Direct Preparation of Powdered Geopolymer Using Polyvinyl Alcohol as Dispersant Template and Its Cu(II) Cation Adsorption Capacity
Direct Preparation of Powdered Geopolymer Using Polyvinyl Alcohol as Dispersant Template and Its Cu(II) Cation Adsorption Capacity
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DOI：
10.1134/s108765962102005x
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发表时间：
2021-03
影响因子：
0.7
通讯作者：
Teruhisa Hongo;Ayako Baba
中科院分区：
文献类型：
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作者：
Teruhisa Hongo;Ayako Baba
摘要以聚乙烯醇为分散剂模板剂，研究了一种直接制备粉状地质聚合物的方法。将通过在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度为44.2和42.0 μm的粉末样品。由在750°C下煅烧的偏高岭土制备的样品由地质聚合物组成，而由在600°C下煅烧的偏高岭土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40.8mg/g，这与通过常规方法制备的地质聚合物的吸附能力相当。
AbstractA 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.