本文關(guān)鍵詞： 碳納米管 四氧化三鐵 微波 降解 有機污染物　出處：《遼寧大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

【摘要】：本論文制備了四氧化三鐵負載碳納米管(Fe_3O_4/CNTs),并結(jié)合微波技術(shù)(MW)對水中甲基對硫磷(MP)、敵草隆(Diuron)、偶氮品紅(Azo-fuchsine)等有機污染物進行催化降解研究。第一章中,采用微波水熱法制備四氧化三鐵負載碳納米管(Fe_3O_4/CNTs),其中碳納米管(CNTs)選用40-60 nm,將其結(jié)合微波降解污染物,并比較Fe_3O_4/CNTs和CNTs的活性。結(jié)果顯示,水溶液中有機污染物,如甲基橙(MO)、雙酚A(BPA)、甲基對硫磷(MP)、羅丹明B(RhB)和偶氮品紅(Azo-fuchsine),在四氧化三鐵負載碳納米管結(jié)合微波(Fe_3O_4/CNTs/MW)體系中,能夠被快速有效地降解。當(dāng)微波水熱(M-H)壓力為1.0 Mpa,反應(yīng)30 min時,鐵離子濃度為004 mol/L的Fe_3O_4/CNTs活性最高。將微波水熱合成壓力改變到1.5Mpa,微波水熱合成時間和鐵離子濃度(Fe3+)保持不變,初始濃度為38μmol/L (即10mg/L)的甲基對硫磷(MP)溶液,催化劑投加量為1.2g/L,微波功率450 W,2450 MHz,溶液pH=6.2,MW照射15 min時,MP被完全去除。此外,甲基橙(MO)、雙酚A (BPA)、甲基對硫磷(MP)、羅丹明B (RhB)和偶氮品紅(Azo-fuchsine)水溶液,在Fe_3O_4/CNTs/MW體系中被降解,降解動力學(xué)速率常數(shù)K分別為0.925、0.845、0.753、0.993和0.943。因此,在相同合成和降解實驗條件下,Fe_3O_4/CNTs的微波催化活性高于單純CNTs。第二章中,采用微波水熱法、水熱法和共沉淀法三種方法制備四氧化三鐵負載碳納米管(Fe_3O_4/CNTs),并比較其活性。實驗選用的碳納米管粒徑為20-40nm。結(jié)果顯示水溶液中的有機污染物,如雙酚A(BPA)、偶氮品紅(Azo-fuchsine)、敵草隆(Diuron)、甲基對硫磷(MP)、甲基橙(MO)和羅丹明B(RhB),在Fe_3O_4/CNTs/MW體系中,能夠被快速有效地去除。微波水熱法、水熱法和共沉淀法三種方法制備Fe_3O_4/CNTs的Fe3+濃度都為002 mol/L,將制備得到的三種Fe_3O_4/CNTs催化劑分別取0.4g/L,分別與25mL, 10mg/L敵草隆(Diuron)反應(yīng),時間選取1.0分鐘,功率選取450 W,降解率分別為43.91%、47.10%和60.37%。因此,Fe_3O_4/CNTs的微波催化活性順序如下：共沉淀法水熱合成法微波水熱法。綜上所述,四氧化三鐵／碳納米管和碳納米管有MW催化活性,四氧化三鐵／碳納米管結(jié)合微波可以快速有效地降解廢水中有機污染物。微波作用下四氧化三鐵/碳納米管降解活性要比碳納米管好。三種方法比較得出,共沉淀法合成的Fe_3O_4/CNTs活性最優(yōu)。此技術(shù)具有降解效率高,速度快,成本低,且沒有中間產(chǎn)物生成,無二次污染等優(yōu)點,在有機廢水處理中具有很好的應(yīng)用前景。
[Abstract]:In this paper, Fe3O _ 4 / C _ 3O _ 3 nanotubes supported by Fe _ 2O _ 3 were prepared, and the catalytic degradation of methyl parathion, Diuronan, Azo-fuchsineine and other organic pollutants in water by microwave technique was studied. In chapter 1, the catalytic degradation of methyl parathion (MPN), dimethylpyrolone (Diuron), azo fuchine (Azo-fuchsine) and other organic pollutants were studied. Carbon nanotubes supported on Fe _ 2O _ 3 were prepared by microwave-hydrothermal method, in which carbon nanotubes (CNTs) were selected for microwave degradation, and the activities of Fe_3O_4/CNTs and CNTs were compared. The results showed that organic pollutants in aqueous solution were organic pollutants. Such as methyl orange, bisphenol A, bisphenol A, methyl parathion, rhodamine, rhodamine, azo fuchineine, can be rapidly and effectively degraded in the Fe3O / 4CNTsMWMWW system supported by iron trioxide, when the microwave hydrothermal pressure is 1.0 Mpa. the reaction is 30 min. When the concentration of Fe ~ (2 +) was 004 mol/L, the activity of Fe_3O_4/CNTs was the highest. When the hydrothermal synthesis pressure was changed to 1.5 MPA, the microwave hydrothermal synthesis time and the concentration of Fe ~ (3) remained unchanged, and the