Preparation of cellulose derived from corn stalk and its application for cadmium ion adsorption from aqueous solution

• Published in: Carbohydrate polymers 2012-10, Vol.90 (2), p.1008-1015
• Main Authors: Zheng, Liuchun, Zhu, Chaofei, Dang, Zhi, Zhang, Hui, Yi, Xiaoyun, Liu, Congqiang
• Format: Article
• Language: English
• Subjects: Adsorbents; Adsorption; Agronomy. Soil science and plant productions; Applied sciences; aqueous solutions; Biological and medical sciences; cadmium; Cadmium - isolation & purification; Cadmium - pharmacokinetics; carbon; Cellulose; Cellulose - chemistry; Cellulose - isolation & purification; Cellulose - metabolism; Cellulose - pharmacology; Cellulose and derivatives; Chemistry; Corn stalk; corn stover; crystal structure; energy; Exact sciences and technology; Fundamental and applied biological sciences. Psychology; General agronomy. Plant production; General and physical chemistry; Hydrogen-Ion Concentration; ions; Ions - pharmacokinetics; Isolation; Kinetics; Models, Biological; Modification; Natural polymers; nuclear magnetic resonance spectroscopy; Physicochemistry of polymers; scanning electron microscopes; Solutions - chemistry; sorption isotherms; stable isotopes; Surface physical chemistry; Use of agricultural and forest wastes. Biomass use, bioconversion; Water - chemistry; Water Pollutants, Chemical - isolation & purification; Water Pollutants, Chemical - pharmacokinetics; Water Purification - methods; X-Ray Diffraction; Zea mays - chemistry
• ISSN: 0144-8617; 1879-1344
• DOI: 10.1016/j.carbpol.2012.06.035

► Cellulose was isolated from corn stalk further and produced efficient adsorbent. ► GE value and adsorption capacities of isolated cellulose were better. ► Adsorption ability of isolated cellulose are near to corn stalk copolymer. ► The R2 values for isolated cellulose in all isotherms were highest. ► Cellulose isolated from corn stalk was found to be a potential adsorbent. Cellulose was isolated from corn stalk and modified by graft copolymerization to produce an absorbent material (AGCS-cell), which was characterized by scanning electron microscope and energy disperse spectroscopy (SEM–EDS), X-ray diffraction (XRD) and solid-state CP/MAS 13C NMR. The results showed that AGCS-cell had better adsorption potential for cadmium ion than unmodified cellulose because of the addition of functional groups (CN and OH groups) and the lower crystallinity. The Langmuir isotherms gave the best fit to the data and gave an adsorption capacity was 21.37mgg−1, which was close to unpurified cellulose (AGCS) and reflected the feasibility of using AGCS-cell as an adsorbent to remove cadmium ions.