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

Global nanofiltration membrane market to reach $445.1M by 2019, study finds

According to a new report published by BCC Research, the global market for nanofiltration membranes is expected to grow to $445.1 million by 2019, with a five-year compound annual growth rate (CAGR) of 15.6 percent.

USGS scientists publish new papers on water resources information

USGS scientists have recently published two separate papers that provide national overviews of the status of USGS water resources information in the context of historical and technical developments in the last half-century.

CH2M HILL earns National Merit Awards for water, wastewater design-build projects

The Design-Build Institute of America has announced the recipients of its 2014 Project/Team Awards, of which two design-build projects from CH2M HILL received National Merit Awards in the Water/Wastewater category.

Study of Gulf Coast Deepwater spill site reveals key to tracking pollutants

Results from a new study of ocean circulation patterns at the site of the Deepwater Horizon oil spill have revealed the large role that small-scale ocean currents play in the spread of pollutants, providing new information to help predict movements of oil and other pollutants in the ocean.

FOLLOW US ON SOCIAL MEDIA