Abstract

A direct preparation method for a powdered geopolymer was developed using polyvinyl alcohol as a dispersant template. Metakaolin obtained by calcination of kaolinite at 600 or 750°C was used as silica-alumina source. Powdered samples with average particle sizes of 44.2 and 42.0 µm were prepared from the metakaolin calcined at 600 and 750°C, respectively. The sample prepared from metakaolin calcined at 750°C consisted of geopolymer, while the sample prepared from metakaolin calcined at 600°C consisted of a mixed phase of unreacted metakaolin and geopolymer. The sample prepared from metakaolin calcined at 750°C showed higher Cu(II) cation adsorption ability. The adsorption amount of Cu(II) cation was 40.8 mg/g, which is comparable to the adsorption capacity of the geopolymer prepared by the conventional method.

中文翻译：

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以聚乙烯醇为分散模板剂直接制备粉状地质聚合物及其对Cu(II)阳离子的吸附能力

摘要

开发了一种以聚乙烯醇为分散剂模板的粉状地质聚合物的直接制备方法。通过在 600 或 750°C 下煅烧高岭石获得的偏高岭土用作二氧化硅-氧化铝源。分别由在 600 和 750°C 下煅烧的偏高岭土制备平均粒径为 44.2 和 42.0 µm 的粉末样品。偏高岭土在 750°C 煅烧制备的样品由地质聚合物组成，而由偏高岭土在 600°C 煅烧制备的样品由未反应的偏高岭土和地质聚合物的混合相组成。由在 750°C 煅烧的偏高岭土制备的样品显示出更高的 Cu(II) 阳离子吸附能力。Cu(II)阳离子的吸附量为40.8 mg/g，与常规方法制备的地质聚合物的吸附量相当。