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Elaborately Design of Polymeric Nanocomposite with Mg(II)- buffering Nanochannels for Highly Efficient and Selective Heavy Metal Removal from Water: Case Study for Cu(II)

Abstract

Nanostructured metal oxide bearing composites are new-generation materials for the removal of various heavy metals, however, they are inefficient when used in acidic solutions, because of poor stability, strong H+ competition and surface charge repulsion. To overcome these problems, we designed a new composite (Zr/Mg oxide-PS), which was synthesized by doping hybrid Mg and Zr oxides into negatively charged sulfonated polystyrene (PS) to extend the applicability of such composites to Cu(II) removal in acidic wastewaters. Three different modes of action are involved, The embedded Mg(II) oxide buffers changes to the internal solution environment in the nanopore region, hybrid nano-Zr(IV) oxide, together with Mg(II) species provide good Cu sorption, and the -SO3H immobilized on the matrix improves access to Cu(II). The obtained Zr/Mg oxide-PS has extensive applications to acidic Cu-contaminated waters and gives a selectivity of approximately 20 times greater than that of ZrO2-PS. For wastewater in application, an excellent adsorption capacity of 4650 kg wastewater per kg of sorbent was achieved, the effluent met World Health Organization drinking water standards and exhausted materials are readily regenerated and repeated uses for several cycles. The results suggest that this Mg-containing composite has potential applications in remediation of acidic heavy-metal-containing acidic wastewaters.

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Publication details

The article was received on 08 Jun 2018, accepted on 08 Sep 2018 and first published on 11 Sep 2018


Article type: Paper
DOI: 10.1039/C8EN00611C
Citation: Environ. Sci.: Nano, 2018, Accepted Manuscript
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    Elaborately Design of Polymeric Nanocomposite with Mg(II)- buffering Nanochannels for Highly Efficient and Selective Heavy Metal Removal from Water: Case Study for Cu(II)

    Q. Sun, Y. Yang, Z. Zhao, Q. Zhang, X. Zhao, G. Nie, T. Jiao and Q. Peng, Environ. Sci.: Nano, 2018, Accepted Manuscript , DOI: 10.1039/C8EN00611C

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