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The effect of pH, nitrate, iron (III) and bicarbonate on photodegradation of oxytetracycline in aqueous solution
Li, Chanjuan1; Zhang, Dahai1; Peng, Jialin2; Li, Xianguo1
2018-04-01
发表期刊JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
ISSN1010-6030
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
DOI10.1016/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
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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.
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