陶土-粉煤灰基吸附性陶瓷基体的制备及其吸附性能

以陶土和改性粉煤灰为原料，采用半干压成型工艺制备了吸附性陶瓷基体。研究了原料预处理、配比、烧成温度等对陶瓷基体性能的影响，确定了最佳制备条件：陶土和改性粉煤灰质量比8∶2，升温速率1 ℃/min，烧成温度900 ℃。在此条件下制得的陶瓷基体的孔隙率为36.75%，孔径分布区间在5～27 nm，纯水通量52.89 L/(m²·h)，压缩强度17.923MPa。对罗丹明B、亚甲蓝、刚果红模拟印染废水、含PO^3- ₄废水和含Fe²⁺废水的处理结果表明，所制备的陶瓷基体具有良好的吸附和截留性能。

Preparation and adsorption property of an adsorption clay-fly ash ceramic support

Clay and modified fly ash have been used as raw materials to prepare a ceramic support with adsorption functionality by a half-dry pressing molding process. The influence of the raw material pretreatment, ratio of raw materials and sintering temperature on the adsorption properties, porosity, and strength of the ceramic support has been studied. The optimum preparation conditions were found to be: a mass ratio of clay and modified fly ash of 8∶2,a heating rate of 1℃/min, and a sintering temperature of 900℃. Under these conditions, the porosity of the ceramic support was 36.75%, the pore size distribution was in the range of 5-27 nm, the pure water flux was 52.89 L/(m²·h), and the compressive strength was 17.923 MPa. The results of treating solutions of rhodamine B, methylene blue, and Congo red, as well as analogue printing and dyeing wastewater and solutions containing PO^3-₄ and Fe²⁺ showed that the ceramic support had good adsorption and retention properties.