Adsorption-desorption of oxytetracycline on marine sediments: Kinetics and influencing factors

doi:10.1016/j.chemosphere.2016.08.100

	Adsorption-desorption of oxytetracycline on marine sediments: Kinetics and influencing factors
	Li, J; Zhang, H; Zhang, H (reprint author), Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Peoples R China. Email:hzhang@yic.ac.cn
发表期刊	CHEMOSPHERE
ISSN	0045-6535
	2016-12-01
卷号	164 页码:156-163
关键词	Oxytetracycline Adsorption Desorption Kinetics Influencing Factors Stirred Flow Chamber
DOI	10.1016/j.chemosphere.2016.08.100
产权排序	[Li, Jia; Zhang, Hua] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Peoples R China; [Li, Jia] Univ Chinese Acad Sci, Beijing, Peoples R China
作者部门	中科院海岸带环境过程与生态修复重点实验室
英文摘要	To reveal the kinetics and mechanisms of antibiotic adsorption/desorption processes, batch and stirred flow chamber (SFC) experiments were carried out with oxytetracycline (OTC) on two marine sediments. The OTC adsorption capacities of the marine sediments were relatively weak and related to their organic carbon (OC) and contents of fine particles. Sorption isotherms of OTC on marine sediment can be well described by both the Langmuir and Freundlich models. Langmuir adsorption maxima (q(max)) and Freundlich distribution coefficients (K-f) increased with the decrease of salinity and pH, which indicated the importance of variable charged sites on sediment surfaces. A second order kinetic model successfully described adsorption and desorption kinetics of OTC and well reproduced the concentration change during stop-flow. The adsorption kinetic rates (k(a)) for OTC under different experimental conditions ranged from 2.00 x 10(-4) to 1.97 x 10(-3) L (mg min)(-1). Results of SFC experiments indicated that diffusive mass transfer was the dominant mechanism of the time-dependent adsorption of OTC and its release from marine sediment was mildly hysteretic. The high desorption percentage (43-75% for LZB and 58 -75% for BHB) implied that binding strength of OTC on two marine sediments was weak. In conclusion, marine sediment characteristics and environmental factors such as salinity, pH, and flow rate are critical factors determine extent of OTC sorption on marine sediment and need to be incorporated in modeling fate and transport of OTC in marine environment. (C) 2016 Elsevier Ltd. All rights reserved.
文章类型	Article
资助机构	National Nature Science Foundation of China(41271506 ; National Natural Science Foundation of China(U1406403) ; National Natural Science Foundation of Shandong Province(U1406403) ; Key Research Program of the Chinese Academy of Sciences(KZZD-EW-14) ; 41230858)
收录类别	SCI
语种	英语
关键词[WOS]	NONEQUILIBRIUM SORPTION ; ANTIBIOTIC-RESISTANCE ; SOILS ; TETRACYCLINE ; BACTERIA ; PHARMACEUTICALS ; MOBILITY ; TYLOSIN ; COLUMN ; MODEL
研究领域[WOS]	Environmental Sciences & Ecology
WOS记录号	WOS:000385318200020
引用统计	被引频次：56[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/17459
专题	中国科学院海岸带环境过程与生态修复重点实验室中国科学院海岸带环境过程与生态修复重点实验室_污染过程与控制实验室
通讯作者	Zhang, H (reprint author), Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Peoples R China. Email:hzhang@yic.ac.cn
推荐引用方式 GB/T 7714	Li, J,Zhang, H,Zhang, H . Adsorption-desorption of oxytetracycline on marine sediments: Kinetics and influencing factors[J]. CHEMOSPHERE,2016,164:156-163.
APA	Li, J,Zhang, H,&Zhang, H .(2016).Adsorption-desorption of oxytetracycline on marine sediments: Kinetics and influencing factors.CHEMOSPHERE,164,156-163.
MLA	Li, J,et al."Adsorption-desorption of oxytetracycline on marine sediments: Kinetics and influencing factors".CHEMOSPHERE 164(2016):156-163.

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