The Grainger challenge is a scientific competition to find an economical way to

remove Remove, removed or remover may refer to: * Needle remover * Polish remover * Staple remover * Remove (education) * The degree of cousinship, i.e. "once removed" or "twice removed" - see Cousin chart See also * Deletion (disambiguation) * Moving ...

arsenic Arsenic is a chemical element with the symbol As and atomic number 33. Arsenic occurs in many minerals, usually in combination with sulfur and metals, but also as a pure elemental crystal. Arsenic is a metalloid. It has various allotropes, b ...

from arsenic-contaminated groundwater. This competition is being funded by the

United States National Academy of Engineering The National Academy of Engineering (NAE) is an American nonprofit, non-governmental organization. The National Academy of Engineering is part of the National Academies of Sciences, Engineering, and Medicine, along with the National Academ ...

and the Grainger Foundation and is meant to help provide safe

drinking water Drinking water is water that is used in drink or food preparation; potable water is water that is safe to be used as drinking water. The amount of drinking water required to maintain good health varies, and depends on physical activity level, ...

to countries such as

Bangladesh Bangladesh (}, ), officially the People's Republic of Bangladesh, is a country in South Asia. It is the eighth-most populous country in the world, with a population exceeding 165 million people in an area of . Bangladesh is among the mo ...

India India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area, the List of countries and dependencies by population, second-most populous ...

, and

Cambodia Cambodia (; also Kampuchea ; km, កម្ពុជា, UNGEGN: ), officially the Kingdom of Cambodia, is a country located in the southern portion of the Indochinese Peninsula in Southeast Asia, spanning an area of , bordered by Thailand ...

. In 2007, the winner of the Gold Award ($1,000,000) was

Abul Hussam Abul Hussam is the inventor of the Sono arsenic filter. He is a chemistry professor at George Mason University (GMU) in Fairfax, Virginia, and a member of advisory board at Shahjalal University of Science and Technology. Life and career Hussam ...

, for his invention of the

Sono arsenic filter 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. The filter is now ...

. The Silver Award ($200,000) was awarded to Arup K Sengupta for his invention and implementation o
ArsenX^np
hybrid anion exchange (HAIX) resin. The Children's Safe Drinking Water Program at

Procter & Gamble The Procter & Gamble Company (P&G) is an American multinational consumer goods corporation headquartered in Cincinnati, Ohio, founded in 1837 by William Procter and James Gamble. It specializes in a wide range of personal health/consumer he ...

(P&G), Cincinnati, received the Bronze Award of US$100,000 for th
PUR™ Purifier of Water
coagulation and flocculation water treatment system.

References

External links

Grainger challenge page at the National Academy of EngineeringGrainger Foundation
Water treatment Arsenic {{watersupply-stub