嵌段阳离子絮凝剂的制备及其对藻源水样的处理  

Preparation of Block Cationic Flocculants for Treatment of Algal Water

作　　者：何俊 陈伟 苏凯 HE Jun;CHEN Wei;SU Kai(Hanyuan Ecological Environmental Monitoring Station of Yaan,Yaan 625300,China;College of Civil Engineering,Sichuan Agricultural University,Chengdu 611830,China;Faculty of Geosciences&Environmental Engineering,SouthwestJiaotong University,Chengdu 611756,China)

机构地区：[1]雅安市汉源生态环境监测站,四川雅安625300 [2]四川农业大学土木工程学院,四川成都611830 [3]西南交通大学地球科学与环境工程学院,四川成都611756

出　　处：《水处理技术》2025年第3期80-86,共7页Technology of Water Treatment

基　　金：雅安市2022年度高层次人才科研项目(22YGDY0018);雅安市2023年哲学社会科学研究规划项目(YAB2023001)。

摘　　要：以丙烯酰胺(AM)、丙烯酰氧乙基三甲基氯化铵(DMC)、瓜尔胶(GG)、马来酸酐和聚丙烯酸钠(PAAS)为原料,采用酰化接枝与模板调控技术,合成具有阳离子微嵌段、高特性粘度和结构稳定的絮凝剂CPAG-AB,用于藻源水源处理,考察了该絮凝剂最优合成参数、对藻源水最佳絮凝应用参数及絮凝机理。结果表明:通过特性粘度、H^(1)NMR、XPS等分析,一种具有拟定结构特征的絮凝剂CPAG-AB被成功合成。该絮凝剂对实际湖泊藻源水样浊度去除率96.7%,残留叶绿素a 27μg/L。CPAG-AB絮体抗破碎强度(S_(f) 0.662)和再生性能(R_f 0.662)具有显著优势。絮凝机理表明,较高的分子量和结构稳定性可提高絮凝剂的网捕架桥/卷扫和抗破碎能力,而阳离子微嵌段结构可强化其电中和-吸附与再生能力和提升絮凝性能。本文不仅为絮凝剂开发开辟了新思路,同时可为富营养化河湖治理提供支持。In this study,a cationic microblock flocculant(CPAG-AB),characterized by high intrinsic viscosity and structural stability,was synthesized from acrylamide(AM),acryloxyethyl trimethyl ammonium chloride(DMC),guar gum(GG),maleic anhydride,and sodium polyacrylate(PAAS)using acylation grafting and template control technology.This flocculant was then applied to purify algal water,optimizing both synthesis conditions and application parameters.The structure of CPAG-AB was confirmed by intrinsic viscosity measurements,^(1)H NMR,and XPS analyses.Under optimal conditions,CPAG-AB achieved 96.7%turbidity removal and reduced the residual chlorophyll-a concentration to 27μg/L.Moreover,its breakage-resistance strength factor(S_(f)=0.662)and regeneration factor(Rf=0.662)exhibited significant advantages.Mechanistic studies revealed that the high molecular weight and stable structure strengthened the bridging/sweeping and breakage resistance,whereas the cationic microblock enhanced electric neutralization,adsorption,and regeneration,thereby improving the overall flocculation performance.This research not only suggests a novel approach for the development of flocculants but also offers robust support for mitigating eutrophication in rivers and lakes.

关 键 词：藻源水样 絮凝剂 阳离子聚丙烯酰胺 絮凝机理 

分 类 号：X524[环境科学与工程—环境工程] TQ421[化学工程]