高铁酸钾降解污水中有机物的实验研究

发布时间：2018-01-02 17:30

本文关键词：高铁酸钾降解污水中有机物的实验研究　出处：《山东建筑大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着城市化迅速发展,国家对水环境保护的重视,污水处理技术迅速发展和提高。高铁酸钾作为一种多功能的水处理剂,具有不产生二次污染,无臭无味、氧化絮凝速度快、消毒灭菌等优点,在污水处理过程中起到了重要的作用。论文以山东建筑大学中水站的原水为研究对象,进行了高铁酸钾降解污水中有机物的试验研究,主要研究内容和结论如下。(1)在原水COD为420mg/L,水样p H值为7.48,温度23℃条件下,进行了高铁酸钾的投加量对COD去除效果的试验研究。结果表明,高铁酸钾的投加量为50mg/L(以Fe计)时,有机物降解效果较佳;在此基础上,进行了反应时间对COD去除效果的试验研究。结果表明,反应的前20min,COD急剧下降,20min时COD降至55 mg/L;20min之后反应时间对高铁酸钾降解有机物效果影响不大;随后进行了p H值对COD去除效果的试验研究。结果表明,在p H值为3.01条件下,COD含量32mg/L;高铁酸钾对有机物的降解效果较好。(2)利用紫外-可见光分光光度法,考察高铁酸钾对污水中有机物去除特性。对比紫外光谱图与吸光度的数据,发现增大高铁酸钾投加量,吸收峰的强度逐渐减小;但当投加量达到50mg/L后,吸收峰不再降低,说明有机物不再降解;反应时间超过20min之后,反应时间对不同碳源有机物的降解的影响不大;p H对不同碳源有机物降解的影响比较明显。当反应p H值为3.00左右的酸性条件下,吸收峰很低,而随着p H值的增加,相应的有机物吸收峰有升高趋势,说明对应的有机物的含量也在增加。(3)利用荧光分光光度法,考察高铁酸钾对污水中有机物降解特性。根据荧光光谱图与吸光度的数据,并与测得水样中COD值一同分析,实验表明当高铁酸钾投加量增大时,COD含量逐渐减小,而荧光峰值也在变小,对有机物的去除有明显的效果,投加量达到50mg/L后,水样中有机物被降解为小分子有机物,此时高铁酸钾的降解效果已达到最大,仍有部分小分子有机物不能得到全部降解;20min之后反应时间增加,COD含量没有明显降低,荧光峰也没有明显降低,反应时间对不同碳源有机物的去除影响不大;p H对不同碳源有机物去除是有一定影响的,当反应p H值为3.0酸性条件下,COD含量最低,荧光峰最小,此时高铁酸钾对有机物的降解效果较好的。(4)用紫外-可见光分光光度计扫描,发现原水中主要包含了脂类或不饱和羧酸类、醇类、酮类等有机物;用荧光分光光度计扫描,发现原水中主要包含了类色氨酸、类芳香族蛋白质、类富里酸等有机物。因为两种分光光度计的原理不同,对官能团的扫描结果也不一样,因此对分析结果出现的物质有些许不同。(5)本实验水样中,存在的不同碳源有机物,根据荧光光谱分析,大致存在三种有机物,类色氨酸、类芳香族蛋白质、类富里酸。通过试验结果可以得出,高铁酸钾对这三种有机物的降解效果明显。处理后水样中COD仍然在100mg/L以上,表明高铁酸钾对部分有机物无法降解。
[Abstract]:With the rapid development of the city, national attention to the protection of water environment, the rapid development of sewage treatment technology and improve potassium ferrate. As a multifunctional water treatment agent, which does not have two pollution, odorless, oxidation flocculation speed, sterilization and other advantages, in the sewage treatment process plays an important the water station in Shandong Jianzhu University. The raw water as the research object, studied the degradation of organic matter in the sewage of potassium ferrate, the main research contents and conclusions are as follows. (1) in the COD of raw water 420mg/L, water p value of H was 7.48, the temperature of 23 DEG C under the condition of the study on the removal efficiency of COD of potassium ferrate the dosage. The results show that potassium ferrate's dosage is 50mg/L (Fe), organic matter degradation effect is better; on this basis, the reaction time for removal of COD. The results show that, The reaction of the former 20min, COD declined sharply, 20min COD to 55 mg/L; 20min after the effect of reaction time on potassium ferrate degradation of organic compounds with little effect; then studied the removal of COD P H in P. The results showed that the H value is 3.01 under the condition of COD in 32mg/L; good effect on organic potassium ferrate the degradation. (2) by UV Vis spectrophotometry, Potassium Ferrate on removal characteristics of organic pollutants in wastewater. Figure and absorbance comparison of ultraviolet spectral data, it was found that increasing the dosage of potassium ferrate, the absorption peak intensity gradually decreases; but when the dosage is 50mg/L, the absorption peak no longer reduce, no longer show that organic matter degradation; after the reaction time is more than 20min, the reaction time has little influence to the degradation of different carbon sources of organic matter; effects of P H on different carbon sources of organic matter degradation obviously. When the reaction P H value is about 3 of the acid Under the condition, the absorption peak is very low, with the increase of P H value, organic matter absorption peaks corresponding with the rise of the content of organic matter that corresponds to the increase in. (3) by fluorescence spectrophotometry, investigate potassium ferrate degradation characteristics of organic substances in wastewater. According to the Ying Guangguang spectra and absorbance the data, together with the measured value and analysis of COD in water sample, the experimental results show that when potassium ferrate dosage increased, COD content decreased gradually, while the fluorescence peak is smaller, has a significant effect on the removal of organic matter, the dosage is 50mg/L, in the water machine is divided into small molecules the organic matter, at this time potassium ferrate has reached the maximum degradation effect, there are still some small organic molecules can not be degraded completely after 20min; the reaction time increased, the content of COD is not significantly reduced, has not significantly reduced the fluorescence peak, reaction time of different organic carbon sources The removal of P H has little effect on different carbon sources; organic matter removal has certain effect, when the reaction of P H 3 under the acidic condition, the content of COD was the lowest, the minimum fluorescence peak at potassium ferrate, the effect of organic matter degradation better. (4) by UV visible light spectrophotometer scan description, found in raw water contains lipids or unsaturated carboxylic acids, alcohols, ketones and other organic compounds; by fluorescence spectrophotometer scanning, found that the raw water contains tryptophan, aromatic protein, fulvic acid and other organic compounds. Because the two kinds of different principle of spectrophotometer the functional groups, the scan results are not the same, so the material analysis results are slightly different. (5) the experimental samples in different organic carbon sources exist, according to the analysis of fluorescence spectra, there are three kinds of organic compounds, tryptophan, aromatic protein, fulvic acid. Through the test It can be concluded that the degradation effect of Potassium Ferrate on these three organic matters is obvious. After treatment, the COD in water samples is still above 100mg/L, indicating that potassium ferrate can't degrade certain organic matters.

【学位授予单位】：山东建筑大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X703

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