I want to propose that if you haven't already, you need to become acquainted with the use of ACTIVATED CHARCOAL (and regular charcoal). Charcoal is an adsorbant. No, I didn't misspell the word. Charcoal doesn't absorb; it adsorbs. Technically, that means that it causes a substance to form on its surface, as opposed to absorb, which means to soak up or to take it up. What does charcoal adsorb?