United States Department of Agriculture, Agricultural Research Service, Eastern Regional Research Center, Biobased and Other Animal Coproducts Research Unit, 600 East Mermaid Lane, Wyndmoor, PA 19038, USA.
United States Department of Agriculture, Agricultural Research Service, Eastern Regional Research Center, Biobased and Other Animal Coproducts Research Unit, 600 East Mermaid Lane, Wyndmoor, PA 19038, USA.
Chemosphere. 2018 Sep;206:502-512. doi: 10.1016/j.chemosphere.2018.04.182. Epub 2018 May 10.
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/FeO) for the removal of different dyes (indigo carmine, naphthol blue black, tartrazine, erythrosine, eriochrome black T and bromophenol blue) from aqueous solutions. The Hb/FeO composite was characterized using scanning electron microscopy (SEM), laser diffraction particle size analysis, FT-IR spectroscopy, isoelectric point determination and thermogravimetric analysis (TGA). The Hb/FeO composite 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/FeO composite possesses extra advantage of being easily isolated from aqueous suspension using an external magnet. The stability of the prepared Hb/FeO composite was also demonstrated.
具有高热稳定性、低毒性、表面相互作用功能和高饱和磁化强度的不同基质捕获的磁性颗粒非常有吸引力。本工作的目的是合成一种新型血红蛋白/氧化铁复合材料（Hb/FeO），用于从水溶液中去除不同的染料（靛蓝胭脂红、萘酚蓝黑、酒石黄、赤藓红、铬黑 T 和溴酚蓝）。使用扫描电子显微镜（SEM）、激光衍射粒度分析、FT-IR 光谱、等电点测定和热重分析（TGA）对 Hb/FeO 复合材料进行了表征。Hb/FeO 复合材料对所有研究的不同类别的染料均表现出高去除效率，吸附机制主要受静电相互作用支配。吸附遵循准二级动力学模型和 Langmuir 等温线。所有染料的 Langmuir 单层吸附容量范围为 80 至 178 mg/g。Hb/FeO 复合材料的另一个优点是可以很容易地用外部磁铁从水悬浮液中分离出来。还证明了制备的 Hb/FeO 复合材料的稳定性。
