本文選題：羅丹明B　切入點：林可霉素　出處：《華中師范大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：當(dāng)今社會經(jīng)濟發(fā)展迅速,帶來了日益突出的水環(huán)境污染問題。飲用水存在極大的安全隱患,甚至危及到人類的生命安全。因此,各國環(huán)境研究人員致力于水資源的修復(fù)工作,提出各種污水治理方案。在這些技術(shù)手段中,電化學(xué)技術(shù)由于其綠色環(huán)保、成本低廉且無二次污染得到了廣泛關(guān)注。本文中,我們分別采用Fe2O3/ACF體系與Pt/ACF電化學(xué)處理體系,實現(xiàn)了對污染物羅丹明B與林可霉素的有效降解,為污染物治理提供了一個可行的途徑。第一章中,我們首先通過水熱方法合成了不同形貌的Fe2O3納米材料,并利用SEM與TEM研究了Fe2O3納米材料的微觀結(jié)構(gòu)及其暴露晶面。隨后以Fe2O3納米材料為陰極活性材料,研究了電Fenton過程中污染物降解過程與氧化鐵微觀結(jié)構(gòu)之間的關(guān)系。結(jié)果表明,{110}晶面暴露的Fe2O3降解羅丹明B污染物的速率遠(yuǎn)大于{001}晶面暴露的Fe2O3,其主要原因是不同暴露晶面Fe2O3表面產(chǎn)生Fe(Ⅱ)的過程存在明顯區(qū)別。通過電化學(xué)方法,我們研究了Fe2O3不同暴露晶面上與表面Fe(Ⅱ)的產(chǎn)生過程。同時,我們意外發(fā)現(xiàn)Fe2O3的不同暴露晶面也顯著影響了分子氧活化過程。盡管兩種不同晶面Fe2O3表面產(chǎn)生·OH自由基的量比較接近,但產(chǎn)生的O2-自由基的量卻差別較大。經(jīng)過實驗結(jié)果分析,我們認(rèn)為在通電條件下,Fe2O3的{110}暴露晶面不僅能產(chǎn)生·OH,而且有利于O2單電子還原產(chǎn)生O2-；而在{001}面累積的大部分為·OH。體系產(chǎn)生O2的過程區(qū)別是導(dǎo)致不同晶面Fe2O3降解羅丹明B速率不同的主要原因。第二章中,我們首先研究了電流密度、溶液pH以及污染物濃度對Pt/ACF體系降解林可霉素速率的影響。在單池體系中,林可霉素除了能夠在陽極被氧化降解外,林可霉素及其在Pt電極表面氧化的產(chǎn)物也會被吸附在陰極ACF表面。ACF可以增強體系去除林可霉素的效果,實現(xiàn)抗生素的有效去除與富集。同時雙池體系驗證了體系中Pt電極的氧化作用與ACF的吸附作用對林可霉素的去除是協(xié)同作用而非疊加作用。但是,該體系林可霉素并沒有發(fā)生礦化,只能促進污染物中有機N向無機N轉(zhuǎn)化。在整個過程中,由于不加入其它化學(xué)試劑,避免了化學(xué)試劑帶來的二次污染并且綠色環(huán)保。
[Abstract]:Nowadays, with the rapid development of society and economy, the problem of water environment pollution is becoming more and more prominent. Drinking water has great potential safety problems, even endangering the safety of human life. Therefore, environmental researchers from all over the world devote themselves to the restoration of water resources. In this paper, Fe2O3/ACF system and Pt/ACF electrochemical treatment system are adopted, respectively, in which electrochemical technology is widely concerned because of its green environmental protection, low cost and no secondary pollution. The effective degradation of Rhodamine B and lincomycin provides a feasible way for the treatment of pollutants. In Chapter 1, different morphologies of Fe2O3 nanomaterials were synthesized by hydrothermal method. SEM and TEM were used to study the microstructure and exposed crystal plane of Fe2O3 nanomaterials, and then Fe2O3 nanomaterials were used as cathode active materials. The relationship between the degradation process of pollutants and the microstructure of iron oxide in the process of electric Fenton was studied. The results show that the rate of degradation of Rhodamine B pollutants by Fe2O3 exposed to {110} crystal plane is much higher than that of Fe _ 2O _ 3 exposed to {001} crystal plane. The main reason is that the degradation rate is different. There are obvious differences in the process of Fe (鈪，

本文編號：1602711