Mn掺杂TiO_2可见光催化降解水中Microcystin-LRVisible-light Photocatalytic Performance for the Degradation of Microcystin-LR in Water with Mn Doped TiO_2 Nanomaterial
王菲凤;
摘要(Abstract)：
采用溶胶-凝胶法制备Mn掺杂改性的TiO_2纳米光催化剂,研究其可见光催化降解水中MC-LR的效果和动力学机理分析.结果表明:随水中MC-LR初始质量浓度增加,反应速率减小;投加此催化剂0.2 g·L(-1),对初始质量浓度0.1 mg·L(-1),对初始质量浓度0.1 mg·L(-1)的MC-LR水溶液可见光反应12 h后,降解率几乎达100%,矿化度为50.87%,且光催化反应过程符合准一级动力学,其降解表观速率常数为0.132 0 h(-1)的MC-LR水溶液可见光反应12 h后,降解率几乎达100%,矿化度为50.87%,且光催化反应过程符合准一级动力学,其降解表观速率常数为0.132 0 h(-1),矿化速率为0.047 5 h(-1),矿化速率为0.047 5 h(-1);FT-IR分析证实了,MC-LR光催化是吸附和化学氧化降解两个过程的协同作用.Mn-TiO_2纳米材料成为可见光催化去除水体中MC-LR高效节能的新方法.
关键词(KeyWords)： Mn掺杂;TiO_2;可见光催化;矿化;MC-LR
基金项目(Foundation): 福建省科技厅高校产学研课题(2016Y4002);; 福建省科技重大专项专题(2015YZ0001-1)
作者(Authors): 王菲凤;
参考文献(References)：
- [1]DAVIS T W,BERRY D L,BOYER G L,et al.The effects of temperature and nutrients on the growth and dynamics of toxic and non-toxic strains of Microcystis during cyanobacteria blooms[J].Harmful Algae,2009,8(5):715–725.
- [2]SHARMA V K,TRIANTIS T M,ANTONIOU M G,et al.Destruction of microcystins by conventional and advanced oxidation processes:a review[J].Separation and Purification Technology,2012,91:3-17.
- [3]刘成,高乃云,董秉直,等.氯对粉末活性炭吸附微囊藻毒素能力的影响[J].环境科学,2007,28(5):997-1000.
- [4]GAJDEK P,LECHOWSKI Z,BOCHNIA T,et al.Decomposition of microcystin-LR by Fenton oxidation[J].Toxicon,2001,39(10):1575-1578.
- [5]HO L,SAWADE E,NEWCOMBE G.Biological treatment options for cyanobacteria metabolite removal a review[J].Water Research,2012,46(5):1536-1548.
- [6]EL-SHEIKH S M,ZHANG G,EL-HOSAINY H M,et al.High performance sulfur,nitrogen and carbon doped mesoporous anatase-brookite Ti O2photocatalyst for the removal of microcystin-LR under visiblelight irradiation[J].Joumal of Hazardous Materials,2014,280:723-733.
- [7]YANG J,CHEN D X,DENG A P,et al.Visible-light-driven photocatalytic degradation of microcystin-LR by Bi-doped Ti O2[J].Research on Chemical Intermediates,2011,37(1):47-60.
- [8]毛微曦,姬永丰,庚丽丽,等.Mn(NO3)2掺杂Ti O2的制备及光催化性能研究[J].河北北方学院学报(自然科学版),2014,30(2):5-9.
- [9]HU Y,ZHANG X,WEI C.Simple preparation of Mn-N-codoped titania photocatalyst with visible light response[J].Research on Chemical Intermediates,2010,36(1):95-101.
- [10]解庆华,陈延明,翁文婷,等.Mn2O3/Ti O2太阳光催化性能的研究[J].工业水处理,2008,28(4):52-55.
- [11]THIRUVENKATACHARI R,VIGNESWARAN S,MOON I S.A review on UV/Ti O2photocatalytic oxidation process(Journal Review)[J].Korean Journal of Chemical Engineering,2008,25(1):64-72.
- [12]ANTONIOU M G,SHOEMAKER J A,CRUZ A A,et al.LC/MS/MS structure elucidation of reaction intermediates formed during the Ti O2photocatalysis of microcystin-LR[J].Toxicon,2008,51(6):1103-1118.
- [13]赵亮.微囊藻毒素-LR的特征红外光谱[J].光谱学与光谱分析,2006,26(6):1051-1053.
- [14]YANG J,CHEN D X,DENG A P,et al.Visible light-induced N-doped Ti O2nanoparticles for the degradation of microcystin-LR[J].Science China Chemistry,2010,53(8):1793-1800.
- [15]杨静,陈登霞,邓安平,等.掺氮二氧化钛可见光照射降解微囊藻毒素-LR[J].中国科学:化学,2010,40(11):1688-1696.
- [16]ROEGNER A F,BRENA B,GONZALEZ-SAPIENZA G,et al.Microcystins in potable surface waters:toxic effects and removal strategies[J].Journal of Applied Toxicology,2014,34(5):441-457.