本文選題：電催化氧化 + Ti/Sn�。� 參考：《西南科技大學》2015年碩士論文

【摘要】：高毒性、難降解的苯系廢水會對環(huán)境和人類造成嚴重危害,該類廢水的治理問題已成為水處理領域難點部分,因此,尋找有效的治理方法迫在眉睫。電催化氧化技術具有良好的環(huán)境兼容性和普遍的適用性,在廢水處理領域得到了廣泛的關注與應用。在電催化氧化處理廢水過程中,陽極材料對有機污染物的降解效果起著至關重要的作用,尤其對處理過程所耗能量和氧化降解效率的影響較大。本論文制備了電催化活性較高的、穩(wěn)定性較好的電極材料,并將其分別應用于多種苯系廢水的電催化氧化處理中。主要的研究內(nèi)容如下:采用微波等離子氣相沉積法制備了摻硼金剛石電極,以該電極為陽極,不銹鋼電極作為陽極與陰極,電催化降解間二硝基苯廢水。實驗結果表明,在較佳的降解條件下,即電流密度為10 m A cm-2、溫度為30℃、p H為7.0、Na2SO4電解質濃度為4.0 g L-1、間二硝基苯的初始濃度為125 mg L-1,處理間二硝基苯廢水150 min,間二硝基苯的去除率可達82.7%。對間二硝基苯的電催化降解過程的數(shù)據(jù)分析,結果顯示,間二硝基苯的降解符合一級動力學方程。紫外光譜和高效液相色譜分析表明,間二硝基苯在240 min以后會被完全礦化。采用刷涂法制備了Ti/Sn O2-Ru O2電極,分別以該電極與不銹鋼電極作為陽極與陰極,電催化降解處理4-硝基苯甲醛廢水。實驗結果表明,在較佳的降解條件下,即電解質Na2SO4的濃度為8.0×10-2 mol L-1、p H為2.5、電解電壓為3 V,處理4-硝基苯甲醛廢水180 min,4-硝基苯甲醛去除79.8%,CODCr去除率達82.3%。對4-硝基苯甲醛的電催化降解過程的數(shù)據(jù)分析可知,4-硝基苯甲醛的降解符合一級動力學方程。采用電沉積法制備了Ti/Pb O2電極和Ti/Pb O2-Yb2O3電極,并將其用作陽極,不銹鋼電極為陰極,電催化氧化降解二硝基重氮酚廢水。實驗結果表明,Ti/Pb O2-Yb2O3電極的結構更為緊密,析氧電位較高,電催化降解性能更好。在較佳的降解條件下,即電流密度為10 m A cm-2、初始p H為3.0、Na2SO4電解質濃度為12.5 g L-1,處理二硝基重氮酚廢水150 min,二硝基重氮酚的去除率和CODCr的去除率分別為92.9%和89.5%。采用溶膠凝膠法制備了Ti/Sn O2-Sb電極與摻雜Cu的Ti/Sn O2-Sb-Cu電極。分別使用Ti/Sn O2-Sb或Ti/Sn O2-Sb-Cu電極為陽極,不銹鋼電極為陰極,電催化降解2,4,6-三硝基苯酚廢水。實驗結果表明,Ti/Sn O2-Sb-Cu電極結構更為緊密,電催化降解性能更好。在較佳的降解條件下,即電流密度為5 m A cm-2、初始p H為3.0、Na Cl電解質濃度為8.0 g L-1,處理2,4,6-三硝基苯酚廢水150 min,2,4,6-三硝基苯酚廢水中CODCr去除率為91.3%,三硝基苯酚的去除率為92.7%。本論文的研究結果表明,電催化氧化法是一種有效的處理方法,為苯系有機廢水的處理提供了更為廣闊的思路。Ti/Sn O2-Ru O2電極、摻硼金剛石電極、Ti/Pb O2-Yb2O3電極以及Ti/Sn O2-Sb-Cu電極在難降解的有機廢水處理領域具有較好的應用前景。
[Abstract]:Highly toxic and refractory benzene-series wastewater will cause serious harm to the environment and human beings. The treatment of this kind of wastewater has become a difficult part in the field of water treatment. Therefore, it is urgent to find effective treatment methods. Electrocatalytic oxidation technology has been widely used in wastewater treatment due to its good environmental compatibility and universal applicability. In the process of electrocatalytic oxidation treatment of wastewater, anode materials play an important role in the degradation of organic pollutants, especially on the energy consumption and oxidation degradation efficiency of the treatment process. In this paper, electrode materials with high electrocatalytic activity and good stability were prepared and applied to the electrocatalytic oxidation treatment of various benzene-series wastewater. The main research contents are as follows: boron doped diamond electrode was prepared by microwave plasma vapor deposition. The electrode was used as anode and stainless steel electrode as anode and cathode to degrade m-dinitrobenzene wastewater by electrocatalysis. The experimental results show that under better degradation conditions, That is, the current density is 10 m A cm-2, the temperature is 30 鈩，

本文編號：2045472