In parallel with this increase, concern is growing too, as far as these products must be ecological, non-toxic, cheap and, in addition, effective. A research team of the University of Granada is working on the design of biodegradable detergents respectful with the environment, which adapt to the needs of the new times and harmless to humans; their work has given the first results through a doctoral thesis that, under the title “Biodegradation and toxicity of commercial tensioactives”, has been developed by Manuela Lechuga Villena, of the department of Chemical Engineering of the UGR.
This first study has focused on the analysis of four types of tensioactives which are usually present in the formulations of commercial detergents: lineal alkylbenzene sulphonate, which can be mainly found in manual dish soap and textile detergents and which is synthetised from non-renewable oil raw materials; nonylphenols polyethoxilates commonly used in industrial detergents for hard surfaces; fatty ethoxilated alcohols, appeared as an attempt for a more ecological answer to nonylphenols polyethoxilates and alkylpolyglucosids from oils and sugars, completely renewable raw materials which also have excellent cleansing properties and can be an excellent alternative to alkylbenzene.
An ecological and cheap alternative
After the having analysed these four wash compounds reproducing rivers' and seas' conditions in the laboratory to determine the toxicity of these products on sea bacteria, the researcher has concluded that fatty alcohols ethoxilated and alkylpolyglucosids show an excellent toxicological and biodegradation behaviour, which turns them into the best ecological alternative. In addition, according to Lechuga Villena, a previous work carried out by the research groups of the University of Granada [http://www.ugr.es] Tensioactives, Enzymes and Emulsions and Interfaces and Biochemical Technology confirms that the combination of these tensioactives leads to commercial products with an outstanding cleansing capacity.
The importance of this work of this work resides in the wide variety of implementations of these compounds –domestic uses, personal care, industrial and textile cleaning, hotel business, the restaurant and feeding industry– and, therefore, in their multiple effects in the long and short term not only on the environment, but also on human organism (dermatological, neurological, cardiologic actions, etc.)
One of the main objectives of this project is to prevent that the great proliferation of these chemical products ends up affecting humans and their environment. Therefore, these first results are “an indispensable step to formulate a detergent which is able to work with less aggressive means and with a high wash effectiveness”, explains the researcher, who adds that “this is at present one of the great challenges in the field of the companies that trade in this kind of detergents, which would be welcome both by consumers and by the producers who manufacture the specific and necessary machinery in the wash process”.
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University of Maryland researchers contribute to historic detection of gravitational waves and light created by event
On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...
Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.
Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....
Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).
When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...
Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.
How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...
Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.
It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...
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