Efficient removal of dyes from aqueous solutions using a novel hemoglobin/iron oxide composite.
Efficient removal of dyes from aqueous solutions using a novel hemoglobin/iron oxide composite.
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DOI：
10.1016/j.chemosphere.2018.04.182
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发表时间：
2018-05
期刊：
影响因子：
8.8
通讯作者：
Matthew Essandoh;Rafael A. Garcia
中科院分区：
文献类型：
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作者：
Matthew Essandoh;Rafael A. Garcia
具有高热稳定性、低毒性、表面可相互作用、高饱和磁化强度的磁性粒子是研究的热点。本工作的目的是合成一种新的血红蛋白/氧化铁复合物（Hb/Fe 3 O 4），用于从水溶液中去除不同的染料（靛蓝胭脂红、萘酚蓝黑、柠檬黄、赤藓红、铬黑T和溴酚蓝）。采用扫描电子显微镜（SEM）、激光衍射粒度分析、红外光谱、等电点测定和热重分析（TGA）对Hb/Fe 3 O 4复合材料进行了表征。Hb/Fe 3 O 4复合材料对不同种类的染料均表现出较高的去除率，吸附机理以静电作用为主。吸附遵循准二级动力学模型和Langmuir等温线。单分子层吸附容量为80 ~ 178 mg/g。Hb/Fe_3O_4复合物具有易于使用外部磁体从水悬浮液中分离的额外优点。实验还证明了Hb/Fe 3 O 4复合材料的稳定性。
Magnetic particles entrapped in different matrices that display high thermal stability, low toxicity, interactive functions at the surface, and high saturation magnetization are of great interest. The objective of this work was to synthesize a novel hemoglobin/iron oxide composite (Hb/Fe3O4) for the removal of different dyes (indigo carmine, naphthol blue black, tartrazine, erythrosine, eriochrome black T and bromophenol blue) from aqueous solutions. The Hb/Fe3O4composite was characterized using scanning electron microscopy (SEM), laser diffraction particle size analysis, FT-IR spectroscopy, isoelectric point determination and thermogravimetric analysis (TGA). The Hb/Fe3O4composite showed high removal efficiency toward all the different classes of dyes studied and the mechanism of adsorption was dominated by electrostatic interaction. Adsorption was found to follow pseudo-second order kinetic model and Langmuir isotherm. The Langmuir monolayer adsorption capacities for all the dyes range from 80 to 178 mg/g. The Hb/Fe3O4composite possesses extra advantage of being easily isolated from aqueous suspension using an external magnet. The stability of the prepared Hb/Fe3O4composite was also demonstrated.