【摘要】 针对传统高分子絮凝剂结构单一、添加量大、易分解产生二次污染等缺点，采用环境友好的丙烯酸（AA）、甲基丙烯酰氧乙基三甲基氯化铵（DMC）和壳聚糖（CS）为原料，合成新型阳离子絮凝剂，并评估其对偶氮染料废水的处理效果及抗菌性能。通过水溶液自由基聚合法制备CS-g-PDA三元共聚物。利用傅里叶变换红外光谱、X射线衍射进行结构表征，采用场发射扫描电子显微镜和比表面积分析仪观察表面形貌与孔结构。通过单因素实验优化制备条件。将优化后的絮凝剂分别用于刚果红、苋菜红和酸性橙G三种单一及混合模拟废水的处理，并采用牛津杯法测试其抗菌性。结构表征显示成功合成了目标共聚物，其表面形貌有利于吸附絮凝。在优化条件下，该絮凝剂对三种偶氮染料的去除率均达到90%以上，对混合染料同样高效。牛津杯测试呈现明显抑菌圈，表明具备一定抗菌性。CS-gPDA絮凝剂克服了传统絮凝剂的不足，兼具高染料去除率与抗菌功能，是一种环境友好、性能优良的水处理材料。更多还原

【Abstract】 In view of the shortcomings of traditional polymeric flocculants,such as their simple structure,high dosage,and easy decomposition to cause secondary pollution, This study used environmentally friendly acrylate(AA), methylacryloyloxyethyl trimethylammonium chloride(DMC),and chitosan(CS) to synthesize a novel cationic flocculant. Its treatment efficacy on azo dye wastewater and antibacterial properties was evaluated. A CS-g-PDA terpolymer was prepared via radical polymerization in aqueous solution. Structural characterization was performed using Fourier transform infrared spectroscopy and X-ray diffraction, while surface morphology and pore structure were examined by field-emission scanning electron microscopy and specific surface area analysis. Preparation conditions were optimized through single-factor experiments. The optimized flocculant was applied to treat simulated wastewater containing Congo red,amaranth red,and Acid Orange G(individually or mixed),and antibacterial activity was tested via the Oxford cup method. The structure characterization shows that the target copolymer has been successfully synthesized,with surface morphology conducive to adsorption and flocculation. Under optimized conditions,the flocculant achieved>90% removal for all three azo dyes and similar efficacy for mixed dyes. The Oxford cup test revealed distinct inhibition zones,indicating antibacterial properties. The CS-g-PDA flocculant overcomes traditional flocculants’ shortcomings by combining high dye removal efficiency with antibacterial functionality, making it an environmentally friendly water treatment material with excellent performance.更多还原