不同電極材料用于電化學(xué)處理煉油二級出水回用中濃縮水的研究
發(fā)布時間：2018-08-05 14:18
【摘要】：本文以研究不同電極材料在煉油二級出水回用時產(chǎn)生的濃縮液的電化學(xué)氧化降解污染物為目的，以Ti/RuO2-TiO2-SnO2、Ti/SnO2-Sb2O5、Ti/BDD、Ti/PbO2為陽極材料，應(yīng)用恒電流法進(jìn)行降解，以TOC、COD、氨氮、廢水硬度等為考察指標(biāo)，評價不同電極材料在實際應(yīng)用中的前景，研究了不同反應(yīng)條件，，如：電流密度、氯離子濃度、pH等對降解結(jié)果的影響，并對不同電極降解濃縮水的實驗條件進(jìn)行了優(yōu)化。主要獲得了如下結(jié)果： （1）根據(jù)國家綜合污水排放標(biāo)準(zhǔn)，建立了一套適合于煉油二級出水回用時產(chǎn)生的濃縮液在實驗室環(huán)境下能夠進(jìn)行快速檢測、客觀評價不同電極材料降解后濃縮水中各項指標(biāo)的分析方法。 （2）研究了不同電極材料的物理化學(xué)性能，以煉油二級出水回用過程中產(chǎn)生的反滲透濃縮水以及超濾濃縮水為研究對象，研究了濃縮水電化學(xué)降解過程的特點(diǎn)以及氯離子的影響，結(jié)果表明：應(yīng)用Ti/BDD和Ti/RuO2-TiO2-SnO2處理濃縮水可以得到較好的降解效果，在處理反滲透濃縮水電流密度為20mAcm-2、通電量為2Ah/L時COD的去除率分別為56%和38%，在處理超濾濃縮水電流密度為20mAcm-2、通電量為2Ah/L時COD的去除率分別為63%和47%。上述結(jié)果明顯優(yōu)于相同條件下Ti/SnO2-Sb2O5電極得到的25%、23%COD去除率與Ti/PbO2電極得到的31%和30%COD去除率。通過改變實驗條件得出Ti/BDD電極的降解效果將受電流密度和pH影響較大，Ti/RuO2-TiO2-SnO2電極的降解效果受氯離子濃度和電流密度影響較大。 （3）對含氯體系下濃縮水的電化學(xué)降解過程進(jìn)行了優(yōu)化，得出處理反滲透濃縮水以及超濾濃縮水時，Ti/BDD電極在電流密度為20mA cm-2、氯離子濃度為0.2mol L-1條件下當(dāng)通電量為2Ah/L時COD的去除率分別達(dá)到82.1%和91.0%，Ti/RuO2-TiO2-SnO2在電流密度為30mA cm-2，氯離子濃度為0.3mol L-1條件下當(dāng)通電量為2Ah/L時COD的去除率分別達(dá)到62.3%和71.4%。
[Abstract]:The aim of this paper is to study the electrochemical oxidation degradation pollutants of concentrated solution produced by different electrode materials in secondary effluent from oil refining. Using Ti / Ruo _ 2-TiO _ 2-SnO _ 2 Ti / Sno _ 2-Sb _ 2O _ 5 / TiBDDN / PbO _ 2 as anode material, the degradation is carried out by constant-current method. TOCCOD, ammonia nitrogen and wastewater hardness are used as indexes of investigation. The effects of different reaction conditions, such as current density and chlorine ion concentration pH, on the degradation results were studied. The experimental conditions for the degradation of concentrated water with different electrodes were optimized. The main results are as follows: (1) according to the national comprehensive wastewater discharge standard, a set of concentrate which is suitable for secondary effluent reuse in oil refining can be quickly detected in laboratory environment. Objective evaluation of various indexes of concentrated water after degradation of different electrode materials. (2) physical and chemical properties of different electrode materials were studied. The characteristics of the chemical degradation process of concentrated hydropower and the influence of chloride ions on the reverse osmosis concentrated water and ultrafiltration concentrated water produced during the reuse of secondary effluent from refinery were studied. The results showed that the treatment of concentrated water with Ti/BDD and Ti/RuO2-TiO2-SnO2 had better degradation effect. The removal rates of COD were 56% and 38 when the current density of reverse osmosis condensed water was 20mAcm-2 and the power flux was 2Ah/L. The removal rates of COD were 63% and 47% respectively when the current density of concentrated water was 20mAcm-2 and the power supply was 2Ah/L. The above results are better than the removal rates of 25% and 31% of Ti/SnO2-Sb2O5 electrode and 31% of 30%COD removal rate of Ti/PbO2 electrode under the same conditions. By changing the experimental conditions, it is concluded that the degradation effect of the Ti/BDD electrode will be greatly affected by the current density and pH value. (3) the degradation effect of the Ti / Ruo _ 2-TiO _ 2-SnO _ 2 electrode will be greatly affected by the chloride ion concentration and the current density. (3) the electrolysis of concentrated water in chlorinated system. The chemical degradation process was optimized. The results show that the removal rates of COD at the current density of 20mA cm-2 and chloride concentration of 0.2mol L-1 are 82.1% and 91.0% respectively at the current density of 30mA cm-2 and the chloride ion concentration of 2Ah/L when treated with reverse osmosis concentrated water and ultrafiltration concentrated water, respectively. The results show that the current density of TiRO _ 2-TiO _ 2-SnO _ 2 electrode is 30mA cm-2 and that of chlorine ion is 30mA cm-2. The removal rate of COD reached 62.3% and 71.4% respectively when the concentration of 0.3mol L-1 was 2Ah/L.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：X742
