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首页> 外文期刊>Journal of Polymers and the Environment >Synthesis of β-Cyclodextrin Immobilized Starch and Its Application for the Removal of Dyestuff from Waste-Water
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Synthesis of β-Cyclodextrin Immobilized Starch and Its Application for the Removal of Dyestuff from Waste-Water

机译：β-环糊精固定淀粉的合成及其在废水中除去染料的施用

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摘要

A natural polymeric adsorbent, -cyclodextrin immobilized starch (CS-CD) was prepared by introducing host functional molecule -cyclodextrin (-CD) onto starch in presence of citric acid. The immobilization conditions were optimized to: m CA:m CS=1:2, reaction time of 2h and reaction temperature at 120 degrees C, by varying the input levels of the reactant, CS-CD with a series of immobilization ratio (IR) and carboxyl content (CC) could be obtained. The FT-IR and C-13-NMR analysis indicated the -CD molecules have been immobilized onto starch via the formation of ester linkages. The XRD and SEM analysis showed CS-CD had more looser structure and more irregular surface compared with native starch. The GPC analysis showed CS-CD had a reduced molecular weight but a more complicated molecular configuration. The adsorbing capacities of CS-CD to three cationic dyes (methylene blue, methyl purple and basic fuchsin) were significantly improved compared with native starch, diatomite and zeolite. The adsorption behaviors of CS-CD to the three dyes had high fitting degrees to both Langmuir and Freundlich models (R-20.98). The decolourization ratio of CS-CD to the mixed dyestuff waste-water had reached 88.75%, which was much higher than other absorbents. The results indicated the CS-CD would become a high-efficiency dyestuff adsorbent, and would have a promising application in the industrial dyestuff waste-water treatment.
机译：通过在柠檬酸存在下将宿主官能团 - 环素（-Cd）引入淀粉中来制备天然聚合物吸附剂 - 环峰固定的淀粉（CS-CD）。通过改变反应物的输入水平，将固定条件优化为：M Ca：M Cs = 1：2，反应时间为2小时，反应温度为120℃，通过一系列固定率（IR），CS-CD可以获得羧基含量（CC）。 FT-IR和C-13-NMR分析表明，通过形成酯键将-Cd分子固定在淀粉上。 XRD和SEM分析显示CS-CD与天然淀粉相比，CS-CD具有更多的松动结构和更不规则的表面。 GPC分析显示CS-CD的分子量降低，但分子构型更加复杂。与天然淀粉，硅藻土和沸石相比，CS-Cd的吸附容量为三种阳离子染料（亚甲基蓝，甲基紫色和基本紫红色）。 CS-CD对三个染料的吸附行为对Langmuir和Freundlich模型（R-2> 0.98）的拟合度高。 CS-Cd与混合染料废水的脱色比率达到88.75％，比其他吸收剂远高得多。结果表明CS-CD将成为高效染料吸附剂，并在工业染料废水处理中具有有希望的应用。

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  • 来源
    《Journal of Polymers and the Environment》 |2019年第5期|929-941|共13页
  • 作者

    Zhang H.; Li Y. X.; Wang P. L.; Zhang Y.; Cheng B. W.; Sun Q. M.; Li F.;

  • 作者单位

    Tianjin Polytech Univ Sch Text Tianjin 300387 Peoples R China|Tianjin Polytech Univ State Key Lab Separat Membranes & Membrane Proc Tianjin 300387 Peoples R China;

    Tianjin Polytech Univ Sch Text Tianjin 300387 Peoples R China|Tianjin Polytech Univ State Key Lab Separat Membranes & Membrane Proc Tianjin 300387 Peoples R China;

    Tianjin Polytech Univ Sch Text Tianjin 300387 Peoples R China;

    Tianjin Polytech Univ Sch Text Tianjin 300387 Peoples R China;

    Tianjin Polytech Univ State Key Lab Separat Membranes & Membrane Proc Tianjin 300387 Peoples R China;

    Tianjin Polytech Univ Sch Text Tianjin 300387 Peoples R China;

    Tianjin Polytech Univ Sch Text Tianjin 300387 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Dyestuff waste-water; Cyclodextrin; Immobilization; Natural polymeric absorbent; Starch;

    机译：染料废水;环糊精;固定化;天然聚合物吸收剂;淀粉;

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