Based on the screening of hydroxyiron oxide(HFO)as a superior arsenic-removing adsorbent,iron oxyhydroxide-calcium alginate composite beads(IACB)were prepared via embedding.On the basis of influence factor experiments,kinetic experiments,and thermodynamic experiments,continuous flow experiments were conducted to predict the As breakthrough curve,explore the dynamic adsorption capacity of the material,and analyze the dynamic adsorption kinetics through mathematical model fitting.Under three different influent flow rates(1.5,2.0,and 2.5 mL/min),the Thomas model predicted that the equilibrium dynamic adsorption capacities of IACB for arsenic in mine water were 13.876,15.810,and 12.712 mg/g,respectively.The Yoon-Nelson model predicted that the times corresponding to the 50%breakthrough point were 91,78,and 67 days,respectively.The fitting results of the Adams-Bohart model indicated that the adsorption removal rate was not proportional to the remaining capacity of the adsorbent and the concentration of the adsorbate.Furthermore,the reaction mechanism between IACB and arsenic in mine water during the continuous flow experiments was revealed through characterization analysis.Studies demonstrated that the static or continuous flow adsorption performance of IACB was superior to that of materials such as activated alumina,modified sepiolite,and modified activated carbon.IACB not only solves the defects of HFO in practical application but also possesses the advantages of high dynamic adsorption capacity and long-term service life,thereby exhibiting good application prospects in the field of mine water arsenic pollution control.