本文選題：氧化石墨烯 + 靜電紡絲　； 參考：《山東大學(xué)》2017年碩士論文

【摘要】：亞甲基藍(lán)(MethyleneBlue,MB)是一種普遍使用的工業(yè)有機(jī)染料,廣泛應(yīng)用于印染、紡織等領(lǐng)域。亞甲基藍(lán)具有復(fù)雜的分子結(jié)構(gòu),且?guī)в斜江h(huán),因此難以降解并具有一定的低毒性。重金屬鎘(Cd)主要來源是采礦、冶煉等行業(yè),主要應(yīng)用于電鍍、核工業(yè)和電子等領(lǐng)域。廢水中鎘離子可以通過食物鏈進(jìn)入生物體內(nèi),積存于各器官內(nèi)造成慢性損害,對(duì)腎臟損害最為明顯,嚴(yán)重鎘污染可能會(huì)導(dǎo)致骨頭軟化。因此,含有MB和金屬鎘的水體在排放到自然環(huán)境之前必須進(jìn)行有效的處理。吸附法由于成本低、效率高、易操作等特點(diǎn)被證明是一種廢水處理中非常有效的方法。碳納米材料的出現(xiàn),為水處理行業(yè)帶來了新的契機(jī),作為石墨烯的氧化衍生物,氧化石墨烯(GO)具有大的比表面積和豐富的含氧官能團(tuán),這些性質(zhì)使得氧化石墨烯可以成為一種吸附性能良好的吸附劑,但由于GO易發(fā)生團(tuán)聚,在吸附結(jié)束后不易回收,容易造成二次污染,所以將GO與其他材料結(jié)合,制備得到氧化石墨烯基復(fù)合材料,發(fā)揮GO優(yōu)異吸附性能的同時(shí),避免造成二次污染問題。本研究使用靜電紡絲工藝將聚丙烯腈(PAN)和氧化石墨烯復(fù)合,制備得到聚丙烯腈/氧化石墨烯(PAN/GO)復(fù)合纖維薄膜,通過FESEM、HRTEM、XRD、FTIR和TGA等測試分析方法表征了 GO和PAN/GO的形貌結(jié)構(gòu)及熱穩(wěn)定性,研究了PAN/GO復(fù)合纖維薄膜吸附MB和Cd2+的能力和原理。選取GO與PAN質(zhì)量比為30%的復(fù)合纖維薄膜,PAN/GO復(fù)合纖維對(duì)MB的飽和吸附容量為132.35 mg/g,GO質(zhì)量比、溶液pH值、接觸時(shí)間、MB濃度以及反應(yīng)溫度都會(huì)對(duì)吸附容量產(chǎn)生一定影響;借助吸附等溫線分析得出PAN/GO復(fù)合纖維對(duì)MB的吸附更符合Langmuir等溫線模型;吸附動(dòng)力學(xué)研究發(fā)現(xiàn),PAN/GO復(fù)合纖維吸附MB的過程與Pseudo-second-order模型更接近;熱力學(xué)分析得到的參數(shù)表明,PAN/GO復(fù)合纖維吸附MB的過程是自發(fā)進(jìn)行的,并且是吸熱過程。PAN/GO復(fù)合纖維薄膜吸附Cd2+的飽和容量為87.98 mg/g;PAN/GO復(fù)合纖維吸附Cd2+的過程更加符合Freundlich 模型。
[Abstract]:Methylene blue (MB) is a widely used industrial organic dye, widely used in printing and dyeing, textile and other fields. Methylene blue has complex molecular structure and benzene ring, so it is difficult to degrade and has low toxicity. Heavy metal cadmium (CD) mainly comes from mining, smelting and other industries, mainly used in electroplating, nuclear industry and electronics. The cadmium ions in the wastewater can enter the organism through the food chain and accumulate in various organs to cause chronic damage. The kidney damage is the most obvious. Serious cadmium pollution may lead to bone softening. Therefore, water containing MB and cadmium must be treated effectively before it is released into the natural environment. Adsorption process has been proved to be a very effective method in wastewater treatment because of its low cost, high efficiency and easy operation. The appearance of carbon nanomaterials brings a new opportunity for the water treatment industry. As an oxidation derivative of graphene, graphene oxide (go) has a large specific surface area and abundant oxygen functional groups. These properties make graphene oxide a good adsorbent, but because go is easy to reunite, it is difficult to recover after adsorption, and it is easy to cause secondary pollution, so go is combined with other materials. Graphene oxide composites were prepared to give full play to the excellent adsorption properties of go and to avoid the problem of secondary pollution. In this study, polyacrylonitrile (pan) / graphene oxide (PAN / go) composite fiber film was prepared by electrospinning process. The morphology, structure and thermal stability of go and pan / go were characterized by Fesemer HRTEMN FTIR and TGA. The ability and principle of adsorption of MB and CD2 on PAN / go composite fiber films were studied. When the mass ratio of go to pan is 30%, the saturated adsorption capacity of PAN / go composite fiber to MB is 132.35 mg / g go, the pH value of solution, the concentration of MB in contact time and the reaction temperature will affect the adsorption capacity to some extent. The adsorption of MB by PAN / go composite fiber is more consistent with Langmuir isotherm model, and the adsorption kinetics of PAN / go composite fiber is closer to that of Pseudo-second-order model, and the adsorption kinetics of PAN / go composite fiber is more similar to that of Pseudo-second-order model, and the adsorption kinetics of PAN / go composite fiber is similar to that of Pseudo-secondary order model. The thermodynamic analysis results show that the adsorption process of MB by PAN / go composite fiber is spontaneous, and the adsorption capacity of CD2 by PAN / go composite fiber film is 87.98 mg / g / go composite fiber adsorbing CD _ 2. The adsorption process of CD _ 2 by PAN / go composite fiber is more consistent with Freundlich model.
【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TB33;X703

【參考文獻(xiàn)】

相關(guān)期刊論文 前6條

1 張偉強(qiáng);馬建國;劉淑娟;武里鵬;謝海輝;溫佳麗;;改性石墨烯海綿材料對(duì)鈾的吸附研究[J];東華理工大學(xué)學(xué)報(bào)(自然科學(xué)版);2014年02期

2 楊鐵春;王攀峰;高豹;王琳;曹小紅;;磁性氧化石墨烯對(duì)水溶液中鈾(Ⅵ)的吸附性能研究[J];江西化工;2013年04期

3 張秀蓉;龔繼來;曾光明;鄧久華;;磁性氧化石墨烯制備及去除水中剛果紅的研究[J];中國環(huán)境科學(xué);2013年08期

4 邱小香;朱海燕;;水體重金屬的污染及其處理方法[J];湖南農(nóng)業(yè)科學(xué);2011年14期

5 楊澤志;奚旦立;毛艷梅;;微濾技術(shù)在紡織印染廢水深度處理中的應(yīng)用[J];印染;2007年14期

6 謝黎虹,許梓榮;重金屬鎘對(duì)動(dòng)物及人類的毒性研究進(jìn)展[J];浙江農(nóng)業(yè)學(xué)報(bào);2003年06期

相關(guān)碩士學(xué)位論文 前1條

1 徐瑤;幾種果殼活性炭的制備及微波催化降解雙酚A的比較研究[D];遼寧大學(xué);2012年

，

本文編號(hào)：2102410