【摘 要】
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Al-Mn-pillared montmorillonite(AMPM) was prepared by using the artificial Na-montmorillonite from the Qingfengshan bentonite mine as starting materials mixed wi
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Al-Mn-pillared montmorillonite(AMPM) was prepared by using the artificial Na-montmorillonite from the Qingfengshan bentonite mine as starting materials mixed with Al-Mn pillaring solutions at different Al/Mn molar ratios(R).The basal spacing and specific surface area of the materials were increased significantly compared with untreated clays.When R=0.5, the d(001) value and specific surface area of pillared montmorillonite were 1.8987 nm and 146.01 m2 g-1,respectively.The thermal stability was determined using calcined tests,X-ray diffraction(XRD) analysis, thermal gravimetry and differential thermal analysis(TG-DTA).The materials formed at initial R=0.5 exhibited a high stability,the basal interlayer spacing was stabilized at 1.7859 nm after calcined for 2 h at 300℃.The adsorption behavior of the materials was studied by adsorption experiments.The results show the AMPM and calcined Al-Mn-pillared montmorillonite(CAMPM) exhibit a strong capacity of adsorbing the Zn(II) in aqueous solution at pH 10.0.
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