Tu Yong, Chen Yong, Zhang Xiaoyue, Xu Yunhao, Zhang Yixuan, Cui Tao, Fu Boming
Key Laboratory of Environmental Remediation and Ecological Health, Ministry of Industry and Information Technology, Jiangsu Environmental Engineering Technology Co. Ltd, Jiangsu Environmental Protection Group Co., Ltd, Nanjing 210019, China; School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu Province, China.
Key Laboratory of Environmental Remediation and Ecological Health, Ministry of Industry and Information Technology, Jiangsu Environmental Engineering Technology Co. Ltd, Jiangsu Environmental Protection Group Co., Ltd, Nanjing 210019, China E-mail:
Water Sci Technol. 2025 Mar;91(5):639-653. doi: 10.2166/wst.2025.021. Epub 2025 Feb 15.
A novel integration of the electrochemical process with electrodialysis and electro-oxidation (IEDEO) was designed for the effective pretreatment of chlorpyrifos manufacturing wastewater, with high concentrations of both salts and organic compounds. The effects of operating parameters including initial pH and constant voltage on the IEDEO process performance were investigated. The IEDEO process showed excellent performance for the simultaneous removal of bio-refractory organics and inorganics in the chlorpyrifos wastewater. In contrast with the single EO process, the results of energy consumption, UV-vis spectra, and GC-MS showed that the oxidation performance for chlorpyrifos wastewater by IEDEO was carried out more efficiently. The biodegradability of the chlorpyrifos wastewater pretreated by IEDEO was significantly improved. The total salt removal (90.3 ± 2.1%) from the chlorpyrifos wastewater obtained by IEDEO was significantly higher than the 5.8 ± 1.6% removal attained with the EO process. The COD removal of chlorpyrifos wastewater by the IEDEO process was 25.5 ± 1.2%, and the energy consumption of the IEDEO process was 15.1 ± 1.6 kWh kg COD at 2 h, representing a 60-65% reduction compared to the EO process. This indicated that the IEDEO process was a valuable pretreatment technique for biological treatment. Moreover, scanning electron microscopy and X-ray diffraction results demonstrated that the IEDEO concentrate was beneficial for subsequent evaporative desalination.
设计了一种将电化学过程与电渗析和电氧化相结合的新型工艺（IEDEO），用于有效预处理含有高浓度盐和有机化合物的毒死蜱生产废水。研究了初始pH值和恒定电压等操作参数对IEDEO工艺性能的影响。IEDEO工艺在同时去除毒死蜱废水中的生物难降解有机物和无机物方面表现出优异的性能。与单一电氧化工艺相比，能耗、紫外可见光谱和气相色谱-质谱结果表明，IEDEO对毒死蜱废水的氧化性能更高效。经IEDEO预处理的毒死蜱废水的生物降解性显著提高。IEDEO工艺对毒死蜱废水的总盐去除率为（90.3±2.1）%，明显高于电氧化工艺的（5.8±1.6）%。IEDEO工艺对毒死蜱废水的化学需氧量去除率为25.5±1.2%，在2小时内IEDEO工艺的能耗为15.1±1.6 kWh/kg化学需氧量，与电氧化工艺相比降低了60-65%。这表明IEDEO工艺是一种有价值的生物处理预处理技术。此外，扫描电子显微镜和X射线衍射结果表明，IEDEO浓缩物有利于后续的蒸发脱盐。
