Why isn't the replace function working - Pandas

Question

I am trying to remove special characters from a string, but when I export the Pandas dataframe as a CSV, I can still see the special characters.

Does anyone know why that is?

Current Code:

document = json.dumps(jfile,default=str)
document2 = document.replace('£','').replace('$','').replace('™','').replace('€','')

document2  = json.loads(document2)
document2.to_csv("test.csv", index = False)