TiO_2/沸石降解水中盐酸四环素的试验研究
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摘要
采用溶胶-凝胶法制备了TiO_2/沸石复合光催化剂,探讨了初始pH、光照强度、反应时间、催化剂投加量、初始浓度对其降解盐酸四环素的影响。结果表明:对于初始浓度为20 mg/L的盐酸四环素溶液(pH=4. 47),加入4 g/L质量比为0. 34的TiO_2/沸石复合光催化剂,暗反应30min,40 W紫外光照射120 min后,盐酸四环素去除率为91. 7%。在合适的条件下,TiO_2/沸石复合光催化剂对盐酸四环素具有良好的处理效果。
TiO_2/zeolite composite photocatalyst was prepared by Sol-gel method. The effects of initial p H,light intensity,reaction time,catalyst dosage and initial concentration on the degradation of tetracycline hydrochloride by titanium TiO_2/zeolite composite photo catalyst were discussed. For 20 mg/L tetracycline hydrochloride solution( p H = 4. 47),4 g/L dosage of TiO_2/zeolite( mass ratio of 0. 34)composite photocatalyst,30 min of dark reaction,120 min of UV irradiation at 40 W,the removal efficiency was 91. 7%. Under suitable conditions,TiO_2/zeolite composite photocatalyst could remove tetracycline hydrochloride effectively.
TiO_2/zeolite composite photocatalyst was prepared by Sol-gel method. The effects of initial p H,light intensity,reaction time,catalyst dosage and initial concentration on the degradation of tetracycline hydrochloride by titanium TiO_2/zeolite composite photo catalyst were discussed. For 20 mg/L tetracycline hydrochloride solution( p H = 4. 47),4 g/L dosage of TiO_2/zeolite( mass ratio of 0. 34)composite photocatalyst,30 min of dark reaction,120 min of UV irradiation at 40 W,the removal efficiency was 91. 7%. Under suitable conditions,TiO_2/zeolite composite photocatalyst could remove tetracycline hydrochloride effectively.
引文
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[2]刘雨霞,鲍艳宇.土壤中四环素类抗生素污染研究进展[J].环境污染与防治,2011,33(8):81-86.
[3]高立红,史亚利,厉文辉,等.抗生素环境行为及其环境效应研究进展[J].环境化学,2013,32(9):1619-1633.
[4]李伟明,鲍艳宇,周启星.四环素类抗生素降解途径及其主要降解产物研究进展[J].应用生态学报,2012,23(8):2300-2308.
[5]吴青峰,洪汉烈,Li Zhaohui.环境中抗生素污染物的研究进展[J].安全与环境工程,2010,17(2):68-72.
[6] Yu B W,Bai Y T,Zhu M,et al. Adsorption behaviorsof tetracycline on magnetic graphene oxide sponge[J].Materials Chemistry and Physics,2017,198(5):283-290.
[7]张俊娟.二氧化钛纳米材料的溶胶凝胶法制备及其光催化性能研究[D].杭州:浙江大学,2011.
[8]姜安玺,徐桂芹,相会强.光催化剂纳米Ti O2的固定化技术研究进展[J].哈尔滨建筑大学学报,2002,35(4):43-46.
[9]刘鑫,刘福田,张宁,等.沸石负载纳米Ti O2光催化剂水处理研究进展[J].硅酸盐通报,2006,25(6):135-139.
[10]程刚,刘静,仝攀瑞. Ti O2/沸石微粒的制备及其光降解甲基橙的性能研究[J].西安工程大学学报,2008,22(2):175-178.
[11]方送生.天然沸石负载型二氧化钛光催化剂的制备与光催化性能[D].长春:吉林大学,2004.
[12]周城.活性炭负载二氧化钛复合材料的制备表征及对活性黄印染废水处理研究[D].武汉:华中科技大学,2015.