赤泥吸附结晶紫的研究

以山东赤泥为吸附材料,静态吸附法批量实验了温度、投加量、pH、接触时间、初始质量浓度(ρ0)等因素对含结晶紫废水的吸附效果.结果表明:在30℃,赤泥投加量为4g/L、pH为12、接触时间为2h的条件下,对含500mg/L的结晶紫染料溶液的去除率为95%,吸附量为119mg/g;赤泥吸附结晶紫热力学性质与Henry型吸附等温线吻合,热力学参数计算结果表明,吸附符合自发吸热过程;赤泥吸附结晶紫动力学过程符合一级动力学模型.

Experimental Study on Adsorption of Crystal Violet by Red Mud

The red mud as an adsorbent was used to remove the crystal violet from wastewater. Batch adsorption studies were carried out on the adsorption of crystal violet as a function of temperature,adsorbent dose,pH,contact time and initial crystal violet concentration. The results indicate that the crystal violet of adsorption capacity was 119 mg/g and removal rate was 95%,while by contact time was 2 h,the dosage was 4 g/L,pH at 12 and initial concentration was 500 mg/L. The first-order model and Henry isotherm was well fitted to the adsorption crystal violet. The calculated thermodynamic parameters suggested that the adsorption of crystal violet onto red mud was spontaneous and endothermic in nature.