本文選題：微囊藻毒素 + MC-LR��； 參考：《吉林建筑大學(xué)》2015年碩士論文

【摘要】：微囊藻毒素是由微囊藻、顫藻、魚腥藻、念珠藻等藻屬產(chǎn)生的一種單環(huán)七肽肝毒素,它的制毒機(jī)理主要是對肝臟造成損傷、促腫瘤作用及抑制蛋白磷酸酶,藻毒素是迄今發(fā)現(xiàn)的最強(qiáng)的肝腫瘤促進(jìn)劑。且藻毒素具有極強(qiáng)的穩(wěn)定性,自然條件下降解速率極低,常規(guī)的水處理工藝對藻毒素的去除效果并不理想。針對藻毒素難降解、高致病性的特點,本文采用臭氧及其聯(lián)用工藝對MC-LR的去除效果進(jìn)行分析,用以解決藻類高峰期造成的飲用水中MC-LR污染問題,對改善人們的飲用水安全具有十分重要的意義。本文針對北方某水源地飲用水進(jìn)行藻類培養(yǎng)分析,模擬由于夏季高溫條件下藻類爆發(fā)造成MC-LR污染問題,采用臭氧及其聯(lián)用工藝對MC-LR進(jìn)行去除分析。實驗結(jié)果表明臭氧對MC-LR具有良好的去除效果,2mg/L臭氧單獨使用時,MC-LR的去除率達(dá)到了65.28%,對濁度與UV254的去除率為30.94%及40.63%,對TOC及CODMn的去除率為11.76%及8.71%。且較低的p H值有利于MC-LR的去除,但不利于濁度、UV254、TOC、CODMn的去除,延長反映時間有利于對MC-LR及濁度、UV254、TOC、CODMn的去除。臭氧與粉末活性炭聯(lián)用時,2mg/L臭氧與20mg/L粉末活性炭聯(lián)用,對MC-LR的去除率為84.34%,對濁度及UV254的去除率為75.47%與50%,對TOC及CODMn的去除率為36.31%與42.86%。結(jié)果表明,臭氧與粉末活性炭聯(lián)用對MC-LR及濁度、UV254、TOC、CODMn去除效果都較單獨使用臭氧有顯著增強(qiáng)。臭氧與聚合氯化鋁聯(lián)用時,投加2mg/L臭氧與20mg/L聚合氯化鋁,對MC-LR的去除率為90.32%,對濁度及UV254的去除率為81.06%與60.63%,對TOC及CODMn的去除率為35.19%與62.86%。較單獨使用臭氧去除效果明顯增強(qiáng),且對MC-LR、濁度、UV254、CODMn效果優(yōu)于臭氧與粉末活性炭聯(lián)用工藝,對TOC去除效果與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.
【學(xué)位授予單位】：吉林建筑大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU991.2;X52

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