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

TODAY'S HEADLINES

Wastewater & Environmental Consultant Rambol Acquires ENVIRON for $1.7bn

Danish engineering, design and consultancy firm, Ramboll has acquired the U.S. based environmental and health consultancy, ENVIRON for $1.7 billion.

NSF to begin testing of new ballast water treatment system for USCG type approval

The NSF International Independent Laboratory will begin the testing of Evoqua's SeaCURE ballast water management system in preparation of the U.S. Coast Guard's full type approval. 

SUEZ to expand major Middle East WWTP in new contract

SUEZ ENVIRONNEMENT, through its subsidiary Degrémont, has been commissioned by the Government of Qatar's Public Works Authority (Ashghal), in consortium with its Japanese partner Marubeni Corporation, to expand the Doha West wastewater treatment and recycling plant.

IDA announces deadline extension for 2014-2015 Fellowship Award applications

The International Desalination Association has extended the deadline of applications for its 2014-15 Fellowship Program, giving candidates until Jan. 31, 2015 to apply.

FOLLOW US ON SOCIAL MEDIA