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Two new insoluble polymeric materials were evaluated for their efficacies in inactivating rotavirus in flowing water in a biocidal filter application. The two polymers are N-chloro and N-bromo derivatives of a poly-styrene hydantoin prepared from commercial poly-styrene. The studies were conducted for rotavirus in halogen demand-free water at pH 7.0, 25 degrees C and Environmental Protection Agency (EPA) Test Water no. 2 at pH 9.0, 4 degrees C which contained heavy halogen demand. The range of flow rates studied was 0.16-1.22 ml s-1 corresponding to contact times in the range of 4-24 s. Both of the polymers were effective in inactivating rotavirus, the N-bromo derivative providing a 4-6 log reduction under the test conditions. The materials may be useful as supplemental filters for hand-held water purification units.
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L Liu, and
G Sun, and
S D Worley, and
A Mitra
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V S Panangala, and
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