Discarded rice husks capture toxic dyes, offering a reusable water filter
Rice is the most-eaten food on the planet, and its discarded outer husk results in some 300 billion pounds of waste per year. FIU chemistry researcher Islam Ibrahim Hussein says the inedible castoffs could be the key to cleaner water.
Rice husks, a byproduct of the most-consumed food worldwide, could soon offer a sustainable solution to water pollution. A team of international scientists led by FIU chemistry researcher Islam Ibrahim Hussein have developed a biochar composite from discarded rice husks that can capture toxic dyes from water. The material, created by heating rice husks in a low-oxygen environment to form biochar, can trap industrial synthetic dyes like brilliant green and malachite green.
The researchers found that the material remained effective after at least five reuse cycles. The biochar's high surface area allows it to capture a large amount of contaminants. The development of this technology could help address the significant environmental impact of rice husk waste, which often ends up being burned or improperly disposed of, releasing pollutants into the air.
While the material has shown promise in laboratory testing, further research is needed to determine its effectiveness in real-world water samples and for other contaminants.
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