Navigation Links
Optical water quality assessment
Date:12/14/2010

Madison, WI December 14, 2010 -- Scientists at the U.S. Geological Survey (USGS) have proven that measuring fluorescence could improve source water monitoring during a study of the McKenzie River in Oregon. The study was designed to assess the amount, type and source of dissolved organic carbon that exists in all sources of drinking water.

Dissolved organic carbon can react with chlorine during water treatment and form halogenated compounds, commonly referred to as disinfection byproducts. Some of these byproducts are regulated by the U.S. Environmental Protection Agency, but a lack of strict controls and guidelines underscores the need for better understanding of sources for dissolved organic carbon. Measuring optical properties allows for researches to account for concentration, composition, and source of dissolved organic carbon, as well as its propensity to form disinfection byproducts.

In 2007 and 2008, water samples from the McKenzie River mainstream, tributaries and reservoir outflow were analyzed by scientists from the USGS in collaboration with the Eugene Water and Electric Board. Optical measurements assessed the full spectrum of fluorescence and absorption to provide an understanding of dissolved organic carbon properties and patterns, and to ascertain the benefits of using such measurements.

Results indicated sources of dissolved organic carbon and disinfection byproducts precursors originated upstream. They are most likely the consequence of human activity and are strongly linked to changes in the flow path of the waterway. Downstream tributaries did contain higher dissolved organic carbon concentrations; however they comprise less than 5% of the mainstream flow and therefore do not have a significant impact on drinking water.

Although there was interference while measuring the absorbance spectra, the study presented conclusive evidence illustrating the value of measuring optical properties.

"Optical measurements have the potential to be less expensive, faster, and more sensitive than laboratory chemical-based analyses," says Tamara Kraus, one of the authors of the study.

According to Kraus, instruments that measure optical properties have recently been developed and have the potential to help water utilities to understand the trends in water quality. She suggests that it would be more feasible and cost effective to lower the amount of disinfection byproducts precursors than establishing additional water treatment technologies.


'/>"/>

Contact: Sara Uttech
suttech@sciencesocieties.org
608-268-4948
American Society of Agronomy
Source:Eurekalert  

Related biology news :

1. Optical technique reveals unnexpected complexity in mammalian olfactory coding
2. Optical imaging technique for angioplasty
3. Applied physicists create building blocks for a new class of optical circuits
4. Optical Legos: Building nanoshell structures
5. Frost & Sullivan Recognizes MIRTEC With the 2009 Award for Automated Optical Inspection Product Innovation of the Year
6. Strained quantum dots show new optical properties
7. Femtomolar optical tweezers may enable sensitive blood tests
8. Breakthrough optical technology to assess colon cancer risk, accuracy
9. Freshwater sustainability challenges shared by Southwest and Southeast, researchers find
10. Satellite data provide a new way to monitor groundwater in agricultural regions
11. Pitt study finds green water treatments may not kill bacteria in large building cooling systems
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Optical water quality assessment
(Date:5/23/2017)... robotic gym for the rehabilitation and functional motor sense evaluation of lower ... . The first 30 robots will be available from June in ... The technology was developed and patented at the IIT laboratories and has ... to a 10 million euro investment from entrepreneur Sergio Dompè. ... ...
(Date:4/19/2017)... York , April 19, 2017 ... as its vendor landscape is marked by the presence ... market is however held by five major players - ... Together these companies accounted for nearly 61% of the ... the leading companies in the global military biometrics market ...
(Date:4/11/2017)... PALM BEACH GARDENS, Fla. , April 11, ... biometric identity management and secure authentication solutions, today ... million contract by Intelligence Advanced Research Projects Activity ... technologies for IARPA,s Thor program. "Innovation ... the onset and IARPA,s Thor program will allow ...
Breaking Biology News(10 mins):
(Date:9/21/2017)... (PRWEB) , ... September 21, 2017 , ... ... HQ office, which includes executive, engineering and manufacturing functions to The LaunchPort™ Accelerator ... The Factory™, provide a full range of manufacturing and business services to its ...
(Date:9/21/2017)... Jersey (PRWEB) , ... September 21, 2017 , ... ... pharmaceutical and clinical research sector professionals, has announced the addition of 5 new ... 11 training - Compliance with Regulation 21 CFR Part 11 on Electronic ...
(Date:9/20/2017)... New Haven, CT (PRWEB) , ... September 20, ... ... therapeutics company, announced today that it has appointed Vishwas Paralkar to the role ... of Cybrexa’s tumor targeting technology. He will report to Cybrexa’s president and CEO, ...
(Date:9/20/2017)... ... September 20, 2017 , ... From industry leaders, sports stars, and Hollywood icons ... Many of these people had lost all hope. Their stories are told ... (pdf) , “Neil takes readers on a riveting journey through the past, ...
Breaking Biology Technology: