过硫酸钾—偶氮复合引发体系合成杂化高分子絮凝剂PACS-PAM及其表征与应用

发布时间：2018-01-10 01:35

本文关键词：过硫酸钾—偶氮复合引发体系合成杂化高分子絮凝剂PACS-PAM及其表征与应用　出处：《重庆大学》2015年硕士论文　论文类型：学位论文

【摘要】：以絮凝沉淀法为基础的水处理工艺在当前的水处理行业中占着十分重要的地位,作为絮凝沉淀法技术核心的絮凝剂的絮凝性能好坏直接关系到水处理效果的优劣以及水处理工艺的运营成本的高低,因此开发新型高效环保的絮凝剂是十分有意义的。采用原位聚合法,以过硫酸钾(K2S2O8)-偶氮二异丁咪唑啉盐酸盐(VA-044引发剂)复合引发体系合成了聚硫氯化铝-聚丙烯酰胺(PACS-PAM)杂化高分子絮凝剂。以特性黏度为指标,考察了引发剂配比、引发剂总用量、单体质量浓度、总铝浓度(AlT)、反应温度、反应时间等因素对合成杂化絮凝剂PASC-PAM的影响,确定了合成杂化絮凝剂PACS-PAM时上述各因素的最佳水平。电导率分析、红外光谱(FTIR)分析、热重-差热(DTA-TGA)分析表明杂化絮凝剂中有机组分同无机组分是通过PAM分子链端的硫酸根离子(-SO42-)的桥连作用以离子键形式连接的。扫面电镜分析表明杂化絮凝剂PASC-PAM同复配絮凝剂PASC-PAM有着本质的形态结构差别。对该絮凝剂的絮凝性能进行了实验研究,实验结果表明:在用于水体除浊时,合成杂化絮凝剂PASC-PAM时控制总铝浓度为0.20mol/L是最为合适的,该杂化絮凝剂较适宜的原水p H范围为6到10之间,较适宜的原水温度范围为15℃到45℃之间;在处理1000NTU的高浊模拟水样时,杂化絮凝剂PASC-PAM的最佳投加量小于复配絮凝剂PASC-PAM的最佳投加量,并且在最佳投加量下,杂化絮凝剂PASC-PAM的絮凝效果也是优于复配絮凝剂PASC-PAM的;在处理20NTU的低浊模拟水样时,杂化絮凝剂PASC-PAM的最佳助凝投加量小于普通PAM的最佳助凝投加量,且在最佳助凝投加量下杂化絮凝剂PASC-PAM的助凝效果要优于普通的PAM。在用于污泥脱水时,合成杂化絮凝剂PASC-PAM时控制总铝浓度为0.15mol/L是最为合适的;该杂化絮凝剂较适宜的污泥原始p H范围为6到8之间,较适宜的污泥原始温度范围为15℃到45℃之间;杂化絮凝剂PASC-PAM同阳离子PAM均有较好的污泥脱水效果,阳离子PAM对污泥的脱水效果要略优于杂化絮凝剂PASC-PAM,但从经济方面考虑杂化絮凝剂PASC-PAM是一种更适合用于污泥脱水的絮凝剂。
[Abstract]:Water treatment technology with flocculation based occupies a very important position in the water treatment industry in the current, as flocculant flocculation core technology of flocculation performance is directly related to the level of the water treatment effect and the quality of the water treatment process of operating costs, so the development of a new type flocculant is very efficient environmental protection meaning. By in-situ polymerization with potassium persulfate (K2S2O8) azo two isobutyl imidazoline hydrochloride (VA-044 initiator) polysulfide aluminum chloride was prepared by composite initiator system (PACS-PAM) high molecular flocculant. The hybrid viscosity index, the effects of initiator ratio, initiator dosage, monomer the body mass concentration, total aluminium concentration (AlT), reaction temperature, reaction time and other factors on the synthesis of hybrid flocculant PASC-PAM, the synthesis of hybrid flocculant PACS-PAM on the above factors The best level. The conductivity analysis, infrared spectroscopy (FTIR) analysis, thermogravimetric (DTA-TGA) analysis showed that the hybrid flocculant of organic components in the same inorganic component by sulfate ion PAM molecular chain end (-SO42-) of the bridge connecting to form ionic bonds. SEM analysis showed that the hybrid flocculant PASC-PAM with PASC-PAM compound flocculant have different morphology essence. The flocculation performance of the flocculant was studied. The experimental results show that: in the water for the removal of turbidity, total aluminium concentration control synthesis hybrid flocculant when PASC-PAM 0.20mol/L is the most suitable, the hybrid flocculant suitable raw water P range between H 6 to 10, the water temperature range suitable for 15 DEG to 45 DEG C; in high turbidity water treatment 1000NTU simulation, the optimal dosage of PASC-PAM hybrid flocculant dosage less than composite flocculant PASC-PAM Quantity, and under the optimal dosage, flocculation effect of flocculant PASC-PAM is better than the hybrid composite flocculant PASC-PAM; simulated water samples in dealing with 20NTU and low turbidity, the best coagulant coagulation best hybrid flocculant PASC-PAM dosage less than the dosage of PAM, and the best coagulant coagulation effect of investment the hybrid flocculant PASC-PAM dosage is better than the ordinary PAM. used in sludge dewatering, control the total aluminum concentration PASC-PAM for 0.15mol/L synthesis of hybrid flocculant is the most suitable; the hybrid flocculant is suitable for sludge H original P range is between 6 to 8, the original sludge suitable temperature range is 15 DEG C to 45 C; sludge dewatering with cationic PAM flocculant PASC-PAM hybrid has better effect on sludge dewatering effect of cationic PAM flocculant is superior to hybrid PASC-PAM, but from the economic aspects of hybrid flocculant PASC-PA M is a more suitable flocculant for sludge dewatering.

【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X703

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