本文選題：臭氧 + 催化氧化��； 參考：《蘭州交通大學(xué)》2015年碩士論文

【摘要】：石油化工行業(yè)在我國經(jīng)濟(jì)發(fā)展中具有舉足輕重的地位,其在保持快速發(fā)展的同時(shí),帶來的環(huán)境問題也不容忽視,尤其是對(duì)水環(huán)境的破壞。隨著國家消減主要污染物排放總量工作的開展以及石化行業(yè)污染物的排放標(biāo)準(zhǔn)的逐步提高,傳統(tǒng)的技術(shù)方法很難滿足越來越嚴(yán)的要求。因此,為了更加合理地利用和節(jié)約水資源,貫徹國家環(huán)境減排政策,探索應(yīng)用方便和經(jīng)濟(jì)有效的新技術(shù)迫在眉睫。由于臭氧催化氧化技術(shù)具有處理效果好、無二次污染等優(yōu)點(diǎn)被廣泛應(yīng)用于給水處理、污水處理等方面,所以,該技術(shù)越來越得到人們的重視,有很好的應(yīng)用前景。因此,在閱讀大量文獻(xiàn)的基礎(chǔ)上,本論文采用臭氧催化氧化技術(shù)對(duì)化工外排水進(jìn)行處理,結(jié)果將為化工外排水在石油化工類企業(yè)中水回用項(xiàng)目的推廣提供參考依據(jù)和技術(shù)支持。首先,用自制催化劑處理苯酚和草酸溶液,研究表明,自制Al2O3-Mn催化劑對(duì)苯酚和草酸兩種模擬的污染物都有一定的吸附作用,其余5種催化劑的吸附能力較差。Al2O3-Mn催化氧化作用對(duì)苯酚的去除率達(dá)到了50%,并且實(shí)驗(yàn)結(jié)果穩(wěn)定,催化劑穩(wěn)定性高。催化劑Al-Cu0530和G-Mn0603催化氧化草酸的效果隨著時(shí)間的延長逐漸降低。Al2O3-Cu催化劑對(duì)草酸的去除率較低,Al2O3-Ti和Al2O3-Mn催化劑對(duì)草酸的去除率分別可達(dá)到60%和52%。因此,綜合考慮,Al2O3-Mn催化劑的實(shí)驗(yàn)效果較好。然后,對(duì)市購的6種催化劑進(jìn)行篩選,發(fā)現(xiàn)HWS-X和PX催化劑對(duì)廢水中COD有很好的去除效果。因此,對(duì)HWS-X和PX催化劑在廢水處理中的最佳工藝參數(shù)進(jìn)行了優(yōu)化。發(fā)現(xiàn)HWS-X催化劑在臭氧一次加入,濃度為35 mg/L,投加時(shí)間為15 min,停留時(shí)間為30 min,保持原水pH值,催化劑填裝量為600 mL的條件下實(shí)驗(yàn)效果最佳。PX催化劑的最優(yōu)實(shí)驗(yàn)條件為:臭氧一次加入,濃度為35 mg/L,投加時(shí)間為20 min,停留時(shí)間為30 min,原水pH值,催化劑填裝量為500 mL。在最優(yōu)實(shí)驗(yàn)條件下,HWS-X催化劑和PX催化劑對(duì)COD的降低值分別約為62.0和30.7 mg/L。隨著實(shí)驗(yàn)次數(shù)的增加,HWS-X催化劑的催化氧化效果先升高后保持穩(wěn)定,而PX催化劑則不斷降低。吸附飽和的HWS-X催化劑經(jīng)過三次催化氧化實(shí)驗(yàn)后,其效果和新催化劑的效果接近,其吸附作用對(duì)COD的降低值也達(dá)到了54.3 mg/L。最后,單獨(dú)臭氧氧化對(duì)化工外排水中COD的去除率隨著反應(yīng)時(shí)間的延長呈逐漸增加的趨勢(shì)。當(dāng)反應(yīng)時(shí)間為30 min時(shí),單獨(dú)臭氧氧化對(duì)COD的去除率僅為7.54%。當(dāng)用催化劑處理化工外排水時(shí),Al2O3-Mn催化劑對(duì)有機(jī)物的去除率較低。反應(yīng)時(shí)間為10 min時(shí),HWS-X催化劑反應(yīng)體系中COD和TOC值突然升高,和原水相比,出水的COD值增加了11.53%。然后,出水中COD和TOC值隨著反應(yīng)時(shí)間的延長逐漸下降。所有出水的UV254值和pH值保持不變。當(dāng)采用大量的HWS-X催化劑處理化工外排水時(shí)其出水的COD均能滿足國家新的排放標(biāo)準(zhǔn)。由此可見,HWS-X催化劑和臭氧聯(lián)用具有很好的催化氧化效果。并且發(fā)現(xiàn),自制Al2O3-Mn催化劑在處理化工外排水時(shí)和市購的PX催化劑能力相當(dāng)。
[Abstract]:The petrochemical industry plays an important role in the economic development of our country. While maintaining the rapid development, the environmental problems can not be ignored, especially the damage to the water environment. With the development of the total emission of the main pollutant discharge and the gradual improvement of the emission standards of the petrochemical industry, the traditional It is difficult to meet the demands of more and more strict technology. Therefore, in order to use and save water resources more rationally, implement the national environmental emission reduction policy, explore the new technology which is convenient and economical and effective. As the ozone catalytic oxidation technology has the advantages of good treatment and no two pollution, it is widely used in water treatment and pollution. Therefore, the technology has been paid more and more attention and has a good application prospect. Therefore, on the basis of reading a lot of literature, this paper uses the ozone catalytic oxidation technology to treat the chemical external drainage. The result will provide reference for the promotion of the water reuse project in the petrochemical industry. And technical support. First, using the