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

MWD board approves nation's largest water conservation program amid drought

The board of directors for the Metropolitan Water District of Southern California approved the nation's largest turf removal and water conservation program, expected to generate enough water savings to nearly fill Diamond Valley Lake over the next 10 years.

EPA grants BCR Environmental national PSRP Equivalency for biosolids treatment

The Environmental Protection Agency's Pathogen Equivalency Committee announced that it has granted its CleanB process National Process to Significantly Reduce Pathogens Equivalency to BCR Environmental.

Severn Trent Services - North America announces new executive team

Severn Trent Services - North America has officially announced its new executive team, consisting of six individuals.

MWRD to replace Egan WRP parking lot with green infrastructure

The Metropolitan Water Reclamation District of Greater Chicago is planning to upgrade a parking lot at its Egan Water Reclamation Plant in Schaumburg with green infrastructure that will not only provide an expanded space for vehicles but offer many benefits for water as well.

FOLLOW US ON SOCIAL MEDIA