臭氧预氧化及其联用工艺对微囊藻毒素的去除研究

发布时间：2018-04-13 01:27

本文选题：微囊藻毒素 + MC-LR　；参考：《吉林建筑大学》2015年硕士论文

【摘要】：微囊藻毒素是由微囊藻、颤藻、鱼腥藻、念珠藻等藻属产生的一种单环七肽肝毒素,它的制毒机理主要是对肝脏造成损伤、促肿瘤作用及抑制蛋白磷酸酶,藻毒素是迄今发现的最强的肝肿瘤促进剂。且藻毒素具有极强的稳定性,自然条件下降解速率极低,常规的水处理工艺对藻毒素的去除效果并不理想。针对藻毒素难降解、高致病性的特点,本文采用臭氧及其联用工艺对MC-LR的去除效果进行分析,用以解决藻类高峰期造成的饮用水中MC-LR污染问题,对改善人们的饮用水安全具有十分重要的意义。本文针对北方某水源地饮用水进行藻类培养分析,模拟由于夏季高温条件下藻类爆发造成MC-LR污染问题,采用臭氧及其联用工艺对MC-LR进行去除分析。实验结果表明臭氧对MC-LR具有良好的去除效果,2mg/L臭氧单独使用时,MC-LR的去除率达到了65.28%,对浊度与UV254的去除率为30.94%及40.63%,对TOC及CODMn的去除率为11.76%及8.71%。且较低的p H值有利于MC-LR的去除,但不利于浊度、UV254、TOC、CODMn的去除,延长反映时间有利于对MC-LR及浊度、UV254、TOC、CODMn的去除。臭氧与粉末活性炭联用时,2mg/L臭氧与20mg/L粉末活性炭联用,对MC-LR的去除率为84.34%,对浊度及UV254的去除率为75.47%与50%,对TOC及CODMn的去除率为36.31%与42.86%。结果表明,臭氧与粉末活性炭联用对MC-LR及浊度、UV254、TOC、CODMn去除效果都较单独使用臭氧有显著增强。臭氧与聚合氯化铝联用时,投加2mg/L臭氧与20mg/L聚合氯化铝,对MC-LR的去除率为90.32%,对浊度及UV254的去除率为81.06%与60.63%,对TOC及CODMn的去除率为35.19%与62.86%。较单独使用臭氧去除效果明显增强,且对MC-LR、浊度、UV254、CODMn效果优于臭氧与粉末活性炭联用工艺,对TOC去除效果与臭氧粉末活性炭基本一致。
[Abstract]:Microcystin is a monocyclic heptapeptide hepatotoxin produced by microcystis, fibrillates, Anabaena, rosary, etc. Its toxic mechanism is mainly to damage the liver, promote tumor and inhibit protein phosphatase.Algin is the strongest liver tumor promoter found so far.The algal toxin has strong stability and the degradation rate is very low under natural conditions. The removal effect of algal toxin by conventional water treatment process is not ideal.In order to solve the problem of MC-LR pollution in drinking water caused by algae peak period, the removal effect of MC-LR was analyzed by ozone and its combined process in view of the high pathogenicity and difficult degradation of algal toxins.It is of great significance to improve the safety of drinking water.In this paper, algae culture analysis was carried out for drinking water from a water source in the north, and the problem of MC-LR pollution caused by algae explosion in summer was simulated. Ozone and its combined process were used to analyze the removal of MC-LR.The experimental results show that ozone has a good removal effect on MC-LR. When ozone is used alone, the removal rate of MC-LR is 65.28%, the removal rate of turbidity and UV254 is 30.94% and 40.63%, the removal rate of TOC and CODMn is 11.76% and 8.71%.The lower pH value was beneficial to the removal of MC-LR, but not to the removal of UV254 TOCDMn, and the longer reaction time was favorable to the removal of MC-LR and turbidity UV254 TOCCODMn.The removal rate of MC-LR, turbidity and UV254 were 75.47% and 50%, and the removal rates of TOC and CODMn were 36.31% and 42.86%, respectively, when ozone combined with powdered activated carbon was used with 20mg/L powder activated carbon, the removal rate of MC-LR was 84.34%, the removal rate of turbidity and UV254 was 75.47%, and the removal rate of TOC and CODMn was 36.31% and 42.86% respectively.The results showed that the removal efficiency of MC-LR and turbidity UV254TOC CODMn by ozone combined with powdered activated carbon was significantly higher than that with ozone alone.The removal rate of MC-LR, turbidity and UV254 were 81.06% and 60.63%, respectively, and the removal rates of TOC and CODMn were 35.19% and 62.86%, respectively, when adding 2mg/L ozone and 20mg/L polyaluminum chloride in combination with ozone and polyaluminium chloride, the removal rate of MC-LR was 90.32 and that of turbidity and UV254 was 81.06% and 60.63% respectively.Compared with the single use of ozone, the removal efficiency of TOC was obviously enhanced, and the effect of turbidity UV254CODMn on MC-LR was better than that of combined use of ozone and powdered activated carbon, and the removal efficiency of TOC was basically the same as that of powdered ozone activated carbon.
【学位授予单位】：吉林建筑大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU991.2;X52

【参考文献】