Clays from the Bafang region (West Cameroon): Properties and potential application as decolorizing agent of river water

► Characterization of a magnetite-rich clay from the Bafang region (West Cameroon). ► Verification of its non-toxicity in case of therapeutic use. ► Application in the discolouration of a dense humid forest ecosystem river waters. ► Adsorption of humid substances on the clay by hydroxyl groups.