本文選題：磁性碳材料 + 亞甲基藍(lán)　； 參考：《蘭州大學(xué)》2015年碩士論文

【摘要】：染料廣泛應(yīng)用于食品、醫(yī)藥、印染等行業(yè),在生產(chǎn)過(guò)程中超過(guò)15%的染料不經(jīng)任何處理直接排放到環(huán)境中,成為水污染的重要來(lái)源。大多數(shù)染料具有毒性,甚至致癌。去除水中有機(jī)染料的方法大致可分為三類(lèi),生物法、化學(xué)法和物理法�；瘜W(xué)處理法中新興的高級(jí)氧化技術(shù),因其具有徹底氧化降解染料、無(wú)二次污染等特點(diǎn)受到了廣泛關(guān)注。其中新型磁性碳材料可以作為一種有效的吸附催化氧化降解染料的催化劑,成為近年研究的熱點(diǎn)。新型磁性碳材料可在惰性氣體的保護(hù)下炭化由碳前體與鐵前體依靠物理混合、離子鍵或者共價(jià)鍵結(jié)合的混合物制備而得。其中碳具有富集污染物的作用,鐵化合物一方面可以活化氧化劑產(chǎn)生強(qiáng)氧化性的自由基,將污染物徹底礦解為二氧化碳和水,另一方面可以利用其磁性,將材料從溶液中快速分離進(jìn)行重復(fù)利用。本論文制備了三種新型的磁性碳復(fù)合材料,詳細(xì)研究了制備條件對(duì)其性能的影響,并探討了其在去除水溶液中亞甲基藍(lán)的性能。1.以花生殼為主要原料制備粉末狀磁性碳及對(duì)亞甲基藍(lán)吸附降解的研究：粉末狀的花生殼磁性碳復(fù)合材料由農(nóng)業(yè)廢棄物花生殼與草酸鐵胺通過(guò)浸泡-干燥-炭化一步法免活化制備而得,將制備的花生殼磁性碳PMC,對(duì)其形貌、磁性能、比表面積、所含成分等方面詳盡的表征。并且構(gòu)筑了非均相類(lèi)Fenton體系K2S2O8/PMC-2,在批式反應(yīng)體系中實(shí)現(xiàn)了對(duì)亞甲基藍(lán)快速高效地氧化降解,PMC表現(xiàn)出低的鐵溶出率,在重復(fù)應(yīng)用七次后,仍然具有很高的催化活性,因其制備方法簡(jiǎn)單,原料廉價(jià)易得使其具有工業(yè)化應(yīng)用前景；2.以氯甲基化的聚苯乙烯微球通過(guò)離子交換法制備磁性碳微球及對(duì)亞甲基藍(lán)降解的研究：以商品化的氯甲基化的聚苯乙烯微球?yàn)樵?表面改性得到PS-EDTA螯合樹(shù)脂,通過(guò)離子交換負(fù)載鐵離子,然后將復(fù)合后的材料炭化得到磁性碳微球MCS-t.對(duì)磁性碳微球MCS-t的形貌、磁性能、比表面積、所含成分等方面詳盡的表征。構(gòu)筑了非均相類(lèi)Fenton體系H2O2+NH2OH/MB,可快速高效去除亞甲基藍(lán),并且重復(fù)使用性能很好。其原料均已商品化,因此在快速降解污染物的工業(yè)化應(yīng)用中有很大的潛力。3.以竹纖維為主要原料經(jīng)改性原位組裝表面負(fù)載Fe-BTC配合物制得磁性碳纖維對(duì)亞甲基藍(lán)快速吸附去除的研究：商業(yè)化的竹纖維,表面通過(guò)堿性條件下氯乙酸改性增加羰基化學(xué)鍵,進(jìn)行原位逐步組裝表面形成Fe-BTC配合物,復(fù)合材料炭化后形成了多層級(jí)孔,對(duì)炭化后的纖維狀磁性碳MBF-t的形貌、磁性能、比表面積、所含成分等方面詳盡的表征。將其應(yīng)用于吸附廢水中的亞甲基藍(lán),可以快速吸附污水中亞甲基藍(lán),乙醇解吸后,可多次重復(fù)吸附亞甲基藍(lán)。在重復(fù)使用六次后,對(duì)亞甲基藍(lán)的去除率仍然達(dá)80%以上。因此,磁性碳纖維MBF-t在對(duì)水中污染物進(jìn)行快速有效吸附去除方面有很大的應(yīng)用前景。
[Abstract]:Dyes are widely used in food, medicine, printing and dyeing industries. More than 15% of dyes are discharged directly into the environment without any treatment in the production process, and become an important source of water pollution. Most dyes are toxic and even carcinogenic. The methods of removing organic dyes in water can be divided into three types: biological method, chemical method and physical method. The new advanced oxidation technology in chemical treatment has attracted wide attention because of its characteristics of thorough oxidation and degradation of dyes without secondary pollution. Among them, new magnetic carbon materials can be used as an effective catalyst for adsorption and catalytic oxidation degradation of dyes, which has become a hot research topic in recent years. A new magnetic carbon material can be carbonized under the protection of inert gas from a mixture of carbon precursor and iron precursor which is prepared by physical mixing ionic bond or covalent bond. Among them, carbon can enrich pollutants, iron compounds can activate oxidants to produce strongly oxidizing free radicals, which can completely mine pollutants into carbon dioxide and water, on the other hand, they can use their magnetic properties. The materials are quickly separated from the solution for reuse. In this paper, three new magnetic carbon