The influence of acid demineralization on surface characteristics of black carbon and its sorption for pentachlorophenol

► The acid demineralization has different effect on various BC of different origins. ► It changed rice straw BC's surface characteristics and increased its PCP sorption. ► But it has little influence on the fly ash BC and soot BC. ► It was caused by the change of surface area, pore volume, and acidic functional group.