版权说明 帮助中心
首页 > 成果 > 详情

Kinetics and mechanism investigation on the destruction of oxytetracycline by UV-254 nm activation of persulfate

ESI高被引SCI-EEIMedline
WOS被引频次:58
认领
导出
Link by DOI
反馈
分享
QQ微信 微博
成果类型:
期刊论文
作者:
Liu, Yiqing;He, Xuexiang;Fu, Yongsheng;Dionysiou, Dionysios D
通讯作者:
Dionysiou, Dionysios D.
作者机构:
[Fu, Yongsheng; Liu, Yiqing] Southwest Jiaotong Univ, Fac Geosci & Environm Engn, Chengdu 611756, Peoples R China.
[He, Xuexiang; Dionysiou, Dionysios D; Liu, Yiqing] Univ Cincinnati, Environm Engn & Sci Program, Cincinnati, OH 45221 USA.
通讯机构:
[Dionysiou, Dionysios D.] Univ Cincinnati, Environm Engn & Sci Program, Cincinnati, OH 45221 USA.
语种:
英文
关键词:
Mechanism;Oxytetracycline;Persulfate;Sulfate radical;UV-254 nm
期刊:
Journal of Hazardous Materials
ISSN:
0304-3894
年:
2016
卷:
305
页码:
229-239
文献类别:
WOS:Article;EI:Journal article (JA)
所属学科:
ESI学科类别:工程学;WOS学科类别:Engineering, Environmental;Environmental Sciences
入藏号:
WOS:000369451400026;EI:20155001671404
基金类别:
Cyprus Research Promotion Foundation - Republic of Cyprus; European Regional Development Fund of EU [NEA IPODOMI/STRATH/0308/09]; China Scholarship Council (CSC) Scholarship [201307000035]
机构署名:
本校为第一机构
院系归属:
地球科学与环境工程学院
摘要:
Oxytetracycline (OTC), an important broad-spectrum antibiotic, has been detected extensively in various environmental systems, which may have a detrimental impact on ecosystem and human health through the development of drug resistant bacteria and pathogens. In this study, the degradation of OTC was evaluated by UV-254nm activated persulfate (PS). The observed UV fluence based pseudo first-order rate constant (k<inf>obs</inf>) was found to be the highest at near neutral pH conditions (pH 5.5-8.5). Presence of various natural water constituents had different effects on OTC degradation, with a significant enhancement in the presence of bicarbonate or Cu<sup>2+</sup>. Limited elimination of total organic carbon (TOC) and PS was observed during the mineralization of OTC. Transformation byproducts in the presence and absence of hydroxyl radical scavenging agent tert-butanol (t-BuOH) were identified using ultra-high definition accurate-mass quadrupole time-of-flight liquid chromatography/mass spectrometer (LC-QTOF/MS). Potential OTC degradation mechanism was subsequently proposed revealing four different reaction pathways by SO<inf>4</inf><sup>-</sup>reaction including hydroxylation (+16Da), demethylation (-14Da), decarbonylation (-28Da) and dehydration (-18Da). This study suggests that UV-254nm/PS is a promising treatment technology for the control of water pollution caused by emerging contaminants such as OTC. &copy;2015 Elsevier B.V.
参考文献:
Anipsitakis GP, 2003, ENVIRON SCI TECHNOL, V37, P4790, DOI 10.1021/es0263792
Anipsitakis GP, 2004, ENVIRON SCI TECHNOL, V38, P3705, DOI 10.1021/es035121o
Antoniou MG, 2010, ENVIRON SCI TECHNOL, V44, P7238, DOI 10.1021/es1000243
Antoniou MG, 2010, APPL CATAL B-ENVIRON, V96, P290, DOI 10.1016/j.apcatb.2010.02.013
Auerbach EA, 2007, WATER RES, V41, P1143, DOI 10.1016/j.watres.2006.11.045

反馈

验证码:
看不清楚,换一个
确定
取消

成果认领

标题:
用户 作者 通讯作者
请选择
请选择
确定
取消

提示

该栏目需要登录且有访问权限才可以访问

如果您有访问权限,请直接 登录访问

如果您没有访问权限,请联系管理员申请开通

管理员联系邮箱:yun@hnwdkj.com