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通过共沉淀法制备一系列含有不同阳离子的层状双金属氢氧化物(M2+-M3+-LDHs,M2+为Zn2+或Mg2+,M3+为Fe3+或Al3+),采用X射线衍射仪(XRD)、BET、X射线荧光光谱仪(XRF)手段对材料进行了表征,研究了不同阳离子比例、种类和初始p H对LDHs吸附诺氟沙星(NOR)的影响。结果表明,n(M2+):n(M3+)=2:1时的LDHs材料对NOR的吸附量最大,且Mg-Al-LDHs的吸附效果最好;LDHs对诺氟沙星的吸附过程符合准2级动力学,吸附过程符合langmiur吸附类型,p H在3~10内吸附量稳定。
A series of layered double metal hydroxides (M2 + -M3 + -LDHs with M2 + as Zn2 + or Mg2 + and M3 + as Fe3 + or Al3 +) with different cations were prepared by coprecipitation method. XRD, BET, X XRF was used to characterize the effect of different cation ratios, species and initial p H on the adsorption of norfloxacin (NOR) by LDHs. The results showed that the adsorption capacity of NOR for the n (M2 +): n (M3 +) = 2: 1 was the largest and the adsorption of Mg-Al-LDHs was the best. The adsorption of norfloxacin by LDHs was in good agreement Level 2 kinetics, the adsorption process in line with the langmiur adsorption type, p H adsorption capacity within 3 to 10 stable.