Chapter 4 - Summary of research on biochar adsorption of chemical pollutants

Ash leachate pretreatment

Making potash lye from wood ashes and rainwater (image adapted from The Encyclopedia of Country Living, by Carla Emery).

People have been making their own homemade “potash lye” solutions – often used in soap making – for ages by soaking wood ashes in rainwater. Ash leachate is generally a high pH (pH 10-12) solution of mainly KOH, containing other AAEMs …