Removal of remazol black B textile dye from aqueous solution by adsorption

► The PW and AC-PW are good adsorbents to remove RB dye from aqueous solutions. ► AC-PW is an activated carbon prepared from the Brazilian-pine fruit shell. ► PW is the unmodiffied Brazillian pine fruit shell. ► PW maximum sorption capacity was 74.6 mg g-1. ► AC-PW maximum sorption capacity was 446.2 mg g-1. ► AC-PW adsorbent removed 94% of the mixture of dyes in a synthetic dye effluent.