TOMSK, Feb 25 – RIA Tomsk. Scientists
of Tomsk Polytechnic University (TPU) suggested to make of sand, corals
or waste products of building materials cheap means for water
purification from arsenic which is hazardous, but contains in potable
water in many regions of Russia and the world, the press-service of the
university informed on Thursday.
"Arsenic
in water –is the problem for many countries: India, China, the USA,
Argentina, Chile, Poland, Hungary and others. In the Russian Federation
it's urgent <…> in Transbaikalian, Khabarovsk, Perm, Stavropol
krais, Magadan, Penza region, in Dagestan, Tuva. Our technology allows
any country to find a cheap material of which it is possible to do a
sorbent", – words of the project's head Michael Haskelberg are given in
the message.
It
is noticed that within the frameworks of experiment politehnics managed
to clear about 18 thousand glasses of water with 200 gramms of the
means which cost for the consumer would be about 100 roubles.
Concentration of arsenic in water was 50 times higher than the norm
established by the World Health Organization. The technology is suitable
both for drinking and for technical water.
© пресс-служба ТПУ
It
is specified that resembling sorbents are already present in the world
market, but they are more expensive. So, one of the leading means
Bayoxide® E 33 costs about 27 dollars per kilogram, Tomsk substance will
cost 4-5 dollars. Polytechnics said means can be restored and used
again up to 10 times.
According
to TPU, to make a cheap and effective sorbent allows the using of
simple technologies. "Scientists use chemical adsorption when polluting
particles settle on a sorbent surface. Also the electrokinetic
adsorption is using, at which positively charged ions of heavy metals
are drawn to negatively charged surface of a sorbent", – explained in
the university.
It
is added that as raw materials can be used sand, corals, waste from
brick manufacture, aerated concrete and other substances. TPU scientists
have already submitted an application for patenting the technology and
are looking for partners who would help implement the development.
