电催化氧化降解对乙酰氨基酚的实验研究
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摘要
通过单因素实验探究电催化氧化降解对乙酰氨基酚过程中时间、pH、电流密度、极板间距对其去除效率的影响。实验结果表明,在反应时间为120 min、初始pH为9、电流密度为20 m A/cm2、极板间距为1 cm的条件下,对乙酰氨基酚的去除效率达到90%以上;电催化氧化降解对乙酰氨基酚的过程符合伪一级动力学模型(R2>0.983)。GC-MS分析结果表明,电催化氧化降解对乙酰氨基酚过程中生成多种有机物,通过标准图谱对照分析,推断出降解过程中可能产生了乙醇酸、乙二酸、苯醌、丁二酸等物质。
The effects of time,pH,current density and plate spacing on the removal efficiency of acetaminophen are studied via single factor experiment in the process of electrocatalytic oxidation.The results show that the removal rate of acetaminophen can exceed 90% when the reaction time is set for 120 min,pH = 9,the current density is 20 mA·m~(-2) and the plate spacing is 1 cm.The degradation of acetaminophen via electrocatalytic oxidation method conforms to the pseudofirst-order kinetics model(R2>0.983).The results by GC-MS show that many organic substances are generated during the degradation of acetaminophen,which may possibly include glycolic acid,oxalic acid,benzoquinone,succinic acid and other substances through contrast analysis with standard mass spectral data.
The effects of time,pH,current density and plate spacing on the removal efficiency of acetaminophen are studied via single factor experiment in the process of electrocatalytic oxidation.The results show that the removal rate of acetaminophen can exceed 90% when the reaction time is set for 120 min,pH = 9,the current density is 20 mA·m~(-2) and the plate spacing is 1 cm.The degradation of acetaminophen via electrocatalytic oxidation method conforms to the pseudofirst-order kinetics model(R2>0.983).The results by GC-MS show that many organic substances are generated during the degradation of acetaminophen,which may possibly include glycolic acid,oxalic acid,benzoquinone,succinic acid and other substances through contrast analysis with standard mass spectral data.
引文
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[3]Xie Guohong,Chang Xin,Bal Ram Adhikari,et al. Photoelectrochemical degradation of acetaminophen and valacyclovir using nanoporous titanium dioxide[J]. Science Direct,2016,37(7):1062-1069.
[4]Lorphensri O,Intravijit J,Sabatini D A,et al.Sorption of acetaminophen,17α-ethynyl estradiol,nalidixic acid,and norfloxacin to silica,alumina,and a hydrophobic medium[J]. Water Res,2006,40(7):1481-1491.
[5]戴梦莎.纳米四氧化三铁与零价铁类芬顿法处理对乙酰氨基酚的研究[D].杭州:浙江工业大学,2015.
[6]Wang Kaidong,Huang Ke,Jiang Guoqiang. Enhanced removal of aqueous acetaminophen by a laccase-catalyzed oxidative coupling reaction under a dual-pH optimization strategy[J]. Science of the Total Environment,2018,16(7):1270-1278.
[7]Kai H,Ishibashi Y,Mori T,et al.Decolorization and estrogenic activity of colored livestock wastewater after electrolysis treatment[J].Journal of Material Cycles and Waste Management,2010,12(2):128-135.
[8]Kishimoto N,Morita Y,Tsuno H,et al. Characteristics of electrolysis,ozonation,and their combination process on treatment of municipal wastewater[J].Water Environment Research,2007,79(9):1033-1042.
[9]Andreozzi R,Caprio V,Marotta R,et al.Paracetamol oxidation from aqueous solutions by means of ozonation and H2O2/UV system[J].Water Research,2003,37(5):993-100.
[10]岳婵媛,繆恒锋,任洪艳,等.饮用水中甲羟孕酮的臭氧氧化研究[J].环境科学,2012,33(4):1227-1233.
[11]Schwarzenbach R P,Gschwend P M,Imboden D M,著,王连生,等译.环境有机化学[M].北京:化学工业出版社,2004:411-460.
[12]Yutaka,Sakakibara.Measurement of mass transfer coefficients with an electrochemical method using dlute electrolyte solutions[J].Water Research,1994,28(1):9-16.
[13]曹飞,袁守军等.臭氧氧化水溶液中对乙酰氨基酚的机制研究[J].环境科学,2014,35(11):4185-4191.