initial concentration was 38 渭 mol/L (that is, 10 mg / L) of methyl parathion. The amount of catalyst was 1.2 g / L, microwave power was 450 W / L 2450 MHz, solution pH was 6.2MW irradiation 15 min, the MP was completely removed. In addition, methyl orange monoxide, bisphenol A BPAP, methyl parathion, Rhodamine B Rh B) and azo fuchsin (Azo-fuchsine) aqueous solution were degraded in Fe_3O_4/CNTs/MW system. The kinetic rate constants K of degradation were 0.925 ~ 0.845 ~ 0.753N ~ 0.993 and 0.943 respectively. Therefore, the microwave catalytic activity of Fe3O _ 4 / CNTs was higher than that of CNTs under the same synthetic and degradation conditions. In chapter 2, microwave hydrothermal method was used. Carbon nanotubes supported on Fe _ 2O _ 4 were prepared by hydrothermal method and co-precipitation method, and their activity was compared. The diameter of carbon nanotubes was 20-40 nm. For example, bisphenol A (BPA), azofuchine (Azo-fuchine), Diuronon (Diuron), methyl parathion (MPP), methyl orange (MOO) and Rhodamine (BHb) can be removed quickly and effectively in Fe_3O_4/CNTs/MW system. The Fe3 concentration of Fe_3O_4/CNTs prepared by hydrothermal method and co-precipitation method was 002 mol / L, and the three Fe_3O_4/CNTs catalysts were prepared at 0.4g / L, respectively, and reacted with 25mL, 10mg / L Diuron, respectively, for 1.0 minutes. The degradation rates of 43.91W and 60.37W are 43.91W and 60.37W respectively. Therefore, the order of microwave catalytic activity of Fe3O4 / CNTs is as follows: coprecipitation hydrothermal synthesis microwave hydrothermal method. In summary, Fe3O4 / CNTs and carbon nanotubes have MW catalytic activity. Fe _ 2O _ 3 / carbon nanotubes combined with microwave can rapidly and effectively degrade organic pollutants in wastewater. The degradation activity of Fe _ 2O _ 3 / carbon nanotubes under microwave irradiation is better than that of carbon nanotubes. The Fe_3O_4/CNTs synthesized by coprecipitation method has the advantages of high degradation efficiency, high speed, low cost, no intermediate product formation and no secondary pollution, so it has a good application prospect in organic wastewater treatment.
【學(xué)位授予單位】：遼寧大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：O643.36;X703

【參考文獻】

相關(guān)期刊論文 前6條

1 陳文華;李剛;許方程;泮t;溫玲寧;都林娜;;染料廢水污染現(xiàn)狀及處理方法研究進展[J];浙江農(nóng)業(yè)科學(xué);2014年02期

2 高志謹;秦兵杰;趙麗;任思蒙;朱子涵;;高級氧化技術(shù)治理偶氮染料廢水[J];化工中間體;2013年04期

3 李銳;楊驥;曹禮梅;;碳納米管的制備方法及在環(huán)保領(lǐng)域中的應(yīng)用[J];裝備環(huán)境工程;2011年02期

4 趙玉增;齊永曉;張俊喜;;碳納米管的制備與應(yīng)用研究進展[J];上海電力學(xué)院學(xué)報;2010年04期

5 張春紅;白艷紅;陳杰tb;王剛;;有機磷農(nóng)藥廢水降解方法研究新進展[J];水處理技術(shù);2010年01期

6 付佳;許啟明;李寧;;納米四氧化三鐵化學(xué)法制備及其應(yīng)用[J];無機鹽工業(yè);2007年10期

，

本文編號：1535201