本文選題：對(duì)苯二酚　切入點(diǎn)：微電解　出處：《吉林大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：對(duì)苯二酚是重要的化工原料，該產(chǎn)品用途廣泛，是農(nóng)藥、醫(yī)藥和染料的重要中間體，用于制造蒽醌、偶氮染料及感光材料，，同時(shí)，對(duì)苯二酚被廣泛用作抗氧化劑，用于橡膠及食品防腐。因此，對(duì)苯二酚大量存在于各種工業(yè)廢水中，如染料廢水、橡膠工業(yè)廢水及制藥廢水。由于對(duì)苯二酚對(duì)水生生物具有潛在毒性，因此含對(duì)苯二酚廢水的大量排放會(huì)對(duì)生態(tài)環(huán)境及人類健康構(gòu)成嚴(yán)重威脅，對(duì)苯二酚廢水的處理勢(shì)在必行。 本研究采用微電解法處理對(duì)苯二酚廢水，以傳統(tǒng)鐵-碳微電解填料為基礎(chǔ)，加入錳、鋅、銅粉對(duì)其進(jìn)行改性，制備規(guī)整化的改性鐵-錳-碳填料、鐵-鋅-碳填料及鐵-銅-碳填料，并探究了三種改性填料對(duì)對(duì)苯二酚的去除效果，考察了改性填料的種類、填料投加量、反應(yīng)時(shí)間、改性填料中添加劑的含量、廢水初始pH等因素對(duì)對(duì)苯二酚去除率的影響。研究中測(cè)定了整個(gè)反應(yīng)過程的溶液pH變化情況，對(duì)填料改性前后進(jìn)行了SEM、XRD表征分析，同時(shí)采用GC-MS對(duì)對(duì)苯二酚的降解中間產(chǎn)物進(jìn)行分析，從而推斷改性微電解法降解對(duì)苯二酚的途徑。 研究結(jié)果表明，與傳統(tǒng)鐵-碳微電解填料相比，本研究制備的三種改性填料（鐵-錳-碳填料、鐵-鋅-碳填料及鐵-銅-碳填料）中，鐵-錳-碳改性填料對(duì)對(duì)苯二酚的處理效果最好。當(dāng)對(duì)苯二酚初始濃度為1000.00mg·L-1時(shí)，鐵-錳-碳改性填料處理對(duì)苯二酚廢水的最佳工藝條件為：填料投加量為29.17g·L-1，反應(yīng)時(shí)間為4.0h，改性填料中錳粉的質(zhì)量分?jǐn)?shù)為9%，廢水初始pH為3.00，在此條件下，廢水中對(duì)苯二酚的去除率可達(dá)95.55%。與鐵-碳填料相比，鐵-錳-碳改性微電解填料能夠大幅度提高對(duì)苯二酚的處理效果，去除率可提高42.89%，反應(yīng)過程中溶液的pH大體呈現(xiàn)出先升高后降低的趨勢(shì)，可在反應(yīng)30min內(nèi)上升到8.50以后又逐漸恢復(fù)到中性。采用鐵-錳-碳填料處理對(duì)苯二酚模擬廢水時(shí)，填料對(duì)廢水初始pH的適用范圍比鐵-碳填料寬。 研究中通過對(duì)填料的SEM和XRD表征分析及對(duì)對(duì)苯二酚降解中間產(chǎn)物的分析，推斷出對(duì)苯二酚首先被氧化為對(duì)苯醌，然后逐漸被降解為馬來酸、丙二酸和乙酸。在鐵-碳填料中加入錳粉后，錳較低的電極電位更有利于電極反應(yīng)的進(jìn)行，從而提高了對(duì)苯二酚的去除效果，除此之外，填料中的錳氧化形成的MnO2和Mn3O4具有很高的氧化能力和反應(yīng)活性，可以使對(duì)苯二酚氧化分解。
[Abstract]:Hydroquinone, an important chemical raw material, is widely used as an intermediate of pesticides, pharmaceuticals and dyes. It is used in the manufacture of anthraquinone, azo dyes and photosensitive materials. At the same time, hydroquinone is widely used as an antioxidant. It is used in rubber and food anticorrosion. Therefore, hydroquinone is abundant in various industrial wastewater, such as dye wastewater, rubber industry wastewater and pharmaceutical wastewater. Therefore, a large amount of hydroquinone wastewater discharge will pose a serious threat to the ecological environment and human health, the treatment of hydroquinone wastewater is imperative. In this study, hydroquinone wastewater was treated by micro-electrolysis. Based on the traditional iron-carbon micro-electrolytic filler, manganese, zinc and copper powder were added to modify the hydroquinone wastewater, and a regular iron-manganese-carbon filler was prepared. The effects of three kinds of modified fillers on the removal of hydroquinone were studied. The kinds of modified fillers, the dosage of fillers, the reaction time and the content of additives in the modified fillers were investigated. The influence of the initial pH of wastewater on the removal rate of hydroquinone was studied. The pH change of the solution during the whole reaction process was determined, and the SEM XRD analysis was carried out before and after the modification of the filler. At the same time, the degradation intermediate product of hydroquinone was analyzed by GC-MS, and the way of degradation of hydroquinone by modified microelectrolysis was deduced. The results show that compared with the traditional iron-carbon micro-electrolytic fillers, the three kinds of modified fillers (iron-manganese-carbon, iron-zinc-carbon and iron-copper-carbon) were prepared in this study. When the initial concentration of hydroquinone was 100mg 路L ~ (-1), the effect of Fe _ (2 +) mn ~ (2 +) -carbon modified filler was the best. The optimum technological conditions for the treatment of hydroquinone wastewater with iron-manganese-carbon modified filler are as follows: the dosage of filler is 29.17 g 路L -1, the reaction time is 4.0 h, the mass fraction of manganese powder in the modified filler is 9%, and the initial pH of wastewater is 3.00. The removal rate of hydroquinone in wastewater can reach 95.550.Compared with the iron-carbon filler, the iron-manganese-carbon modified micro-electrolytic filler can greatly improve the treatment effect of hydroquinone. The removal rate could be increased by 42.89, and the pH of the solution increased first and then decreased, and then gradually returned to neutral after 30 min reaction. When the hydroquinone simulated wastewater was treated with iron, manganese and carbon fillers, The suitable range of the initial pH of the wastewater is wider than that of the iron-carbon filler. Through the analysis of SEM and XRD characterization of fillers and the analysis of intermediate products of p-hydroquinone degradation, it was inferred that hydroquinone was first oxidized to p-benzoquinone and then degraded to maleic acid. Malonic acid and acetic acid. When manganese powder is added to iron-carbon filler, the lower electrode potential of manganese is more favorable to the electrode reaction, which improves the removal efficiency of hydroquinone. MnO2 and Mn3O4 formed by manganese oxidation in fillers have high oxidation ability and reaction activity, which can decompose hydroquinone by oxidation.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：X703

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