cotton, fleece, and beads. - oil spill pads

by:Demi     2019-09-15
cotton, fleece, and beads.  -  oil spill pads
There is no shortage of products to eliminate oil leakage in water.
"But there's certainly no magic bullet," Daniel F pointed out . "
Sheehan is the chairman of the Inter-Agency Coordination Committee for federal oil pollution research and directs the Coast Guard National Pollution Fund Center in Arlington, Va.
In fact, he said, "I don't think there is any significant technological progress in oil --
Leak recovery areas in the past 15 years.
But some research groups are trying to change that.
Two groups in Texas, for example, have begun investigating an unusual source of eco-friendly oil raw materials --
Clean up the product. These spill-
Eating materials is waste: fly ash and poor people left by coal
Quality cotton and wool.
Adam Heller is in charge of one of the projects at the University of Texas in Austin.
Over the past year, his team has coated floating microscopic glass bubbles with titanium dioxide.
Primary pigment in white paint, this chemical is also an efficient light catalyst, greatly speeding up the speed of sunlight
Indirect decomposition of many chemicals, including toxic hydrocarbons.
Heller's team added water after baking the paint onto the glass beads
Reject surface film.
When sprinkled on a small pool of crude oil floating on a plate of water and then stirred violently, these tiny beads combine nearly half of the hydrocarbons.
The Black Oil soon began to bleach.
In the end, only the white beads floating on the water are left.
Heller explained the magic behind the shift at 1993 International Oil Spill Conference in Tampa, Florida last month.
In the presence of sunlight or other near Sources
The titanium white coating accelerates normal sunlight under UV irradiation
Driving reaction with water.
This produces highly active molecular fragments known as free radicals, which in turn facilitate the reaction between oil and oxygen in the air.
Hailer said a series of reactions triggered by free radicals later broke down the compound into carbon dioxide and water.
This process does produce some brief
Intermediate Life
Molecules of size, but these chemicals are still absorbed onto beads before the decomposition process begins.
Sunlight alone can induce the decomposition of many hydrocarbons.
But Hailer says his tests show that surface reactions on glass bubbles are much less toxic than those produced by sunlight and break down more thoroughly
Only decomposition.
Beads themselves-
The same composition as sand. -
It is non-toxic, he added.
Even titanium dioxide is non-toxic.
Instant vanilla, Hile notes
The pudding mixture, many toothpaste and cosmetics contain this relatively cheap compound.
"There is no reason why we can't apply these beads to the most eco-friendly sensitive areas, although he added," it remains to be proved. ".
"In fact, he speculated that a hot bath with these beads could safely clean the feathers of the oily waterbird.
The oxygen needed is collected from the local environment, "each of these bubbles is a catalytic reactor," says Heller . ".
The speed at which they break down oil depends on how fast they are exposed to sunlight and oxygen.
Because the stirred water helps to achieve both, hailer believes that in the stormy ocean, rolling waves that can make the boom and the spenders useless (
For example, on January, the tanker Braer encountered when he was stranded in the Shetland Islands in Scotland)
Could actually improve oil.
Breakdown efficiency of beads.
In theory, the beads eliminate the weight in the oil every hour, he said.
However, in a lab experiment conducted so far by Hailer's team, the beads took a week or two to break down the oil.
The researchers have successfully broken down five different oils using beads, although they have never broken down more than a few ounces of oil in batches.
In April, a company that was allowed to sell the technology began the pilot.
Large-scale production of beads.
When there is more quantity, Heller wants to use beads to clean up the hydrocarbons in the industrial waste pool for on-site testing.
Beads can be made into the required size--
The diameter is about 50 to 80 microns, says Mr.
However, he noted that the fly ash extracted from the burning coal contained similar glass spheres that, while heavier, could also function.
Using these much lower-cost alternatives could create a new market for some of the nearly 58 million tons of volcanic ash shipped to the United States each year. S. landfills.
Harry Whitaker, a chemical engineer at Environment Canada in Ottawa, believes that microbead technology may be useful, but believes that the promise of microbead technology is "oversold ".
