水热法制备Mg-Fe类水滑石及对水中硫酸根离子吸附的研究  

Hydrothermal Preparation of Mg-Fe HTLCs and Study on Remove Sulfate Ions from Aqueous Solution

作　　者：吕洪滨[1] 李瑶[1] 张万友[1] 高洪波[1] 

机构地区：[1]东北电力大学化学工程学院,吉林132012

出　　处：《硅酸盐通报》2015年第1期138-142,共5页Bulletin of the Chinese Ceramic Society

摘　　要：采用尿素分解水热合成法制备Mg-Fe类水滑石,并通过XRD,FT-IR表征。利用Mg-Fe类水滑石焙烧产物对水中硫酸根离子进行一定条件的吸附去除。结果表明,Mg-Fe类水滑石层间阴离子为碳酸根,结晶效果较好。焙烧后Mg-Fe类水滑石在pH=4-8,温度为35℃,对初始浓度500mg/L硫酸根离子具有较好的吸附能力,90min可快速达到吸附平衡,吸附数据表明该吸附符合准二级动力学方程,吸附等温线符合Langmuir吸附模型,最大吸附量为151.51mg/g。Mg-Fe hydrotalcite-like compound were synthesized via an urealysis hydrothermal method,and characterized by XRD and FT-IR. The roasted products were used to remove sulfate ions by the adsorptive ability from aqueous solution under certain condition. Results showed that the synthesized materials have fine crytallinity with CO2-3as the interlayer anions. The calcined Mg-Fe hydrotalcite-like compound have fine adsorption capacity for aqueous solution with initial sulfate ions concentration of 500 mg / L,under p H = 4-8 and temperature of 35 ℃,the adsorption equilibrium was about 90 min under the optical condition. The experimental data showed a good compliance with the pseudo-second-order kinetic model. The adsorption isotherm data met Langmuir models well,and it was found that the maximal adsorption capacity reached 151. 51 mg / g.

关 键 词：Mg-Fe类水滑石 吸附 硫酸根离子 

分 类 号：X703[环境科学与工程—环境工程]