镍基碳纳米管膜电极的制备和废水氨回收效能研究OA

Aiming at the key problems of low recovery efficiency and high energy consumption of chemical ammonia re-covery technology from ammonia nitrogen waste water,a high-efficiency membrane electrode for ammonia re-covery by electrochemical method was prepared.The membrane electrode was a two-dimensional layered structure composed of polytetrafluoroethylene(PTFE)membrane,carbon nanotube(CNT)layer and hydro-philic nickel layer deposited on the CNT layer.SEM,XRD,XPS and LSV curves showed that the nickel layer significantly enhanced the ammonia recovery performance.The experimental results showed that when the ini-tial ammonia nitrogen mass concentration was 500 mg/L,the membrane electrode achieved 81.78%ammonia nitrogen removal rate and 72.43%ammonia recovery rate within 300 min,and the average ammonia flux was 1.45 g NH3-N/(m2·h-1).