粉煤灰基质滤料对水中亚甲基蓝的吸附研究

Study on Adsorption of Methylene Blue in Water with Fly Ash Filter Material

通过粉煤灰基质滤料对亚甲基蓝进行的静态吸附实验,探究了pH值、吸附时间、吸附剂投加量对亚甲基蓝吸附效果的影响。结果表明,pH和吸附时间对吸附效果影响较小,吸附速率满足Lagergren二级动力学方程,二级吸附速率常数为7.1572 g.(mg.min)-1。投加量对吸附效果影响较大,在50 mL初始浓度为100 mg.L-1亚甲基蓝溶液中投加0.3 g滤料时,单位吸附量为16.4 mg.g-1,去除率达到98.56%。

Adsorption characteristic of methylene blue with fly ash filter material was studied through static adsorption experiment. The influence of pH value, adsorption time and absorbent dosage on adsorption was investigated. The results indicated that pH value and adsorption time had little effect on methylene blue adsorption. Adsorption rate complied to Lagergren secondorder kinetics model with an adsorption constant of 7.1572 g/ （mg-min）. Dosage affected adsorption process greatly. Unit adsorption capacity and removal ratio attained 16.4 mg/g and 98.56 % respectively when 0.3 g filter material was dosed to 50 mL solution with initial concentration of 100 mg/L.