Acid-activated bentonite clay (or activated bleaching clay) is used as an effective filtration media. The clay is rich in carbon, and it has a low pH. This product is most commonly used as a scrub or bleaching clay during oil purification, distillation preparation, pesticide removal, and product improvement including odor removal and visual improvement.
 
Carbon Chemistry's T-41 is an acid activated bentonite clay containing approximately 10% carbon. T-41 has a low pH and removes colors and other impurities more aggressively than other media. When paired with Carbon Chemistry MagSil PR it is effective for pesticide remediation. T-41 bleaching clay is often used as a scrub prior to the distillation process.