1. Jiangxi Provincial Key Laboratory of River Source Water Ecological Protection, Jiangxi University of Science and Technology, Ganzhou 341000, China
2. National-local Joint Engineering Laboratory for Water Engineering Safety and Resource Efficient Utilization in Poyang Lake Basin, Jiangxi University of Water Resources and Electric Power, Nanchang 330099, China
Using cowbone powder as biomass raw material,MgCl2 and FeCl3 as modifiers,Mg-Fe oxides modified biochar (MFBC) is prepared via co-precipitation and co-pyrolysis methods,and applied to remove Pb2+ from aqueous solution efficiently.The prepared MFBC is characterized by using SEM,FT-IR,XRD and XPS,and the influences of different experimental factors on its performance in the adsorption of Pb2+ are analyzed through batch adsorption experiments.The adsorption characteristics of Pb2+ by MFBC is explored through adsorption kinetics model and isothermal adsorption model.It is found that the adsorption process fits well with the pseudo-second-order kinetic equation and Langmuir model,and is dominated by monolayer chemisorption.The adsorption mechanism of MFBC for Pb2+ mainly include surface complexation,cation-π bonding,ion exchange,and coprecipitation.In conclusion,MFBC prepared from waste bone resources is a promising and efficient adsorbent that can be used for the remediation of heavy metals contaminated water bodies.
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