Adsorption Performance of Cinnamomum Longipaniculatum Activated Carbon toward Sulfadiazine
The cinnamomum longipaniculatum activated carbon from leaf residues of cinnamomum longipaniculatum was characterized with fou-rier transform infrared spectroscopy(FTIR)and Brunner-Emmet-Teller(BET)measurements.The effects of the dosage of activated carbon,adsorption time,initial concentration,temperature and pH on the removal of sulfadiazine in water were investigated.The results showed that the removal rate reached 54.4%with the initial concentration of sulfadiazine of 20 mg/L and 700 mg activated carbon.Adsorption performance was improved with adsorption time,and adsorption equilibrium was achieved after 1440 min.Removal rate showed a decreasing trend with increased pH,indicating that acidic environment was conducive to the adsorption toward sulfadiazine.Adsorption capacity rose with elevated temperature and then fell above 35℃.The adsorption fitted well to the quasi-second-order kinetics equation,Weber-Morris intraparticle difussion mod-el,Langmuir and Freundlich adsorption isotherm models,demonstrating that the adsorption was monolayer adsorption,and that the adsorption rate was mainly controlled by both internal particle difussion and surface adsorption.
leaf residues of cinnamomum longipaniculatumactivated carbonsulfadiazineadsorption
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