WRITER: LISA POGUE
CONTACT: GARY GALLUZZO
300 Plaza Centre One
Iowa City IA 52242
(319) 384-0009; fax (319) 384-0024
Release: Nov. 13, 2002
UI professor receives $134,900 grant for water quality studies
Richard Valentine, professor of civil and environmental engineering in the
University of Iowa College of Engineering, has been awarded a two-year, $134,900
grant from the U.S. Geological Survey for a study of potential water contaminants.
Valentine's project, titled, "Relationship of nitroso compound formation
potential to drinking source water quality and organic nitrogen precursor
source characteristics," focuses on a recently discovered class of disinfection
by-products. These nitroso compounds are potent carcinogens formed when chlorine
disinfectants react with certain organic nitrogen-containing compounds that
Valentine hypothesizes that the compounds are most likely to form in waters
impacted by agricultural runoff and discharges from confined animal feeding
operations, as these may be an important source of organic nitrogen precursors.
"The existence of such linkages between drinking source water quality
and water quality at the tap would suggest that better control of some agriculturally
related practices may be warranted, or that some common disinfection practices
be modified to better consider the limitations in source water quality,"