以造纸黑液中的木质素为原料,通过交联反应,合成了二甲基烯丙基木质素季铵盐(DL)絮凝剂.采用FT-IR、SEM等对其进行表征,并以对酸性黑ATT的絮凝性能作为指标,通过单因素实验得出最佳合成条件.在模拟染料的条件下,测定了木质素二甲基烯丙基季铵盐对酸性黑ATT的絮凝性能,最佳温度为30℃；在pH值＝1．5的条件下,酸性黑ATT的最佳脱色率对应的浓度为3．75g/L,最佳条件下测得最大脱色率为80．06％.该改性天然高分子是一种性能良好的染料废水的絮凝剂.
Cationic flocculant,dimethylallyl quaternary ammonium salt of lignin (DL),was synthesized with al-kali lignin as raw material,using the cross linker potassium persulfate.Its character was analyzed by FT-IR, SEM and TG/DTG,and analysis of its solubility and nitrogen contents.The optimum conditions obtained by monotheism experiments were on the standard of removal rate for acid black ATT as the simulate dye,which include:m(D)∶m(L)=2∶1;5 h of reaction time and 5wt% of the potassium persulfate.The product behaved as flocculant by electrostatic interactions and bridging actions.The effects of DL on the flocculation performance of acid black ATT was investigated,which the maximum removal rate was 80.06% under the corresponding op-timal conditions (3.75 g/L of the flocculant at pH 1.5,30 ℃).This modified natural macromolecule showed a favorable flocculation performance.
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