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CN102266650B 一种利用添加FeCl2·6H2O的偏高岭土基矿物聚合物解毒及固化Cr（Ⅵ）的方法 有权 转让

一种利用添加FeCl2·6H2O的偏高岭土基矿物聚合物解毒及固化Cr（Ⅵ）的方法
摘要：
本发明提供一种利用添加FeCl2·6H2O的偏高岭土基矿物聚合物解毒及固化Cr（Ⅵ）的方法，它包括如下步骤：1）将偏高岭土分次加入碱性激发剂溶液中，搅拌均匀，得到混合溶液；2）再依次加入Cr（Ⅵ）和FeCl2·6H2O至步骤1）所得混合溶液中并混合均匀，其中，所述Cr（Ⅵ）的加入量小于等于步骤1）所得混合溶液质量的0.8%，所述FeCl2·6H2O的加入量小于等于步骤1）所得混合溶液质量的12%，FeCl2·6H2O和Cr（Ⅵ）的质量比大于等于13；3）将步骤2）得到的溶液依次入模、固化、脱模及养护，得到固定有Cr的矿物聚合物。该方法环保、铬固化率高、且适用于控制酸溶性Cr。
摘要（英）：

The invention provides a method for detoxifying and curing Cr(VI) by using FeCl2.6H2O added metakaolin based geopolymer, comprising the following steps of: (1) adding metakaolin to an alkali activator solution gradually, stirring uniformly to obtain a mixed solution; (2) adding Cr(VI) and FeCl2.6H2O sequentially to the mixed solution obtained in the step (1) and mixing uniformly, wherein the addition of the Cr(VI) is less than or equal to 0.8% by mass of the mixed solution obtained in the step (1), the addition of the FeCl2.6H2O is less than or equal to 12% by mass of the mixed solution obtained in the step (1), and the mass ratio of the FeCl2.6H2O to the Cr(VI) is greater than or equal to 13; and (3) sequentially molding, curing, demolding and aging the solution obtained in the step (2) to obtain the Cr fixed geopolymer. The method provided by the invention has a high chromium curing rate and is environment-friendly and suitable for controlling acid soluble Cr.

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