Preparation of ZIF-8 modified bacterial cellulose membrane and adsorption performance study on tetracycline hydrochloride
In this study,bacteria cellulose/zeolite imidazole framework-8(BC/ZIF-8)composite fiber membrane was prepared by one-step vacuum filtration method using zeolite imidazole framework-8 and bacterial cellulose as carrier.The structure of the composite fiber membrane was characterized by FT-IR,XRD,SEM,EDS and BET techniques.The effects of contact time,temperature,ion concentration and initial substrate concentration on the adsorption of tetracycline hydrochloride(TC)on the composite fiber membrane were investigated.The results showed that the BC/ZIF-8 composite fiber membrane had a richer pore structure than the BC mem-brane,and the specific surface area increased from 6.2415 m2/g to 265.8820 m2/g.The adsorption experiment shows that the ion concentration has insignificant effect on adsorption,and the adsorption process follows the quasi second-order kinetic model and Langmuir isotherm adsorption model.The adsorption of TC on the BC/ZIF-8 composite fiber membrane was mainly in the form of monolayer adsorption,with a theoretical maximum adsorption capacity of 438.59 mg/g.