College of Environmental Science and Engineering, Fujian Key Laboratory of Pollution Control & Resource Reuse, Fujian Normal University, Fuzhou, Fujian Province 350007, China.
College of Environmental Science and Engineering, Fujian Key Laboratory of Pollution Control & Resource Reuse, Fujian Normal University, Fuzhou, Fujian Province 350007, China.
Chemosphere. 2019 Jan;215:380-387. doi: 10.1016/j.chemosphere.2018.10.057. Epub 2018 Oct 11.
A reticulated vitreous carbon (RVC) cathode modified by anodic polarization in 20 wt% HSO solution was used for drinking water disinfection under a neutral low electrolyte concentration (0.25 g/L NaSO) condition. The contribution of the modified RVC anode and the Ti/RuO cathode to disinfection was investigated. The influences of current, initial Escherichia coli load, temperature and water volume were studied. The results show that HO generation increased to approximately three times using the modification of the RVC. E. coli was mainly deactivated by the HO generated at the cathode. For water with about 10 CFU/mL E. coli, the detection limit (<4 CFU/mL) was reached under different conditions. Increasing current could simultaneously shorten the treatment time and increase the energy consumption (EC) simultaneously. Although decreasing the initial load reduced the treatment time, the EC for per log E. coli removal increased. The time required for disinfection shortened from 3.5 to 2.5 h and the EC for per log removal decreased from 218.5 to 123.2 Wh/m when the temperature increased from 20 to 40 °C. Although more time was required for disinfection, the EC decreased from 218.5 to 141.4 Wh/m when the volume was doubled.
一种采用 20wt%HSO 溶液阳极极化处理的泡沫状碳纤维（RVC）阴极，在中性低电解质浓度（0.25g/L NaSO）条件下，用于饮用水消毒。研究了改性 RVC 阳极和 Ti/RuO 阴极对消毒的贡献。考察了电流、初始大肠杆菌负荷、温度和水量的影响。结果表明，RVC 的改性可使 HO 生成量增加约 3 倍。大肠杆菌主要是通过阴极生成的 HO 失活。对于初始大肠杆菌负荷约为 10CFU/mL 的水样，在不同条件下均达到检测限（<4CFU/mL）。增加电流可以同时缩短处理时间和增加能量消耗（EC）。虽然降低初始负荷可以减少处理时间，但每对数去除的 EC 增加。当温度从 20°C 升高到 40°C 时，消毒所需的时间从 3.5 小时缩短到 2.5 小时，每对数去除的 EC 从 218.5Wh/m 降低到 123.2Wh/m。虽然消毒所需的时间增加，但当体积增加一倍时，EC 从 218.5Wh/m 降低到 141.4Wh/m。
