If a blood cell is placed into a solution of 10m salt (highly salty) what would you expect to occur?

The blood cell will lose water and will undergo lysis.

Cell membrane is permeable to water and can get/lose water via osmosis. Osmosis is induced by the gradient of concentration of the solution. In this case, the 10M salt solution has a very high oncotic pressure that it will attract nearby water. That means the water inside the cells will be taken into the solution and cell will continue to shrink and then die.

Long term continuous groundwater monitoring, especially with warning systems and anthropic activity monitors