Spectrum Analysis of Trace Hydrogen Peroxide in Electrochemical Process
LIU Qian3, CHEN Wen-juan1,2, JING Bo1,2, ZHANG Jian1,2, YANG Meng-ying3, CHEN Wu3, YIN Xian-qing1,3*
1. State Key Laboratory of Offshore Oil Exploitation, Beijing 100027，China
2. CNOOC Research Institute, Beijing 100027，China
3. College of Chemical and Environmental Engineering, Yangtze University, Jingzhou 434023, China
Abstract：Electrochemistry is an efficient, fast and green method for the COD removal of sewage. The electrochemical treatment process of sewage containing polymer in an oilfield produces some reactive intermediates such as H2O2 which can remove COD by indirect oxidation. It is very difficult to detect accurately and quantitatively with general methods because of the trace H2O2 in the process of electrochemistry. Thus, we need a method of high-sensitivity to measure the amount of H2O2 to guide the control process of electrochemical treatment; Ti and 5-Br-PADAP with H2O2 can form a stable colored ternary complex at pH 1~1.5, and there is an obvious absorption peak of this ternary color system at about 561 nm. Within the range of 02～10 μmol·L-1 H2O2 and sticking to Beer-Lambert Law, a method of spectrophotometry can be established for determination of trace reactive intermediates about H2O2 in the process of electrochemical treatment of sewage. The UV spectra of 5-Br-PADAP(B), binary complexes Ti(Ⅳ)-B and ternary complexes of Ti(Ⅳ)-B-H2O2 is studied and the determination method of trace H2O2 is proposed in this paper. Here are innovations of this paper: The factors of influencing the formation and stability of ternary complex system of Ti(Ⅳ)-B-H2O2 are the order of adding reagents, pH, the amount of anhydrous ethanol, heating temperature and time and the ratio and amount of Ti(Ⅳ)-B with UV spectroscopy. The experimental conditions for the accurate detection and quantification of trace H2O2 are obtained: pH 1.0~1.5, 50% of ethanol, heated in water bath at 50 ℃ about 20min, Ti(Ⅳ) and B solution mixed at the equal molar ratio, The order of adding reagents: 2 mL of various concentrations of these standards H2O2 solution, 3 mL of anhydrous alcohol, 1 mL of 0.32 mol·L-1 HCL, 2 mL of pH 1.5 HCl-KCl buffer solution, 2 mL of Ti(Ⅳ)-B solution to a 10 mL volumetric flask, and dilute with 0.32 mol·L-1 HCL solution to the mark line of volume. The method is easy, rapid, reproducible, cheap and high sensitive, and it obtains satisfying results in practical applications.
基金资助: the Open Fund of State Key Laboratory of Offshore Oil Exploitation (CCL2015RCPS0221RNN)，the National Science and Technology Major Project of China (2016ZX05025-003)
通讯作者:
尹先清
E-mail: jzyinxq@126.com
作者简介: LIU Qian, (1992—), female, Master’s degree, College of Chemistry and Environmental Engineering, Yangtze University
e-mail:
2465609314@qq.com
引用本文:
刘 倩，陈文娟，靖 波，张 健，杨梦颖，陈 武，尹先清. 电化学处理油田污水中微量H2O2的光谱分析[J]. 光谱学与光谱分析, 2017, 37(05): 1656-1660.
LIU Qian, CHEN Wen-juan, JING Bo, ZHANG Jian, YANG Meng-ying, CHEN Wu, YIN Xian-qing. Spectrum Analysis of Trace Hydrogen Peroxide in Electrochemical Process. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2017, 37(05): 1656-1660.
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