采用连续进水模式电容去离子技术（CDI）进行除氟研究，探讨了原水质量浓度、电压、流速、pH、共存离子、离子交换膜对除氟的影响，通过动力学分析探讨了其去除机理，并考察了电极的再生性能。结果表明，在原水质量浓度为50 mg/L、电压为1.5 V、流速为7 mL/min的条件下，电极吸附量可以达到3.17 mg/g。原水质量浓度越高、电压越大，电极的吸附量就越高。撤去电压电极即可高效再生，5次循环后，电极吸附能力可保持86%。离子交换膜可有效减弱pH波动，提高电极再生性能，但吸附量降低。连续进水模式下CDI除氟过程遵循准一级动力学模型，吸附速率与剩余电容成正比。

Single pass mode capacitive deionization (CDI) is employed to remove fluorides.The effects of feed water concentration,voltage,flow rates,pH,coexisting ions and ion exchange membrane on removal of fluorides are discussed.The removal mechanism is discussed through kinetic analysis,and the regeneration performance of the electrode is investigated.The results show that the adsorption capacity can reach 3.17 mg·g^-1 when the fluorides concentration in feed water is 50 mg·L^-1,voltage is 1.5 V and the flow rate of feed water is 7 mL·min^-1.The higher the fluoride concentration in feed water and the voltage,the higher the specific adsorption capacity of the electrode.After 5 cycles,the adsorption capacity of the electrode can remain 86%.The ion exchange membrane can effectively reduce pH fluctuation and improve the regeneration performance of electrode,but the adsorption capacity is therefore reduced.CDI fluoride removal process in single pass mode follows a pseudo-first-order kinetic model,and the adsorption rate is proportional to the residual capacitance.

杨帆(1996-),男,硕士研究生,研究方向为水处理与能源资源化,752867602@qq.com