Tiny Bubbles Unlock a Powerful New Source of Blue Energy

"A new approach to blue energy tackles one of the field’s most persistent problems: how to move ions quickly without sacrificing selectivity.

Where rivers meet the sea, nature constantly mixes freshwater and saltwater. That blending releases energy, and osmotic energy, often called blue energy, aims to turn that overlooked resource into electricity.

The basic idea is straightforward: saltwater contains lots of dissolved ions, and freshwater contains far fewer. If you place an ion-selective membrane between the two, ions naturally migrate toward the lower salt concentration, and that controlled movement generates a voltage that can be captured." https://scitechdaily.com/tiny-bubbles-unlock-a-powerful-new-source-of-blue-energy/