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Arsenic filter

19 bytes added, 00:54, 14 June 2012
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[[Image:arsenic removal.jpg|thumb|right|250px| Arsenic removal system: oxidation method. <br>Photo: Ngai.]]
[[Image:arsenic removal two.jpg|thumb|right|250px|Magc-Alcan Filter (left) and Nirmal Filter (right): adsorption method. Photo: Ngai.]]
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