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Effect of humic acid on ciprofloxacin removal by magnetic multifunctional resins
Background organic matter significantly influences the removal of emerging contaminants in natural water. In this work, the adsorption of ciprofloxacin (CPX) onto a series of magnetic multifunctional resins (GMA10-GMA90) in the presence and absence of humic acid (HA) was conducted to demonstrate the...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4964575/ https://www.ncbi.nlm.nih.gov/pubmed/27464502 http://dx.doi.org/10.1038/srep30331 |
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author | Wang, Wei Cheng, Jiade Jin, Jing Zhou, Qing Ma, Yan Zhao, Qingqing Li, Aimin |
author_facet | Wang, Wei Cheng, Jiade Jin, Jing Zhou, Qing Ma, Yan Zhao, Qingqing Li, Aimin |
author_sort | Wang, Wei |
collection | PubMed |
description | Background organic matter significantly influences the removal of emerging contaminants in natural water. In this work, the adsorption of ciprofloxacin (CPX) onto a series of magnetic multifunctional resins (GMA10-GMA90) in the presence and absence of humic acid (HA) was conducted to demonstrate the effect of HA. Both hydrophobic and ion exchange interactions contributed to CPX adsorption. Negative charge-assisted hydrogen bonds also participated in the adsorption process, resulting in the high adsorption amount of anionic CPX onto the negatively charged GMA30 under basic solutions. HA could impact CPX adsorption not only as a competitive adsorbate but also as an additional adsorbent. At pH 5.6, the additional adsorption sites provided by adsorbed HA molecules on the resins dominated and thus facilitated the adsorption process. While at pH 10, HA inhibited the adsorption of CPX by directly competing for ion exchange sites and coexisting with CPX in the solution. The ratio of the amount of CPX adsorbed by dissolved HA to that by the resin reached as high as 1.61 for GMA90. The adsorbed HA molecules onto the resins could provide additional adsorption sites for CPX as proven by the enhanced CPX adsorption in HA-preloading systems at pH 5.6. |
format | Online Article Text |
id | pubmed-4964575 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-49645752016-08-08 Effect of humic acid on ciprofloxacin removal by magnetic multifunctional resins Wang, Wei Cheng, Jiade Jin, Jing Zhou, Qing Ma, Yan Zhao, Qingqing Li, Aimin Sci Rep Article Background organic matter significantly influences the removal of emerging contaminants in natural water. In this work, the adsorption of ciprofloxacin (CPX) onto a series of magnetic multifunctional resins (GMA10-GMA90) in the presence and absence of humic acid (HA) was conducted to demonstrate the effect of HA. Both hydrophobic and ion exchange interactions contributed to CPX adsorption. Negative charge-assisted hydrogen bonds also participated in the adsorption process, resulting in the high adsorption amount of anionic CPX onto the negatively charged GMA30 under basic solutions. HA could impact CPX adsorption not only as a competitive adsorbate but also as an additional adsorbent. At pH 5.6, the additional adsorption sites provided by adsorbed HA molecules on the resins dominated and thus facilitated the adsorption process. While at pH 10, HA inhibited the adsorption of CPX by directly competing for ion exchange sites and coexisting with CPX in the solution. The ratio of the amount of CPX adsorbed by dissolved HA to that by the resin reached as high as 1.61 for GMA90. The adsorbed HA molecules onto the resins could provide additional adsorption sites for CPX as proven by the enhanced CPX adsorption in HA-preloading systems at pH 5.6. Nature Publishing Group 2016-07-28 /pmc/articles/PMC4964575/ /pubmed/27464502 http://dx.doi.org/10.1038/srep30331 Text en Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Wang, Wei Cheng, Jiade Jin, Jing Zhou, Qing Ma, Yan Zhao, Qingqing Li, Aimin Effect of humic acid on ciprofloxacin removal by magnetic multifunctional resins |
title | Effect of humic acid on ciprofloxacin removal by magnetic multifunctional resins |
title_full | Effect of humic acid on ciprofloxacin removal by magnetic multifunctional resins |
title_fullStr | Effect of humic acid on ciprofloxacin removal by magnetic multifunctional resins |
title_full_unstemmed | Effect of humic acid on ciprofloxacin removal by magnetic multifunctional resins |
title_short | Effect of humic acid on ciprofloxacin removal by magnetic multifunctional resins |
title_sort | effect of humic acid on ciprofloxacin removal by magnetic multifunctional resins |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4964575/ https://www.ncbi.nlm.nih.gov/pubmed/27464502 http://dx.doi.org/10.1038/srep30331 |
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