摘要
以Al(NO_3)_3·9H_2O、Mg(NO_3)_2·6H_2O、Ba(NO_3)_2为原料,用共沉淀法制备了Mg/Al/Ba-三元水滑石,经过傅里叶红外光谱和比表面及孔径分析法进行表征。考察了该水滑石对重金属铬离子(Ⅲ)的吸附行为及干扰离子影响,优化了浓度、时间、温度、酸度(pH)等因素对Mg/Al/Ba-三元水滑石吸附性能的影响。结果表明,在最佳浓度13mg/mL、时间150min、温度30℃、pH=6时吸附容量最大达到400mg/g。
Mg/Al/Ba-ternary hydrotalcite was prepared by homogeneous co-precipitation using Al(NO_3)_3·9 H_2O,Mg(NO_3)_2·6 H_2O,and Ba(NO_3)_2 as starting materials.The product was characterized by Fourier transform infrared spectroscopy and specific surface and pore size analyzer.The effect of Mg/Al/Baternary hydrotalcite adsorption concentration,time,temperature,acidity(pH)and other ions on the adsorption of Cr(Ⅲ)was further investigated.Experimental results show that the highest adsorption capacity for Cr(Ⅲ)is 400 mg/g with the optimized conditions of 13 mg/mL for the concentration of Mg/Al/Ba-ternary hydrotalcite,150 min for the time,30 ℃for the adsorption temperature and pH=6.
出处
《化学世界》
CAS
CSCD
2017年第11期675-679,共5页
Chemical World
基金
贵州省教育厅黔教合KY字[2016]083号
贵州师范学院大学生科研(No.2015DXS133)资助项目
关键词
水滑石
合成
吸附
铬(Ⅲ)
layered double hydroxide
synthesis
adsorption
Cr(Ⅲ)
