Adsorption of berberine on commercial minerals

►Sorption of organic modifiers on commercial clays may yield low-cost organoclays ►Interactions between berberine and four different commercial minerals are presented ►In three clay minerals the negative charge was reversed at high amounts of berberine ►Adsorption isotherm types can be related to the smectitic content in the minerals. ►Commercial organoclays might be efficiently used for wastewater pretreatment