry Teacher Connection

C&EN CLICs

Through special arrangement with the ACS, JCE High School CLIC is now able to provide subscribers with online access to Chemical & Engineering News articles that have been selected specifically for secondary science instructors and their students. 
 C&EN CLICs

JCE Collections Available
Occasionally, collections of JCE back issues become available for donation to individual teachers, schools, or libraries. JCE matches collections with interested recipients. Recipients pay shipping costs or pick up the collection.
 List of available collections

Contributions Welcome
JCE welcomes your submission
 Contributors's Corner

Subscriptions
 Subscription Info
 Order Forms

Fishing for New Ideas
Always in the
process of
improving, CLIC
welcomes ideas and comments.

Email Us

Comments to
jceonline@chem.wisc.edu		 Copyright © Division of Chemical Education, Inc., American Chemical Society.
All rights reserved.