After injecting the oxygen scavenger to the sea water (like aqueous solution of sodium bisulphite), it will react and absorb the dissolved oxygen in the water. Now if we dump the water back to the sea, what would be the environmental impact??
Sodium bisulfite will oxidize to sodium sulfate. Sulfates are far more stable than sulfites, and unless they precipitate, they will hang in solution forever. You have to determine the amount of sulfates you're generating; if it's a liter of a lab solution of a low concentration, it makes no difference to the environment, in the sense it basically is a form of a brine, but if you dump a cubic mile of industrial wastewater with sulfate in it (as the ones originating from petroleum manufacturing), then of course there is a problem. It's a question of how much.
may this link help you :
https://www.bakeryonline.com/doc/an-overview-of-oxygen-scavenging-packaging-an-0002
regards
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