宽絮凝窗口壳聚糖改性物脱除石油污水乳化油的研究  

Modified chitosan with wide flocculation window for removing emulsified oil in petroleum wastewater

作　　者：廖彬伶 许军[1,2] 任满年 曹发海 LIAO Bin-ling;XU Jun;REN Man-nian;CAO Fa-hai(School of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China;Large Industrial Reactor Engineering Research Center of the Ministry of Education,East China University of Science and Technology,Shanghai 200237,China;Sinopec Luoyang Company,Luoyang 471003,China)

机构地区：[1]华东理工大学化工学院,上海200237 [2]华东理工大学大型工业反应器工程教育部工程研究中心,上海200237 [3]中石化洛阳分公司,河南洛阳471003

出　　处：《现代化工》2021年第2期203-208,213,共7页Modern Chemical Industry

摘　　要：以壳聚糖(CS)、丙烯酰胺(AM)和甲基丙烯酰胺丙基三甲基氯化铵(MAPTAC)为原料,通过低压紫外引发接枝共聚合成壳聚糖基阳离子絮凝剂CS-g-P(AM-MAPTAC),并用于石油污水乳化油的脱除。利用FT-IR、HNMR、SEM等对CS和CS-g-P(AM-MAPTAC)进行表征。结果表明,CS-g-P(AM-MAPTAC)的接枝率可控,其最佳制备条件为:光引发剂质量分数为0.3%、总单体质量分数为7.5%、单体质量比为25%、总单体与壳聚糖质量比为4、光照时间为120 min。同时,考察了絮凝剂用量、pH、初始油质量浓度和接枝率对CS-g-P(AM-MAPTAC)絮凝性能的影响。结果表明,与CS和市售阳离子聚丙烯酰胺(CPAM)相比,CS-g-P(AM-MAPTAC)具有更优异的絮凝性能,在初始油质量浓度为550~2 200 mg/L和p H为6~10时,除油率达到95%,表现出更宽絮凝窗口。CS-g-P( AM-MAPTAC),a chitosan-based cationic flocculant,is synthesized through low-pressure UVinitiated grafting polymerization with chitosan,acrylamide( AM) and methacrylamido propyl trimethyl ammonium chloride( MAPTAC) as raw materials,and used to remove emulsified oil in petroleum wastewater. FT-IR,1 HNMR and SEM are employed to characterize the structures of chitosan and CS-g-P( AM-MAPTAC).Results show that the grafting ratio of CS-g-P( AM-MAPTAC) is controllable. The optimal synthesis conditions are as follows: the mass fraction of photo-initiator is 0. 3%,total monomer mass fraction is 7. 5%,the mass ratio between two monomers is 25%,the mass ratio of total monomer to chitosan is 4,and illumination spends for 120 min.Effects of flocculant dosage,p H value,initial oil mass concentration and grafting ratio on the flocculation performance of CS-g-P( AM-MAPTAC) are studied. The results show that compared with chitosan and commercially available cationic polyacrylamide( CPAM),CS-g-P( AMMAPTAC) exhibits better flocculation performance.The removal ratio of oil over CS-g-P( AM-MAPTAC) reaches 95%when initial oil mass concentration is 550-2 200 mg·L-1 and p H is in the range of 6-10,showing a wide flocculation window.

关 键 词：壳聚糖 废水 接枝聚合 乳化油 絮凝 

分 类 号：TE991.2[石油与天然气工程—石油机械设备]