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首页> 外文期刊>Journal of Polymers and the Environment >Hydrogel-Based Bioflocculants for the Removal of Organic Pollutants from Biodiesel Wastewater
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Hydrogel-Based Bioflocculants for the Removal of Organic Pollutants from Biodiesel Wastewater

机译：基于水凝胶的生物絮凝剂，用于去除生物柴油废水中的有机污染物

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摘要

Hydrogel based bioflocculants namely Gelatin and acrylic acid-co-acrylamide [GL-cl-P(AA-co-AAM)] and hybrid hydrogel composite with good adsorption potential, were synthesized in this study for the treatment of biodiesel wastewater. The two hydrogels were characterized using X-Ray diffraction, Fourier transformed infra-red spectroscopy and scanning electron microscope. It was found that the synthesis provided the composite with the functional groups of the individual components. The hydrogels were found to achieve around 65 % of BOD removal and exhibited a maximum performance at a dosage 12.5 mg/L. The kinetic studies of the removal of BOD by all the hydrogels were found to follow the pseudo-second order kinetic model; the adsorption capacities of the GL-cl-P(AA-co-AAM) and the hybrid hydrogel composite were 11,368.8 and 12,787 mg/g, respectively. The flocs formed by the hybrid hydrogel composite and polyferric chloride were also more stable than those formed by the GL-cl-P(AA-co-AAM) and MgOH; implying that the incorporation of the attapulgite into the composite had resulted in the development of a better coagulant. The viability of the application of the hybrid hydrogel composite for the treatment of biodiesel wastewater could therefore be further investigated at pilot scale to prepare the implementation at large scale.
机译：本研究合成了基于水凝胶的生物絮凝剂，即明胶和丙烯酸-共-丙烯酰胺[GL-cl-P（AA-co-AAM）]以及具有良好吸附潜力的杂化水凝胶复合材料，用于处理生物柴油废水。使用X射线衍射，傅立叶变换红外光谱和扫描电子显微镜对两种水凝胶进行表征。发现合成为复合物提供了各个组分的官能团。发现水凝胶可实现约65％的BOD去除，并在12.5 mg / L的剂量下表现出最佳性能。发现所有水凝胶去除BOD的动力学研究均遵循拟二级动力学模型。 GL-cl-P（AA-co-AAM）和杂化水凝胶复合材料的吸附容量分别为11,368.8和12,787 mg / g。混合水凝胶复合材料和聚氯化铁形成的絮凝物也比GL-cl-P（AA-co-AAM）和MgOH形成的絮凝物更稳定。暗示将凹凸棒石掺入复合材料已导致形成更好的混凝剂。因此，可以在中试规模下进一步研究混合水凝胶复合材料在处理生物柴油废水中的可行性，以准备大规模实施。

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  • 来源
    《Journal of Polymers and the Environment》 |2017年第3期|844-853|共10页
  • 作者

    Fosso-Kankeu E.; Mittal H.; Marx S.; Ray S. S.;

  • 作者单位

    North West Univ, Sch Chem & Minerals Engn, Fac Engn, Potchefstroom Campus, Potchefstroom, South Africa;

    CSIR, DST, Natl Ctr Nanostruct Mat, ZA-0001 Pretoria, South Africa|Univ Johannesburg, Dept Appl Chem, ZA-2028 Doornfontein, South Africa;

    North West Univ, Sch Chem & Minerals Engn, Fac Engn, Potchefstroom Campus, Potchefstroom, South Africa;

    CSIR, DST, Natl Ctr Nanostruct Mat, ZA-0001 Pretoria, South Africa|Univ Johannesburg, Dept Appl Chem, ZA-2028 Doornfontein, South Africa;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Biodiesel wastewater; Hydrogels; Flocculation; Bioflocculants; Inorganic coagulants;

    机译：生物柴油废水;水凝胶;絮凝;生物絮凝剂;无机混凝剂;

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