普伐他汀的光催化降解性能及机理研究

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Abstract Bi₂WO₆ was synthesized by hydrothermal method and characterized by XPS, XRD, BET, UV-Vis and SEM. The effects of Bi₂WO₆ dosage, pH of solution on the photocatalytic degradation of pravastatin (PR) were investigated by photocatalytic performance experiments. And the main active radicals, intermediates and mechanism were ascertained by in situ capture experiments and the identification of intermediates. The toxicities of PR before and after degradation were evaluated by the acute toxicity tests of luminescent bacteria. The results showed that the prepared Bi₂WO₆ was a flower-like microsphere composed of a large number of nanoplates with orthorhombic crystal. Its mole ratio of elements was Bi:W:O=2.5:1:6.7. Its specific surface area and band gap were 26.67m²/g and 2.74eV, respectively. The optimal conditions for degradation of 10mg/L PR were:0.4g/L Bi₂WO₆ and pH 6.5. Under this condition, 80.6% PR could be degraded, and the mineralization rate was up to 40.2%. By the detection of active radicals, demonstrated that h⁺ was the key active radical while ·OH and ·O₂^- played a supplementary role in this photocatalytic process. The mechanism of photocatalytic degradation of PR was proposed based on the identification of active radicals and intermediates formed during this reaction. The C-C bond, C=C bond, and ester bond of pravastatin were destroyed by the oxidation of h⁺,·OH and ·O₂^-, and the PR was decomposed into small easily degradable organic compounds. In addition, the results of toxicity test showed that the small molecule products did not possess higher toxicity than the PR original solution.

Key words： photocatalytic Bi₂WO₆ pravastatin degradation performance degradation mechanism

Received: 09 November 2017

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Corresponding Authors: 王磊,教授,wl0178@126.com E-mail: wl0178@126.com

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	FAN Jia-min
	WANG Lei
	LIU Ting-ting
	LU Xue
	SUN Chen-xu

Cite this article:

FAN Jia-min,WANG Lei,LIU Ting-ting等. Performance and mechanism of photocatalytic degradation of Pravastatin[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(6): 2157-2166.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I6/2157

