Navigation Links
Ethanol blends carry hidden risk
Date:12/13/2013

low and forcing the gas outward and upward. That could overwhelm natural attenuation and should prompt new thinking about how to manage vapor-intrusion risks, Alvarez said.

"We want the bacterial activity to eat these vapors before they reach us," Alvarez said. He said many factors, including shallow groundwater or soil with low permeability that is not easily ventilated, could stand in the way.

"The amount of oxygen allowed to diffuse in would determine the assimilative capacity of the soil and the degradation capability," he said. "The bacteria will be there, but they're not going to do you much good if they run out of oxygen. The problem is bacteria that eat the methane use up all the oxygen, and the ones you want to degrade benzene can't do their job because they don't have any oxygen left."

Benzene is a carcinogen. According to the federal Centers for Disease Control and Prevention, long-term exposure can harm bone marrow and cause a decrease in red blood cells, leading to anemia. It can also cause excessive bleeding and affect the immune system.

Alvarez said studies have assessed the amount of methane generated by spills, but none have directly addressed what happens when the highly flammable vapors rise into confined spaces, where they can accumulate. He said flux chambers have been used to measure methane in such spaces, but they don't account for building effects like typically lower interior pressure that would draw vapors in through cracked foundations.

So the Rice lab led by Alvarez, with the participation of researchers from Chevron, Shell and the University of Houston, programmed a three-dimensional vapor intrusion model to simulate the degradation, migration and intrusion pathways of methane and benzene under various site conditions. The program modeled a small building with a perimeter crack around the foundation, sitting in the center of an open field. The atmospheric pressure was assumed to be slightl
'/>"/>

