Aug 29 2016

UTA study finds air contamination near fracking sites result of operational inefficiencies

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Chemists at the University of Texas at Arlington have published a new study that indicates that highly variable contamination events registered in and around unconventional oil and gas developments are the result of operational inefficiencies and not inherent to the extraction process itself.The study, published today as "Point source attribution of ambient contamination events near unconventional oil and gas development" in Science of the Total Environment, found highly variable levels of ambient BTEX, or benzene, toluene, ethyl benzene, and xylene compounds, in and around fracking gas drilling sites in the Eagle Ford shale region in South Texas. BTEX compounds in high concentrations can be carcinogenic and have harmful effects on the nervous system.
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Aug 29 2016

Storms in Mexico Kill Millions of Monarchs

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While international efforts are under way to help keep dwindling populations of monarch butterflies from disappearing, scientists are raising concerns about how severe weather and a loss of forest habitat at their wintering grounds in Mexico are affecting them.Every year, monarchs embark on an epic multigenerational migration that takes them thousands of miles from Canada and the U.S. in search of sites in California and in Mexico. The fir trees in the southern regions offer the shelter and warmth they need to survive the winter.Unfortunately, these vital forests in Mexico have been threatened by illegal logging, and now storms have destroyed hundreds of acres of habitat, while severe weather is believed to have killed an estimated 6.2 million of these iconic butterflies.
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Aug 26 2016

Waterloo chemists develop promising cheap, sustainable battery for grid energy storage

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Chemists at the University of Waterloo have developed a long-lasting zinc-ion battery that costs half the price of current lithium-ion batteries and could help enable communities to shift away from traditional power plants and into renewable solar and wind energy production.Professor Linda Nazar and her colleagues from the Faculty of Science at Waterloo made the important discovery, which appears in the journal, Nature Energy.
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Aug 26 2016

Blending wastewater may help California cope with drought

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Recycled wastewater is increasingly touted as part of the solution to California's water woes, particularly for agricultural use, as the state's historic drought continues. The cost of treating wastewater to meet state health standards for reuse and to reduce salt levels that damage crops presents a new set of challenges, however.Researchers at the University of California, Riverside have developed an economic model that demonstrates how flexible wastewater treatment processes which blend varying levels of treated effluent can be optimized to produce a water supply that is affordable, and meets and surpasses a variety of water quality requirements.
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Aug 26 2016

Study Suggests First Soda Tax in U.S. Is Working

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As politicians seek ways to combat the obesity epidemic here in the U.S., taxes and even bans on sodas have been floated in cities across the U.S. When former New York Mayor Michael Bloomberg first tried to tax and then limit the size of sodas in the Big Apple, howls of “the nanny state is here” roared across the country. Beverage industry trade groups screamed bloody murder over the cap on soda sizes that could be sold in NYC, and eventually New York State’s Court of Appeals ruled against the ban, saying the city’s health board lacked any such authority. Now an ex-mayor, Bloomberg has not given up. And a recent study on the effects of a similar policy in Berkeley, CA may give him even more ammunition as a campaign he bankrolled in Philadelphia was approved by its city council earlier this year.
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Aug 25 2016

Ecological consequences of amphetamine pollution in urban streams

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Pharmaceutical and illicit drugs are present in streams in Baltimore, Maryland. At some sites, amphetamine concentrations are high enough to alter the base of the aquatic food web. So reports a new study released today in the journal Environmental Science & Technology, which is one of the first to explore the ecological consequences of stimulant pollution in urban streams.Lead author Sylvia S. Lee conducted the work as a postdoctoral researcher at the Cary Institute of Ecosystem Studies. Lee, now with the Environmental Protection Agency, comments, "Around the world, treated and untreated wastewater entering surface waters contains pharmaceuticals and illicit drugs that originate from human consumption and excretion, manufacturing processes, or improper disposal. We were interested in revealing how amphetamine exposure influences the small plants and animals that play a large role in regulating the health of streams."
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Aug 25 2016

Perfluorinated compounds found in African crocodiles, American alligators

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American alligators and South African crocodiles populate waterways a third of the globe apart, and yet both have detectable levels of long-lived industrial and household compounds for nonstick coatings in their blood, according to two studies from researchers at the Hollings Marine Laboratory in Charleston, South Carolina, and its affiliated institutions, which include the National Institute of Standards and Technology.Production of some compounds in this family of environmentally persistent chemicals--associated with liver toxicity, reduced fertility and a variety of other health problems in studies of people and animals--has been phased out in the United States and many other nations. Yet all blood plasma samples drawn from 125 American alligators across 12 sites in Florida and South Carolina contained at least six of the 15 perfluorinated alkyl acids (PFAAs) that were tracked in the alligator study.
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Aug 25 2016

Sustainable alternative to methyl bromide for tomato production

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Following the phase out of methyl bromide, scientists continue to explore effective, viable, and more sustainable options for vegetable crop production. Among nonchemical alternatives, anaerobic soil disinfestation (ASD) is considered to be one of the most promising methods. ASD has been determined to be effective with a range of crops and environments against several soilborne fungal and bacterial plant diseases, plant-parasitic nematodes, and weeds.
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Aug 24 2016

New electrical energy storage material shows its power

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A powerful new material developed by Northwestern University chemist William Dichtel and his research team could one day speed up the charging process of electric cars and help increase their driving range.An electric car currently relies on a complex interplay of both batteries and supercapacitors to provide the energy it needs to go places, but that could change."Our material combines the best of both worlds -- the ability to store large amounts of electrical energy or charge, like a battery, and the ability to charge and discharge rapidly, like a supercapacitor," said Dichtel, a pioneer in the young research field of covalent organic frameworks (COFs).
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Aug 24 2016

How Elephant Seals Are Helping Scientists Study Climate Change

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A group of southern elephant seals is helping scientists monitorhow climate change is impacting Antarctica by tracking water temperature, depth, and salinity as they swim and dive around the frozen continent. 
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