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首页> 外文会议>1998 Joint Conference on the Environment, 1998, Mar 31-Apr 1, 1998, Albuquerque, NM >Removal of Inorganic Contaminants Using Manganese Oxide Coated Filter Media - 2
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Removal of Inorganic Contaminants Using Manganese Oxide Coated Filter Media - 2

机译：使用氧化锰涂层过滤介质去除无机污染物-2

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MnOx coated filter media has been shown capable of removing cation metals from aqueous solution with a high degree of efficiency. However, removal of anionic contaminants is less efficient. The pH_(zpc) was measured to be 2.87, which means that the coating will have net negative charge above this pH value. Therefore, the poor removal of anionic constituents is believed to be attributable to electrostatic repulsion between their negative charge and the net negative surface charge of the MnOx coated media. Polyvalent cations in solution appear to be adsorbed to the MnOx coating and partially neutralize its surface charge. Thus, it may be possible to devise strategies which can improve removal of anions by MnOx coated sand. One method might be to add polyvalent ions to solution such as Al~(3+) or Fe~(3+). Alternatively, discontinuous addition of an oxidant would allow Mn~(2+) to accumulate at the surface. Periodic addition of the oxidant would regenerate the MnOx coating.
机译：MnOx涂层过滤介质已被证明能够高效地从水溶液中去除阳离子金属。但是，去除阴离子污染物的效率较低。测量的pH_（zpc）为2.87，这意味着涂层将在该pH值之上具有净负电荷。因此，认为阴离子成分的去除不良是由于它们的负电荷与MnOx涂覆的介质的净负表面电荷之间的静电排斥。溶液中的多价阳离子似乎吸附到MnOx涂层上，并部分中和了其表面电荷。因此，有可能设计出可以改善MnOx涂层砂对阴离子的去除效果的策略。一种方法可能是将多价离子添加到溶液中，例如Al〜（3+）或Fe〜（3+）。或者，不连续地添加氧化剂将使Mn〜（2+）累积在表面。定期添加氧化剂将使MnOx涂层再生。

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