通过沸石粉末、二氧化钛粉末、乙炔黑和碳纤维等材料构成的新型复合电极的电吸附-电氧化耦合技术去除微污染水中的氨氮。结果表明,当进水氨氮质量浓度为2.0 mg/L、pH调节为6.8、电吸附电压为1.2 V、吸附时间为1.5 h、电氧化电压为7.5 V、反应时间为1.5 h时,出水中氨氮质量浓度小于1.5 mg/L,表明添加TiO₂有助于提高活性炭纤维复合电极对氨氮的电吸附与电氧化效果。同时,Weber-Morris粒子内扩散模型和Langmuir等温线较好地拟合了复合电极的动力学吸附和等温吸附行为。

A novel composite electrode is constructed with zeolite powder,TiO₂ powder,acetylene black and carbon fiber,and used in a coupling technology between electric adsorption and electric oxidation for the removal of ammoniacal nitrogen in slightly-polluted water.The results indicate that the concentration of ammoniacal nitrogen in effluent is less than 1.5 mg·L^-1 when the concentration of ammoniacal nitrogen in influent is 2.0 mg·L^-1,pH is adjusted to 6.8,the electro adsorption voltage is 1.2 V,the adsorption time is 1.5 h,the electro oxidation voltage is 8 V,and the reaction time is 1.5 h.It is indicated that the addition of TiO₂ is beneficial to improve the composite electrode's electric adsorption and electric oxidation effect to ammoniacal nitrogen.Meanwhile,Weber-Morris intraparticle diffusion model and Langmuir isotherms successfully fit with the respective behaviors of the composite electrode.

王晓铄(1998-),女,本科生,研究方向为水处理技术,xshuowang@163.com