Polymer Pre-treatment for Magnesium Electrode: Effects on Electrochemical Phosphate Recovery
Water-insoluble magnesium phosphate species, possibly magnesium ammonium phosphates (MAPs), are precipitated during the electrolysis of magnesium in aqueous solutions containing ammonium and phosphate ions. Electrolysis and subsequent precipitation have examined for magnesium electrode with pre-trea...
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| Format: | Article |
| Language: | English |
| Published: |
The Electrochemical Society of Japan
2025-02-01
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| Series: | Electrochemistry |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/electrochemistry/93/2/93_24-00110/_html/-char/en |
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| Summary: | Water-insoluble magnesium phosphate species, possibly magnesium ammonium phosphates (MAPs), are precipitated during the electrolysis of magnesium in aqueous solutions containing ammonium and phosphate ions. Electrolysis and subsequent precipitation have examined for magnesium electrode with pre-treatments, immersion in various biodegradable polymer solutions. Electrolysis at the constant potential of −1.4 V vs. Ag/AgCl occurs on magnesium electrodes in a phosphate-containing solution, providing precipitate on the magnesium electrode, consisting mainly of MAPs. The precipitate mass appears to be related linearly to the integrated charge, irrespective of the pre-treatment used. Pre-treatment of magnesium electrodes in poly(ethylene glycol) (PEG) and poly(vinyl alcohol) (PVA) exerted markedly negative and positive influences, respectively, on the electrolysis and the yield of the precipitate during electrolysis, attributable to changes in the interfacial resistance or surface morphology. |
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| ISSN: | 2186-2451 |