Graduate student Brian Breaker, with Erik Pollock, Brian Haggard of the Arkansas Water Resources Center and professor Phil Hays of the geosciences department and the U.S. Geological Survey, reported their preliminary findings at a recent meeting of the American Geophysical Union.
The Illinois River Watershed is the site of a mystery – high nutrient loads that have muddied the waters between Arkansas and Oklahoma. The nutrient loads themselves are not contested, but the source of these high amounts of nitrogen and phosphates are, and currently the sources of the nutrients are not explicitly identified.
Breaker and his colleagues are looking at oxygen isotopes of dissolved phosphates to try to identify the sources of the nutrients found in the watershed. Isotopes, or atoms of the same type but with slightly different weights, are found in plants, animals and organic matter. Different types of organic material have different isotope signatures, or unique proportions of a particular atom at a particular atomic weight. The researchers wanted to see if they could see a signature that varied between sources. If so, those signatures also might be seen in the nutrient loads downstream.
The researchers examined five different sources of potential nutrient loads in the watershed – soil derived phosphorus, septic system effluent, wastewater treatment plant effluent, poultry litter and commercial fertilizers. They collected water samples from the source and examined the oxygen isotopes of the phosphates contained in each one.
“We went straight to the point where we had a firm handle on the source,” Hays said. The researchers then took the samples to the laboratory, where they examined the oxygen isotope ratios found in the phosphates.“We do indeed see a recognizable distinction between these sources,” Hays said.
“This could be a strong and effective method for managing nutrients,” Hays said. “It’s not a silver bullet. But it is another tool in the toolbox that can help clarify things.”Phil Hays, professor, geosciences
Melissa Lutz Blouin | Newswise Science News
Further reports about: > Arkansas > Illinois River Watershed > Nutrient Source > Organic Matter > River > Wastewater > Watershed > atomic weight > high nutrient loads > marine environments > nitrogen > organic material > oxygen isotope > oxygen isotopes > phosphates > poultry litter > septic system effluent > treatment plant effluent
Despite government claims, orangutan populations have not increased. Call for better monitoring
06.11.2018 | Deutsches Zentrum für integrative Biodiversitätsforschung (iDiv) Halle-Jena-Leipzig
Increasing frequency of ocean storms could alter kelp forest ecosystems
30.10.2018 | University of Virginia
Biochips have been developed at TU Wien (Vienna), on which tissue can be produced and examined. This allows supplying the tissue with different substances in a very controlled way.
Cultivating human cells in the Petri dish is not a big challenge today. Producing artificial tissue, however, permeated by fine blood vessels, is a much more...
Faster and secure data communication: This is the goal of a new joint project involving physicists from the University of Würzburg. The German Federal Ministry of Education and Research funds the project with 14.8 million euro.
In our digital world data security and secure communication are becoming more and more important. Quantum communication is a promising approach to achieve...
On Saturday, 10 November 2018, the research icebreaker Polarstern will leave its homeport of Bremerhaven, bound for Cape Town, South Africa.
When choosing materials to make something, trade-offs need to be made between a host of properties, such as thickness, stiffness and weight. Depending on the application in question, finding just the right balance is the difference between success and failure
Now, a team of Penn Engineers has demonstrated a new material they call "nanocardboard," an ultrathin equivalent of corrugated paper cardboard. A square...
Physicists at ETH Zurich demonstrate how errors that occur during the manipulation of quantum system can be monitored and corrected on the fly
The field of quantum computation has seen tremendous progress in recent years. Bit by bit, quantum devices start to challenge conventional computers, at least...
09.11.2018 | Event News
06.11.2018 | Event News
23.10.2018 | Event News
15.11.2018 | Earth Sciences
15.11.2018 | Physics and Astronomy
15.11.2018 | Physics and Astronomy