The authors tested hydrodynamic and acoustic cavitation in a reactor to leach tungsten from scheelite concentrate in sodium hydroxide at 40 to 80 C, aiming to cut energy use relative to autoclave processing. Recovery of tungsten as tungsten trioxide reached 71.5% with acoustic cavitation versus 36.7% without ultrasound. The paper concerns ore processing.
Key numbers
This paper reports no numerical findings relevant to tungsten exposure.
Methods (brief)
Leaching experiments in an optimized cavitation reactor with dual-frequency excitation and different orifice plates, compared with conventional chemical leaching.
Evidence fitness
Off-topic for dietary exposure: a mineral processing paper that does not support dietary exposure or toxicity claims for tungsten.
Limitations
Process efficiency only; no environmental or biological measurements.
Related evidence
Update history
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