UV/TiO_2光催化氧化处理鲁奇废水生化出水的试验研究
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摘要
采用UV/TiO_2反应体系对鲁奇废水生化出水进行了光催化氧化试验,考察了pH、TiO_2投加量、反应时间和外加H_2O_2对COD_(Cr)去除率的影响。结果表明:中性及酸性条件下更有利于UV/TiO_2光催化降解鲁奇废水生化出水中的COD_(Cr);在pH值=7和1.0 g/L TiO_2投加量条件下,反应4 h后,COD_(Cr)去除率为61.17%。UV/TiO_2反应体系外加一定量H_2O_2是否会提高其COD_(Cr)去除率与具体的反应体系有关。
Photocatalytic removal of COD_(Cr) from the biochemical effluent of Lurgi coal gasification wastewater by UV/TiO_2 was studied.The main factors affecting the removal rate of COD_(Cr) were analyzed, including pH value, TiO_2 dosage, reaction time and addition of H_2 O_2.Experimental results showed that the neutral or acidic conditions were favored for the photocatalytic removal of COD_(Cr) from the biochemical effluent of Lurgi wastewater by UV/TiO_2. Under the conditions that pH value was 7 and TiO_2 dosage was 1.0 g/L, the removal rate of COD_(Cr)was 61.17% after 4 hours. The effect of the addition of H_2 O_2 on the removal rate of COD_(Cr) depends on the composition of the reaction.
Photocatalytic removal of COD_(Cr) from the biochemical effluent of Lurgi coal gasification wastewater by UV/TiO_2 was studied.The main factors affecting the removal rate of COD_(Cr) were analyzed, including pH value, TiO_2 dosage, reaction time and addition of H_2 O_2.Experimental results showed that the neutral or acidic conditions were favored for the photocatalytic removal of COD_(Cr) from the biochemical effluent of Lurgi wastewater by UV/TiO_2. Under the conditions that pH value was 7 and TiO_2 dosage was 1.0 g/L, the removal rate of COD_(Cr)was 61.17% after 4 hours. The effect of the addition of H_2 O_2 on the removal rate of COD_(Cr) depends on the composition of the reaction.
引文
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[2]高濂,郑珊,等.纳米氧化钛光催化材料及应用[M].北京:化学工业出版社,2002.
[3]李士勇,丁琳,孙衍宁,等.TiO_2/H_2O_2光催化处理杨木APMP废水的探讨[J].大连工业大学学报,2008,27(3):245-249.
[4]吴顺梅,李凡修,汪小宇,等.影响TiO_2光催化活性的因素分析综述[J].中国石油大学胜利学院学报,2006,20(2):3-6.
[5]张冉.非均相催化臭氧氧化深度处理煤化工废水[D].哈尔滨:哈尔滨工业大学,2011.
[6]鲁秀国,孟锋,涂泥沁.H_2O_2协同TiO_2光催化处理模拟苯胺废水[J].化工环保,2012,32(6):489-492.
[7]王常顺,佘江波,张国防.H_2O_2协同作用下的多通道光催化反应体系研究[J].陕西师范大学学报(自然科学版),2014,42(4):45-49.
[8]Zhang Q,Li C L,Li T.Rapid photocatalytic decolorization of methylene blue using high photon flux UV/TiO_2/H_2O_2 process[J].Chemical Engineering Journal,2013,217(1):407-413.
[9]唐建军,范小江,邹原,等.H_2O_2在TiO_2可见光催化反应中的作用机理[J].中国有色金属学报,2009,19(2):292-297.
[10]Nguyen A T.Hsieh C T,Juang R S.Substituent effects on photodegradation of phenols in binary mixtures by hybrid H_2O_2 and TiO_2 suspensions under UV irradiation[J].Journal of the Taiwan Institute of Chemical Engineers,2016,62(3):68-75.
[11]牟伟腾,安洪光,岳培恒,等.重铬酸钾法与氧化微回流法测定COD的对比试验研究[J].化工技术与开发,2012,41(12):41-43.
[12]尹艳华,胡学敏,黎汉生.纳米二氧化钛光催化降解硝基甲苯类废水的试验研究[J].应用基础与工程科学学报,2010,18(s1):26-32.
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[14]王磊,夏璐,鲁栋梁,等.二氧化钛紫外光催化降解甲基橙废水的动力学研究[J].化学与生物工程,2010,27(3):27-31.
[15]李桂英,安太成,陈嘉鑫,等.光电催化氧化处理高含氯采油废水的研究[J].环境科学研究,2006,19(1):30-34.
[16]李进辉,王海峰,丁慧,等.沸石负载型TiO_2的制备及其降解含酚废水的研究[J].广州化工,2012,40(5):96-98.
[17]邓泥沁.纳米二氧化钛光催化降解典型有机污染物性能的研究[D].广州:华南理工大学,2004.
[18]陈国宁,王双飞,宋海农.TiO_2光催化处理漂白废水的影响因素[J].纸和造纸,2004,23(s1):59-63.
[19]周时凤,洪樟连,王民权.TiO_2光催化降解有机污染物机理和影响因素[J].材料导报,2004,18(7):80-89.
[20]潘媛媛.磁性壳聚糖的改性及其对模拟废水的处理研究[D].太原:中北大学,2014.
[21]Harir M,Gaspar A,Kanawati B,et al.Photocatalytic reactions of imazamox at TiO_2 H_2O_2 and TiO_2/H_2O_2 in water interfaces:Kinetic and photoproducts study[J].Applied Catalysis B:Environmental,2008,84(3):524-532.
[22]黄惠莉,黄秒良,蔡阿娜,等.二氧化钛光催化降解处理染料废水[J].化工环保,2002,22(2):84-87.
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[24]范小江.TiO_2-H_2O_2光芬顿的可见光催化活性研究[D].长沙:中南大学,2009.
[25]Kumar S,Davis A P.Heterogeneous photocatalytic oxidation of nitrotoluenes[J].Water Environment Research,1997,69(7):1238-1245.
[26]李翠翠.造纸污水光催化处理及过程控制系统的研究[D].广州:华南理工大学,2010.
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[28]李俊妮.纳米TiO_2光催化在废水处理中的应用[J].化工中间体,2012,9(2):53-58.