composites were prepared. The effects of preparation conditions on their properties were studied in detail, and the performance of methylene blue in aqueous solution was discussed. Preparation of powdered Magnetic carbon from Peanut Shell and degradation of methylene Blue by adsorption and degradation: the powdered Peanut Shell Magnetic carbon Composites were prepared from agricultural waste peanut shell and ferric oxalate by soaking, drying and carbonization. Step method without activation preparation, The morphology, magnetic properties, specific surface area and composition of magnetic carbon PMCs prepared from peanut shell were characterized in detail. The heterogeneous Fenton system K _ 2S _ 2O _ 8 / PMC-2 was constructed. The rapid and efficient oxidation and degradation of methylene blue showed low iron dissolution rate in batch reaction system. After repeated application for seven times, it still had high catalytic activity. Because of its simple preparation method and cheap raw materials, it has a prospect of industrial application. Preparation of magnetic carbon microspheres from chloromethylated polystyrene microspheres by ion exchange and degradation of methylene blue: PS-EDTA chelating resin was prepared by surface modification of commercial chloromethylated polystyrene microspheres. The magnetic carbon microspheres MCS-t were prepared by carbonization of the composite materials by ion exchange supported iron ions. The morphology, magnetic properties, specific surface area and composition of magnetic carbon microspheres were characterized in detail. A heterogeneous Fenton system, H2O2 NH2OH / MBB, was constructed to remove methylene blue quickly and efficiently, and the reuse performance was very good. Its raw materials have been commercialized, so it has great potential in the industrial application of rapid degradation of pollutants. Study on the Rapid adsorption and removal of methylene Blue by Magnetic carbon Fibers prepared from Bamboo Fibers as main Raw material by In-situ Assembly of Surface loaded Fe-BTC complexes: commercial bamboo fibers were modified with chloroacetic acid to increase the carbonyl chemical bond on the surface of commercial bamboo fibers. In situ, the surface of Fe-BTC complex was formed, and the multilayer pores were formed after carbonization. The morphology, magnetic properties, specific surface area and composition of charred fibrous magnetic carbon (MBF-t) were characterized in detail. The methylene blue can be quickly adsorbed by methylene blue in wastewater. After desorption with ethanol, methylene blue can be adsorbed repeatedly for many times. After repeated use for six times, the removal rate of methylene blue was still over 80%. Therefore, magnetic carbon fiber (MBF-t) has great application prospect in fast and effective adsorption and removal of pollutants in water.
【學(xué)位授予單位】：蘭州大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TB33;X703

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本文編號(hào)：1821087