【摘要】：以蒙脫石(Mont)為原料,在不同OH/Fe物質(zhì)的量比(x)和Fe/Al物質(zhì)的量比(y)柱撐條件下制備出系列羥基鐵(x OH/Fe-Mont)、羥基鋁(OH/Al-Mont)和羥基鐵鋁(y Fe/Al-Mont)柱撐蒙脫石,采用XRD和FT-IR對柱撐蒙脫石進(jìn)行表征,并研究了柱撐改性對蒙脫石對慶大霉素(Gen)吸附行為的影響.結(jié)果表明:柱撐蒙脫石對Gen吸附量顯著提高,且Mont(42.83mg/g)OH/Al-Mont(63.50mg/g)1.5OH/FeMont(70.50mg/g)0.025Fe/Al-Mont(87.20mg/g),吸附Gen最佳p H值為9.等溫吸附適于采用Freundlich方程擬合,吸附動力學(xué)符合偽二級動力學(xué)方程,吸附3h可超過平衡吸附量的80%.XRD分析表明,羥基鐵和羥基鋁主導(dǎo)柱撐(y≤0.5)蒙脫石層間距擴(kuò)增是吸附量增加的主要原因,而y Fe/Al-Mont中y≥1.0時,層間距并不是吸附量變化的的主導(dǎo)機(jī)制;FT-IR分析表明陽離子交換是Gen和鋁離子進(jìn)入蒙脫石的主導(dǎo)機(jī)制.
[Abstract]:Montmorillonite (Mont) was prepared from montmorillonite (Mont). A series of hydroxyl iron (x OH/Fe-Mont), hydroxyl aluminum (OH/Al-Mont) and y Fe/Al-Mont pillared montmorillonite (y Fe/Al-Mont) montmorillonite were prepared under the conditions of (x) and Fe/Al ratios of OH/Fe and Fe/Al. The results were characterized by XRD and FT-IR. The effect of pillared modification on the adsorption of gentamicin (Gen) by montmorillonite was studied. The results showed that the adsorption capacity of Gen on pillared montmorillonite was significantly increased, and the optimum pH value of Mont (42.83mg/g) OH/Al-Mont (63.50mg/g) 1.5OH/FeMont (70.50mg/g) 0.025Fe/Al-Mont (87.20mg/g) was 9. The isothermal adsorption can be fitted by Freundlich equation, and the adsorption kinetics accords with pseudo-second-order kinetic equation. The 80%.XRD analysis shows that the adsorption capacity can exceed the equilibrium adsorption capacity for 3 hours. The increase of the interlayer spacing of montmorillonite (y 鈮，

本文編號：2206474