水铝钙石吸附水中F^-影响因素及动力学研究  

Affecting Factors and Kinetics of F^- Adsorption in Water by Hydrocalumite

作　　者：许昶雯 何孟杰 张进[2] 张磊 XU Chang-wen;HE Meng-jie;ZHANG Jin;ZHANG Lei(College of Civil and Architecture Engineering,Chuzhou University;66220 Unit of the PLA,Chuzhou,Anhui 239000)

机构地区：[1]滁州学院土木与建筑工程学院 [2]中国人民解放军66220部队,安徽滁州239000

出　　处：《怀化学院学报》2020年第5期85-89,共5页Journal of Huaihua University

基　　金：安徽省大学生创新创业项目“改性水铝钙石对水中氟离子的优化去除”(S201910377110);安徽省高校自然科学研究重点项目“不同污染类型的河道细菌群落特征及机制研究”(KJ2019A0641).

摘　　要：研究水铝钙石对水中超标F^-吸附过程中的影响因素和动力学模型,考察了焙烧温度、水铝钙石投加量、反应时间、转速等对F^-吸附率的影响,并分别利用拟一级、拟二级和层间扩散模型对水铝钙石吸附F^-过程进行动力学研究.结果表明:当水铝钙石焙烧温度为500℃,F^-吸附率最高;随着水铝钙石投加量和反应时间的增加,F^-吸附率增大;而转速不是影响F^-吸附率的主要因素.当水铝钙石焙烧温度为500℃,投加量为12 g/L时,其在4 h内对初始浓度为10 mg/L的F^-溶液吸附率达到了97.89%.动力学研究表明:水铝钙石吸附F^-过程更加符合拟二级动力学模型,相关系数达0.9999,吸附过程以化学反应为主,分两个阶段进行.The influencing factors and kinetic model of exceeding F^- adsorption in water by hydrocalumite were studied.The effects of calcination temperature,dosing amount of hydrocalumite,reaction time,and rotational speed on the F^- adsorption rate were investigated.The pseudo-first-order,pseudo-second-order,and interlayer diffusion models were used to study the kinetics of the F^- adsorption process by hydrocalumite.The results showed that the F^- adsorption rate was the highest when the calcined calasite temperature was 500℃.With the increase of hydrocalumite dosage and the reaction time,the F^- adsorption rate increases;but the speed was not the main factor affecting F^- adsorption When the calcination temperature was 500℃ and the dosage was 12 g/L,the adsorption rate of F^- solution with an initial concentration of 10 mg/L in 4 h reached 97.89%.Kinetic studies showed that the F^- adsorption process by hydrocalumite was more in line with the pseudo-second-order kinetic model,with a correlation coefficient of 0.9999.The adsorption process was dominated by chemical reactions and was carried out in two stages.

关 键 词：水铝钙石 F-吸附率 影响因素 动力学 

分 类 号：X703[环境科学与工程—环境工程]