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Filter for Arsenic-Polluted Water in Bangladesh Pays Off for Chemist

andyg 于2007-02-11发布 l 已有人浏览
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&raquo Download Audio(mp3) By Jill Moss 2007-2-11 This is the VOA Special English Development Report.

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by jill moss
2007-2-11

this is the voa special english development report.

every day, millions of people around the world drink water from wells that are polluted with high levels of arsenic. arsenic is an element that can be released into groundwater by soil and rocks. over a long period of time, water from poisoned wells may lead to deadly cancers.

abul hussam

chemist abul hussam has developed a home treatment system for drinking water in his native bangladesh. almost all arsenic is removed as water passes through two containers. they hold river sand, pieces of iron and wood charcoal.

sono filter system is manufactured in his hometown of kushtia, where he also did much of his research. he tells us that his first task was to develop instruments to measure the exact amounts of arsenic in the water.

early tests on two wells at the home where he lived as a child found arsenic levels three to four times higher than normal. as a chemist, he felt that if he could not solve what he calls the "home problem," then his education would not be very useful.

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