摘要
全球超过2.6亿人受高氟地下水影响,饮用高氟地下水不利于人体健康。在除氟方法中,电絮凝除氟效果好、便于控制、操作简单,适用于偏远、居住分散地区饮用水除氟。电极连接方式是电絮凝的重要影响参数,提出除氟性能最佳的电极连接方式,对电絮凝除氟的应用具有重要意义,该研究从除氟效果、过程机理角度,对比单极并联、单极串联、复极串联三种电极连接方式的差异。结果表明,在初始氟浓度5 mg/L、电流密度20 A/m^(2)、电极间距15mm的条件下,三种电极连接方式的电絮凝反应结束后氟浓度小于1.0 mg/L,符合我国饮用水标准;单极串联与单极并联、复极串联相比,可减小电耗28%~38%,减少电极消耗30%~47%,减小絮体量35%~48%;电絮凝中的氟通过吸附在氢氧化铝絮体中去除。研究显示,单极串联是最佳电极连接方式。
More than 260 million people worldwide are affected by groundwater with high fluoride,and drinking high fluoride groundwater pose a threat to human health.Among the defluoridation methods,electrocoagulation has good defluoridation effect,easy control,and simple operation,making it suitable for defluoridation of drinking water in remote and dispersed areas.The electrode connection mode is an important influencing parameter of electrocoagulation.It is of great significance for the application of electrocoagulation defluoridation that the electrode connection mode with the best defluorination performance is proposed.This study compares the differences between three electrode connection modes,namely monopolar electrodes in parallel connection,monopolar electrodes in serial connection and bipolar electrodes in serial connection,from the perspective of the fluoride removal effectiveness and defluoridation process and mechanism,in order to improve the application possibility of electrocoagulation for defluoridation.The results indicate that when the initial fluorine concentration is 5 mg/L,the current density is 20 A/m^(2),and the electrode spacing is 15 mm,the fluorine concentration after electrocoagulation of the three electrode connection modes is less than 1.0 mg/L,which meets the drinking water standards of China.Compared with monopolar electrodes in parallel connection and bipolar electrodes in serial connection,monopolar electrodes in serial connection can reduce electro power consumption by 28%~38%,electrode consumption by 30%~47%,and floc volume by 35%~48%.Fluoride in electrocoagulation is removed by adsorption in aluminium hydroxide floc.The study shows that monopolar electrodes in serial connection is the best electrode connection mode.
作者
冯健恒
陈明如
郭旭
周斌龙
周律
FENG Jianheng;CHEN Mingru;GUO Xu;ZHOU Binlong;ZHOU Lü(School of Environment,Tsinghua University,100084;Beijing General Municipal Engineering Design&Research Institute Co.,Ltd.,100082;Rural Healthy Drinking Water Affairs Center of Fangshan District,Fangshan District Water-affair Authority,102488,Beijing,China)
出处
《水处理技术》
北大核心
2025年第7期90-96,112,共8页
Technology of Water Treatment
基金
国家重点研发计划项目(2019YFC0408700)。
关键词
电絮凝
电极连接方式
除氟
饮用水
地下水
electrocoagulation
electrode connection modes
defluoridation
drinking water
groundwater
