I had a look around past forum items regarding unprintable characters and emoji. I also had a look at the various regex nodes and string replacement nodes to see if I could find a solution that way, but I didn’t. No doubt somebody else will comment if they know of a good solution.
In the meantime, I have created a workflow using the java snippet node (you would need to modify the java snippet to use your chosen input column name and output column name, but I have put comments in the code at those places). The workflow has 3 different (but similar) snippets using a variety of regex and methods that I found on StackOverflow, so see if any of these work for you. They may or may not each filter out enough/too much.
Hopefully it will be of assistance until somebody suggests a simpler solution. It’s possible that the other nodes I tried can be made to work, but that I was just getting the regex wrong.