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Showing posts from July 27, 2008

Bacteria and Nanofilters: The Future Of Clean Water Technology

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Bacteria and Nanofilters:The Future of Clean Water Technology

Bacteria often get bad press, with those found in water often linked to illness and disease. But researchers at The University of Nottingham are using these tiny organisms alongside the very latest membrane filtration techniques to improve and refine water cleaning technology.

These one-celled organisms eat the contaminants present in water — whether it is being treated prior to industrial use or even for drinking — in a process called bioremediation.

The water is then filtered through porous membranes, which function like a sieve. However, the holes in these sieves are microscopic, and some are so small they can only be seen at the nanoscale. Pore size in these filters can range from ten microns — ten thousandths of a millimetre — to one nanometre — a millionth of a millimetre.

These technologies can be developed into processes which optimise the use of water — whether in an industrial system or to provide drinking water in ar…

Himalayan Glaciers Shrinking Every Year

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Himalayan Glaciers Shrinking Every Year

Glaciers in the Himalayas are retreating at an alarming rate of 15-20 metre every year, says the study jointly done by Himachal Pradesh Science and Technology Council and Space Research Station, Ahmedabad.

With rising global temperature, glaciers in Himalayas are retreating at an alarming rate of 15-20 metre every year, which could adversly impact agriculture in the region.

Mapping of 400 glaciers done jointly by the Himachal Pradesh Science and Technology Council and Space Research Station Ahmedabad since 1994 on rivers Chandra, Beas, Ravi, Satluj, Spiti and Baspa has shown that the glaciers are retreating.

"There had been a retreat of 10-15 m per year in 400 glaciers," A B Kulkarni, head of Glaciology wing of Space Research Station, Ahmedabad, said.

A Report of Geological Survey of India (GSI) says that prominent glaciers like Chota Sigri in Lahaul-Spiti district showed a retreat of 6.81 m per year, Bara Sigri 29.78 m per year, Trilokinat…