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| Study on electrochemical heterogeneous catalytic ozonation process for treatment of amantadine pharmaceutical wastewater |
| MA Fu-jun1, LI Xin-yang1, ZONG Bo-yang2, YU Xiao-hua1, SUN Shao-bin1, YAO Hong1 |
1. School of Civil Engineering and Architecture, Beijing Jiaotong University, Beijing 100044, China;
2. College of Environmental Science and Engineering, Tongji University, Shanghai 314051, China |
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Abstract Electrochemical heterogeneous catalytic ozonation (E-catazone) process was studied for treating amantadine wastewater, which was of high COD, high salinity and nonbiodegradable. The amantadine removal efficiency of E-catazone process was compared with catalytic ozonation (Catazone) and electrochemical oxidation (EO) processes, Besides, the effects of current density, pH and ozone concentration on the amahadine treatment efficiency were further investigated to obtain optimized experimental conditions. Electro-catalytic ozonation obtained 62% of the COD removal efficiency and 44% removal of TOC under pH 12.5, current density 15mA/cm2, O3 flow rate 0.4L/min and O3 concentration 60mg/L, The performance was significantly better than that of Catazone (COD 44%, TOC 29%) and EO (COD 13%, TOC 17%), E-catazone process demonstrated strong oxidizing power and fast oxidation rate, and the pseudo-first order of COD removal rate constant k was 1.81times and 8.22times of Catazone and EO, More importantly, the E-catazone could improve the biochemical properties of wastewater efficiently and rapidly, and increased by about two order of magnitude. The results showed that the E-catazone was a potential advanced oxidation technology, which could realize high efficiency, fast removal of organic pollutants and improve the biodegradability of wastewater.
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Received: 19 March 2018
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