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    • 21. 发明授权
    • Process for removal of metal ions from water
    • 从水中除去金属离子的方法
    • US5211852A
    • 1993-05-18
    • US812801
    • 1991-12-23
    • Richard H. Van de WalleMark T. WajerDavid M. Smith
    • Richard H. Van de WalleMark T. WajerDavid M. Smith
    • C02F1/28C02F1/64
    • C02F1/64C02F1/281Y10S210/912Y10S210/913
    • Provided is a process for the removal of metal ions from water which comprises filtering the water through a bed or layer of granular lightburned or hardburned magnesium oxide. The use of granular hardburned or granular lightburned grades of the magnesium oxide provides one with a most effective process for the removal of metal ions, as well as a process which permits a greater throughput of water before the effectiveness of the magnesium oxide decreases substantially.The process of the present invention also involves an acidic backwash to regenerate the granular magnesium oxide. The acidic backwash is used to strip the captured metal ions from the surface of the granules, and has been found to be quite effective. The acid is generally a dilute acid, e.g., about 1 to 10 percent by weight acid concentration.
    • 提供了一种从水中除去金属离子的方法,其中包括通过床或层状的颗粒状灼烧或硬化的氧化镁过滤水分。 使用颗粒状硬化或颗粒状的烧结级别的氧化镁提供了一种除去金属离子最有效的方法,以及在氧化镁的有效性显着降低之前允许更大的水通量的方法。 本发明的方法还涉及酸性反洗以再生颗粒状氧化镁。 酸性反冲洗用于从颗粒表面剥离所捕获的金属离子,并且已经被发现是非常有效的。 酸通常是稀酸,例如约1至10重量%的酸浓度。