The effect of pH, nitrate, iron (III) and bicarbonate on photodegradation of oxytetracycline in aqueous solution

doi:10.1016/j.jphotochem.2018.01.004

	The effect of pH, nitrate, iron (III) and bicarbonate on photodegradation of oxytetracycline in aqueous solution
	Li, Chanjuan 1; Zhang, Dahai 1; Peng, Jialin 2; Li, Xianguo 1
刊名	JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
	2018-04-01
卷号	356 页码:239-247
关键词	Oxytetracycline Photodegradation Ph Comprehensive Effect Simulated Sunlight
ISSN号	1010-6030
DOI	10.1016/j.jphotochem.2018.01.004
文献子类	Article
英文摘要	Photodegradation is a very important elimination pathway of Oxytetracycline (OTC) in aquatic environments. The photochemical behavior of OTC in absence/presence of nitrate, iron (III) and bicarbonate, especially their combinations, was systematically studied in aqueous solution by employing a Suntest-CPS+ sunlight simulator in this work. Meanwhile, the effect of solution pH (4.8-9.1) and irradiation intensity (250-500 W/m(2)) on the removal efficiency of OTC have also been assessed. The results showed that OTC degradation followed a pseudo-first-order kinetics in most conditions except for irradiation in neutral/alkaline solutions and in presence of NO3-, where a two-step pseudo-first-order kinetics was obeyed. OTC degradation was highly pH-dependent and increased significantly with increasing pH. The presence of NO3- and HCO3- promoted the photochemical loss of OTC in aqueous solution by generating hydroxyl radicals and adjusting solution pH, respectively; whereas iron (Ill) was found to play a negative role under the conditions studied. The influence of NO3- coupled with Fe3+ was not a simple additive effect and the overall performance was to inhibit OTC degradation. In addition, combination of HCO3- and NO3- exhibited an antagonistic effect. Results from irradiation in co-presence of NO3-, Fe3+ and HCO3- suggested that direct photolysis of OTC was much more efficient than its indirect photolysis. These results provide a meaningful reference for understanding the fate and transformation of OTC in natural water systems. (C) 2018 Elsevier B.V. All rights reserved.
WOS关键词	SIMULATED SUNLIGHT IRRADIATION ; PHOTOCATALYTIC DEGRADATION ; DIRECT PHOTOLYSIS ; NATURAL-WATERS ; UV-IRRADIATION ; SOLAR LIGHT ; ANTIBIOTICS ; KINETICS ; MECHANISM ; TOXICITY
WOS研究方向	Chemistry
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000428972800025
资助机构	National Natural Science Foundation of China(41276067) ; Fundamental Research Funds for the Central Universities of Ocean University of China(201762006 ; 201762030)
内容类型	期刊论文
源URL	[http://ir.qibebt.ac.cn/handle/337004/10725]
专题	中国科学院青岛生物能源与过程研究所
通讯作者	Li, Xianguo
作者单位	1.Ocean Univ China, Key Lab Marine Chem Theory & Technol, Minist Educ, Qingdao 266100, Peoples R China 2.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao 266101, Peoples R China
推荐引用方式 GB/T 7714	Li, Chanjuan,Zhang, Dahai,Peng, Jialin,et al. The effect of pH, nitrate, iron (III) and bicarbonate on photodegradation of oxytetracycline in aqueous solution[J]. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY,2018,356:239-247.
APA	Li, Chanjuan,Zhang, Dahai,Peng, Jialin,&Li, Xianguo.(2018).The effect of pH, nitrate, iron (III) and bicarbonate on photodegradation of oxytetracycline in aqueous solution.JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY,356,239-247.
MLA	Li, Chanjuan,et al."The effect of pH, nitrate, iron (III) and bicarbonate on photodegradation of oxytetracycline in aqueous solution".JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY 356(2018):239-247.