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二氧化氯预氧化控制饮用水三卤甲烷生成势的研究

, PP. 1119-1122

Keywords: 二氧化氯,预氧化,三卤甲烷生成势(thmfp)

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Abstract:

为了减少饮用水中三卤甲烷(thms)的生成,采用二氧化氯预氧化取代传统的预氯化.采用自制的二氧化氯,其纯度在99%以上,在避光/封口的条件下,投加2mg/l的二氧化氯与原水反应30min.通过超滤膜法分析不同分子量区间三卤甲烷生成势(thmfp)的变化,发现大部分小分子物质被氯化生成thms,经二氧化氯氧化后,发现不同分子量区间的thmfp均有所降低,且部分大分子物质变为小分子物质,这些物质较难与氯发生反应生成thms,说明thms的生成不仅与分子量有关还与分子结构相关.另外,二氧化氯预氧化对色度和浊度都有比较明显的去除效果.

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