泡沫分离法回收水溶液中微量钼(Ⅵ)的研究  

Study on recovering trace Mo(Ⅵ) from aqueous solution by foam fractionation method

作　　者：张翰林[1] 张永强[1] 王静[1] 时美玲[1] 赵孝先[1] 

机构地区：[1]燕山大学环境与化学工程学院,河北秦皇岛066004

出　　处：《无机盐工业》2012年第6期43-45,共3页Inorganic Chemicals Industry

摘　　要：以十六烷基三甲基氯化铵(CTAC)为表面活性剂,采用自制的泡沫分离塔回收水溶液中的微量钼(Ⅵ),考察了溶液pH、空气流量、表面活性剂质量浓度等对钼(Ⅵ)回收率和富集率的影响,并对该过程进行动力学分析。实验结果表明:随溶液pH增加,钼(Ⅵ)的富集率和回收率均先增加后减少;随CTAC浓度增加,钼(Ⅵ)的回收率增加而富集率减少;随空气流量增加,钼(Ⅵ)的富集率减少而回收率先增加后减少。在溶液pH为9、气体流量为200 mL/min、表面活性剂质量浓度为0.30 g/L条件下,钼(Ⅵ)的回收率达到90%,富集倍数达到10倍。动力学分析表明,泡沫分离钼(Ⅵ)的过程是零级动力学过程,拟合方程为ρ=-0.288 8t+4.290 4,R2=0.993 8。Trace Mo （ VI ） in aqueous solution was recovered by home-made foam fractionation tower with CTAC as the surfactant.Influences of pH of solution, air flow, and mass concentration of CTAC etc. on recovery rate and enrichment rate of Mo（VI ） were investigated and the kinetics analysis was also made.Experimental results showed that both the recovery and enrichment rates increased at first and then decreased with the increasing of pH ; the recovery rate increased but enrichment rate decreased with the increasing of CTAC concentration;the enrichment rate decreased, and the recovery rate increased at first and then decreased with the increasing of air flow.Recovery rate and enrichment rate of Mo（ Wl ） were up to 90% and 10 times, respectively, under the conditions of pH=9, air flow of 200 mL/min, and CTAC mass concentration of 0.30 g/L.The kinetics analysis indicated that ihe fractionation process was zero order process and the fitted equation was p=-0.288 8t＋ 4.290 4,Rz=-0.993 8.

关 键 词：泡沫分离 CTAC 钼 

分 类 号：TQ136.12[化学工程—无机化工]