摘要
以费托合成水为研究对象,考察其在过硫酸盐热、碱活化体系中的COD脱除率变化情况,对影响降解反应过程的因素包括过硫酸钠投加量、反应温度、初始pH以及反应时间进行考察,并建立了COD脱除率与各影响因素的数学模型;为了进一步对反应过程进行研究,确定了反应体系中的活性物质为硫酸根自由基和羟基自由基。结果表明,过硫酸钠投加量为150 g/L,反应初始pH为2.34,反应温度70℃的反应速率常数是反应温度为40℃时的2.08倍,影响活化过硫酸钠处理费托合成水的COD脱除率的因素排序:反应时间>反应温度>初始pH>过硫酸钠投加量。回归方程中,初始pH与反应时间交互作用极为显著,最优实验条件为:过硫酸钠投加量173.25 g/L,反应温度70℃,初始pH为11.20,反应6 h,COD的脱除率为67.65%。
Taking F-T(Fischer-Tropsch)synthetic water as the research object,the variation of COD removal rate in the persulfate thermal and alkaline activation was investigated.The influencing factors of the degradation reaction process were investigated,including sodium persulfate dosage,reaction temperature,initial pH value and reaction time.The mathematical model of COD removal rate and each influencing factor were established.To further study the reaction process,the active substances in the reaction system were determined to be sulfate radical and hydroxyl radical.The results showed that the dosage of sodium persulfate is 150 g/L,the initial pH value of the reaction is 2.34,and the reaction rate constant at 70℃is 2.08 times that at 40℃.The order of influencing factors for the COD removal rate of activated sodium persulfate treated Fischer-tropsch water is as follows:reaction time>reaction temperature>initial pH>dosage of sodium persulfate.In the regression equation,the interaction between the initial pH value and reaction time is extremely significant.The optimal experimental conditions are as follows:sodium persulfate dosage of 173.25 g/L,reaction temperature of 70℃,initial pH value of 11.20,and 6 h reaction.The COD removal rate is 67.65%.
作者
贾梦磊
耿春宇
高琳
李国强
JIA Menglei;GENG Chunyu;GAO Lin;LI Guoqiang(Synfuels China Technology Holdings Co.,Ltd,Beijing 101407,China;Synfuels China Technology(Inner Mongolia)Co.,Ltd,Ordos 010321,China)
出处
《水处理技术》
CAS
CSCD
北大核心
2023年第10期81-85,共5页
Technology of Water Treatment
基金
鄂尔多斯市科技重大专项项目(2021ZD工46-9)。
关键词
费托合成水
过硫酸盐
响应面
动力学
反应机理
fischer-tropsch synthetic water
persulfate
response surface
kinetics
reaction mechanism
