羧甲基壳聚糖/二氧化锰复合絮凝剂对染色废水的脱色研究

Decolorization of dyeing wastewater using carboxymethyl chitosan-manganese dioxide complex flocculant

用羧甲基壳聚糖/二氧化锰复合絮凝剂对染色废水进行脱色处理,结果表明,影响脱色率的单因素有质量比、复合絮凝剂用量、吸附时间、pH、搅拌器转速。对这些因素采用L_(16)(4~5)进行正交试验,得出最佳工艺条件:复合絮凝剂质量比6、复合絮凝剂用量0.95 g/L、吸附时间90 min、pH=8、搅拌器转速220 r/min。在该工艺条件下,平均脱色率为95.32%。

The dyeing wastewater was decolorizated by carboxymethyl chitosan-manganese dioxide com- plex flocculant. The single factors affecting the decolorization ratio were mass ratio, dosage of complex floccu- lant, adsorption time, pH as well as agitator speed. The L16（45） orthogonal test was designed with these factors, and the optimal extraction conditions were as follows： complex flocculant mass ratio 6, dosage of complex flocculant 0.95 g/L, adsorption time 90 min, pH=8, and agitator speed 220 r/min. In this case, the average decolorization ratio was 95.32%.