發(fā)布時(shí)間：2018-05-31 18:41

  本文選題：鈦基金屬氧化物陽(yáng)極 + 有機(jī)物廢水��； 參考：《上海師范大學(xué)》2017年碩士論文

【摘要】：21世紀(jì)全球經(jīng)濟(jì)飛速發(fā)展,作為稀缺戰(zhàn)略和生存資源之一的水資源,其污染問(wèn)題已經(jīng)成為各國(guó)亟待解決的重大問(wèn)題之一,伴隨著人類生活和發(fā)展的過(guò)程,水資源的污染態(tài)勢(shì)每況愈下。由于地球淡水資源緊缺,可供人類使用的水源少之又少,各個(gè)行業(yè)如鋼鐵,石油,印染,紡織等等的生產(chǎn)都會(huì)伴隨著水資源的使用和廢水排放,從各行業(yè)廢水排放國(guó)家標(biāo)準(zhǔn)來(lái)看,廢水本身具有的復(fù)雜成分和含量波動(dòng)為水處理工藝帶來(lái)了極大的挑戰(zhàn),諸多水處理的新工藝新方法也應(yīng)運(yùn)而生。目前,DSA陽(yáng)極電化學(xué)氧化法受到較多的關(guān)注。但是,由于DSA陽(yáng)極的穩(wěn)定性和電催化氧化性能的限制,從而使得其在使用過(guò)程中出現(xiàn)了壽命短,催化活性不高,效率偏低等問(wèn)題。因此,找到一種催化性能好的長(zhǎng)壽命電極是我們的研究目的。本論文分別采用了錳和鈰的氧化物對(duì)錫銻陽(yáng)極進(jìn)行改性,并通過(guò)各類測(cè)試方法探究了其實(shí)際使用性能。主要結(jié)果如下:(1)采用MnO_2摻雜于錫銻氧化物的鍍層中,利用錳的摻雜影響錫的結(jié)晶成型。采用SEM,XRD等測(cè)試方法對(duì)電極的物理性質(zhì)進(jìn)行了表征,結(jié)果表明,改性后電極表面鍍層均勻覆蓋,錫和錳的氧化物的形成以及緊密結(jié)合大大提高了電極的抗腐蝕能力。同時(shí)在電性能上,制備電極的析氧電位達(dá)到2.3V,加速測(cè)試條件下的電極壽命達(dá)到約41 h。在采用該制備電極對(duì)含苯酚廢水進(jìn)行實(shí)際降解時(shí),COD去除率在6 h時(shí)能達(dá)到80%以上,表明電極的使用效果得到了很大的提高。(2)利用鈰的氧化物摻雜改善電極的多孔結(jié)構(gòu),提高電極的有效活性面積及催化活性,采用SEM,XRD等測(cè)試方法對(duì)電極物理性質(zhì)進(jìn)行表征,結(jié)果表明,本電極與錳摻雜電極的表面相比發(fā)生較大改變,出現(xiàn)晶粒細(xì)化現(xiàn)象,無(wú)明顯裂隙,鍍層結(jié)合度較好。電性能測(cè)試結(jié)果表明,析氧電位達(dá)2.48V;加速測(cè)試條件下壽命達(dá)39h;實(shí)際降解時(shí),COD去除率在2h可達(dá)50%,電極的電性能大幅提高。(3)電極應(yīng)用于實(shí)際降解過(guò)程時(shí),羥基自由基掩蔽實(shí)驗(yàn)證明了電極的催化氧化過(guò)程遵循自由基的氧化機(jī)理,各種影響因素的確定使電極工作得到了最佳運(yùn)行條件。將電極放大后電極的效果得到了證實(shí),自制電極可以有效對(duì)有機(jī)物進(jìn)行降解。
[Abstract]:With the rapid development of the global economy in the 21st century, as one of the scarce strategies and living resources, the pollution of water resources has become one of the most important problems to be solved by all countries, along with the process of human life and development. The pollution of water resources is getting worse and worse. Due to the shortage of fresh water resources on the earth, there are very few water sources available for human use. The production of various industries such as steel, oil, printing and dyeing, textiles and so on will be accompanied by the use of water resources and the discharge of waste water. According to the national standards of wastewater discharge in various industries, the fluctuation of complex components and contents of wastewater itself brings great challenges to the water treatment process, and many new processes and new methods of water treatment have emerged as the times require. At present, DSA anodic electrochemical oxidation method has received more attention. However, due to the limitation of the stability of DSA anode and the performance of electrocatalytic oxidation, some problems such as short life, low catalytic activity and low efficiency appear in the process of application. Therefore, it is our aim to find a long-life electrode with good catalytic performance. In this paper, tin antimony anode was modified by manganese and cerium oxides, and its practical performance was investigated by various testing methods. The main results are as follows: (1) MnO_2 was used to doped tin antimony oxide coating, and manganese doping was used to influence the crystallization of tin. The physical properties of the electrode were characterized by means of SEM XRD and other methods. The results showed that the corrosion resistance of the electrode was greatly improved by the uniform coating, the formation of tin and manganese oxides and the close combination of tin and manganese. At the same time, the oxygen evolution potential of the prepared electrode is 2.3 V, and the electrode lifetime is about 41 h under the accelerated test condition. The removal rate of COD can reach more than 80% at 6 h when the prepared electrode is used to degrade the wastewater containing phenol, which indicates that the effect of the electrode is greatly improved. 2) the porous structure of the electrode is improved by doping cerium oxide. The effective active area and catalytic activity of the electrode were improved, and the physical properties of the electrode were characterized by means of SEM XRD and other methods. The results showed that the surface of the electrode changed greatly compared with the manganese doped electrode, and the grain size was refined. No obvious cracks, the coating bonding is better. The results of electrical property test show that the oxygen evolution potential is 2.48 V, the life span is 39 h under accelerated test condition, the removal rate of COD can reach 50% in 2 h, and the electric property of the electrode is greatly improved when the electrode is used in the actual degradation process. The hydroxyl radical masking experiment proved that the catalytic oxidation of the electrode followed the oxidation mechanism of free radical, and the determination of various influencing factors made the electrode work under the best operating conditions. The effect of electrode amplification has been confirmed, and self-made electrode can effectively degrade organic matter.
【學(xué)位授予單位】：上海師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：O646;X703

