绿色环保型阳离子絮凝剂的制备及性能研究

发布时间：2018-01-12 01:17

本文关键词：绿色环保型阳离子絮凝剂的制备及性能研究　出处：《燕山大学》2015年硕士论文　论文类型：学位论文

【摘要】：化学混凝是水污染治理的重要举措,绿色环保絮凝剂的研发是积极推进该技术推广和应用的关键。本研究分别以花生壳和淀粉为原料,开展了绿色絮凝剂的制备,并评价了其絮凝特性。首先以花生壳为原料,甲基丙烯酰氧乙基三甲基氯化铵(DMC)为改性剂,过硫酸钾为引发剂,对花生壳中的纤维素进行改性,制备了季铵盐阳离子纤维素絮凝剂。研究了反应时间,p H和DMC/花生壳质量比对其絮凝性能的影响。结果表明,酸性环境下,DMC/花生壳质量比为2,反应时间5 h,所研制的絮凝剂在室温酸性环境下具有良好的絮凝性能。此外,絮凝剂用量,p H值,反应温度对絮凝效果也存在较为显著的影响。结果表明,对于20 g/L的高岭土悬浮液,当絮凝剂浓度为2.5 g/L,p H为1,温度为70℃时,具有较好的絮凝效果。其次,以淀粉为原料,开展了甲基丙烯酰氧乙基三甲基氯化铵(DMC)对淀粉接枝改性的研究,制备了季铵盐阳离子淀粉絮凝剂。研究了淀粉与DMC质量比、反应温度、反应时间、引发剂用量对絮凝剂接枝率的影响。实验表明最佳制备工艺参数为:DMC与淀粉质量比1:1.5、反应温度70℃、反应时间3 h、引发剂用量占反应物总致量的7%、p H为4。同时,研究了其对高岭土溶液的处置性能,实验表明,p H为4时、絮凝剂用量1.5g/L时透过率最高为88.9%;p H为7时絮凝剂用量1.5 g/L时透过率最高83.2%;p H为10时絮凝剂用量2 g/L时透过率最高为70.3%。改性淀粉絮凝剂有较宽的p H作用区间。
[Abstract]:Chemical coagulation is an important measure to control water pollution, development of green flocculant is to actively promote the key technology popularization and application. In this study peanut shell and starch as raw materials, carry out green flocculant preparation, and to evaluate its flocculation characteristics. Firstly, with peanut shell as raw material, methyl acryloyl oxygen three ethyl trimethyl ammonium chloride (DMC) as modifier, potassium persulfate as initiator of peanut shell cellulose modified quaternary ammonium cationic cellulose flocculant was prepared. The effect of reaction time, P H and DMC/ peanut shell quality than its flocculation properties. The results showed that under acidic environment peanut shell, DMC/ quality ratio is 2, the reaction time is 5 h, the flocculant has good flocculation performance at room temperature under acidic environment. In addition, dosage of flocculant, P value of H, the reaction temperature has a significant influence on the flocculation effect. Show that for kaolin suspension 20 g/L, when the flocculant concentration was 2.5 g/L, P H 1, the temperature is 70 degrees centigrade, have good flocculation effect. Secondly, using starch as raw material, carried out three methacrylatoethyl trimethyl ammonium chloride (DMC) on modified starch graft, season ammonium cationic starch flocculant were prepared on starch and DMC mass ratio, reaction temperature, reaction time, initiator dosage on the grafting rate of flocculant. The experimental results show that the optimal preparation parameters for the DMC and the mass ratio of starch to 1:1.5, the reaction temperature is 70 DEG C, the reaction time is 3 h, the dosage of initiator for reaction the total amount of 7% to 4. H P, at the same time, the research on kaolin solution disposal performance, experimental results show that the P H is 4, dosage of flocculant 1.5g/L through the highest rate of 88.9%; P H 7 g/L 1.5 dosage of flocculant through the highest rate of 83.2%; P H was 10 when the dosage of flocculant 2 g/L The highest transmittance of 70.3%. modified starch flocculant has a wider range of P H action.

【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X703.5

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