摘要:The adsorption properties of heavy metal Pb2+in wastewater were studied by adding bentonite(BT)to peanuts shell biochar (BC) with pyrolysis temper-ature of 250°C.Compared with BC,the removal ef-fect of modified biochar (BBC) was slightly better.By adding BT,the surface area was larger and thefuinctional group of BBC was increased.Adsorptionprocess of Pb2was fitted by the Langmuir model,the adsorption kinetic was better described by thePseudo-Second order model.It means that BBC ad-sorpt Pb2 mainly by chemisorption.According tothe results of the Langmuir model,the max imum ad-sorption capacity (qm) of BBC was 32.154 mg/g.Theresults of this study can provide a theoretical basisfor its practical application in industrial wastewatertreatment.