Enhanced Phosphate Removal by Nanosized Hydrated La(III) Oxide

Jan 5, 2016 - Enhanced Phosphate Removal by Nanosized Hydrated La(III) Oxide Confined in Cross-linked Polystyrene Networks. Yanyang Zhang, Bingcai ...
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Enhanced Phosphate Removal by Nanosized Hydrated La(III) Oxide Confined in Crosslinked Polystyrene Networks Yanyang Zhang, Bingcai Pan, Chao Shan, and Xiang Gao

Environmental Science & Technology is published by the American Chemical Society. 1155 Sixteenth Street N.W., Washington, DC 20036 Published by American Chemical Society. Copyright © American Chemical Society. However, no copyright claim is made to original U.S. Government works, or works produced by employees of any Commonwealth realm Crown government in the course of their duties.

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Environ. Sci. Technol., Just Accepted Manuscript • DOI: 10.1021/acs.est.5b04630 • Publication Date (Web): 05 Jan 2016 Downloaded from http://pubs.acs.org on January 11, 2016

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Environmental Science & Technology is published by the American Chemical Society. 1155 Sixteenth Street N.W., Washington, DC 20036 Published by American Chemical Society. Copyright © American Chemical Society. However, no copyright claim is made to original U.S. Government works, or works produced by employees of any Commonwealth realm Crown government in the course of their duties.

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Environmental Science & Technology is published by the American Chemical Society. 1155 Sixteenth Street N.W., Washington, DC 20036 Published by American Chemical Society. Copyright © American Chemical Society. However, no copyright claim is made to original U.S. Government works, or works produced by employees of any Commonwealth realm Crown government in the course of their duties.

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Environmental Science & Technology is published by the American Chemical Society. 1155 Sixteenth Street N.W., Washington, DC 20036 Published by American Chemical Society. Copyright © American Chemical Society. However, no copyright claim is made to original U.S. Government works, or works produced by employees of any Commonwealth realm Crown government in the course of their duties.

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Environmental Science & Technology

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Environmental Science & Technology

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Enhanced Phosphate Removal by Nanosized Hydrated La(III) Oxide

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Confined in Crosslinked Polystyrene Networks

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Yanyang Zhang, Bingcai Pan*, Chao Shan, Xiang Gao

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State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment,

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Nanjing University, Nanjing 210023, China

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*To whom correspondence should be addressed

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E-mail: [email protected] (B. Pan)

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Tel: +86-25-8968-0390

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Environmental Science & Technology

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ABSTRACT

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A new nanocomposite adsorbent La-201 of extremely high capacity and specific

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affinity towards phosphate was fabricated and well characterized, where hydrated

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La(III) oxide (HLO) nanoclusters were immobilized inside the networking pores of

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the polystyrene anion exchanger D-201. La-201 exhibited enhanced phosphate

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adsorption in the presence of competing anions (chloride, sulfate, nitrate, bicarbonate

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and silicate) at greater levels (up to molar ratio of 20), with working capacity 2-4

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times higher than a commercial Fe(III) oxide-based nanocomposite HFO-201 in batch

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runs. Column adsorption runs by using La-201 could effectively treat ~6500 bed

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volumes (BV) of a synthetic feeding solution before breakthrough occurred (from 2.5

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mg P/L in influent to