The belt has this squeaking noise coming from it and i found a little antifreeze on the ground under the engine

if there was a coolant leak then the squeak is more than likely the water pump hence the leak, a belt coming off would'nt cause a coolant leak on its own ,i'd get the water pump checked

check for play in the distributor sometimes the slop will make the pick up window under the cap will hit the distributor cap , the squeaking noise may be your belt or tensioner pulley bearing the knock can also come from a bad tensioner as well .

it is your belt it needs to be replace you can buy belt dressing spray to use but if you have lot of miles I would replace the belt good luck..

are you sure its not your fan belts? because if fan belts are not turning, it means that the engine is off. check if the tension in your fan belts are still ok. if not, have it re tensioned. if noise is still present, have it changed.

You should have your belts checked for proper tension. If they're squeaking when the engine is at a low RPM then they are most likely loose and need to be tightened. However, that squeak may also be an indication that one of the tensioners in the belt's line may be wearing down. If that is the case the tensioner will need to be replaced since the bearing inside is worn down beyond the point where lubrication would be useful.

With the engine turned off, put your finger up behind under the pump pulley. if you find antifreeze there likely the pump seal has failed. Otherwise, locate the leak source and make whatever repair is necessary. You will get a noise any time water or coolant gets on the drive belt. Best to look before going through a pump replacement to find later you have a pin hole in the radiator on a hose!!!

With the engine off, try using a soapy solution using dishwashing liquid, and rag to clean the belt and pulleys. Antifreeze is very slippery and sticks to surfaces. Clean it the best you can, and also tighten the belt slightly.

Replace the belt and take a look at the pulley while belt is off, 90% of the time the squeak is caused by the belt.

I would replace the faulty waterpump and belt asap you could cause major engine damage by overheating it . the squealing is either caused by the belt slipping from having antifreeze on it or the water pump may have totally locked up .

take off your serp-belt and spin your water pump, alternator, idler pully and see what squeaks or feels rough. your water pump bearings may be bad. the only thing you can do is change it. dont forget to change your thermostat and antifreeze. FYI your antifreeze is made with lubricants in it for your water pump bearings.