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題 名 | Adsorption Behavior of Dye AAVN and RB4 in Acid Solutions on Chemically Cross-Linked Chitosan Beads=交聯化幾丁聚醣在酸性溶液中對染料AAVN與RB4吸附行為之研究 |
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作 者 | 邱明申; 賀邦彥; 李星迓; | 書刊名 | Journal of the Chinese Institute of Chemical Engineers |
卷 期 | 34:6 2003.11[民92.11] |
頁 次 | 頁625-634 |
分類號 | 465.3 |
關鍵詞 | 交聯化幾丁聚醣; 染料; Adsorption capacity; Anionic dyes; Cross-linked chitosan beads; Langmuir isotherm; Pseudo second-order model; Competitive adsorption; |
語 文 | 英文(English) |
中文摘要 | 本研究是利用交聯化之幾丁聚醣在酸性溶液中吸附酸性染料(AAVN)及反應性染料(RB4),實驗結果發現效果十分顯著在pH3,30°C下對於AAVN及RB4之Langmuir單層最大吸附量分別為3362與3823 g/kg,是相同條件下市售活性碳吸附量的6.6與6.0倍;並以ADMI真色色度與COD的變化量來研究混合染料在不同初濃度及pH值下動力學行為。另外幾丁聚醣對於兩種染料是否會產生競爭吸附,在本研究中亦一併做探討。 |
英文摘要 | One kind of adsorbent with a high adsorption capacity for anionic dyes was prepared using ionically and chemically cross-linked chitosan beads. A batch system was applied to study the adsorption of one acid dye (AAVN) and one reactive dye (RB4) in aqueous solutions by the cross-linked chitosan beads. The adsorption capacities (g/kg) had very large values of 3362 (AAVN) and 3823 (RB4) at pH 3, 30°C, which were 6.6 (AAVN) and 9.0 (RB4) times that of those of the commercial activated carbon. The Langmuir and Freundlich adsorption models were applied to describe the equilibrium isotherms. The Langmuir model agreed very well with the experimental data (R2>0.9980). The kinetics of adsorption for a single dye and the kinetics of removal of ADMI color value and COD for dyes in mixture solutions at different initial dye concentrations and pHs were evaluated by the pseudo first-order and second-order models. The data agreed very well with the pseudo second-order kinetic model. The study of competitive adsorption showed that the adosorption favored AAVN slightly in the experiments with higher dye concentrations. |
本系統中英文摘要資訊取自各篇刊載內容。