蒙脱石颗粒吸附剂的制备及除锌研究

STUDY ON PREPARATION OF GRANULATED ABSORBENT OF MONTMORILLONITE FOR TREATMENT ZINC

以蒙脱石为原料,粉煤灰为激发剂,添加一定量的黏结剂混合造粒制成复合颗粒吸附剂,用于处理含Zn2+废水,实验研究了蒙脱石/粉煤灰混合比例、焙烧温度、添加剂用量等因素对复合颗粒强度和吸附性能的影响。研究结果表明,制备复合颗粒较佳的工艺条件为:蒙脱石与粉煤灰的混合比为6∶4,焙烧温度105℃,硅酸钠的添加比例为15%(蒙脱石/粉煤灰混合物质量)。制成的颗粒吸附剂不仅吸附效果好,而且其散失率较低。

Granulated absorbent was prepared by a mixture of montmorillonite, fly ash and a certain amount of cementing agent. The granulated absorbent was used to treat the waste water containing Zn^2＋ . The mixture ratio of montmorillonite/fly ash, the roasting temperature and the amount of cementing agent were investigated. The experimental results showed that the optimal technological conditions of preparing the composite granules were as follows： the mixture ratio of montmorillonite and fly ash was 6：4; the masting temporature was 105℃ ; and the proportion of sodium silicate was 15% of the mass of the montmorillonite/fly ash mixture. The granulated absorbent prepared under the above conditions exhibited not only high adsorptive performance but also low ratio of disintegration loss.