[1]	Srinivasa R P, Nageswara R P, Ganduet V. High performance liquid chromatography mass spectrometric method for the simultaneous quantification of pravastatin and aspirin in human plasma:Pharmacokinetic application[J]. Pharmaceutical Analysis, 2012,2(3):206-213.
[2]	Behnaz R, Weihua S, Hanoz S, et al. Treatment of statin compounds by advanced oxidation processes:Kinetic considerations and destruction mechanisms[J]. Radiation Physics and Chemistry, 2011,80:453-461.
[3]	杨程.城市水系統中PPCPs分布及污水处理优化研究[D]. 重庆:重庆大学, 2014.
[4]	Conley J M, Symes S J, Kindelberger S A, et al. Rapid liquid chromatography-tandem mass spectrometry method for the determination of abroad mixture of pharmaceuticals in surface water[J]. Chromatogr. A., 2008,1185:206-215.
[5]	Grung M, Heimstad M S, Moe M, et al. Human and veterinary pharmaceuticals, narcotics, and personal care products in the environment[J]. Chemosphere, 2015,115:95-99.
[6]	Lee H B, Peart T E, Svoboda M L, et al. Occurrence and fate of rosuvastatin, rosuvastatin lactone, and atorvastatin in Canadian sewage and surface water samples[J]. Chemosphere, 2009,77:1285-1291.
[7]	Pereira A M, Silva L J, Meisel L M, et al. Environmental impact of pharmaceuticals from Portuguese wastewaters:geographical and seasonal occurrence, removal and risk assessment[J]. Environmental Research Letters, 2015,136:108-119.
[8]	Miguel M. Santos, Raquel Ruivo, Mónica Lopes-Marques. Statins:An undesirable class of aquatic contaminants?[J]. Aquatic Toxicology, 2016,174:1-9.
[9]	张豪,王春英,李方,等. Bi2WO6可见光催化降解活性艳红X-3B的研究[J]. 中国环境科学, 2010,30(12):1608-1613.
[10]	Kaur A, Kansal S K.Bi2WO6nanocuboids:An efficient visible light active photocatalyst for the degradation of levofloxacin drug in aqueous phase[J]. Chemical Engineering Journal, 2016,302:194-203.
[11]	Yang Z Y, Huang L, Xie Y Y, et al. Controllable synthesis of Bi2WO6 nanoplate self-assembled hierarchical erythrocyte microspheres via a one-pot hydrothermal reaction with enhanced visible light photocatalytic activity[J]. Applied Surface Science, 2017,403:326-334.
[12]	李小芳.新型钨酸铋可见光催化剂的制备改性及降解低浓度甲苯性能研究[D]. 杭州:浙江大学, 2012.
[13]	Zhu S W, Yang C Y, Li F, et al. Improved photocatalytic Bi2WO6/BiOCl heterojunctions:One-step synthesis via an ionic-liquid assisted ultrasonic method and first-principles calculations[J]. Molecular Catalysis, 2017,435:33-48.
[14]	Huang H, Chen H F, Xia Y, et al. Controllable synthesis and visible-light-responsive photocatalytic activity of Bi2WO6 fluffy microsphere with hierarchical architecture[J]. Journal of Colloid and Interface Science, 2012,370:132-138.
[15]	Zhang L S, Wang W Z, Chen Z G, et al. Fabrication of flower-like Bi2WO6 superstructures as high performance visible-light driven photocatalysts[J]. J. Mater. Chem., 2007, 17:2526-2532.
[16]	He J Y, Wang W M, Long F, et al. Hydrothermal synthesis of hierarchical rose-like Bi2WO6 microspheres with high photocatalytic activities under visible-light irradiation[J]. Materials Science and Engineering B, 2012,177:967-974.
[17]	卓艺乔.钨酸铋(Bi2WO6)微晶的制备及太阳光催化性能研究[D]. 咸阳:陕西科技大学, 2013.
[18]	Liu Y M, Ding Z W, Lv H, et al. Hydrothermal synthesis of hierarchical flower-like Bi2WO6 microspheres with enhanced visible-light photoactivity[J]. Materials Letters, 2015,157:158-162.
[19]	陈清华.改性Ti2O纳米带制备及光催化降解水中左氧氟沙星研究[D]. 哈尔滨:哈尔滨工业大学, 2014.
[20]	Curco D, Gimenez J, Addardak A, et al. Effects of radiation absorption and catalyst concentration on the photocatalytic degradation ofpollutants[J]. Catal Today, 2002,76(2/4):177-188.
[21]	Fu H B, Pan C S, Yao W Q, et a1.Visible-Light-Induced Degradation of Rhodamine B by Nanosized Bi2WO6[J]. Journal of Physical Chemistry (B), 2005,109:22432-22439.
[22]	徐秀泉,于小凤,唐燕,等. Ag/Ag3PO4光催化降解乳酸左氧氟沙星[J]. 硅酸盐学报, 2012,40(12):1796-1801.
[23]	吕洋. pH值对光催化降解水中苯酚和氯酚的影响[D]. 深圳:哈尔滨工业大学, 2008.
[24]	Lee W L, Huang S T, Chang J L, et al. Photodegradation of CV over nanocrystalline bismuth tungstate prepared by hydrothermal synthesis[J]. Journal of Molecular Catalysis A:Chemical, 2012,361-362:80-90.
[25]	Liu T T, Wang L, Lu X, et al. Comparative study of the photocatalytic performance for the degradation of different dyes by ZnIn2S4:adsorption, active species, and pathways[J]. RSC Adv., 2017,7:12292-12300.
[26]	Nakamura K J, Ide Y, Ogawa M. Molecular Recognitive Photocatalytic Decomposition on Mesoporous Silica Coated TiO2 particle[J]. Materials Letters, 2011,65(1):24-26.
[27]	李晓金.氧化钛和钨酸铋光催化有机物降解活性的改进及机理研究[D]. 杭州:浙江大学, 2015.
[28]	Chaudhari P, Chaudhari V, Mishra S. Low temperature synthesis of mixed phase titania nanoparticles with high yield, its mechanism and enhanced photoactivity[J]. Materials Research, 2016,19(2):446-450.
[29]	Sheng J Y, Li X J, Xu Y M. Generation of H2O2 and OH radicals onBi2WO6 for phenol degradation under visible light[J]. ACS Catal, 2014,4:732-737.
[30]	Ma?gorzata P, Mohamed S, Polonca T. Photocatalytic degradation of cholesterol-lowering statin drugs by TiO2-basedcatalyst. Kinetics, analytical studies and toxicity evaluation[J]. J. Photochem. Photobiol. A:Chemistry, 2010,213:61-69.