Adsorption-desorption of oxytetracycline on marine sediments: Kinetics and influencing factors
文献类型：期刊论文
| 作者 | Li, J ; Zhang, H
|
| 刊名 | CHEMOSPHERE
 |
| 出版日期 | 2016-12-01 |
| 卷号 | 164页码:156-163 |
| 关键词 | Oxytetracycline Adsorption Desorption Kinetics Influencing factors Stirred flow chamber |
| ISSN号 | 0045-6535 |
| 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 |
| 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 |
| 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. |
| 研究领域[WOS] | Environmental Sciences & Ecology |
| 关键词[WOS] | NONEQUILIBRIUM SORPTION ; ANTIBIOTIC-RESISTANCE ; SOILS ; TETRACYCLINE ; BACTERIA ; PHARMACEUTICALS ; MOBILITY ; TYLOSIN ; COLUMN ; MODEL |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000385318200020 |
| 源URL | [http://ir.yic.ac.cn/handle/133337/17459]  |
| 专题 | 烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室 烟台海岸带研究所_污染过程与控制实验室 |
| 推荐引用方式 GB/T 7714 | Li, J,Zhang, H. Adsorption-desorption of oxytetracycline on marine sediments: Kinetics and influencing factors[J]. CHEMOSPHERE,2016,164:156-163. |
| APA | Li, J,&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. |
入库方式： OAI收割
来源：烟台海岸带研究所
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