【摘要】：微波誘導(dǎo)催化氧化技術(shù)處理難降解的有機(jī)廢水具有反應(yīng)快速、降解程度高、不產(chǎn)生二次污染物等優(yōu)點(diǎn)。本文圍繞微波誘導(dǎo)催化氧化這一關(guān)鍵技術(shù),分別采用活性炭、Fe-、Fe2O3/AC和Fe2O3/GC作為催化劑,對甲基橙模擬廢水進(jìn)行處理,研究各主要工藝參數(shù)對染料廢水降解效率的影響,并對微波協(xié)同催化劑處理廢水的機(jī)理進(jìn)行了探究。對微波誘導(dǎo)催化氧化降解甲基橙的影響因素進(jìn)行研究。結(jié)果表明,甲基橙的降解率隨微波功率增大、微波輻照時(shí)間增加和催化劑的用量增加而增大；酸性條件下有利于甲基橙的降解。針對微波-活性炭體系,紫外可見光譜(UV-vis),紅外光譜(IR),掃描電鏡(SEM)分析降解過程。結(jié)果表明,吸附降解反應(yīng)后,大量的中間產(chǎn)物殘留在活性炭表面,使其重復(fù)使用的性能能降低。進(jìn)行微波輻照再生活性炭,結(jié)果表明,微波輻照能有效的再生活性炭,6個(gè)反應(yīng)周期后活性仍可達(dá)原活性的74.1%。針對微波-Fe-B體系,考察了不同處理方法對甲基橙降解性能的影響。結(jié)果表明,在微波誘導(dǎo)作用下,Fe-B催化劑對甲基橙的降解效果顯著。使用X射線衍射(XRD)和SEM,對催化劑進(jìn)行了表征。結(jié)果表明,Fe-B催化劑在經(jīng)過降解反應(yīng)后,Fe-B轉(zhuǎn)化為γ-Fe2O3。UV-vis和IR分析表明,Fe-B催化劑對甲基橙有吸附和降解的雙重功效。針對微波-碳載鐵體系,XRD、SEM和X射線能譜(EDS)分析表明,非晶態(tài)球形氧化鐵顆粒團(tuán)聚負(fù)載于活性炭表面；球形α-Fe2O3顆粒負(fù)載于石墨碳表面。考察了不同處理方法對甲基橙降解性能的影響。結(jié)果表明,在微波誘導(dǎo)作用下,類Fenton法對甲基橙的降解效果顯著。UV-vis和IR分析表明,催化劑對甲基橙有吸附和降解的雙重功效；微波能直接促使H2O2產(chǎn)生·OH降解甲基橙；微波的熱效應(yīng)促進(jìn)了整個(gè)體系的反應(yīng)進(jìn)行。
[Abstract]:Microwave induced catalytic oxidation has the advantages of rapid reaction, high degree of degradation and no secondary pollutants. Around the key technology of microwave induced catalytic oxidation, activated carbon, Fe-,Fe2O3/AC and Fe2O3/GC were used as catalysts to treat methyl orange simulated wastewater, and the effects of main process parameters on the degradation efficiency of dye wastewater were studied. The mechanism of microwave synergistic catalyst for wastewater treatment was also discussed. The factors affecting the degradation of methyl orange by microwave induced catalytic oxidation were studied. The results show that the degradation rate of methyl orange increases with the increase of microwave power, microwave irradiation time and the amount of catalyst, and is favorable to the degradation of methyl orange under acidic conditions. The degradation process was analyzed by UV-vis (UV-vis) and infrared (IR) (IR), scanning electron microscope (SEM) for microwave-activated carbon system. The results showed that after adsorption and degradation, a large number of intermediate products remained on the surface of activated carbon, which reduced its reusing performance. The activated carbon was regenerated by microwave irradiation. The results showed that microwave irradiation could effectively regenerate activated carbon, and the activity of activated carbon could still reach 74.1% of the original activity after six reaction cycles. The effects of different treatment methods on the degradation of methyl orange were investigated for microwave-Fe-B system. The results showed that the degradation of methyl orange by Fe-B catalyst was remarkable under microwave induction. The catalyst was characterized by X-ray diffraction (XRD) and SEM,. The results showed that after the degradation of Fe-B catalyst, Fe-B was transformed into 緯-Fe2O3.UV-vis and IR. The results showed that Fe-B catalyst had the dual function of adsorption and degradation of methyl orange. For microwave-carbon-supported iron system, XRD,SEM and X-ray (EDS) analysis show that amorphous spherical iron oxide particles are agglomerated on the surface of activated carbon, and spherical 偽-Fe2O3 particles are loaded on graphite carbon surface. The effects of different treatment methods on the degradation of methyl orange were investigated. The results showed that the degradation of methyl orange by Fenton method was remarkable under microwave induction. The results of UV-vis and IR analysis showed that the catalyst could adsorb and degrade methyl orange, microwave could directly induce H2O2 to produce OH to degrade methyl orange. The thermal effect of microwave accelerates the reaction of the whole system.
【學(xué)位授予單位】：青島科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：O643.32;X703

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本文編號：2262820