Navigation Links
Researchers get new view of how water and sulfur dioxide mix
Date:5/9/2011

EUGENE, Ore. -- (May 9, 2011) -- High in the sky, water in clouds can act as a temptress to lure airborne pollutants such as sulfur dioxide into reactive aqueous particulates. Although this behavior is not incorporated into today's climate-modeling scenarios, emerging research from the University of Oregon provides evidence that it should be.

The role of sulfur dioxide -- a pollutant of volcanic gasses and many combustion processes -- in acid rain is well known, but how sulfur dioxide reacts at the surface of aqueous particulates in the atmosphere to form acid rain is far from understood.

In National Science Foundation-funded laboratory experiments at the UO, chemistry doctoral student Stephanie T. Ota examined the behavior of sulfur dioxide as it approaches and adsorbs onto water at low temperatures that mimic high-atmospheric conditions. Using a combination of short-pulsed infrared and visible laser beams, she monitored the interaction of sulfur dioxide with water as it is flowed over a water surface.

The results -- detailed online ahead of regular publication in the Journal of the American Chemical Society -- show that as sulfur dioxide molecules approach the surface of water, they are captured by the top-most surface water molecules, an effect that is enhanced at cold temperatures.

Although this reaching out, says co-author Geraldine L. Richmond, professor of chemistry, provides a doorway for sulfur dioxide to enter the water solution, the weak nature of the surface-bonding interaction doesn't guarantee that the water temptress will be successful.

"We have found that that the sulfur dioxide bonding to the surface is highly reversible and does not necessarily provide the open doorway that might be expected," Ota said. "For example, for highly acidic water, the sulfur dioxide approaches and bonds to the water surface but shows little interest in going any further into the bulk water."

The uptake of gases like sulfur dioxide has important implications in understanding airborne pollutants and their role in global warming and climate change. Sulfur dioxide that has come together with water, becoming aqueous, reflects light coming toward the planet, while carbon dioxide accumulating in the atmosphere traps heat onto the planet.

Understanding the interaction of surface water molecules, such as those in clouds and fog, with pollutants rising from human activity below may help scientists better predict potential chemical reactions occurring in the atmosphere and their impacts, said Richmond, who was elected May 3 as a member of the National Academy of Sciences.

"In the past we presumed that most chemistry in the atmosphere occurred when gas molecules collide and react," she said. "These studies are some of the first to provide molecular insights into what happens when an atmospherically important gas such as sulfur dioxide collides with a water surface, and the role that water plays in playing the temptress to foster reactivity."


'/>"/>

Contact: Jim Barlow
jebarlow@uoregon.edu
541-346-3481
University of Oregon
Source:Eurekalert  

Related biology news :

1. NC State researchers get to root of parasite genome
2. Researchers find animal with ability to survive climate change
3. Researchers find an essential gene for forming ears of corn
4. Researchers note differences between people and animals on calorie restriction
5. Researchers study acoustic communication in deep-sea fish
6. Researchers discover that growing up too fast may mean dying young in honey bees
7. Researchers study how pistachios may improve heart health
8. UI researchers find potentially toxic substance present in Chicago air
9. Researchers develop new self-training gene prediction program for fungi
10. Case Western Reserve University researchers track Chernobyl fallout
11. Childrens National researchers develop novel anti-tumor vaccine
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Researchers get new view of how water and sulfur dioxide mix
(Date:2/13/2017)... Former 9/11 Commission border counsel and Special Counsel to ... of Identity Strategy Partners, LLP, today releases the following ... Protecting the Nation From Foreign Terrorist Entry Into the ... Trump,s ,Travel Ban, Executive Order gains more notoriety and ... ban, it is important that our national discourse regain ...
(Date:2/8/2017)... Report Highlights ... The global synthetic-biology market reached nearly $3.9 ... growing at a compound annual growth rate (CAGR) of 24.0% ... global markets for synthetic biology. - Analyses of global market ... of compound annual growth rates (CAGRs) through 2021. - Coverage ...
(Date:2/7/2017)... February 7, 2017 Ipsidy Inc. ... Corporation [OTC: IDGS], ("Ipsidy" or the "Company") a provider ... processing services, is pleased to announce the following changes ... Effective January 31, 2017, Philip D. Beck ... CEO and President.  An experienced payment industry professional and ...
Breaking Biology News(10 mins):
(Date:2/23/2017)... 2017  Seattle,s upscale Capitol Hill neighborhood, with its swanky shops, ... a head lice treatment salon to set up shop. But ... and a French bistro on E Madison Ave, and CEO ... any old lice clinic, we pride ourselves on being a ... some of the stigma associated with lice. Everyone can get ...
(Date:2/23/2017)... ... February 23, 2017 , ... Today, researchers can fast-track ... uric acid, and/or other biomarkers or SNPs of interest) using one, easy-to-collect saliva ... , the relationship between insulin and other relevant biomarkers can be extensively studied ...
(Date:2/23/2017)... ... February 22, 2017 , ... Seventy-one members of ... Fellows of the Society this year, the Fellows Committee has announced. The honor ... optics, photonics, and imaging as well as their service to the Society and ...
(Date:2/22/2017)... Scientists propose in Nature blocking ... Gaucher and maybe other lysosomal storage diseases as a ... current therapies. An international research team led ... also included investigators from the University of Lübeck in ... 22. The study was conducted in mouse models of ...
Breaking Biology Technology: