Graduate School of Environmental Studies, Tohoku University, 6-6-20 Aoba, Aramaki-aza, Aoba-ku, Sendai 980-8579, Japan.
J Hazard Mater. 2011 Jan 30;185(2-3):858-61. doi: 10.1016/j.jhazmat.2010.09.099. Epub 2010 Oct 20.
A novel composite for the removal of color in waste water was prepared by subjecting slurries consisting diatomaceous earth and slaked lime to a hydrothermal reaction at 180 °C. Subsequently, calcium silicate hydrate gels covered the surface of diatomaceous earth due to the reaction between the amorphous silica of diatomaceous earth and slaked lime. The formation of calcium silicate hydrate gels led to an increase in the specific surface area. The composites showed higher methylene blue adsorption capacity compared with diatomaceous earth. The improved adsorption capacity of the composites depended on the amount of the calcium silicate hydrate gels and their silicate anion chain-lengths.
一种用于去除废水中颜色的新型复合材料是通过将硅藻土和熟石灰的泥浆在 180°C 下进行水热反应制备的。随后，由于硅藻土的无定形硅与熟石灰之间的反应，硅酸钙水合凝胶覆盖在硅藻土的表面。硅酸钙水合凝胶的形成导致比表面积增加。与硅藻土相比，复合材料显示出更高的亚甲蓝吸附能力。复合材料吸附能力的提高取决于硅酸钙水合凝胶的量及其硅酸盐阴离子链长。