"Whittaker leads his federal agency's application research and development project on the technology of cleaning up oil spills, chemical leaks and leaking chemical landfill sites.
Although he and his colleagues have not yet tested beads, they have explored the potential of titanium dioxide to clean hydrocarbons --
Polluted waters since 1987.
Their research suggests that not all hydrocarbons can be quickly degraded into carbon dioxide and water, or exactly as Heller says.
"Some people are very stubborn," Whittaker said . "
He also suspects that birds and other animals may suffer toxic consequences if they ingest any floating glass beads.
He pointed out that the intake would cut off the way bees come into contact with the sun and prevent further degradation of any toxic hydrocarbons they carry.
If Whittaker can obtain beads from the company that the University of Texas licensed to manufacture them, he will measure the rate at which different hydrocarbons break down and look for potential by-products of incomplete destruction, when you try to use these beads on a variety of chemicals, the beads may fall off, "he said.
"We will also find out if there is any loss [
Processing. of hydrocarbon compounds
As absorbed into the glass beads themselves.
Despite these problems, Whitaker said he was very interested in the technology.
His lab is currently exploring the use of fiberglass filters soaked in titanium dioxide to remove and decompose water contaminants.
He said that if his research confirmed the Haile group's claim, the Canadian research project could also turn to beads.
A separate group led by Harry W.
Parker at the Texas Tech University in lubock is investigating more common materials to clean up oil.
The annual cotton harvest produces millions of pounds of fibers that are too short to interest fabric manufacturers.
The weavers of wool also avoided a similar amount.
The fibers are thick due to the inherent scratches.
If Parker has his approach, both fibers currently considered waste will eventually be commercially attractive as an absorbent for spills of hydrocarbons.
Parker's research shows that both fibers have the original form of reaching or exceeding the absorption of materials currently on the market for absorbing spilled oil.
But unlike synthetic materials that are usually sold for this purpose, his wool and cotton are biodegradable.
Use 1-in laboratory testing-or 2-
In a high-rise fermentation reactor, microorganisms can easily degrade natural fibers, even those coated with diesel or crude oil, Parker said.
In fact, he says his research team's biological studies have shown that the decomposition of this fiber can be easily released.
Oil to float it to the top of the reactor.
The cleaning manager can separate this oil and run it through an additional fermentation cycle that is full of oil
He suggested killing bacteria.
Alternatively, the oil can be reused.
Parker pointed out that there is no doubt that it is cheaper to treat dirty adsorbent in landfill than biodegradable.
However, if the EPA is successful in its current efforts to re-classify oil,
He said the cost of burying hazardous waste materials could soar, making his plan an economic and "green" alternative.
By October, Parker and his colleagues wanted a pilot.
Scale fermentation in 50-yearto 250-
Gallon reactor
Only a large trial like this would determine the potential limitations and prospects of biodegradable adsorption agents, he said.
In preparation for last year's International Conference, Shane's inter-agency committee compiled an oil database
Clean up research
"I'm surprised that there are so few in the world," he told Science News . ".
Although leak managers have identified many significant gaps in their clearing technology, they lack the funding for research and development projects to fill those gaps, according to research analysts who spoke at the first international oil spill research and development forum held in Va McLean on last June.
France, for example--
The scene of the catastrophic Amoco Cadiz tanker leak on 1978--
Jean-a report submitted at the Forum noted that "no funding has been provided for Oil Research and development"
Francois Levy, head of the inter-ministerial delegation in Paris.
Recent federal government spending on oil
Sheehan pointed out that as the world leader in this field, spillover R & D in the United States is about $30 million per year on average. -"not much.
"However, the federal agency has drafted a Five
An annual R & D plan to address some of the most pressing research gaps.
"If we can get more, how will we spend money," said Sheehan . ".
"In fact, we hope [
New Oil Pollution Act
The certainty of funding will begin ,[because]
The farther you are from a major oil spill, the less interest you have in oil. spill R&D.
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