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首页> 外文期刊>Journal of Polymers and the Environment >Study on Adsorption Performance of MgO/Calcium Alginate Composite for Congo Red in Wastewater
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Study on Adsorption Performance of MgO/Calcium Alginate Composite for Congo Red in Wastewater

机译：废水中MgO /藻酸钙复合材料的吸附性能研究

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摘要

This research prepared a poly-functional material which has outstanding adsorption performance and easily recyclable for Congo red dye removal. The multifunctional gel yarn composed of calcium alginate and nano-magnesium oxide was prepared by wet spinning. For the morphology and structure of MgO/CA composite, the compound product was characterized by Field Emission Scanning Electron Microscope (FE-SEM), Fourier Transform infrared spectroscopy (FTIR) and Thermogravimetric analysis (TGA). Then, the adsorption performance of MgO/CA aerogel for Congo red was studied, including the influence of four factors (adsorbent dosage, pH, initial concentration, contact time), adsorption isotherm, adsorption kinetics and adsorption thermodynamics. The results show that the adsorption properties of MgO/CA aerogel on Congo red largely depend on these factors. The best contact time for MgO/CA aerogel to remove Congo red is 24 h. Besides, the maximum adsorption capacity of the adsorbents is usually very high (312.5, 322.6 and 344.8 mg/g at 303, 313 and 323 K, respectively). The adsorption kinetics can be best described by a pseudo second-order reaction, and the adsorption data agree well with the Langmuir model. Thermodynamic parameters including the changes in entropy (Delta S-0), free energy (Delta G(0)) and enthalpy (Delta H-0), and stated that adsorption by the MgO/CA aerogel was endothermic and spontaneous.
机译：该研究制备了一种多功能材料，具有出色的吸附性能，并且可容易可回收刚果红染料去除。通过湿旋转制备由藻酸钙和纳米氧化铝钙组成的多功能凝胶纱线。对于MgO / Ca复合材料的形态和结构，通过现场发射扫描电子显微镜（FE-SEM），傅里叶变换红外光谱（FTIR）和热重分析（TGA），表征化合物产物。然后，研究了MgO / Ca Airgel对刚果红色的吸附性能，包括四种因素（吸附剂剂量，pH，初始浓度，接触时间），吸附等温，吸附动力学和吸附热力学的影响。结果表明，刚果红色的MgO / CA Airgel的吸附性能主要取决于这些因素。 MgO / CA Airgel以删除刚果红色的最佳接触时间为24小时。此外，吸附剂的最大吸附能力通常非常高（312.5,322.6和344.8mg / g，分别为303,313和323k）。吸附动力学可以最好地由伪二阶反应描述，并且吸附数据与Langmuir模型很好。热力学参数包括熵（Δ-0），自由能（Delta G（0））和焓（Delta H-0）的变化，并说明MgO / Ca气凝胶吸附是吸热和自发的。

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  • 来源
    《Journal of Polymers and the Environment》 |2021年第12期|3977-3987|共11页
  • 作者

    Cui Mingfei; Li Yanhui; Sun Yong; Wang Huimin; Li Meixiu; Li Liubo; Xu Wenshuo;

  • 作者单位

    Qingdao Univ Coll Mech & Elect Engn 308 Ningxia Rd Qingdao 266071 Peoples R China;

    Qingdao Univ Coll Mech & Elect Engn 308 Ningxia Rd Qingdao 266071 Peoples R China|Qingdao Univ Coll Mech & Elect Engn State Key Lab Biofibers & Ecotext Qingdao 266071 Peoples R China;

    Qingdao Univ Coll Mech & Elect Engn 308 Ningxia Rd Qingdao 266071 Peoples R China;

    Qingdao Univ Coll Mech & Elect Engn 308 Ningxia Rd Qingdao 266071 Peoples R China;

    Qingdao Univ Coll Mech & Elect Engn State Key Lab Biofibers & Ecotext Qingdao 266071 Peoples R China;

    Qingdao Univ Coll Mech & Elect Engn 308 Ningxia Rd Qingdao 266071 Peoples R China;

    Qingdao Univ Coll Mech & Elect Engn 308 Ningxia Rd Qingdao 266071 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Calcium alginate; Magnesium oxide; Aerogel; Nanoparticle; Adsorption; Congo red;

    机译：藻酸钙;氧化镁;气凝胶;纳米粒子;吸附;刚果红色;

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