电晕放电等离子体降解酸性嫩黄2G及其机理探究
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摘要
用电晕放电等离子体来降解染料废水中的酸性嫩黄2G,探讨了不同条件对酸性嫩黄2G去除率的影响。实验结果显示:电晕放电等离子体可有效降解酸性嫩黄2G;在放电功率90 W、频率5 kHz、初始质量浓度20 mg/L、电极间距5 mm、空气流速1.6 L/min的条件下反应30 min,酸性嫩黄2G的去除率可达到98.46%;降解反应遵循一级反应动力学。酸性嫩黄2G废水经放电处理后的中间产物主要为甲酸、乙酸、哌嗪、乳酸、R-3-氨基哌啶、对硝基苯酚、对甲基苯甲酸、2,3-氨基-1-丁烯、1-羟基-2-氨基丙烯、2-氨基丁烷、丙二酸、顺丁烯二酸等,这表明酸性嫩黄2G的降解过程中有N=N的断裂,以及苯环上的Cl原子被取代等反应。
Corona discharge plasma was used to degrade the acid brilliant yellow 2G in dyeing waste water, and its effect on the removal rate of acid yellow 2G at different conditions was discussed. The results of the experiments showed that the corona discharge plasma had effectively degrade the acid yellow 2G solution. The removal rate of acid yellow 2G could reach 98.46% with the reaction time for 30 min, under the conditions of discharge power to be 90 W, frequency 5 kHz, initial concentration 20 mg/L, electrode spacing 5 mm, air velocity 1.6 L/min. The degradation reaction followed the first order reaction kinetics. The intermediate products of acid yellow 2G waste water were mainly formic acid, acetic acid, piperazine, lactic acid, R-3-aminodroperidine, p-nitrophenol, p-methylbenzoic acid, 2,3-amino-1-butene, 1-hydroxyl-2-amino-propylene, 2-aminobutane, malonic acid, maleic acid, etc. This indicated that N=N was broken during the degradation of acid yellow 2G, and the Cl atom on the benzene ring was substituted.
Corona discharge plasma was used to degrade the acid brilliant yellow 2G in dyeing waste water, and its effect on the removal rate of acid yellow 2G at different conditions was discussed. The results of the experiments showed that the corona discharge plasma had effectively degrade the acid yellow 2G solution. The removal rate of acid yellow 2G could reach 98.46% with the reaction time for 30 min, under the conditions of discharge power to be 90 W, frequency 5 kHz, initial concentration 20 mg/L, electrode spacing 5 mm, air velocity 1.6 L/min. The degradation reaction followed the first order reaction kinetics. The intermediate products of acid yellow 2G waste water were mainly formic acid, acetic acid, piperazine, lactic acid, R-3-aminodroperidine, p-nitrophenol, p-methylbenzoic acid, 2,3-amino-1-butene, 1-hydroxyl-2-amino-propylene, 2-aminobutane, malonic acid, maleic acid, etc. This indicated that N=N was broken during the degradation of acid yellow 2G, and the Cl atom on the benzene ring was substituted.
引文
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[2]MASUDA S.Pulse corona induced plasma chemical process:a horizon of new plasma chemical technologies[J].Pure&Applied Chemistry,1988,60:727-731.
[3]WANG Huijuan,GUO He,YANG Wenming,et al.Formation of hydrogen peroxide and degradation of dye wastewater by pulsed discharge plasma combined with activated carbon[J].High Voltage Engineering,2016,42(5):1 401-1 408.
[4]YANG Changhe,LIU Jianhui,CAO Zhirong,et al.Treatment of fuchsia basic in water by DBD advanced oxidation coupling with activated carbon adsorption[J].High Voltage Engineering,2016,42(2):392-397.
[5]张鹏,洪延姬,沈双晏,等.等离子体中活性粒子分析及化学动力学机理[J].强激光与粒子束,2015,27(3):32-37.
[6]RONG Shaopeng,SUN Yabing.Wetted-wall corona discharge induced degradation of sulfadiazine antibiotics in aqueous solution[J].Journal of Chemical Technology and Biotechnology,2014,89(9):1 351-1 359.
[7]何寿杰,张钊,李庆.针板负直流电晕放电中的脉冲等离子体特性[J].高压电技术,2018,44(3):870-875.
[8]杨长河,曹志荣,丁堃.介质阻挡放电等离子体处理酸性大红GR废水[J].水处理技术,2012,38(5):96-100.
[9]胡志军,王志良.脉冲电晕放电低温等离子体分解NH3的动力学及机理研究[J].化工环保,2017,37(4):466-470.
[10]王晓艳.隔膜辉光放电处理水中污染物的研究[D].天津:南开大学,2014.
[11]许越.化学反应动力学[M].北京:化学工业出版社,2005.
[12]冯景伟,郑正,罗兴章,等.气液混合放电对水中阿特拉津的降解[J].环境化学,2008,27(6):707-711.
[13]张梦怡,孙亚兵,蒋浩.电晕放电等离子体对水中邻苯二甲酸二甲酯的降解[J].环境工程学报,2016,10(8):4 004-4 010.
[14]李善评,曹翰林,胡振.电化学法去除水中酸性嫩黄2G的研究[J].给水排水,2006,32(12):53-56.
[15]LIU F C,YAN W,WANG D Z.Phenomena of oscillations in atmospheric pressure direct current glow discharges[J].Physics of Plasmas,2013,20(12):1 263-1 270.