Mechanism of Electro-Coagulation with Al/Fe Periodically Reversing Treating Berberine Pharmaceutical Wastewater

2017 International Conference on Environmental and Energy Engineering

生态环境科学;能源学

Sun, Zhaonan^1 ; Liu, Zheng^2 ; Hu, Xiaomin^3

Department of Chemical and Material Engineering, Yingkou Institute of Technology, Yingk, China^1

State Grid Liaoning Maintenance Company, Yingkou, China^2

College of Resources and Civil Engineering, Northeastern University, Shenyang, China^3

关键词: COD removal efficiency;    Electro coagulations;    ELectrochemical methods;    Electrolyte concentration;    Laboratory conditions;    Pharmaceutical wastewater;    Structure activity relationships;    UV visible absorption spectrum;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/63/1/012026/pdf
DOI  :  10.1088/1755-1315/63/1/012026

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The method of treating pharmaceutical wastewater by electro-coagulation with Al/Fe periodically reversing (ECPR) was proposed based on traditional electrochemical method. The principle of ECPR was generalized. Mechanism of ECPR to treat berberine pharmaceutical wastewater was investigated. Treatability and mechanism studies were conducted under laboratory conditions. For berberine wastewater (800 mg/L), decolourization efficiency and COD removal efficiency were highest to 98% and 95% respectively when voltage was 8V, reaction time was 60 min, alternating period was 10 S electrolyte concentration was 0.015 mol/L, stirring speed was 750 rpm, pH value was 3-10 and distance between two plates was 0.6 cm. For removal berberine, flocculation, floatation and oxidation provided 73%, 8% and 18% removal efficiency, which can be inferred by analysing UV-visible absorption spectrum, acidification experiment, EDTA shielding experiment, structure-activity relationship, oxidation and floatation. Meanwhile decolourization and COD removal conformed to apparent pseudo-first order and zero-order kinetics for 200mg/L and 400-1000 mg/L berberine wastewater respectively.