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. 2018 Sep 19;10(9):1038. doi: 10.3390/polym10091038

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© 2018 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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SEM images of nanosponges (NS) after a repeated number of cycles (a,b). Percentage of 4-chlorophenoxyacetic acid (4-CPA) adsorbed after a repeated number of cycles.