本文關(guān)鍵詞：鎳鐵氧體復(fù)合材料的制備及其吸附性能研究　出處：《西安科技大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 鎳鐵氧體 吸附 染料 選擇性 剛果紅 甲基橙

【摘要】：近年來,水體污染越來越嚴(yán)重,染料廢水已成為主要的水體污染源。吸附法是最常用的一種染料廢水處理技術(shù),它效率高、成本低、操作簡(jiǎn)單,但傳統(tǒng)的吸附劑存在再生成本高、難以回收、吸附選擇性低等問題。因此,利用新型、高效、選擇性高且容易回收的功能化磁性材料處理染料廢水,已經(jīng)越來越受到廣大研究者的關(guān)注。論文分別采用水熱法、原位化學(xué)氧化聚合法和化學(xué)還原法合成了活性炭(AC)/NiFe_2O_4、NiFe_2O_4/聚苯胺(PANI)、NiFe_2O_4/PANI/Ag復(fù)合材料,運(yùn)用振動(dòng)樣品磁強(qiáng)計(jì)(VSM)、X射線衍射儀(XRD)、孔結(jié)構(gòu)及比表面積分析、傅里葉紅外光譜儀(FT-IR)等手段對(duì)鎳鐵氧體復(fù)合材料進(jìn)行了表征和分析,并研究了其對(duì)偶氮染料的吸附性能。結(jié)果表明:離子強(qiáng)度對(duì)AC/NiFe_2O_4吸附甲基橙幾乎沒有影響,當(dāng)pH=3.0,吸附劑用量為0.3g時(shí),AC/NiFe_2O_4對(duì)甲基橙的去除率最高,可達(dá)99%以上,且吸附平衡時(shí)間僅為20min;AC/NiFe_2O_4對(duì)甲基橙的吸附符合Langmuir模型,屬于單分子層吸附,由0R_L1和0.11/n0.5可知,吸附很容易進(jìn)行,屬于優(yōu)惠型吸附;熱力學(xué)行為分析表明,吸附過程是自發(fā)的、吸熱的過程;AC/NiFe_2O_4對(duì)甲基橙的吸附符合假二級(jí)動(dòng)力學(xué)模型,由顆粒內(nèi)擴(kuò)散和液膜擴(kuò)散共同控制;利用0.1 mol/L NaOH溶液再生6次后的AC/NiFe_2O_4仍具有良好的磁性能和吸附甲基橙的能力,去除率達(dá)85.10%。當(dāng)吸附劑用量為0.06 g,吸附溫度35℃時(shí),NiFe_2O_4/PANI對(duì)甲基橙的去除率高達(dá)96%以上,吸附時(shí)間為30 min;NiFe_2O_4/PANI對(duì)甲基橙的吸附符合Langmuir模型,屬于單分子吸附,由0R_L1和01/n0.5可知,吸附很容易進(jìn)行,屬于優(yōu)惠型吸附;熱力學(xué)行為分析表明,吸附過程是自發(fā)的、吸熱的過程;Ni Fe_2O_4/PANI對(duì)甲基橙的吸附過程符合假二級(jí)動(dòng)力學(xué)模型,由顆粒內(nèi)擴(kuò)散控制;采用0.1 mol/L HCl溶液再生后的NiFe_2O_4/PANI對(duì)甲基橙的去除效果良好。NiFe_2O_4/PANI/Ag對(duì)茜素紅、剛果紅、甲基橙、亞甲基藍(lán)、羅丹明B五種染料的選擇性吸附結(jié)果表明,NiFe_2O_4/PANI/Ag對(duì)剛果紅的吸附選擇性最高。離子強(qiáng)度的增大促進(jìn)了NiFe_2O_4/PANI/Ag對(duì)剛果紅的吸附,且溫度越低,吸附效果越好;NiFe_2O_4/PANI/Ag對(duì)剛果紅的吸附同時(shí)符合Langmuir模型和Freundlich模型,15℃時(shí)吸附量為207.47 mg/g,由0R_L1和0.11/n0.5可知,吸附很容易進(jìn)行;熱力學(xué)行為分析表明,吸附過程是自發(fā)的、放熱的過程,屬于物理吸附;NiFe_2O_4/PANI/Ag對(duì)剛果紅的吸附過程更適合用假二級(jí)動(dòng)力學(xué)模型擬合,由顆粒內(nèi)擴(kuò)散和液膜擴(kuò)散共同控制;利用0.1 mol/L HCl溶液再生后的NiFe_2O_4/PANI/Ag對(duì)剛果紅仍具有一定的吸附能力。
[Abstract]:In recent years, water pollution is more and more serious, dye wastewater has become the main source of water pollution. The adsorption method is one of the most commonly used dye wastewater treatment technology, it has high efficiency, low cost, simple operation, but the existence of the traditional adsorbent regeneration of high cost, difficult recovery, low selectivity problems. Therefore, the use of new high efficiency, high selectivity, and easy recovery treatment of dye wastewater by magnetic materials, have attracted the attention of the majority of researchers were studied by using hydrothermal method, in situ chemical oxidation polymerization and chemical synthesis of activated carbon (AC) /NiFe_2O_4, NiFe_2O_4/ (PANI), polyaniline NiFe_2O_4/PANI/Ag composite materials, the use of vibration sample magnetometer (VSM), X ray diffraction (XRD), pore structure and specific surface area analysis, Fourier transform infrared spectroscopy (FT-IR) were characterized and analyzed on the composite Nie Tieyang body, and research The adsorption properties of azo dyes have been studied. The results showed that the ionic strength on the adsorption of methyl orange AC/NiFe_2O_4 has almost no effect, when pH=3.0, adsorbent dosage was 0.3g, AC/NiFe_2O_4 of methyl orange on the highest removal rate can reach more than 99%, and the adsorption equilibrium time was 20min; the adsorption of methyl orange AC/NiFe_2O_4 with the Langmuir model, which belongs to the single molecular layer adsorption by 0R_L1 and 0.11/n0.5 shows that the adsorption is easy, which belongs to the preferential adsorption behavior; thermodynamic analysis shows that the adsorption process was spontaneous and endothermic process; AC/NiFe_2O_4 adsorption of methyl orange with the pseudo two order kinetics model, jointly control the intraparticle diffusion and film diffusion; regeneration after 6 times of AC/NiFe_2O_4 have good magnetic properties and adsorption ability of using 0.1 mol/L NaOH solution, the removal rate of 85.10%. when the adsorbent dosage was 0.06 g, adsorption temperature of 35 DEG C, N IFe_2O_4/PANI of methyl orange removal rate was above 96%, the adsorption time is 30 min; the adsorption of methyl orange NiFe_2O_4/PANI with the Langmuir model belongs to the single molecular adsorption by 0R_L1 and 01/n0.5 shows that the adsorption is easy, which belongs to the preferential adsorption; thermodynamic behavior analysis showed that the adsorption process was spontaneous, endothermic process; adsorption Ni Fe_2O_4/PANI of methyl orange with the pseudo two order kinetics model, controlled by the intra particle diffusion effect; using 0.1 mol/L HCl solution regeneration after NiFe_2O_4/PANI removal of methyl orange with good.NiFe_2O_4/ PANI/Ag on Alizarin red, Congo red, methyl orange, methylene blue, selective adsorption of Luo Danming B of five kinds of dyes. The results show that the NiFe_2O_4/PANI/Ag of Congo red the highest adsorption selectivity. The increase of ionic strength to promote the adsorption of Congo red on NiFe_2O_4/PANI/Ag, and the lower the temperature, the adsorption effect is better; N The adsorption of iFe_2O_4/PANI/Ag on Congo red at the same time with the Langmuir model and Freundlich model, 15 degrees when the adsorption amount of 207.47 mg/g, by 0R_L1 and 0.11/n0.5 shows that the adsorption is easy; thermodynamic analysis shows that the adsorption process is spontaneous, exothermic process is physical adsorption; the adsorption process of NiFe_2O_4/PANI/Ag on Congo red is more suitable for false the two level dynamic model fitting, jointly control the intraparticle diffusion and film diffusion; using 0.1 mol/L HCl solution after regeneration of NiFe_2O_4/PANI/Ag still has certain adsorption capacity of Congo red.

