• 0 Posts
  • 25 Comments
Joined 2 months ago
cake
Cake day: December 24th, 2025

help-circle

  • https://www.science.org/doi/full/10.1126/science.aam8743 It really does work better than refrigeration or zeolite based systems.

    Here’s some of the discussion in the article:

    Two-thirds of the world’s population is experiencing water shortages (1). The water in the form of vapor and droplets in the atmosphere, estimated to be about 13 thousand trillion liters (2), is a natural resource that could address the global water problem. Although there has been interest in dewing (3–6) from moist air and fog capture (7–9), these processes require either the frequent presence of 100% relative humidity (RH) or a large amount of energy and thus are not viable solutions for the capture of water from air. Ideally, a water-harvesting system should operate with a material that can take up and release water with minimum energy requirements and that is powered by low-grade energy sources, such as sunlight, in order to potentially allow its deployment in households, especially those located in sunny regions. Here, we demonstrate water harvesting by vapor adsorption using a porous metal-organic framework {microcrystalline powder form of MOF-801, [Zr6O4(OH)4(fumarate)6]} (10) in ambient air with low RH typical of the levels found in most dry regions of the world (down to a RH of 20%). We also report a device based on this MOF that can harvest and deliver water (2.8 liters of water per kilogram of MOF per day at 20% RH) under a nonconcentrated solar flux less than 1 sun (1 kW m–2), requiring no additional power input for producing water at ambient temperature outdoors. Porous materials, such as zeolites, silica gels, and MOFs, can harvest water from air by adsorption over a wide range of humidity values (11–13). However, conventional adsorbents (e.g., zeolites and silica gels) suffer from either low uptake of water or requiring high energy consumption to release water. Although MOFs have already been considered in numerous applications—including gas storage, separation, and catalysis (14–16); heat pumps (17, 18); and dehumidification (19)—the use of MOFs for water harvesting has only recently been proposed (10). The flexibility (20–22) with which MOFs can be made and modified at the molecular level, coupled with their ultrahigh porosity, makes them ideally suited for overcoming the challenges mentioned above.


  • This is a bit more serious than the old, frequently-debunked “dehumidifier in the desert” stuff, because it doesn’t depend on cooling the air to get the water out, but using a molecular sponge. If you pump enough air over that, you’ll eventually fill it up, and you can drive the water out by heating it up.

    The guy behind this is a serious organic chemist, and his Nobel prize was actually for pioneering and developing these molecules, so it’s not a case of “Nobel prize winner does daft stuff about a subject he’s not an expert in”, either.

    I’m still reserving judgement on whether this will be economically sensible, but I’m not dismissing it immediately, either.






  • The apps have been very kind to me.

    On Tinder, I met my GF from 2017 to 2022. We had a lot in common, had some really great times, but the long-distance thing in the end was too much, so when she suggested opening up the relationship, I went back on the apps, and after an open relationship phase, we decided to shift from a romantic relationship to friendship. We’re still good friends, though - I saw her last Thursday when she was in my city.

    During our open phase, I met some lovely people (two on Bumble, one on tinder) who for one reason or another weren’t open to a committed relationship, but there was no harm done - we spent good time together and drifted naturally apart once I started a relationship that turned monogamous. No hard feelings on either side.

    On Tinder I also met my current (forever) partner. Amazing, low-conflict relationship. We live together and I’ve kind of stepped into the dad role for her son. We met in December 2021, chatted for three months and then started seeing each other, and soon became exclusive. I get along brilliantly with her parents, as does she with mine. We’re absolutely sure that we’re together for life.

    I never felt that the apps were leading me into cheap, disposable relationships. I never had issues of “What if the next perfect person is just one swipe away?”