| 摘要 |
A contaminant-removal filter for removing basic contaminants from a gas stream, such as air. The filter has a porous or fibrous body that includes a plurality of passages extending from a first, inlet face to a second, outlet face, the passages providing flow paths. The body has an acidic material, such as citric acid, and at least one of a preservative and a stabilizer impregnated throughout the substrate. The filter is free of any humectants.
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