Purifying drinking water with 'super sand'

Sponsored by

June 23, 2011 -- Using nanotechnology, scientists have found a way to engineer sand with five times the filtering capacity of regular sand.

The researchers from Australia's Monash University, led by Mainak Majumder, say this new 'super sand' could significantly benefit developing countries, where more than a billion people lack clean drinking water.

To make the 'super sand,' researchers coated grains of sand with a nanomaterial called graphite oxide (GO). In lab tests, the 'super sand' was able to remove mercury and a dye molecule from water samples. Ordinary sand, they found, became saturated with 10 minutes of filtration. But the engineered sand continued to absorb the mercury for more than 50 minutes.

The scientists said the super sand's filtration performance was "comparable to some commercially available activated carbon." They said they are continuing to research ways to further enhance the sand to boost its contaminant removal efficiency.


Sponsored by


Central Valley groundwater levels reach historic lows; land subsidence intensifies

According to a new article published by the U.S. Geological Survey, groundwater levels in many wells across California's Central Valley are at or below historical low levels this year.

Philippines’ water market ripe for European participation, finds new report

Private sector water participation will increase in the Philippines up until 2020 with nine projects lined up...

GE’s Water boosts UF membrane offering with IMT acquisition

GE has acquired Netherlands-based membrane manufacturer IMT Solutions for an undisclosed sum...

WaterTAP features third-annual World Water-Tech Summit in Toronto

This week, more than 50 of the world's leading water experts will be in Toronto, Ontario, for the third annual World Water-Tech North America summit, being held October 6-8. The Water Technology Acceleration Project is the event's key partner in North America.




© 2015. PennWell Corporation. All Rights Reserved. PRIVACY POLICY | TERMS AND CONDITIONS