| Issue |
MATEC Web Conf.
Volume 333, 2021
The 18th Asian Pacific Confederation of Chemical Engineering Congress (APCChE 2019)
|
|
|---|---|---|
| Article Number | 11010 | |
| Number of page(s) | 5 | |
| Section | Materials Processing and Interface Control | |
| DOI | https://doi.org/10.1051/matecconf/202133311010 | |
| Published online | 08 January 2021 | |
Recovery of Phosphorus from Waste Solution of Electroless Nickel-Phosphorus Plating
Department of Chemical Engineering and Materials Science, Graduate School of Engineering, University of Hyogo, Shosha 2167, Himeji, Hyogo 671-2280, Japan
* Corresponding author: tyamamot@eng.u-hyogo.ac.jp
We attempted to recover phosphorus species from a waste plating solution of electroless nickel-phosphorus plating. With the aim of increasing the recovery yield by oxidizing phosphite to phosphate efficiently, we examined ozonation of a model plating solution by supplying ozonecontaining oxygen gas to the solution employing an aerated mixing vessel. As a result of the measurements of the transient changes in the concentrations of the phosphorus species and dissolved ozone in the solution, we confirmed the effect of the organic additives contained in the plating solution on the ozonation efficiency. Calcium chloride was subsequently added to the ozone-treated solution to precipitate the phosphate as calcium hydrogen phosphate, which was poorly soluble to water. At this moment, the recovery yield of the phosphorus from the model waste plating solution was greater than 86%.
© The Authors, published by EDP Sciences, 2021
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