木质素阳离子化改性及絮凝性能研究

Study on the flocculation performance of cationic modified-lignin

对不同相对分子质量的木质素进行季铵化改性,合成木质素基阳离子絮凝剂,研究了它对活性染料、酸性染料和直接染料等废水的絮凝脱色性能.结果表明,低相对分子质量木质素的絮凝效果较好,且在一定范围内随着絮凝剂用量的增加,脱色效果增强;在p H=2时,絮凝效果最好.

Lignin-based cationic flocculant was prepared through quaternary ammoniation on different molecular weight of lignin. The flocculation decolorization characteristic of flocculant to the wastewater of reactive dyes, acid dyes and directive dyes were investigated. The results showed that the flocculant with lower molecular weight had greater flocculation property, within certain range, the decolorization effect increased with the flocculant dosage increasing, and when pH=2, the flocculation effect was the best.