The high value utilization of lignin is facing sheer challenge, and the use of lignin as a raw material to prepare flocculants is of tremendous significance for wastewater treatment. In this study, lignin-based flocculants (LBFs) with tunable performances were prepared by mild copolymerization of lignosulfonate and [2-(Methacryloyloxy) ethyl] trimethylammonium chloride solution (METAC) under short-wavelength ultraviolet light. The effect of preparation conditions on the product performances was investigated, and two classes of LBFs were obtained in the same system by adjusting the preparation conditions. As compared with the preparation of LBFs suitable for simulated dye wastewater, higher monomer dose and lower pH were required for the preparation of LBFs suitable for kaolin and E. coli suspensions. Among them, LBF-1 could remove more than 95 % dye, and LBF-2 had 99.2 % and 97.5 % turbidity and bacterial removal rates, respectively. Moreover, the effects of external factors such as the LBF-1 dose, initial concentration of dye and wastewater pH on the decolorization efficiency were also explored. In addition, the sterilization function of LBF was studied, and LBF-2 experienced a process of first flocculation followed by sterilization. Furthermore, the flocculation mechanisms of LBFs in treating three kinds of wastewaters were discussed in detail.

木质素的高价值利用面临着严峻的挑战，以木质素为原料制备絮凝剂对废水处理具有重要意义。在这项研究中，木质素基絮凝剂（LBFs）是通过在短波长紫外光下将木质素磺酸盐和[2-（甲基丙烯酰氧基）乙基]三甲基氯化铵溶液（METAC）温和共聚制备的。研究了制备条件对产品性能的影响，通过调整制备条件，在同一系统中获得了两类LBF。与适合于模拟染料废水的LBF的制备相比，适合于高岭土和大肠杆菌悬浮液的LBF的制备需要更高的单体剂量和更低的pH值。其中，LBF-1可以去除95％以上的染料，而LBF-2的浊度和细菌去除率分别为99.2％和97.5％。此外，还探讨了LBF-1用量，染料的初始浓度和废水pH值等外部因素对脱色效率的影响。此外，研究了LBF的灭菌功能，并且LBF-2经历了先絮凝然后灭菌的过程。此外，还详细讨论了LBFs处理三种废水的絮凝机理。LBF-2经历了先絮凝然后灭菌的过程。此外，还详细讨论了LBFs处理三种废水的絮凝机理。LBF-2经历了先絮凝然后灭菌的过程。此外，还详细讨论了LBFs处理三种废水的絮凝机理。