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. 2018 Feb 7;6:17. doi: 10.3389/fchem.2018.00017

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Copyright © 2018 Wu, Tang, Li, Liu, Li, Chen and Xue.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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(A) The relation of removal efficiency of CPX to the pH values of Fe-MCM-41 at 298 K (The dotted lines represented the fraction of cationic, zwitterionic, and anionic forms of CPX), (B) the leaching of Fe content at different pH-value.