三维电极法电解处理靛红模拟染料废水

Electrolytic Treatment of Isatin in Simulated Wastewater Using a Three-dimensional Electrode Reactor

在不锈钢电解电极之间充填由纱网包裹的柱状活性炭,在电场作用下,活性炭表面因静电感应带电,形成一系列粒子电极构成三维电极电解槽,将其用于电化学氧化含靛红的模拟染料废水,与二维电极电解槽相比,三维电极电解槽的面体比大大增加,粒子间距减小,物质传质效率大为改善,因此电流效率明显提高.同时试验了粒子电极填充方式、电流密度、Fe2+离子浓度、盐浓度对氧化脱色效率的影响.

A model dye wastewater of Isatin was treated by a three-dimensional electrode reactor equipped with granular activated carbon as particle electrode and stainless steel electrodes as the anode and cathode. Under the influence of an electric field with an appropriate voltage, activated carbon particles can be polarized to form charged microelectrodes. In comparison to the two-dimensional electrode reactor, the three-dimensional method offers the advantages of higher area-volume-ratio, shorter transfer distance between the reactant and the elec trode. Hence, the current efficiency for electrolytic treatment of wastewater is improved. In this paper, the influ ence of the way to prepare particle electrode, current density, concentration of Fe2＋ and salt on the color remov- al efficiency was investigated.