To lessen the environmental impact of humans living on the Seastead or also improve the air quality if neighboring countries are not good stewards of the environment in regards to the air I have an idea that is inexpensive and may be useful to you all.
Air Filter Machine Design:
A vessel filled halfway up with water with an orifice or multiple orifices aligned below to waterline. These orifices have tubes connected to them which curve upward outside of the vessel and connect to a pan which is above the water level that is in the shape of a ring that wraps around the vessel. In that pan sits crushed zeolite stone. Inside the vessel in the water sits crushed zeolite stone as well. A fan motor sits on top of the vessel and draws air up through the water. The fan would have to be enclosed in on top the vessel to create vacuum pressure to draw air from outside the vessel and through the crushed zeolite, through the tubes and water. The fan would also have to be water proofed to prevent water from making contact with electrical parts.
If you’ve ever seen or used a tobacco water pipe it works almost the same way but the zeolite is in the ‘pipe’ and water. And no flame of course lol.
Why is such a air filtration device needed?
Filters are expensive and with this you just dump out the zeolite and water into the proper environmental friendly disposal area.