Direct Ocean Capture

Direct ocean capture (DOC) is a form of abiotic marine carbon dioxide removal (mCDR).

DOC involves the capture and removal of dissolved CO2 directly from seawater using electrochemical treatments, which can include electrolysis or electrodialysis. Under these treatments, an acidic solution is applied to seawater, converting bicarbonate to CO2, which can be subsequently stripped from the ocean water using membranes and vacuum pumps. The end products of DOC include CO2 gas and CO2-depleted seawater.  

This method is in the research stage currently, and is not yet implemented at scale as a climate solution.