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 江曙光;;中國(guó)水污染現(xiàn)狀及防治對(duì)策[J];水產(chǎn)科技情報(bào);2010年04期

2 奚旦立;馬春燕;;印染廢水的分類、組成及性質(zhì)[J];印染;2010年14期

3 張利平;夏軍;胡志芳;;中國(guó)水資源狀況與水資源安全問(wèn)題分析[J];長(zhǎng)江流域資源與環(huán)境;2009年02期

4 雷川華;吳運(yùn)卿;;我國(guó)水資源現(xiàn)狀、問(wèn)題與對(duì)策研究[J];節(jié)水灌溉;2007年04期

5 吳勇民;李甫;黃咸雨;胡和兵;;含酚廢水處理新技術(shù)及其發(fā)展前景[J];環(huán)境科學(xué)與管理;2007年03期

6 韓建勛,賀愛(ài)國(guó);含氟廢水處理方法[J];有機(jī)氟工業(yè);2004年03期

7 關(guān)亮炯;我國(guó)水污染現(xiàn)狀及治理對(duì)策[J];科技情報(bào)開(kāi)發(fā)與經(jīng)濟(jì);2004年06期

8 申哲民,雷陽(yáng)明,賈金平,陳玉勝,王文華;PbO_2電極氧化有機(jī)廢水的研究[J];高校化學(xué)工程學(xué)報(bào);2004年01期

9 李春輝 ,董永春;紡織廢水處理回用技術(shù)的研究進(jìn)展[J];紡織導(dǎo)報(bào);2003年06期

10 邢平偉 ,秦天 ,宋清生;中國(guó)的水污染現(xiàn)狀及防治對(duì)策淺論[J];太原科技;2003年04期

，

本文編號(hào)：1960887