Nanomaterial for Quick, Simple Removal of Toxic Arsenic in Drinking Water

january 23 2012

Prof. Dr. Sherif El-Safty, a Principal Researcher of the Materials Recycling Design Group, Research Center for Strategic Materials, National Institute for Materials Science developed a nanomaterial which enables simple detection and removal of arsenic from drinking water. This nanomaterial responds to warnings that as many as 60 million people live in contaminated areas in Southeast Asia without safe drinking water.

The nanomaterial is a further developed for heavy metalion sensors for lead (Pb), mercury (Hg), etc. and adsorbent materials, which Dr. El-Safty developed previously for a rare metal adsorption/recovery materials such as cobalt (Co), palladium (Pd), etc. and radioactive element adsorbents for cesium (Cs), strontium (Sr), etc.

In the developed technology, the inner walls of nanoporous substances, namely a high order mesoporous (HOM) structures, are densely packed with a functional group which is sensitive and selective for capturing arsenic. When even a trace amount of arsenic is present in water, these nanomaterial captors can quickly adsorbed and removed arsenic. As a distinctive feature, the detection/removal of arsenic can easily be confirmed because the color of the nanomaterial captors changes in the adsorption stage with the same frequency of human eyes, showing the user that the removal has occurred.

As one particular advantage of this technology, the potential use is not limited to large-volume water treatment plants. Because its features include high sensitivity, low cost, visualization of results, light weight, and high speed, it can also be used easily by individual persons. As a result, the threat of arsenic can be greatly reduced when the development of new water sources in the developing countries and elsewhere is achieved. Efforts will be made to popularize this new device in many urgent regions, as a technology that can secure the safe water on an everyday basis.

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