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Chaff
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==Use== Hungarian engineer László Schremmer has discovered that the use of chaff-based filters can reduce the [[arsenic]] content of water to 3 microgram/litre. This is especially important in areas where the potable water is provided by filtering the water extracted from an underground [[aquifer]].<ref>[http://mno.hu/gazdasag/szenzacios-magyar-talalmany-1068315 Newspaper article] {{Webarchive|url=https://web.archive.org/web/20120417212726/http://mno.hu/gazdasag/szenzacios-magyar-talalmany-1068315 |date=2012-04-17 }} (in Hungarian) published by [[Magyar Nemzet]] on April 15, 2012.</ref>
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