EPA Science Inventory

OXIDATION-REDUCTION POTENTIAL MEASUREMENTS OF IMPORTANT OXIDANTS IN DRINKING WATER

Citation:

Copeland, A. AND D. A. LYTLE. OXIDATION-REDUCTION POTENTIAL MEASUREMENTS OF IMPORTANT OXIDANTS IN DRINKING WATER. Journal AWWA. American Water Works Association, Denver, CO, 106(1):E10-E20, (2014).

Description:

Oxidation-reduction (redox) reactions are important in drinking water treatment and distribution. Oxidation-reduction potential (ORP) measurements of water reflect the tendency of major constituents in the water to accept or lose electrons. Although ORP measurements are valuable and can provide useful information toward protecting public health, they are not widely performed by the drinking water community for a variety of reasons. The objective of this research is to report the impact of five oxidants commonly used in drinking water as well as the pH on the measured ORP of water. Results show that the ORP of each oxidant system increased with increasing oxidant concentration to a maximum and decreased with increasing pH. Chlorine and chlorine dioxide waters had the greatest ORP followed by water containing monochloramine and permanganate, and water containing only oxygen. Duplicate ORP measurements revealed some inconsistencies with redox electrode measurements.

Purpose/Objective:

To inform the public.

URLs/Downloads:

http://dx.doi.org/10.5942/jawwa.2014.106.0002   Exit

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Record Details:

Record Type: DOCUMENT (JOURNAL/PEER REVIEWED JOURNAL)
Projected Completion Date: 01/01/2014
Record Last Revised: 03/27/2014
Record Created: 07/19/2010
Record Released: 07/19/2010
OMB Category: Other
Record ID: 226505

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL RISK MANAGEMENT RESEARCH LABORATORY

WATER SUPPLY AND WATER RESOURCES DIVISION

TREATMENT TECHNOLOGY EVALUATION BRANCH