黏土吸附-絮凝沉淀去除水中亚甲基蓝和罗丹明B

Removal of Methylene Blue and Rhodamine B from Aqueous Solutions by the Combination of Clay Minerals' Adsorption and Coagulation-flocculation

研究了黏土吸附-絮凝沉淀联用方法对水中亚甲基蓝和罗丹明B的去除效果。探讨了黏土矿物与絮凝剂类型、作用时间、黏土矿物投加量和染料初始浓度对处理效果的影响。结果表明结合累托石对2种染料良好的吸附效果和聚合氯化铝(PAC)/聚丙烯酰胺(PAM)的絮凝沉淀作用,该联用方法可以简单、快速、高效地去除2种染料。亚甲基蓝和罗丹明B的初始浓度为10 mg/L,吸附时间6min,累托石1 g/L,PAC 200 mg/L,PAM 20 mg/L条件下,亚甲基蓝和罗丹明B的去除率分别达到99.2%和96.9%。

The potential ability of removal of methylene blue and rhodamine B from aqueous solutions by the combination of clay minerals' adsorption and coagulation-flocculation were investigated in this work. The effects of clay minerals and flocculant type, contact time, clay minerals dosage and initial concentration of dyes on the removal efficiency were studied and described in detail. The experimental results demonstrated that dyes could be efficiently removed because of the combina-tion of high adsorption of dyes on clay minerals and the fast by PAC/PAM. Under the experimental condition of rectorite 1g/L,contact time 6 min, PAC 200 mg/L and PAM 20 mg/L, The removal efficiencies were respectively 99.2 % and 96.9% for methylene blue and rhodamine B with an initial concentration of 10 mg/L.