三维电极处理氨氮废水的电化学反应特性

摘要

Electrode particle string, which has no short-circuited current, was used as the filling material of three-dimensional electrode to better reveal the characteristics of electrochemical reaction. The results revealed that the removal of ammonia during electrochemical reaction involved two steps: before 80min, it was mainly caused by the electrochemical oxidation reaction between ammonia and hydroxyl radicals generated at the cathode particle electrode;after 80min, small amount of normalized reactions provided synergy effect to achieve better removal rate. Experimental results also showed an improvement of ammonia removal rate with the increase in cell voltage. The highest removal rate was achieved under pH 10 with the voltage of 25V.%采用无短路电流的电极粒子串作为三维电极的填充材料,以更好地揭示其电化学反应特性。研究证实在电化学反应过程中涉及到两个阶段,80min 前氨氮的去除机理主要是与在粒子电极阴极端产生的羟基自由基发生电氧化反应,80min 后少量的中归反应起到协同作用,从而达到更佳的去除效果。实验结果还说明随着槽电压的增大,氨氮去除率不断增大；当电压为25V,pH值为10的情况下得到较大的去除率。