You're still ignoring the fact that there is an absolutely unfathomably insane amount of water on the planet.
The world's largest pump (according to a quick search) can pump 60,000 liters per second. The oceans contain over 1.3 billion cubic kilometers of water. One cubic kilometer is a trillion liters. It would take this pump - the largest pump in the world - 192 days to move one cubic kilometer of water.
Let's be charitable and say we can make a noticeable dent in ocean CO2 if we could only process 1% of the ocean's water per year. That's about 13 million cubic kilometers. Let's be generous and say one of these pumps can do 2 cubic kilometers a year even though it's a bit less. So we'd need 7.5 million of these pumps - and of course we'd also need each of them to be connected to a facility that's capable of processing all the water as quickly as the pump can supply it.
This is the problem with carbon capture. We can't build many/large enough capture facilities to make a difference.
The world's largest pump (according to a quick search) can pump 60,000 liters per second. The oceans contain over 1.3 billion cubic kilometers of water. One cubic kilometer is a trillion liters. It would take this pump - the largest pump in the world - 192 days to move one cubic kilometer of water.
Let's be charitable and say we can make a noticeable dent in ocean CO2 if we could only process 1% of the ocean's water per year. That's about 13 million cubic kilometers. Let's be generous and say one of these pumps can do 2 cubic kilometers a year even though it's a bit less. So we'd need 7.5 million of these pumps - and of course we'd also need each of them to be connected to a facility that's capable of processing all the water as quickly as the pump can supply it.
This is the problem with carbon capture. We can't build many/large enough capture facilities to make a difference.