Journal of Geoscience and Eco Agricultural Studies

Abstract

This study presents a subsea extraction concept for dissolved hydrogen sulfide based on a trigger-activated, buoyancy-controlled mechanism. Unlike conventional systems that rely on continuous pumping, the proposed approach utilizes hydrostatic pressure, phase transition, and density variation to enable self-sustained upward transport. At depth, hydrogen sulfide remains dissolved under high pressure conditions. Upon ascent, pressure reduction induces rapid gas release, generating an effervescent multiphase flow that decreases fluid density and promotes buoyancy-driven motion. The system operates as a mobile subsea platform with controlled buoyancy, allowing positioning at selected depths without fixed infrastructure. Following a minimal external initiation, the extraction process becomes self-sustained through intrinsic physical gradients. The concept suggests a low-energy alternative to traditional subsea extraction methods and provides a framework for accessing dissolved gas reservoirs in anoxic water bodies.