self-made catalyst to treat phenol and oxalic acid solution, the study shows that the self-made Al2O3-Mn catalyst has a certain adsorption effect on two simulated pollutants of phenol and oxalic acid, the other 5 kinds of catalysts have poor adsorption capacity, and the removal rate of phenol by.Al2O3-Mn catalytic oxidation is 50%, and the experimental results are stable. As the catalyst Al-Cu0530 and G-Mn0603 catalyze the oxidation of oxalic acid with time, the removal rate of oxalic acid by.Al2O3-Cu catalyst is lower and the removal rate of oxalic acid by Al2O3-Ti and Al2O3-Mn catalysts can reach 60% and 52%., respectively. The effect of Al2O3-Mn catalyst is better than that of Al2O3-Mn catalyst. After screening 6 kinds of catalyst purchased in the city, it was found that HWS-X and PX catalyst had good removal effect on COD in wastewater. Therefore, the optimum process parameters of HWS-X and PX catalyst in wastewater treatment were optimized. It was found that the HWS-X catalyst was added to the ozone once, the concentration was 35 mg /L, the time was 15 min, and the residence time was 30 min, and the retention time was 30 min. With the pH value of the original water and the catalyst filling amount of 600 mL, the optimum experimental conditions for the optimum.PX catalyst are: ozone once added, the concentration is 35 mg/L, the time is 20 min, the residence time is 30 min, the pH value of the original water, the filling amount of the catalyst are 500 mL. in the optimal test condition, and the HWS-X and PX catalysts are reduced to COD. The results are about 62 and 30.7 mg/L., respectively, with the increase of the number of experiments, the catalytic oxidation effect of the HWS-X catalyst increases first and the PX catalyst decreases. After three catalytic oxidation experiments, the effect of the adsorbed HWS-X catalyst is close to the effect of the new catalyst, and the decrease of the adsorption effect on COD is also 5. 4.3 mg/L. finally, the removal rate of COD in chemical external drainage is gradually increasing with the prolongation of the reaction time. When the reaction time is 30 min, the removal rate of COD by the single ozone oxidation is only 7.54%. when the catalyst is used to treat the chemical drainage with the catalyst, the removal rate of the organic matter is lower than that of the Al2O3-Mn. At 10 min, the value of COD and TOC increased suddenly in the reaction system of HWS-X catalyst. Compared with the original water, the COD value of the effluent was increased by 11.53%., and the value of COD and TOC in the effluent decreased gradually with the prolongation of the reaction time. The UV254 value and pH value of all the effluent remained unchanged. It can be seen that the HWS-X catalyst and the combined use of ozone have a good catalytic oxidation effect. It is found that the self-made Al2O3-Mn catalyst has the same capacity as the PX catalyst purchased by the city in the treatment of chemical drainage.

【學(xué)位授予單位】：蘭州交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：X78

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 梁濤;馬軍;王勝軍;楊憶新;張靜;;O_3/TiO_2催化氧化工藝對(duì)飲用水中AOC的影響[J];環(huán)境科學(xué);2007年09期

，

本文編號(hào)：1808156