修饰后的 Mn 铁氧体纳米颗粒@Zn-Al 层状双氢氧化物@纤维素@活性生物炭纳米复合材料用于高效修复亚甲基蓝和汞（II）。
Decorated Mn-ferrite nanoparticle@Zn-Al layered double hydroxide@Cellulose@ activated biochar nanocomposite for efficient remediation of methylene blue and mercury (II).
机构信息
Faculty of Sciences, Chemistry Department, Alexandria University, Moharem Bey, Alexandria, Egypt.
Department of Chemistry, Turabah University College, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia.
出版信息
Bioresour Technol. 2021 Dec;342:126029. doi: 10.1016/j.biortech.2021.126029. Epub 2021 Sep 25.
An innovative magnetic nanocomposite was designed and fabricated by the functionalization and support of magnetic Mn-ferrite nanoparticle (MnFeO) with layered double hydroxide (Zn-Al LDHs) on cellulose and activated grapes stalks-derived biochar (AGB) (MnFeO@Zn-Al LDHs@Cel@AGB), to incorporate active functionalities and fantastic features with the aim to explore its feasibility for removal of harmful cationic species as methylene blue dye (MB) and mercury ions from wastewater. Structural, composition, morphological, surface area, adsorption performance of the fabricated nanocomposite toward both MB and Hg(II) and reusability were also investigated. The results referred that 10 mg ofthe nanocomposite exhibited 97.4% and 84.0 % removal efficiency of 10mgL MB dye and 0.1 mol L Hg(II) at 25 and 30 min contact times, respectively. Adsorption isotherms and kinetics of the two pollutants (MB and Hg(II)) were both governed by the pseudo-second-order equation with possible participation of intraparticle diffusion mechanism.
设计并制备了一种创新性的磁性纳米复合材料，通过磁性 Mn 铁氧体纳米颗粒（MnFeO）的功能化和支撑，将其负载到纤维素和活化葡萄秸秆衍生生物炭（AGB）上的层状双氢氧化物（Zn-Al LDHs）上（MnFeO@Zn-Al LDHs@Cel@AGB），将活性功能和独特特性结合起来，以探索其从废水中去除有害阳离子物种（如亚甲基蓝染料（MB）和汞离子）的可行性。还研究了制备的纳米复合材料对 MB 和 Hg(II) 的结构、组成、形态、表面积、吸附性能以及可重复使用性。结果表明，在 25 和 30 分钟的接触时间下，10 mg 的纳米复合材料对 10 mg L 的 MB 染料和 0.1 mol L 的 Hg(II) 的去除效率分别达到 97.4%和 84.0%。两种污染物（MB 和 Hg(II)）的吸附等温线和动力学均由准二级方程控制，可能存在颗粒内扩散机制的参与。
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