3 ms·
If ball milling works, why wouldn't ultrasound (Knock the PFAS into components using ultrasound)? Both are in essence physical methods (as opposed to chemical m
by giardini 3y ago
If ball milling works, why wouldn't ultrasound (Knock the PFAS into components using ultrasound)? Both are in essence physical methods (as opposed to chemical methods).
- gumby 3y agoI assume the ball milling stirs the material (and probably heats it up) exposing lots of surface area to interaction with the balls. I'd guess ultrasound would be blocked/absorbed by the material it hits first. But I'm not a physicist, just my first thoughts.
- rapatel0 3y agoI'd speculate that ball milling transfers significantly higher force at higher intensity then ultrasound can.
- mensetmanusman 3y agoBall milling exposes surfaces to fresh reactive radicals introduced through tribo-electric effects. Ultrasonics just vibrates and could be combined with ball milling to improve mixing rates, but without physical friction, it probably won’t be as effected.
- giardini 3y agoIn the process described they're using metal balls - so there won't be any electric effects. The metal balls immediately conduct electrons to negate any charge imbalance. You're thinking of non-metal balls, used for other processes, e.g. https://www.sciencedirect.com/science/article/abs/pii/S221128552200622X https://www.sciencedirect.com/science/article/abs/pii/S22112...