Continuous organic synthesis in water around micro-orifices after flows

Area of Science:

• Biochemistry
• Physical Chemistry
• Geochemistry

Background:

• Micro-orifice water flow is significant across biology, medicine, chemistry, and engineering.
• Previous research indicated organic matter generation within micro-orifices from dissolved CO2 and N2 via hydroxyl radicals.
• The origin of this organic synthesis mechanism remained localized to the orifice itself.

Purpose of the Study:

• To investigate if organic material synthesis extends beyond micro-orifices into the surrounding water.
• To quantify organic synthesis by measuring water volume decrease.
• To characterize the synthesized organic compounds.

Main Methods:

• Ultrapure water with dissolved air was flowed through a micro-orifice.
• After flow cessation, water volume decrease was monitored for over 100 hours.
• Residue from evaporated surrounding water was analyzed using Raman and infrared spectroscopy.

Main Results:

• A gradual and substantial decrease in water volume was observed.
• Spectroscopic analysis revealed organic matter, including carotenoids, amides, esters, and sugars, in the water surrounding the orifice.
• The identified organic compounds were similar to those previously found within the micro-orifice.

Conclusions:

• Organic matter synthesis occurs in a broad region of water around micro-orifices, not just within them.
• These findings have implications for understanding the origins of life and biological processes.
• The research may contribute to CO2 reduction technologies and other scientific/engineering applications.