Common wicker,the raw material of biochar,was treated by hexadecyltrimethylammonium chloride (CTMAC) for cationic surface activation,and then it was mixed with zero?valent iron and sodium alginate to prepare zero?valent iron/cationic surfactant/biochar (Fe⁰?MBC) gel microspheres, and their ability to adsorb Cr(VI) in water was discussed.The structure and properties of Fe⁰?MBC gel microspheres were studied by means of XRF,FTIR,XRD and Zeta potential.Upon the analysis of the effects of the reaction time,temperature and pH value on adsorption,the adsorption mechanism was preliminarily discussed on the basis of adsorption kinetics and the isotherm model.The results indicate that the adsorption effect of Fe⁰?MBC gel microspheres on Cr(VI) is highly fitted with that of pseudo?first?order kinetics and the Langmuir isothermal adsorption model. The removal rates of Cr(VI) by CTMAC?activated biochar loaded with 5% zero?valent iron and CTMAC?activated biochar loaded with 10% zero?valent iron can reach 89% and 97% (initial Cr concentration of 100 mg/L) at 2 h, respectively, and the maximum saturated adsorption capacities are 33.777 9 mg/g and 42.562 0 mg/g, respectively.The experimental results reveal that Fe⁰?MBC gel microspheres, as a low?cost and high?efficiency environmental functional material, have good application prospects for the removal of Cr(VI) in wastewater.