Modified cellulose membrane prepared from corn stalk for adsorption of methyl blue
In this study, amino functionalized corn stalk (CS) cellulose membrane (ACM) was prepared to adsorb methyl blue from aqueous solution. Cellulose was obtained by treating CS pulp with NaOH and mixed acid and cellulose membrane (CM) was prepared by using NaOH/thiourea as solvent via phase inversion technique. The CM was modified with epoxy chloropropane and diethylenetriamine to acquire ACM. The cellulose content in CS pulp was measured after alkali and mixed acid treatment and membranes were characterized by FTIR, XRD and TG. Elemental composition of membranes was determined and membrane surface was observed through SEM. The tensile strength, contact angle, water flux and water retention of membranes were tested and the adsorption of methyl blue by ACM was investigated. Compared to CM, the ACM has higher water flux and lower contact angle and water retention. The tensile strength of ACM was 45 MPa and the adsorption capacity for methyl blue was 8.75 mg/g. Adsorption isotherms showed that Langmuir adsorption isotherm provided better fit for ACM adsorption. The study provided a new technology to prepare adsorbents from natural biomass for methyl blue removal.
Publisher URL: https://link.springer.com/article/10.1007/s10570-017-1523-3
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