Abstract:

The natural wood powder F691 has been modified by carboxymethyl reaction, grafting reaction and Mannich reaction to prepare a new amphoteric polymeric flocculant(CG-AC) . The optimum conditions for the preparation of CG-AC are determined. The result of applying CG-AC to the activated dyes Red X-3B wastewater and the mixed sludge from a papermaking mill shows: when 20 mg/L of CG-AC is used with 100 mg/L of PAC the decoloration rate can reach 68%, the effciemcy of which is obviously better than the contrast sample PAM-C. CG-AC also has better mixed sludge dewatering property in papermaking than that of PHP and PAM-C.

Key words: natural polymer modification, amphoteric polymer flocculant, printing and dyeing wastewater

摘要：

以天然植物胶粉F691为原料，通过羧甲基化、接枝共聚和曼尼奇(Mannich)三步反应合成出改性两性型絮凝剂(CG-AC)，确定了其较佳的制备条件。试验表明：20mg／LCG-AC与100mg／LPAC配合使用处理活性红模拟染料废水，脱色率可达68％，效果明显优于对比样PAM-C；CG-AC对造纸混合污泥的絮凝脱水性能优于对比样PHP和PAM-C。

关键词: 天然高分子改性, 两性高分子絮凝剂, 印染废水

CLC Number: 

• X703.1