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Journal AWWA - Removal of Soluble Manganese by Oxide-Coated Filter Media: Sorption Rate and Removal Mechanism Issues AWWA期刊-氧化物涂层过滤介质去除可溶性锰:吸附速率和去除机理问题
发布日期: 1991-08-01
开展这项研究是为了更好地理解氧化物涂层过滤器中锰(II)的去除机理。MnOx(s)涂层滤料吸附Mn(II)的动力学被量化为溶液pH值、MnOx(s)表面浓度和过滤器应用水的游离氯浓度的函数。锰(II)的吸附速率与过滤器内可用表面吸附位置的数量呈正相关。游离氯在确定锰(II)去除率和最终程度方面起着非常重要的作用。向过滤器中添加氯气,使吸附的Mn(II)氧化,从而使介质表面不断再生。在没有游离氯的情况下,锰(II)的去除仅通过吸附; 没有发现Mn(II)自动氧化的证据。本工程在水处理设施运行中的实际应用涉及氧化剂投加位置的选择、对过滤水力的影响以及介质生成要求的确定。包括10个参考文献、表格和图表。
Research was conducted to provide a better understanding of the mechanisms of Mn(II) removal in oxide coated filters. The kinetics of Mn(II) sorption by MnOx(s)-coated filter media were quantified as a function of solution pH, MnOx(s) surface concentration, and free chlorine concentration of the filter-applied water. Rate of Mn(II) sorption was positively correlated to the number of available surface adsorption sites within a filter. Free chlorine had a very significant role in defining both the rate and ultimate extent of Mn(II) removal. Addition of chlorine to the filter-applied water oxidized the adsorbed Mn(II), thereby continually regenerating the media surface. In the absence of free chlorine, Mn(II) removal was by adsorption only; no evidence of auto-oxidation of Mn(II) was noted. Practical applications of the work to the operation of water treatment facilities concern the selection of oxidant dosing locations, the impact on filtration hydraulics, and the determination of media generation requirements. Includes 10 references, tables, figures.
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发布单位或类别: 美国-美国给水工程协会
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