Researchers at Oak Ridge National Laboratory are tackling a global water challenge with a unique material to target two toxic, heavy metals
are tackling a global water challenge with a unique material designed to target not one, but two toxic, heavy metal pollutants for simultaneous removal.
“It is rare for an adsorbent to capture two pollutants simultaneously, and to work quickly and efficiently in realistic scenarios to address the broad range of water conditions worldwide,” Jansone-Popova said. In water, these metals dissolve to form chromate and arsenate oxoanions, or salts, that are chemically similar to beneficial minerals that are naturally present in water including phosphate, sulfate, nitrate and bicarbonate. Chromate and arsenate are highly mobile in water and can have far-reaching impacts. They do not degrade and are permanent in the environment without intervention.
“They are one of the most promising water treatment options because they are affordable, easily deployed and can work quickly to filter water supplies, but they need to be tailored for practical use in cleanup scenarios,” Jansone-Popova said. “The challenge is to design materials that can effectively isolate trace amounts of harmful elements that are very similar to the bulk chemical species found in water.
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