用于印染废水处理的改性絮凝剂合成及其脱色性能  

Synthesis and decolorizing performance of modified flocculant for treating dyeing wastewater

作　　者：高陆玺 吕雪川 张弛 宋翰林 高肖汉 GAO Luxi;LÜXuechuan;ZHANG Chi;SONG Hanlin;GAO Xiaohan(School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun, Liaoning 113001, China)

机构地区：[1]辽宁石油化工大学石油化工学院,辽宁抚顺113001

出　　处：《纺织学报》2022年第7期121-128,共8页Journal of Textile Research

摘　　要：为提高环氧氯丙烷胺型絮凝剂的脱色性能,以二乙烯三胺为交联改性剂,环氧氯丙烷和二甲胺为原料合成改性的环氧氯丙烷-二甲胺型絮凝剂,并用于活性红X-3B模拟染料废水脱色絮凝实验。研究了投料比、反应温度、水温、pH值、染料质量浓度和絮凝剂投入量等因素对絮凝剂脱色性能的影响,探讨了与聚丙烯酰胺复配使用情况。得到改性絮凝剂制备优化条件:环氧氯丙烷、二甲胺、二乙烯三胺的量比为1∶0.95∶0.05,反应温度为90℃。同时,得到絮凝脱色的优化条件:水温为20℃,pH值为4,染料质量浓度为200 mg/L,絮凝剂投入量为125 mg/L;在此脱色优化条件下,改性絮凝剂对染料废水的脱色率达到91.0%。研究结果表明:改性絮凝剂比未改性絮凝剂有更好的脱色效果;改性剂提高了改性絮凝剂的电中和作用和架桥网捕作用;与聚丙烯酰胺的复配提高改性絮凝剂的脱色性能和耐盐性。To improve the decolorizing performance of epichlorohydrin and polyamine flocculants,the modified epichlorohydrin-dimethylamine decolorizing flocculant was prepared using diethylenetriamine as the cross-linking agent and epichlorohydrin and dimethylamine as raw materials.Its flocculating performance was studied through the flocculation experiment by using Reactive Brilliant Red X-3B as the simulated dyeing wastewater.Effects of material molar ratio,reaction temperature,water temperature,pH value,concentration of dyes and dosage of modified flocculant on the performance of the decolorant were studied.Mixed usage with polyacrylamide was also investigated.The optimized conditions to prepare the modified flocculant are that the molar ratio of epichlorohydrin to dimethylamine to diethylenetriamine is 1∶0.95∶0.05 and reaction temperature is 90℃.The optimized conditions of flocculating decolorization are that water temperature is 20℃,pH value is 4,concentration of dyes is 200 mg/L,and modified flocculant dosage is 125 mg/L.Under the optimized conditions of flocculating decolorization,the modified flocculant was used,achieving 91.0%color removal.The results indicate that the modified decolorizing flocculant shows a better performance than the unmodified decolorizing flocculant.The modifier improves the charge neutralization and bridging-netting function of the modified flocculant.Decolorization performance and salt tolerance of the modified flocculant are improved due to the mixed usage with polyacrylamide.

关 键 词：絮凝剂 环氧氯丙烷 二甲胺 二乙烯三胺 复配 脱色性能 印染废水 废水处理 

分 类 号：X703[环境科学与工程—环境工程]