Preparation of Functional Spunlaced Viscose Fiber/UiO-66-NH2 Membrane and its Adsorption Performance on Cr(Ⅵ)
UiO-66-NH2(a metal-organic skeleton)is difficult to recover in water in powder form,and the surface of spunlaced viscose fiber with a large number of hydroxyl groups,which has good hydrophilicity and can be produced on an industrial scale.Therefore,UiO-66-NH2 was uniformly grown on the surface of spunlaced viscose fiber by in-situ growth method to prepare UiO-66-NH2/spunlaced composite fiber membrane.The UiO-66-NH2/spunlaced composite fiber membrane was characterized by SEM,XRD,BET and FT-IR.The results showed that UiO-66-NH2 uniformly grew on the surface of spunlaced viscose fibers membrane.In addition,the effects of pH,adsorption time,adsorbent dosage and Cr(Ⅵ)concentration on the adsorption properties were further investigat ed.The results show that the maximum adsorption capacity is 129.37mg/g under the best suitable conditions.When pH=1,the removal rate of Cr(Ⅵ)remains at 76%after four cycles of adsorption,indicating that it has good recycling ability.The quasi-second-order kinetic model and Langmuir model can describe the chemisorbing process of Cr(Ⅵ)on UiO-66-NH2/spunlaced viscose composite fiber membrane well.
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