本文編號：2166048
[Abstract]:The aim of this paper is to study the electrochemical oxidation degradation pollutants of concentrated solution produced by different electrode materials in secondary effluent from oil refining. Using Ti / Ruo _ 2-TiO _ 2-SnO _ 2 Ti / Sno _ 2-Sb _ 2O _ 5 / TiBDDN / PbO _ 2 as anode material, the degradation is carried out by constant-current method. TOCCOD, ammonia nitrogen and wastewater hardness are used as indexes of investigation. The effects of different reaction conditions, such as current density and chlorine ion concentration pH, on the degradation results were studied. The experimental conditions for the degradation of concentrated water with different electrodes were optimized. The main results are as follows: (1) according to the national comprehensive wastewater discharge standard, a set of concentrate which is suitable for secondary effluent reuse in oil refining can be quickly detected in laboratory environment. Objective evaluation of various indexes of concentrated water after degradation of different electrode materials. (2) physical and chemical properties of different electrode materials were studied. The characteristics of the chemical degradation process of concentrated hydropower and the influence of chloride ions on the reverse osmosis concentrated water and ultrafiltration concentrated water produced during the reuse of secondary effluent from refinery were studied. The results showed that the treatment of concentrated water with Ti/BDD and Ti/RuO2-TiO2-SnO2 had better degradation effect. The removal rates of COD were 56% and 38 when the current density of reverse osmosis condensed water was 20mAcm-2 and the power flux was 2Ah/L. The removal rates of COD were 63% and 47% respectively when the current density of concentrated water was 20mAcm-2 and the power supply was 2Ah/L. The above results are better than the removal rates of 25% and 31% of Ti/SnO2-Sb2O5 electrode and 31% of 30%COD removal rate of Ti/PbO2 electrode under the same conditions. By changing the experimental conditions, it is concluded that the degradation effect of the Ti/BDD electrode will be greatly affected by the current density and pH value. (3) the degradation effect of the Ti / Ruo _ 2-TiO _ 2-SnO _ 2 electrode will be greatly affected by the chloride ion concentration and the current density. (3) the electrolysis of concentrated water in chlorinated system. The chemical degradation process was optimized. The results show that the removal rates of COD at the current density of 20mA cm-2 and chloride concentration of 0.2mol L-1 are 82.1% and 91.0% respectively at the current density of 30mA cm-2 and the chloride ion concentration of 2Ah/L when treated with reverse osmosis concentrated water and ultrafiltration concentrated water, respectively. The results show that the current density of TiRO _ 2-TiO _ 2-SnO _ 2 electrode is 30mA cm-2 and that of chlorine ion is 30mA cm-2. The removal rate of COD reached 62.3% and 71.4% respectively when the concentration of 0.3mol L-1 was 2Ah/L.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：X742
【參考文獻(xiàn)】
相關(guān)期刊論文 前1條
1 黃彩海,李合義,魏學(xué)東;不同類型有機(jī)化合物理論化學(xué)耗氧量的數(shù)學(xué)計算模型[J];中國環(huán)境科學(xué);1997年02期
本文編號：2166048
本文鏈接：http://sikaile.net/kejilunwen/shiyounenyuanlunwen/2166048.html
最近更新
教材專著
