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

doi:10.1016/j.jphotochem.2018.01.004

QIBEBT-IR

	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
	2018-04-01
发表期刊	JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
ISSN	1010-6030
卷号	356 页码:239-247
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.
文章类型	Article
关键词	Oxytetracycline Photodegradation Ph Comprehensive Effect Simulated Sunlight
WOS标题词	Science & Technology ; Physical Sciences
DOI	10.1016/j.jphotochem.2018.01.004
关键词[WOS]	SIMULATED SUNLIGHT IRRADIATION ; PHOTOCATALYTIC DEGRADATION ; DIRECT PHOTOLYSIS ; NATURAL-WATERS ; UV-IRRADIATION ; SOLAR LIGHT ; ANTIBIOTICS ; KINETICS ; MECHANISM ; TOXICITY
收录类别	SCI
语种	英语
WOS研究方向	Chemistry
项目资助者	National Natural Science Foundation of China(41276067) ; Fundamental Research Funds for the Central Universities of Ocean University of China(201762006 ; 201762030)
WOS类目	Chemistry, Physical
WOS记录号	WOS:000428972800025
出版者	ELSEVIER SCIENCE SA
引用统计
文献类型	期刊论文
条目标识符	http://ir.qibebt.ac.cn/handle/337004/10726
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.