本文關(guān)鍵詞：天然礦物材料非均相Fenton反應(yīng)評(píng)價(jià)與優(yōu)化　出處：《哈爾濱理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 非均相Fenton反應(yīng) 天然礦物 麥飯石 電氣石 響應(yīng)曲面法

【摘要】：非均相Fenton技術(shù)對(duì)有機(jī)廢水具有較好的降解效果,最近幾年吸引了越來越多學(xué)者的關(guān)注。本研究以天然礦物材料麥飯石和鐵電氣石為原材料,采用液相沉積法在麥飯石表面原位生長(zhǎng)磁性納米Fe_3O_4顆粒(MFM),采用低溫?zé)Y(jié)法制造多孔電氣石陶粒(PSC),以這兩種材料作為非均相Fenton催化劑。運(yùn)用X射線衍射(XRD)、傅里葉紅外光譜(FT-IR)、掃描電子顯微鏡(SEM)、透射電子顯微鏡(TEM)、Zeta電位儀和振動(dòng)磁強(qiáng)計(jì)(VSM)等測(cè)試技術(shù)對(duì)MFM和PSC樣品進(jìn)行表征。以有機(jī)染料甲基橙(MO)和亞甲基藍(lán)(MB)為目標(biāo)污染物,評(píng)價(jià)這兩種材料的非均相Fenton反應(yīng)效能,并采用響應(yīng)曲面法(RSM)對(duì)工藝參數(shù)進(jìn)行優(yōu)化分析。對(duì)于MFM非均相催化劑,分析測(cè)試結(jié)果表明:Fe_3O_4粒子分布均勻,通過化學(xué)鍵連接,Fe_3O_4生長(zhǎng)牢固,具有較強(qiáng)的磁性能,能夠通過外加磁鐵迅速分離。當(dāng)以85%的Fe_3O_4含量,95 oC的水浴溫度,3 h的合成時(shí)間,制備的MFM復(fù)合催化劑用量為1 g/L時(shí),對(duì)MO染液的脫色率達(dá)84.61%。效能評(píng)價(jià)結(jié)果表明:隨著溶液初始pH值、初始H_2O_2濃度的增加,MO有機(jī)染料的脫色率呈現(xiàn)先上升后下降的趨勢(shì);隨著MFM用量、反應(yīng)溫度的增加MO有機(jī)染料的脫色率逐漸提高;隨著MO有機(jī)染料初始濃度的變大,MO的脫色率減小。RSM優(yōu)化分析表明:pH值3.1、H_2O_2濃度14.98 mM,催化劑用量2.13 g/L、反應(yīng)時(shí)間120 min,此條件下MO有機(jī)染料的實(shí)際脫色率為81%,與預(yù)測(cè)值81.75%相對(duì)誤差為0.75%,表明模型的準(zhǔn)確可靠性高。對(duì)于PSC非均相Fenton催化劑,分析測(cè)試結(jié)果表明:多孔電氣石陶粒表面疏松多孔。效能評(píng)價(jià)結(jié)果表明:當(dāng)溶液的初始pH值、初始H_2O_2濃度增加時(shí),MB的脫色率先上升后下降;而當(dāng)催化劑用量、反應(yīng)溫度增加時(shí),MB的脫色率逐漸上升;隨著MB濃度的增加,MB的脫色率呈減小趨勢(shì)。RSM優(yōu)化分析表明:pH值2.41、H_2O_2濃度為9.85 mM,催化劑用量6.98 g/L、反應(yīng)時(shí)間99 min,此條件下的MB實(shí)際脫色率為99.65%,與預(yù)測(cè)值100.05%的相對(duì)誤差為0.4%,說明模型的準(zhǔn)確可靠性高。
[Abstract]:Heterogeneous Fenton technology has a good degradation effect on organic wastewater, which has attracted more and more attention of scholars in recent years. In this study, the natural mineral materials Maifanite and ferrotourmaline were used as raw materials. Magnetic nanocrystalline Fe_3O_4 particles were grown in situ on the surface of Maifan stone by liquid phase deposition. Porous tourmaline ceramics were prepared by low temperature sintering. The two kinds of materials were used as heterogeneous Fenton catalysts. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were used. Transmission electron microscopy (TEM). The MFM and PSC samples were characterized by Zeta potentiometer and vibratory magnetometer. The organic dyes methyl orange and methylene blue were used as the target pollutants. The efficiency of heterogeneous Fenton reaction of these two materials was evaluated, and the process parameters were optimized by response surface method (RSM). For MFM heterogeneous catalyst. The results of analysis and test show that the particles of Fe3O _ 4 are evenly distributed, and the Fe3O _ 4 has strong magnetic properties. It can be separated quickly by applying magnets. When the synthesis time is 3 h at the water bath temperature of 95 鈩，

本文編號(hào)：1421962