电吸附-电氧化耦合技术去除微污染水中氨氮的研究  

Removal of ammoniacal nitrogen from slightly-polluted water by electric adsorption-electric oxidation coupling technology

作　　者：王晓铄 潘涌璋 WANG Xiao-shuo;PAN Yong-zhang(School of Environment,Jinan University,Guangzhou 511443,China)

机构地区：[1]暨南大学环境学院,广东广州511443

出　　处：《现代化工》2022年第12期203-209,共7页Modern Chemical Industry

基　　金：2019年度国家级大学生创新创业训练计划项目(201910559058);广州市科技计划项目(201903010031)。

摘　　要：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TiO_(2)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, TiO_(2)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 TiO_(2)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.

关 键 词：活性炭纤维改性电极 电吸附 电氧化 氨氮 微污染水 

分 类 号：X52[环境科学与工程—环境工程]