CTMAB复合有机膨润土改性粉煤灰吸附高盐苯胺废水的特性研究  

STUDY ON ADSORPTION CHARACTER OF THE MODIFICATION FLY ASH WITH CTMAB AND BENTONITES FOR THE HYPERSALINE ANILINE WASTEWATER

作　　者：赵芝清[1,2] 田宝虎 佘孝云 

机构地区：[1]衢州学院化学与材料学院,浙江衢州324000 [2]浙江大学环境与资源学院,浙江杭州310058 [3]浙江省能源与核技术应用研究院,浙江杭州310018

出　　处：《水处理技术》2014年第6期29-32,共4页Technology of Water Treatment

基　　金：浙江省衢州市科技项目(20091049)

摘　　要：为了提高粉煤灰对高盐苯胺废水的吸附性能,首先通过正交实验优化了溴化十六烷基三甲胺(CTMAB)复合膨润土改性粉煤灰的条件。实验发现,CTMAB复合膨润土改性粉煤灰的最佳条件为:CTMAB2%、膨润土4%、浸泡时间2h、浸泡温度50℃。进而,考察了改性粉煤灰对高盐苯胺废水的吸附特性。结果表明:当盐度为10%、苯胺初始质量浓度为200 mg/L时,原灰对苯胺的吸附量为1.78 mg/g,而改性粉煤灰对苯胺的吸附量高达7.15 mg/g,明显高于原灰;当盐度由0增至15%时,改性粉煤灰对苯胺量由6.15 mg/g增至7.30 mg/g,高盐度有利于苯胺的吸附;改性粉煤灰对苯胺吸附过程更适宜用Freundlich方程描述。最后,通过比表面测定、扫描电镜(SEM)、X射线衍射(XRD)和EDS能谱分析,探讨了改性粉煤灰的结构及其改性机理。To improve the adsorption performance of the hypersaline aniline wastewater, the fly ash was modified with the hexadecyl trimethyl ammonium bromide （CTMAB） and bentonite, and the optimization conditions for fly ash modification were obtained using orthogonal array design test method. The results showed that the optimum conditions for preparation of the modified fly ash were as follows： CTMAB 2%, bentonite 4%, soaking time 2 h and soaking temperature 50 ~C. Then, its adsorption capability for the hypersaline aniline wastewater was studied. When the salinity is 10% and the initial concentration of aniline is 200 mg/L, the amount of aniline adsorption on the fly ash and modification fly ash is 1.78 mg/g and 7.15 mg/g, respectively; as the salinity increased from 0% to 15%, t.he amount of aniline adsorption increased fi＇om 6.15 mg/g to 7.30 mg/g; the results also showed that the adsorption isotherms could be described by Freundlich isotherms. Finally, the structure of the modification fly ash and modification mechanism was discussed by the specific surface area, the scanning electron microscopy（SEM）, X-ray diffraction （XRD） and energy-dispersive spectrometry （EDS）.

关 键 词：CTMAB复合膨润土 改性 粉煤灰 FREUNDLICH方程 改性机理 

分 类 号：X703.1[环境科学与工程—环境工程]