高铁酸钾氧化-絮凝处理苯酚废水过程中pH值的变化  

Variations of pH Value During Oxidation and Flocculation of Phenol by Potassium Ferrate

作　　者：贾世超 崔建国[1,2] JIA Shi-chao;CUI Jian-guo(Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China;Shanxi Municipal Innovation Center of Graduate Education, Taiyuan 030024, China)

机构地区：[1]太原理工大学环境科学与工程学院,太原030024 [2]山西省市政工程研究生教育创新中心,太原030024

出　　处：《中国农村水利水电》2018年第4期159-164,共6页China Rural Water and Hydropower

基　　金：山西省自然科学基金项目(201701D121126)

摘　　要：以提高苯酚去除率为目的,通过改变反应条件,研究高铁酸钾氧化-絮凝降解模拟苯酚废水时快速搅拌1min、氧化反应完成、絮凝反应完成时pH值的变化,根据pH值变化做机理分析。结果表明:快速反应1 min后与最终滤液的pH值在最适温度度下最高;絮凝反应后最终滤液的pH值会随高铁酸钾投加量先增大后减小,随原水pH值由极酸到极碱的变化,最终滤液的pH值固定在7.22~12.05碱性范围内。此研究表明,在较好的氧化条件下产酸较多,使pH值呈现降低趋势,在较好的絮凝条件下会产生Fe(OH)3使得最终滤液的pH值呈现增加趋势,但最终滤液的pH值会固定在弱碱性范围内。To improve the phenol removal rate for the purpose of changing reaction conditions,this paper studies the effects of potassium ferrate on the removal of simulated phenol wastewater for 1 min,the completion of the oxidation reaction,and the change of pH value in the final filtrate after flocculation reaction. The mechanism of the process is analyzed by the change in pH value. The results show that： Oxidation-flocculation（adsorption） of potassium ferrate to remove phenol from simulated wastewater,after rapid reaction for 1 min,the pH of the final filtrate is the highest at the optimum temperature. After the flocculation reaction,the pH value of the filtrate will increase first and then decrease with the dosage of potassium ferrate,and the pH value of the final filtrate is fixed in the alkaline range of 7. 22 ~ 12. 05 with the change in the pH value of the raw water inside. The results show that more acid is produced under better oxidation conditions,and the pH value tends to decrease,and Fe（OH）3 is produced under better flocculation conditions to increase the pH value of the final filtrate trend,but the final filtrate pH will be fixed in the weak alkaline range. This study provides a theoretical guidance for the change in pH of potassium ferrate to remove phenol.

关 键 词：高铁酸钾 PH 苯酚 

分 类 号：TV674[水利工程—水利水电工程]