6533b824fe1ef96bd12816b9
RESEARCH PRODUCT
Precipitation of potassium as hazenite from washing water of spent alkaline batteries
Suvi LapinkangasLasse RautioToni KauppinenTao HuJanne PesonenUlla Lassisubject
hazenitesaostusparistotblack massfosfaatitfosforilannoitteetGeneral Chemical EngineeringGeneral ChemistrystruviteprecipitationfertilizerIndustrial and Manufacturing Engineeringalkaline batterykiertotalousmineraalitEnvironmental Chemistrysähkö- ja elektroniikkaromudescription
Hazenite (KNaMg2(PO4)2 × 14 H2O), a new type of struvite mineral, was precipitated from the potassium-rich washing water of spent alkaline battery black mass. Hazenite can be used as a fertilizer, which would be an additional benefit derived from the sustainable recovery of battery materials. Precipitation experiments were performed using different pH values (9.5–12), Mg:K:PO4 ratios ((1.0–1.5):1:(1.0–1.5)) and temperatures (10–40 °C). Based on the results, hazenite precipitated in a wide pH range under alkaline conditions. The precipitation kinetics were fast, and the purity of the hazenite was high. Overall, hazenite can be precipitated at room temperature without the addition of excess chemicals, which minimizes the consumption of chemicals and energy. peerReviewed
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2022-11-01 |