Ultrasound enhanced electrochemical oxidation of Alizarin Red S on boron doped diamond(BDD) anode:Effect of degradation process parameters
Ultrasound enhanced electrochemical oxidation of Alizarin Red S on boron doped diamond(BDD) anode:Effect of degradation process parameters
复制标题
硼掺杂金刚石（BDD）阳极上超声波增强茜素红S电化学氧化：降解过程参数的影响
DOI：
10.1016/j.chemosphere.2018.06.137
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发表时间：
2018
期刊：
影响因子：
8.8
通讯作者：
Zhou Kechao
中科院分区：
文献类型：
--
作者：
Zhu Chengwu;Jiang Chuqi;Chen Shou;Mei Ruiqiong;Wang Xin;Cao Jun;Ma Li;Zhou Bo;Wei Qiuping;Ouyang Guangqi;Yu Zhiming;Zhou Kechao
Textile wastewater is characterized by high toxicity, complex structure, and resistance to biodegradation. Therefore, advanced oxidation technologies have received extensive attention. However, it is usually difficult to achieve a desired degradation effect using a single technology. The combination of various advanced oxidation technologies is an important way to achieve efficient degradation of organic wastewater. The present investigation was focused on ultrasound enhanced electrochemical oxidation (US-EO) of typical anthracene Alizarin Red S dye on a boron doped diamond anode. Our work indicates that ultrasonic oxidation technology which is mainly based on cavitation, can produce strongly oxidizing active substances such as radical dotOH, radical dotHO2, radical dotO, and H2O2, that accelerate the destruction of the dye molecular structure and achieve dye decolorization and mineralization. The effects on cavitation and decomposition of ARS by the parameters that affect degradation, including solution temperature, initial pH, and electrolytes, were examined. Results show that low temperature was more conducive to ultrasonic cavitation in the US-EO process; the degradation efficiency rate of EO was higher than that of US-EO when the solution temperature was above 45 °C. Ultrasonic cavitation was significantly more efficient in acid than in alkaline conditions. Almost 100% color removal and 86.07% COD removal was achieved for 100 mg L−1ARS concentration with a 0.05 M Na2SO4electrolyte, temperature of 30 °C and pH of 4.97 after 3 h. GC-MS analysis showed that the intermediate products of ARS in the US-EO process were phthalic anhydride, PEAs and bisphenol A, which is eventually mineralized to CO2and H2O.
