Removal of F- and organic matter from coking wastewater by coupling dosing FeCl3 and AlCl3

作     者：Shuo Li Mengjie Liu Fuming Meng Xia Hu Wenzheng Yu Shuo Li;Mengjie Liu;Fuming Meng;Xia Hu;Wenzheng Yu

作者机构：College of Resource and Environmental EngineeringGuizhou UniversityGuiyang 550025China Key Laboratory of Drinking Water Science and TechnologyResearch Centre for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100086China Jinan Municipal Engineering Design&Research Institute(Group)Co.LTDChina 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2021年第33卷第12期

页      面：2-11页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：supported by the National Natural Science Foundation of China(No.51108444) the Key Research and Development Plan of the Ministry of Science and Technology(No.2019YFD1100104) 。 

主　　题：Coagulation Coking wastewater Fluoride Organic matter 

摘      要：Coagulation and precipitation is a widely applied method to remove F-from wastewater.In this work,the effect of coagulation on the removal of F-and organic matter from coking wastewater was studied using Al Cl3and Fe Cl3as compound coagulants.The removal rates of F-and organic matter under different coagulant doses and p H conditions were investigated.The results show that the highest removal rates of F-by Al Cl3and Fe Cl3are 94.4%and 25.4%,respectively;when the dosage is 10 mmol/L,the TOC removal rates of Fe Cl3and Al Cl3reach 20.4%and 34.7%,respectively.Therefore,the removal rate of F-by Al Cl3is higher than that of Fe Cl3,but the removal rate of organic matter by Fe Cl3is relatively higher.The addition of Ca2+can promote the removal of F-,but the removal rate of organic matter decreases.In addition,by investigating the effects of different p H and Fe–Al ratio on the removal rate,the removal effect of adding Fe Cl3and Al Cl3at the same time was discussed.The results show that the most suitable working condition for the removal of organic matter and F-is that the p H is 6.5 and the molar ratio of Al/Fe is 8:2.Overall,the removal mechanism of F-and organic matter in coking wastewater by Fe Cl3and Al Cl3was explored in this study.The experimental results can provide reference for the advanced treatment of coking wastewater.