hydrothermal vent chimney Archives

Comparison of precipitate membranes following either fluorescein or methyl orange dye flow. (a) and (b) show two separate precipitate membranes following injection of (a) 10-4 M and (b) 2.5×10-4 M fluorescein for 20 h at a pump rate of 0.10 mL/h per syringe. Examples of large, embedded structures observed in various precipitate membranes following methyl orange dye flow are shown in (c-f). (c) and (e) are optical micrographs taken at different locations along the same membrane after injection of 10-4 M methyl orange for 20 h at a pump rate of 0.10 mL/h per syringe. (d) and (f) represent two different precipitate membranes after injection of 2.5×10-4 M methyl orange for 20 h at a pump rate of 0.10 mL/h per syringe. Scale bars: 250 μm in (a-d); 50 μm in (e) and (f). -- chemrxiv

Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Biophysics, Biosignatures & Paleobiology, ROVs/Submersibles/Diving, Sample Return, Status Report, Water/Hycean Worlds & Oceanography

Charge-Selective Adsorption Of Organic Molecules In Microfluidic Mg(OH)2 Precipitate Membranes

by Keith CowingMay 27, 2026May 27, 2026

The porous mineral structures of alkaline hydrothermal vent chimneys have been proposed as natural concentrators of dissolved organic molecules, potentially addressing the longstanding dilution problem in deep-sea origin-of-life hypotheses.

hydrothermal vent chimney

Charge-Selective Adsorption Of Organic Molecules In Microfluidic Mg(OH)2 Precipitate Membranes

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