【學(xué)位授予單位】：西安科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：X788;O647.3

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 馮連榮;胡豐田;劉成寶;陳豐;徐楠;劉守清;陳志剛;;活性炭-鐵酸鎳磁性催化劑的光催化性能[J];催化學(xué)報(bào);2012年08期

2 高銀浩;張文慶;;納米磁性材料的制備及應(yīng)用的新進(jìn)展[J];廣州化工;2009年05期

3 胡春光;辛偉;李俊良;;鐵錳復(fù)合氧化物吸附偶氮染料酸性紅B的性能研究[J];科學(xué)技術(shù)與工程;2009年10期

4 慶承松;宋浩;陳天虎;吳雪平;謝杰;;凹凸棒石/γ-Fe_2O_3/碳納米復(fù)合材料的制備及其對(duì)苯酚的吸附作用[J];環(huán)境科學(xué)研究;2009年03期

5 徐浩;延衛(wèi);馮江濤;;聚苯胺的合成與聚合機(jī)理研究進(jìn)展[J];化工進(jìn)展;2008年10期

6 武淑艷;吳明忠;李洪波;秦湘閣;;化學(xué)共沉淀法制備鈦酸鋇陶瓷粉體的工藝研究[J];新技術(shù)新工藝;2007年12期

7 胡雙鋒;黃尚宇;周玲;呂書林;;磁學(xué)的發(fā)展與重要磁性材料的應(yīng)用[J];稀有金屬材料與工程;2007年S3期

8 文加波;商丹;;磁性納米Fe_3O_4的研究進(jìn)展[J];中國(guó)鉬業(yè);2007年04期

9 蔡夢(mèng)軍;朱以華;楊曉玲;;磁性Fe_3O_4明膠復(fù)合納米粒子的制備與表征[J];華東理工大學(xué)學(xué)報(bào)(自然科學(xué)版);2006年03期

10 龍超,張全興,陳金龍;大孔弱堿性樹脂對(duì)高水溶性磺酸類染料中間體的吸附[J];應(yīng)用化學(xué);2004年10期

，

本文編號(hào)：1416475