环境工程学报2017，Vol.11Issue(8)：4789-4796,8.DOI:10.12030/j.cjee.201606040
活性碳纤维电极电吸附去除乙酸
Removal of acetic acid by electro adsorption with activated carbon fiber electrodes
摘要
Abstract
Acetic acid is an important metabolic compound produced during anaerobic digestion of organic wastes for hydrogen production.Removal of acetic acid is of great significance for eliminating product inhibition and improving hydrogen productivity.In this paper, for the first time, electro-sorption technology was applied to remove acetic acid, and its feasibility was explored.Using activated carbon fiber as the electrode material, the effects of voltage, electrode distance, flow rate, and initial concentration were studied for the electro adsorption removal of acetic acid.The isotherm and kinetics characteristics of this process were analyzed.The results showed that at voltage of 0.9 V, plate spacing 1 cm, and flow rate 21.5 mL · min-1;the pH of an acetic acid solution at a concentration of 1.75 mmol · L-1, was raised from pH 3.73 to the optimum range 4.5 to 5.5 favored by hydrogen-producing bacteria.The removal rate reached ＞ 95％.It is feasible to prevent the accumulation of acetic acid through electro adsorption, and the isothermal adsorption process fit well with the Freundlich formula (i.e., the adsorption process is in compliance with the first-order kinetic equation).These results are significantly meaningful for optimizing the process of hydrogen production through anaerobic digestion.关键词
电吸附/活性碳纤维/乙酸/吸附等温线/吸附动力学Key words
electro-adsorption/activated carbon fiber/acetic acid/adsorption isotherm/adsorption kinetics分类
资源环境引用本文复制引用
王甜甜,赵春玲,张倩茹,张晴,孙桦,党光耀,侯超..活性碳纤维电极电吸附去除乙酸[J].环境工程学报,2017,11(8):4789-4796,8.基金项目
国家自然科学基金资助项目(21501130) （21501130）
国家大学生创新计划项目(20150439051) （20150439051）
泰安市科技发展计划项目(2015GX2039) （2015GX2039）
