不同电极材料用于电化学处理炼油二级出水回用中浓缩水的研究
发布时间：2018-08-05 14:18
【摘要】：本文以研究不同电极材料在炼油二级出水回用时产生的浓缩液的电化学氧化降解污染物为目的，以Ti/RuO2-TiO2-SnO2、Ti/SnO2-Sb2O5、Ti/BDD、Ti/PbO2为阳极材料，应用恒电流法进行降解，以TOC、COD、氨氮、废水硬度等为考察指标，评价不同电极材料在实际应用中的前景，研究了不同反应条件，，如：电流密度、氯离子浓度、pH等对降解结果的影响，并对不同电极降解浓缩水的实验条件进行了优化。主要获得了如下结果： （1）根据国家综合污水排放标准，建立了一套适合于炼油二级出水回用时产生的浓缩液在实验室环境下能够进行快速检测、客观评价不同电极材料降解后浓缩水中各项指标的分析方法。 （2）研究了不同电极材料的物理化学性能，以炼油二级出水回用过程中产生的反渗透浓缩水以及超滤浓缩水为研究对象，研究了浓缩水电化学降解过程的特点以及氯离子的影响，结果表明：应用Ti/BDD和Ti/RuO2-TiO2-SnO2处理浓缩水可以得到较好的降解效果，在处理反渗透浓缩水电流密度为20mAcm-2、通电量为2Ah/L时COD的去除率分别为56%和38%，在处理超滤浓缩水电流密度为20mAcm-2、通电量为2Ah/L时COD的去除率分别为63%和47%。上述结果明显优于相同条件下Ti/SnO2-Sb2O5电极得到的25%、23%COD去除率与Ti/PbO2电极得到的31%和30%COD去除率。通过改变实验条件得出Ti/BDD电极的降解效果将受电流密度和pH影响较大，Ti/RuO2-TiO2-SnO2电极的降解效果受氯离子浓度和电流密度影响较大。 （3）对含氯体系下浓缩水的电化学降解过程进行了优化，得出处理反渗透浓缩水以及超滤浓缩水时，Ti/BDD电极在电流密度为20mA cm-2、氯离子浓度为0.2mol L-1条件下当通电量为2Ah/L时COD的去除率分别达到82.1%和91.0%，Ti/RuO2-TiO2-SnO2在电流密度为30mA cm-2，氯离子浓度为0.3mol L-1条件下当通电量为2Ah/L时COD的去除率分别达到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.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X742
本文编号：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.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X742
【参考文献】
相关期刊论文 前1条
1 黄彩海,李合义,魏学东;不同类型有机化合物理论化学耗氧量的数学计算模型[J];中国环境科学;1997年02期
本文编号：2166048
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