Navigation Links
Optical water quality assessment

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
American Society of Agronomy

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:
Related Image:
Optical water quality assessment
(Date:10/29/2015)... Connecticut , October 29, 2015 ... a biometric authentication company focused on the growing ... smart wallet announces that StackCommerce, a leading marketplace ... be featuring the Wocket® smart wallet on StackSocial ... NXTD ) ("NXT-ID" or the "Company"), a biometric ...
(Date:10/27/2015)... 27, 2015 In the present market scenario, ... for various industry verticals such as banking, healthcare, defense, ... growing demand for secure & simplified access control and ... as hacking of bank accounts, misuse of users, , ... as PC,s, laptops, and smartphones are expected to provide ...
(Date:10/27/2015)... SAN JOSE, Calif. , Oct. 27, 2015 /PRNewswire/ ... human interface solutions, today announced that Google has adopted ... family of touch controller solutions to power its newest ... Nexus 6P by Huawei. --> ... ecosystem partners like Google to provide strategic collaboration in ...
Breaking Biology News(10 mins):
(Date:12/1/2015)... SAN FRANCISCO , Dec. 1, 2015  Symic, ... and affect the extracellular matrix (ECM), today announced that ... financing to advance the company,s pipeline, including its lead ... Lilly Ventures and includes the participation by all existing ... new funding brings the total capital raised by Symic ...
(Date:12/1/2015)... Texas (PRWEB) , ... December 01, 2015 , ... Matthew ... his new post, VerMilyea will oversee all IVF lab procedures as well ... and fertility preservation. , “We traveled 7,305 miles to Auckland, New Zealand to bring ...
(Date:11/30/2015)... ... 2015 , ... Global Stem Cells Group today ... Santiago Marriott. The Global Stem Cells Group GMP facility is equipped with the ... medical researchers and practitioners, experienced in administering stem cell protocols using highly manipulated ...
(Date:11/30/2015)... 1, 2015 Partnership includes an ... for the u niversity , s ... treatment s cale - up ... Africa , where licensees based anywhere in the world will ... technology. --> Africa , where licensees based anywhere in the ...
Breaking Biology Technology: