阳离子改性淀粉絮凝剂的制备及性能探讨  

Preparation and Performance Investigation of Cationic Modified Starch Flocculant

作　　者：魏惠荣 牛腾 姜立萍 李珍 WEI Hui-rong;NIU Teng;JIANG Li-ping;LI Zhen(College of Chemical Engineering,Lanzhou University of Arts and Science,Lanzhou 730000,China)

机构地区：[1]兰州文理学院化工学院,甘肃兰州730000

出　　处：《兰州文理学院学报(自然科学版)》2025年第1期90-95,共6页Journal of Lanzhou University of Arts and Science(Natural Sciences)

基　　金：2024年高校教师创新基金项目(2024A-198);兰州文理学院博士专项基金项目(2022BSZH01);甘肃省自然科学基金项目(20JR10RA144);甘肃省大学生创新创业训练计划项目(S202211562034,S202211562031,S202211562026,S202211562012)。

摘　　要：以玉米淀粉为主要原材料,使用丙烯酰胺和2,3-环氧丙基三甲基氯化铵为接枝共聚单体,制备高效低毒的阳离子改性淀粉絮凝剂.以接枝率和接枝效率为目标函数,设计了单因素实验和正交实验,探讨了本实验的最佳制备条件,随后通过高岭土模拟废水水样来探索实验产物的最佳絮凝环境.实验表明:当醚化剂用量为0.8 g/L,NaOH用量为0.1 g,反应温度为60℃,反应时间为3 h时,接枝率达到80%,接枝效率达到81%.用高岭土废水模拟水样的测试时,在40℃的弱碱环境中产品的絮凝效果最佳,其絮凝率可达94%.Modified cationic flocculants with high efficiency and low toxicity were prepared from corn starch with acrylamide and 2,3-epoxy-propyl trimethyl ammonium chloride as grafted copolymers.Taking grafting rate and grafting efficiency as objective functions,single factor experiment and orthogonal experiment were designed to explore the optimal preparation conditions of the experiment,and then the optimal flocculation environment of the experimental products was explored through kaolin simulated wastewater samples.The experimental results showed that when the dosage of etherifying agent GTA was 0.8 g/L,the dosage of NaOH was 0.1 g,the reaction temperature was 60℃,and the reaction time was 3 h,the grafting rate reached 80% and the grafting efficiency reached 81%.In the test of kaolin wastewater simulation water sample,the flocculation effect of the product is the best in the weak alkali environment at 40℃,and the flocculation rate can reach 94%.

关 键 词：阳离子改性淀粉絮凝剂 高岭土模拟废水 絮凝率 接枝率 

分 类 号：O6[理学—化学] X703[环境科学与工程—环境工程]