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. 2016 Apr 22;11:217. doi: 10.1186/s11671-016-1434-5

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© Ge et al. 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 3 — Purification performance of the nanoparticles towards oilfield wastewater. Photographs of deionized water, oilfield wastewater before and after treated with a Fe₃O₄@SiO₂-MPS-AM-DMC-AMPS and c Fe₃O₄ under external magnet field, respectively, and the corresponding desalination efficiency of b Fe₃O₄@SiO₂-MPS-AM-DMC-AMPS and d Fe₃O₄ for each ion