| Title |
From nickel waste solution to hydrogen storage alloys - An excellent example of circular economy implementation |
| ID_Doc |
5327 |
| Authors |
Baraniak, M; Staszak, K; Kruszelnicka, I; Ginter-Kramarczyk, D; Góra, W; Lota, G; Regel-Rosocka, M |
| Title |
From nickel waste solution to hydrogen storage alloys - An excellent example of circular economy implementation |
| Year |
2024 |
| Published |
|
| DOI |
10.1016/j.seppur.2023.125063 |
| Abstract |
In light of the need to protect the environment from hazardous heavy metals, waste management is becoming not just a proposal but a necessity for the reduction of wastewater toxicity and, additionally, a value-added substitute for processes of extracting raw materials from primary sources. This article demonstrates the feasibility of using critical and hazardous element as Ni(II) from industrial nickel waste solutions to produce hydrogen storage alloys (HSA), perfectly fulfilling the circular economy assumptions. The hydrometallurgical process proposed for the preparation of the Ni-containing electrolyte (NiE) from the waste solution included the following stages: diffusion dialysis, Cr(III) and Al(III) hydroxide precipitation, extraction to separate Co(II) from Ni(II), and the organic phase regeneration by Co(II) stripping with dialysate. The raffinate after extraction performed as NiE (-10-15 g/ dm(3) Ni(II), 0.1 g/dm(3) Co(II)) for the preparation of HSA. However, to improve the quality of Ni deposit on NiCo foam or steel plates, NiE should be modified with an ammonia solution (to pH -12). A better voltammetric characteristic of the modified electrodes (25-30 percentage points higher peaks resulting from NaBH4 electrooxidation), compared to those unmodified was reported. It was proven that the electroactive materials obtained showed high catalytic performance for the borohydride oxidation reaction. |
| Author Keywords |
Hazardous waste management; Nickel deposition; Borohydride electrooxidation; Hydrometallurgical process; Sustainable development; Electroactive materials for hydrogen storage |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:001145445000001 |
| WoS Category |
Engineering, Chemical |
| Research Area |
Engineering |
| PDF |
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