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Arsenic is a common natural contaminant of well water and is highly carcinogenic. Iron oxide adsorption treatment for arsenic in groundwater is a commonly practiced removal process which involves the chemical treatment of arsenic species such that they adsorb onto iron oxides and create larger particles that may be filtered out of the water stream.
The Sono arsenic filter was invented in 2006 by Abul Hussam, who is a chemistry professor at George Mason University (GMU) in Fairfax, Virginia. It was developed to deal with the problem of arsenic contamination of groundwater . [ 1 ]
Ion exchange has long been used as a water softening process, although usually on a single-home basis. Traditional anion exchange resins are effective in removing As(V), but not As(III), or arsenic trioxide, which doesn't have a net charge. Effective long-term ion exchange removal of arsenic requires a trained operator to maintain the column.
He has spent much of his career trying to devise a solution to the problem of arsenic contamination of groundwater in eastern India and Bangladesh. Hussam initially started working on this problem in 1993. [1] His final innovation is a simple, maintenance-free system that uses sand, charcoal, bits of brick and shards of a type of cast iron.
The Grainger challenge is a scientific competition to find an economical way to remove arsenic from arsenic-contaminated groundwater.This competition is being funded by the United States National Academy of Engineering and the Grainger Foundation and is meant to help provide safe drinking water to countries such as Bangladesh, India, and Cambodia.
The company began as an online community of homeowners, sharing reviews based on their personal experience to help other homeowners find reputable contractors. [ 3 ] [ 4 ] Each review can contain details on the delivery of the work, the contractor's work habits and the quality of the follow-up. [ 5 ]
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