Contact: David Ruth
david@rice.edu
713-348-6327
Rice University
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Too green to be true? Researchers develop highly effective method for converting CO2 into methanol
2. Researchers say sunlight yields more efficient carbon dioxide to methanol model
3. Powerful enzymes create ethanol from agricultural harvest waste
4. Gut microbes in healthy kids carry antibiotic resistance genes
5. Radio waves carry news of climate change
6. Bees under threat from disease-carrying bumblebee imports, research reveals
7. PARP inhibitor shows activity in pancreatic, prostate cancers among patients carrying BRCA mutations
8. Biological wires carry electricity thanks to special amino acids
9. Achilles heel: Popular drug-carrying nanoparticles get trapped in bloodstream
10. Notre Dame research reveals migrating Great Lakes salmon carry contaminants upstream
11. Western aspen trees commonly carry extra set of chromosomes
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Ethanol blends carry hidden risk
(Date:4/2/2015)... 2, 2015 Fingerprint Cards (FPC) ... FPC1025 from the distributor World Peace Industrial Group (WPI), ... 2015 although the major part of the shipments will ... used by smartphone manufacturers in China ... in the communicated revenue guidance of + 1 000 MSEK ...
(Date:3/31/2015)... 2015   Guidepoint , a leading global research ... Pain Management TRACKER, part of the Guidepoint TRACKER ... the medical device and therapeutics markets. The Post-Surgical Pain ... volumes, market share, and adoption rates across three major ... surgery. The Post-Surgical Pain Management TRACKER will ...
(Date:3/24/2015)... Mar. 24, 2015 Research and Markets ( http://www.researchandmarkets.com/research/kvdtcw/face_and_voice ... Biometrics - Global Strategic Business Report" report to their offering. ... Voice Biometrics in US$ Thousands by the following Segments: Face Biometrics, ... US, Canada , Japan , ... Middle East & Africa , ...
Breaking Biology News(10 mins):Fingerprint Cards Receives Touch Fingerprint Sensor Order of SEK 110 Million 2Guidepoint Launches Post-Surgical Pain Management TRACKER 2Guidepoint Launches Post-Surgical Pain Management TRACKER 3Face and Voice Biometrics - Global Strategic Business Report 2015: Face Recognition Gains Prominence in Immigration Control 2Face and Voice Biometrics - Global Strategic Business Report 2015: Face Recognition Gains Prominence in Immigration Control 3Face and Voice Biometrics - Global Strategic Business Report 2015: Face Recognition Gains Prominence in Immigration Control 4Face and Voice Biometrics - Global Strategic Business Report 2015: Face Recognition Gains Prominence in Immigration Control 5Face and Voice Biometrics - Global Strategic Business Report 2015: Face Recognition Gains Prominence in Immigration Control 6
... Researchers from the Bellvitge Biomedical Research Institute (IDIBELL) ... a research into how the IDPN nitrile causes ... lateral sclerosis (ALS), a severe neuromuscular degenerative disease. ... recently published in Neuropathology and Applied Neurobiology ...
... trees such as black palms were probably once ingested and ... weighed more than a ton and dispersed the seeds over ... 10,000 years ago. So why aren,t large-seeded plants also extinct? ... Proceedings of the National Academy of Sciences (PNAS) ...
... programs are slowly reducing toxins in lakes and rivers, ... University researcher believes the issue needs more attention in ... Ph.D., assistant professor of biological sciences in the College ... is especially significant in distressed urban environments, where efforts ...
Cached Biology News:Poisoning from industrial compounds can cause similar effects to ALS 2Thieving rodents: Did they save tropical trees? 2Wayne State University researcher's program targets safer river fishing, anglers' health 2Wayne State University researcher's program targets safer river fishing, anglers' health 3
(Date:5/1/2015)... , May 1, 2015 ... Genetic Technologies Ltd (NASDAQ: GENE ), Agilent ... Scientific Inc. (NYSE: TMO ), Sequenom Inc. ... PKI ). Free research report on Genetic ... On Thursday, April 30, 2015, the NASDAQ Composite ...
(Date:4/30/2015)... 2015 Spirax Sarco, the leader in ... to announce that for the first time in the ... of a Queen’s Award for Innovation – the UK’s ... manufacture of a unique flowmeter. , The Spirax Sarco ... traditional steam flow measurement. The device provides reliable, ...
(Date:4/30/2015)... MN , April 30, 2015 /PRNewswire/ - BioAmber ... producing sustainable chemicals, today announced that it has commenced an ... BioAmber expects to grant the underwriters a 30-day option ... the shares of common stock offered in the public ... there can be no assurance as to whether or ...
(Date:4/30/2015)... MA & Budapest, Hungary (PRWEB) April 30, 2015 ... only web-based electronic lab notebook with integrated protocols ... in providing chemistry software solutions and consulting services ... led to the development of Labguru’s newest feature: ... set of deep domain features for biologists, bio-chemists, ...
Breaking Biology Technology:Life Sciences Tools and Services Stocks on our Radar -- Genetic Technologies, Agilent Technologies, Thermo Fisher Scientific, Sequenom, and PerkinElmer 2Life Sciences Tools and Services Stocks on our Radar -- Genetic Technologies, Agilent Technologies, Thermo Fisher Scientific, Sequenom, and PerkinElmer 3Life Sciences Tools and Services Stocks on our Radar -- Genetic Technologies, Agilent Technologies, Thermo Fisher Scientific, Sequenom, and PerkinElmer 4Life Sciences Tools and Services Stocks on our Radar -- Genetic Technologies, Agilent Technologies, Thermo Fisher Scientific, Sequenom, and PerkinElmer 5Spirax Sarco Receives a Queen’s Award for Innovation 2Spirax Sarco Receives a Queen’s Award for Innovation 3BioAmber Inc. Announces Public Offering Of Common Stock 2BioAmber Inc. Announces Public Offering Of Common Stock 3Labguru Integrates ChemAxon's Marvin JS, to Enhance Functionality for Chemists 2
... America, Inc.  (OTC Bulletin Board: CBAI ) announced ... www.bancovida.com ) to offer umbilical cord blood collection services in ... will allow BancoVida and Cord Blood America to educate prospective ... of storing their baby,s umbilical cord blood.  The stem cells ...
... 26, 2011 Infrared Systems International (OTCBB: IFRS) announces ... strategies for continued success. Most recently, the ... its subsidiary, Infrared Applications, Inc. (IAI).  The distribution marks ... from one engaged in the aerospace industry to one ...
... Shire plc (LSE: SHP, NASDAQ: SHPGY ... U.S. Food and Drug Administration (FDA) has granted marketing approval ... attacks of hereditary angioedema (HAE) in adults 18 years of ... challenges gaining rapid access to acute treatment such as the ...
Cached Biology Technology:Cord Blood America Enters Agreement With BancoVida, a Cord Blood Collection Company in San Juan, Puerto Rico 2Infrared Systems International Reflects on Past and Looks Forward to the Future 2Infrared Systems International Reflects on Past and Looks Forward to the Future 3FDA Approves Shire's FIRAZYR® (icatibant injection) for Acute Attacks of Hereditary Angioedema (HAE) 2FDA Approves Shire's FIRAZYR® (icatibant injection) for Acute Attacks of Hereditary Angioedema (HAE) 3FDA Approves Shire's FIRAZYR® (icatibant injection) for Acute Attacks of Hereditary Angioedema (HAE) 4FDA Approves Shire's FIRAZYR® (icatibant injection) for Acute Attacks of Hereditary Angioedema (HAE) 5FDA Approves Shire's FIRAZYR® (icatibant injection) for Acute Attacks of Hereditary Angioedema (HAE) 6
... The FailSafe™ PCR System is the only ... first time and every time. It provides ... of the source or the property of ... FailSafe™ PCR Enzyme Mix, a unique blend ...
...
Bis-Acrylamide (bis) is a monomer used as a crosslinker with acrylamide to form polyacrylamide electrophoretic gels. This 2% bis solution is supplied as 500 ml....
... immunostaining ,This solution has effect on enhancing ... clearer signal than the one obtained by ... of secondary antibody used and exposure time ... have images with high S/N ratio and ...
Biology Products: