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为探讨高粱秸秆处理印染废水的实际效果,以结晶紫为模拟印染废水,采用静态吸附法研究了高粱秸秆粉对结晶紫的吸附性能。实验结果表明:吸附时间、高粱秸秆粉用量、结晶紫初始浓度及pH值等对高粱秸秆粉吸附结晶紫的效果有较大影响。在35℃下,高粱秸秆粉用量0.15g,对50mL浓度为50mg/L的结晶紫溶液吸附60min,对结晶紫的吸附率可达95%以上。吸附符合Langmuir和Freundlich吸附等温式,说明高粱秸秆粉对结晶紫的吸附性能良好,吸附以单分子层物理吸附为主。其吸附过程可用Ho准二级反应动力学模型描述。
In order to investigate the practical effect of sorghum straw treatment of printing and dyeing wastewater, the adsorption of sorghum straw powder on crystal violet by static adsorption was studied using crystal violet as the simulation printing and dyeing wastewater. The experimental results showed that the adsorption time, the amount of sorghum straw powder, the initial concentration of crystal violet and pH value had a great effect on the sorption of crystal violet on sorghum stalk powder. At 35 ℃, sorghum straw powder dosage 0.15g, 50mL 50mg / L crystal violet solution adsorption 60min, the crystal violet adsorption rate of up to 95%. The adsorption was in accordance with the Langmuir and Freundlich adsorption isotherms, indicating sorption of sorghum straw powder on crystal violet was good. The adsorption was dominated by single-molecule physical adsorption. The adsorption process can be described by Ho quasi-second-order reaction kinetics model.