As an ex-smoker, I certainly thought that there must be some use for used cigarette filters DayzofSpeed. Unfortunately, or maybe fortunately, I have yet to find anything that I could use a filter for except as a cigarette filter. Mine quit being used when I gave up smoking, the same day I went into surgery for my neck cancer.
Please consider joining the ranks of the former smokers before it catches up with you. I can well remember how much I hated former smokers who had a holier than thou attitude but you would do much for yourself if you found a way to ditch that addiction habit . I got past it using the trans-dermal nicotine patches, since I was chemically addicted. Other people have had success with other methods. BTW I am a 9 year cancer survivor.
Now that we have that rant behind us, it would take an enormous number of those filters to be effective as a filter for anything much more than what they were meant to filter.