活性炭/甲壳素复合珠粒的制备及其染料吸附性能
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摘要
通过低温溶解法得到甲壳素溶液(C),将活性炭(A)作为分散相与甲壳素溶液共混,以硫酸溶液为凝固浴,通过滴注成型法制备了活性炭/甲壳素(A/C)复合珠粒,用于染料的吸附。采用扫描电子显微镜(SEM)和X射线衍射(XRD)表征了复合珠粒的结构,结果表明:该复合珠粒具有均匀的多孔结构,有利于染料的吸附及内部的传质。以亚甲基蓝为染料模型,吸附试验结果表明该复合珠粒对亚甲基蓝有良好的吸附效果,解吸附-再生试验表明该复合珠粒有良好的可重复利用性。该复合珠粒有望成为一种具有应用潜力的生物质类吸附材料。
The chitin solution(C) was obtained by dissolving chitin powders in a mixture solution at low temperature. A/C composite beads were gained with dropping method by blending the dispersed phase activated carbon(A) with chitin solution, using H_2SO_4 solution as coagulant. The structure of A/C composite beads was characterized by scanning electron microscope(SEM) and X-ray diffraction(XRD). The results indicate that the beads show porous structure, benefiting to the absorption and internal mass transfer of dyes. Methylene blue as a dye model was applied to evaluate the dye absorption of the composite beads and the result indicates the composite beads have good adsorption effectiveness. The desorption-regeneration tests show good recyclability of the composite beads. The composite bead is expected to become a kind of biomass adsorption material with good application potential.
The chitin solution(C) was obtained by dissolving chitin powders in a mixture solution at low temperature. A/C composite beads were gained with dropping method by blending the dispersed phase activated carbon(A) with chitin solution, using H_2SO_4 solution as coagulant. The structure of A/C composite beads was characterized by scanning electron microscope(SEM) and X-ray diffraction(XRD). The results indicate that the beads show porous structure, benefiting to the absorption and internal mass transfer of dyes. Methylene blue as a dye model was applied to evaluate the dye absorption of the composite beads and the result indicates the composite beads have good adsorption effectiveness. The desorption-regeneration tests show good recyclability of the composite beads. The composite bead is expected to become a kind of biomass adsorption material with good application potential.
引文
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[2] Fei J, Li C, Tang B, et al. Preparation of cellulose acetate/zeolite composite fiber and its adsorption behavior for heavy metal ions in aqueous solution[J]. Chemical Engineering Journal, 2012, 209: 325-333.
[3] Ranjithkumar V, Sangeetha S, Vairam S. Synthesis of magn-etic activated carbon/-Fe2O3 nanocomposite and its application in the removal of acid yellow 17 dye from water[J]. Journal of Hazardous Materials, 2014, 273:127-135.
[4] Do, M H, Phan, N H, et al. Activated carbon/Fe3O4 nanoparticle composite: Fabrication, methyl orange removal and regeneration by hydrogen peroxide[J]. Chemosphere, 2011, 85:1 269-1 276.
[5] Kumar M. A review of chitin and chitosan applications[J]. Reactive and Functional Polymers, 2000, 46:1-27.
[6] Rinaudo M. Chitin and chitosan: Properties and applications[J]. Progress in Polymer Science, 2006, 31:603-632.
[7] Knorr D. Recovery and unilization of chitin and chitosan infood processing waste management[J]. Food Technology, 1984, 1:3-9.
[8] Fang Y, Duan B, Lu A, et al. Intermolecular interaction and the wxtended wormlike chain conformation of chitin in NaOH/urea aqueous solution[J].Biomacromolecules,2015, 16(4):1 410-1 417.