等离子体引发壳聚糖基絮凝剂及其脱色性能  

Plasma-initiated Chitosan-based Flocculant and Its Decolorization Performance

作　　者：王莫茜 郑怀礼[1,2] 刘永芝 刘霜 安延严 孙强 WANG Moxi;ZHENG Huaili;LIU Yongzhi;LIU Shuang;AN Yanyan;SkIN Qiang(School of Urban Construction and Environmental Engineering,Chongqing University,Chongqing400045,China;Chongqing Engineering Research Center of Water Treatment Coagulant,Chongqing400045,China)

机构地区：[1]重庆大学城市建设与环境工程学院 [2]重庆市水处理混凝剂工程技术研究中心,重庆400045

出　　处：《水处理技术》2018年第12期30-34,40,共6页Technology of Water Treatment

基　　金：国家自然科学基金(21477010);中央高校基本科研业务(106112017 CDJXSYY0001)

摘　　要：采用等离子体引发壳聚糖(CTS)、丙烯酰胺(AM)和甲基丙烯酰氧乙基三甲基氯化铵(DMC)接枝共聚,制备了壳聚糖基絮凝剂CTS-g-P(AM-DMC),分别探讨了总单体含量、壳聚糖含量、放电时间、后聚合温度、后聚合时间对CTS-g-P(AM-DMC)接枝效率的影响,并优化了合成条件。采用红外光谱分析和扫描电镜分析对其进行表征,并以活性艳蓝KN-R染料废水来验证其脱色性能。结果表明,总单体的质量分数15%、壳聚糖的质量分数12%、放电时间120 s、后聚合温度70℃,后聚合时间24 h,优化后聚合产物的接枝效率最高可达到68%。优化脱色条件为:絮凝剂投加量200 mg/L,pH=4.0,KN-R初始质量浓度100 mg/L,CTS-g-P(AM-DMC)的脱色性能显著优于单独使用CTS。CTS-g-P(AM-DMC) flocculant was graft copolymerized of chitosan(CTS), acrylamide(AM) and methacryloyloxyethyl trimethyl ammonium chloride(DMC) by plasma-initiation. The effects of total monomer concentration, percentage of chitosan, discharge time, post-polymerization temperature and post-polymerization time on the grafting efficiency of CTS-g-P(AM-DMC) were investigated, and the synthesis conditions were optimized. Infrared spectroscopy and scanning electron microscopy were used to characterize the graft copolymer, reactive brilliant blue KN-R dye wastewater was used to verify its decolorization performance. The results showed that, when the total monomer mass fraction was 15%, the mass fraction of chitosan was 12%,discharge time was 120 s, post polymerization temperature was 70 ℃, post polymerization time was 24 h, the maximum grafting efficiency was 68% after optimization. The optimal decolorization conditions were as follow, the flocculant dosage was 200 mg/L, the pH was 4.0, the initial mass concentration of KN-R was 100 mg/L, and the decolorization performance of CTS-g-P(AM-DMC) was significantly excellent than that of CTS alone.

关 键 词：壳聚糖基絮凝剂 壳聚糖 等离子体 接枝共聚 脱色 

分 类 号：X703.1[环境科学与工程—环境工程]