Song Xiang, Zhao Hui, Fang Keneng, Lou Yongshan, Liu Zongkui, Liu Chifeng, Ren Zhandong, Zhou Xiaorong, Fang Hua, Zhu Yuchan
School of Chemical and Environmental Engineering, Wuhan Polytechnic University Wuhan 430023 P. R. China
RSC Adv. 2019 Jan 22;9(6):3113-3119. doi: 10.1039/c8ra08929a.
Electrolyzed oxidizing water (EOW) can be divided into acidic electrolyzed oxidizing water (AEOW) and slightly acidic electrolyzed water (SAEW). AEOW has the characteristics of low pH (pH < 2.7) and high oxidation-reduction potential (ORP > 1100 mV). SAEW is slightly acidic (pH = 5-6) and has an ORP of 700-900 mV. AEOW and SAEW both have a certain amount of active chlorine content (ACC), so they have the characteristics of broad spectrum, rapidity and high efficiency of sterilization. At present, there is little systematic research on AEOW and SAEW preparation. However, it is very important to study the preparation process, including electrode material and electrolytic process. First, the effects of Pt electrodes with different thermal decomposition temperatures on AEOW's pH, ORP and ACC values were investigated in detail. Next, for the SAEW preparation, the process is based on the preparation of AEOW by ion-exchange membrane electrolysis, reasonably mixing the electrolyzed cathode and anode solution. The effects of technological conditions such as electrolysis time, current density and electrolyte concentration have been systematically studied, and it is expected to get SAEW with a pH value slightly less than 7, a higher ORP value and a certain amount of ACC.
电解氧化水（EOW）可分为酸性电解氧化水（AEOW）和微酸性电解水（SAEW）。酸性电解氧化水具有低pH值（pH < 2.7）和高氧化还原电位（ORP > 1100 mV）的特点。微酸性电解水呈弱酸性（pH = 5 - 6），氧化还原电位为700 - 900 mV。酸性电解氧化水和微酸性电解水都含有一定量的有效氯含量（ACC），因此它们具有杀菌广谱、快速和高效的特点。目前，关于酸性电解氧化水和微酸性电解水制备的系统研究较少。然而，研究其制备过程，包括电极材料和电解过程非常重要。首先，详细研究了不同热分解温度的铂电极对酸性电解氧化水的pH值、氧化还原电位和有效氯含量值的影响。其次，对于微酸性电解水的制备，该过程基于通过离子交换膜电解制备酸性电解氧化水，合理混合电解后的阴极和阳极溶液。系统研究了电解时间、电流密度和电解质浓度等工艺条件的影响，期望得到pH值略小于7、氧化还原电位较高且含有一定量有效氯含量的微酸性电解水。
