阳离子淀粉基絮凝剂的制备和絮凝性能

IF 1.6 4区 工程技术 Q3 Chemical Engineering
Yuhui Shi, Yi Zheng
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引用次数: 0

摘要

为了增加玉米淀粉的比表面积并去除水中的阴离子污染物,制备了由多孔玉米淀粉(STP)、甲基丙烯氧乙基三甲基氯化铵(DMC)和二甲基二烯丙基氯化铵(DMDAAC)组成的 STP-OGG-DD,并将其用于腐植酸(HA)的絮凝。在制备过程中,硫酸亚铁和过氧化氢作为自由基的引发剂,吸引阳离子单体聚集在淀粉链上。研究了反应时间、反应温度、阳离子单体用量和引发剂对反应性能的影响。结果表明,淀粉单体的转化率为 97.69%,接枝率为 96.47%,接枝效率为 95.85%。扫描电子显微镜对 Stp-OG-DD 进行了表征,X 射线衍射和红外光谱对其结构进行了表征。在絮凝试验中。考察了 30 mg/L 不同接枝率的絮凝剂对 30 mg/L 腐植酸的絮凝效果,并研究了两者之间的关系。结果表明,淀粉接枝率高的絮凝剂对腐植酸的去除效果更好,且呈正相关。与传统的糊化法不同,采用酶水解法对淀粉进行预处理,不仅节约了能源,还扩大了分子的比表面积。此外,添加两种阳离子单体可提高淀粉的接枝效果。DMC 和 DMDAAC 可交替聚合到淀粉骨架上,为酶水解淀粉分子链提供长分子链和丰富的正电荷。除了探索反应条件下样品的接枝情况外,还利用不同条件下制备的絮凝剂絮凝 30 mg/L 腐植酸,进一步确定接枝率在去除效果中的作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Preparation and flocculation performance of a cationic starch based flocculant
To increase the specific surface area of corn starch and remove the anion contaminant in water, STP-OGG-DD, which is composed of porous corn starch (Stp), methylpropenoxyethyl trimethyl ammonium chloride (DMC) and dimethyldiallyl ammonium chloride (DMDAAC), was prepared and used for the flocculation of humic acid (HA). In this preparation, ferrous sulfate and hydrogen peroxide act as initiators for free radicals that attract cationic monomers to gather on starch chains. The effects of reaction time, reaction temperature, dosage of cationic monomer, and initiator on the reaction performance were investigated. The results showed that the conversion rate of starch monomer was 97.69 %, the grafting rate was 96.47 %, and the grafting efficiency was 95.85 %. Stp-OG-DD was characterized by scanning electron microscopy, and its structure was characterized by X-ray diffraction and infrared spectroscopy. In the flocculation test. The flocculation effect of 30 mg/L flocculants with different grafting rates on 30 mg/L humic acid was investigated, and the relationship between the two was studied. The results showed that the flocculant with a high starch grafting rate had a better removal effect on humic acid and was positively correlated. Different from the traditional gelatinization method, the enzymatic hydrolysis method is used to pretreat starch, which not only saves energy but also enlarges the specific surface area of molecules. In addition, adding two cationic monomers improved the grafting effect of starch. DMC and DMDAAC could be polymerized alternately onto the starch backbone, providing long molecular chains and abundant positive charge for enzymatic hydrolysis of starch molecular chains. In addition to exploring the grafting of samples under reaction conditions, flocculants prepared under different conditions were used to flocculate 30 mg/L humic acid to further determine the role of grafting rate in the removal effect.
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来源期刊
CiteScore
2.80
自引率
12.50%
发文量
107
审稿时长
3 months
期刊介绍: The International Journal of Chemical Reactor Engineering covers the broad fields of theoretical and applied reactor engineering. The IJCRE covers topics drawn from the substantial areas of overlap between catalysis, reaction and reactor engineering. The journal is presently edited by Hugo de Lasa and Charles Xu, counting with an impressive list of Editorial Board leading specialists in chemical reactor engineering. Authors include notable international professors and R&D industry leaders.
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