本文選題：鐵/錳/鋁-柱撐蒙脫石 + 催化濕式過氧化氫氧化法�。� 參考：《西北大學(xué)》2017年碩士論文

【摘要】：現(xiàn)階段,染料行業(yè)飛速發(fā)展,染料廢水的處理已備受關(guān)注,此類廢水具有結(jié)構(gòu)穩(wěn)定、COD高、難生物降解等特點(diǎn),一般處理方法效率低下。因此,降解染料廢水的技術(shù)和相應(yīng)催化劑的制備對(duì)于降解效率至關(guān)重要。論文研究使用離子交換法,制備鐵/錳/鋁-柱撐蒙脫石(Fe/Mn/Al-Mt)。實(shí)驗(yàn)重點(diǎn)考察Fe-Mn摩爾比、活性金屬負(fù)載量(AML)、焙燒溫度、制備方法、粘土懸浮液濃度等一系列制備條件對(duì)Fe/Mn/Al-Mt催化性能的影響。結(jié)合FT-IR、XRD、DRUV-vis、N2-吸附/脫附、SEM、TG/DTG等表征技術(shù)以及CWPO降解酸性橙Ⅱ(AOII)模擬廢水的效果參數(shù)(色度去除率、COD去除率、Fe離子溶出量)對(duì)Fe/Mn/Al-Mt整體形貌、催化活性以及穩(wěn)定性進(jìn)行評(píng)估。實(shí)驗(yàn)結(jié)果表明,經(jīng)過柱撐后,載體結(jié)構(gòu)明顯改善,當(dāng)Fe-Mn摩爾比為8/2、AML為6%、500 ℃焙燒2 h、引入超聲以及采用干粘土直接制備時(shí),Fe/Mn/Al-Mt催化劑具有較大的比表面積(214m2/g)、活性組分(MnFe204納米粒子)含量高且分散度良好、催化活性高(COD去除率可以達(dá)到81.5%)、穩(wěn)定性良好(樣品重復(fù)使用五次,水樣的COD去除率仍可達(dá)到74.1%、五次反應(yīng)Fe離子溶出總和為1.233 mg/L)等特點(diǎn)。另外,采用超聲輔助以及干粘土直接制備Fe/Mn/Al-Mt催化劑一個(gè)制備周期內(nèi)可節(jié)省約80%的時(shí)間,制備1 g催化劑可節(jié)省50 mL的水。實(shí)驗(yàn)采用CWPO技術(shù),以6%-Fe/Mn/Al(8/2)-(D)Mt(U,500℃)為反應(yīng)催化劑來降解含酸性橙Ⅱ的模擬廢水,以COD的去除效果以及鐵離子的溶出作為指標(biāo),聯(lián)立單因素實(shí)驗(yàn)和響應(yīng)面分析法中的BBD中心實(shí)驗(yàn)方法對(duì)降解過程中的工藝條件(溫度、入水pH、Fe/Mn/Al-Mt樣品加入量、H202濃度)進(jìn)行優(yōu)化選擇。結(jié)果表明:影響CWPO降解酸性橙降解Ⅱ模擬染料廢水的強(qiáng)度順序?yàn)闇囟热胨畃HFe/Mn/Al-Mt投加量H202濃度,通過Design-expert軟件得出的最佳工藝條件:反應(yīng)溫度=60 ℃、pH = 3.5、催化劑用量為0.50 g/L和H2O2加入量為24 mM,理論上COD去除率可以達(dá)到83.2%,Fe的溶出率0.588 mg/L。最后,對(duì)CWPO降解模擬廢水(AOII)動(dòng)力學(xué)進(jìn)行探究。采用了 Fermi's equation半經(jīng)驗(yàn)動(dòng)力學(xué)方程對(duì)在不同溫度下反應(yīng)的酸性橙Ⅱ濃度變化(C/Co)進(jìn)行擬合,得出lnK與1/T的線性關(guān)系,根據(jù)Arrhenius方程得此反應(yīng)的表觀活化能(Ea)為48.65 KJ/mol。相比之前的文獻(xiàn)中的報(bào)道,反應(yīng)過程中的表觀活化能更低,促使CWPO處理染料廢水效率更高。
[Abstract]:At present, with the rapid development of dye industry, the treatment of dyestuff wastewater has attracted much attention. It has the characteristics of stable structure, high COD, difficult biodegradation and so on, and the general treatment method is inefficient. Therefore, the technology of dye wastewater degradation and the preparation of corresponding catalysts are very important for the degradation efficiency. The preparation of Fe / mn / Al pillared montmorillonite (Fe / mn / Al / Al) montmorillonite by ion exchange method was studied in this paper. The effects of Fe-Mn molar ratio, active metal loading amount, calcination temperature, preparation method and concentration of clay suspension on the catalytic performance of Fe/Mn/Al-Mt were investigated. The overall morphology, catalytic activity and stability of Fe/Mn/Al-Mt were evaluated by using the characterization techniques such as FT-IRN DRUV-visN _ 2-sorption / desorption and CWPO degradation of acid orange 鈪，

本文編號(hào)：1796150