摘要
采用"共沉淀法"制备Mg/Al-LDH、Mg/La-LDH、Ni/La-LDH 3种不同类型的水滑石类化合物。通过对比这3类化合物对Cr(VI)的吸附性能,确定最佳吸附剂类型为Mg/Al-LDH(3∶1)系列。以Mg/Al-LDH(3∶1)为研究对象,通过FTIR、XRD、SEM、TG-DTG等表征手段,研究材料的形貌、晶相结构、表面官能团及热稳定性等物化参数。考察p H、反应温度等因素对LDH吸附Cr(VI)效果的影响以及吸附量随时间的变化规律,并对产物的吸附动力学进行了研究。
Mg / Al,Mg / La,Ni / La three different types of LDH compounds were prepared by copreciptation method. Comparing the three kinds of hydrotalcite compounds’ adsorption effect to Cr（ Ⅳ） confirmed that the Mg / Al-LDH showed the best adsorption effect. The property of surface morphology,crystal structure,surface function groups and thermal stability were researched using FTIR,XRD,SEM and TG-DTG characterization methods. Investigated p H,reaction temperature on the adsorption of LDH and adsorption Cr（ VI） with the effect of variation of the time,and the adsorption kinetics of the product were also studied.
出处
《应用化工》
CAS
CSCD
北大核心
2015年第12期2255-2259,共5页
Applied Chemical Industry
关键词
水滑石
吸附
六价铬
hydrotalcite
adsorption
chromium（Ⅳ）
