Department of Chemistry, University of the Free State, Bloemfontein, South Africa.
Department of Pure and Industrial Chemistry, University of Nigeria, Nsukka, Nigeria.
Sci Rep. 2020 Sep 2;10(1):14441. doi: 10.1038/s41598-020-71261-x.
Despite the efficiency of ZnO nanoparticle (NPs) composite adsorbents in the adsorption of various pollutants, there is presently no report on the combo of ZnONPs with biomass for adsorption. Besides, there is a dearth of information on the biosorption of celestine blue (CEB), a dye used in the nuclear and textile industry. In this study, biogenic-chemically mediated synthesis of a composite (ZnO@ACP) was prepared by the impregnation of ZnONPs onto Ananas comosus waste (ACP) for the adsorption of CEB. The SEM, EDX, FTIR, XRD, BET, and TGA characterizations showed the successful presence of ZnONPs on the biomass to form a nanocomposite. The uptake of CEB was enhanced by the incorporation of ZnONPs on ACP. A faster CEB adsorption onto ZnO@ACP (120 min) compared to ACP (160 min) was observed. The Langmuir (R > 0.9898) and pseudo-second-order (R > 0.9518) models were most appropriate in the description of the adsorption process. The impregnation of ZnONPs onto the biomass enhanced the spontaneity of the process and displayed endothermic characteristics. High CEB desorption of 81.3% from the dye loaded ZnO@ACP as well as efficient reusability showed the efficacy of the prepared nanocomposite for CEB adsorption.
尽管氧化锌纳米粒子（NPs）复合材料吸附剂在吸附各种污染物方面具有高效性，但目前尚无将 ZnONPs 与生物质结合用于吸附的报道。此外，关于 Celestine Blue（CEB）的生物吸附信息也很少，CEB 是一种用于核工业和纺织工业的染料。在本研究中，通过将 ZnONPs 浸渍到菠萝渣（ACP）上来制备生物化学介导合成的复合材料（ZnO@ACP），用于吸附 CEB。SEM、EDX、FTIR、XRD、BET 和 TGA 表征表明，ZnONPs 成功地存在于生物质上形成纳米复合材料。在 ACP 上掺入 ZnONPs 提高了 CEB 的吸附能力。与 ACP（160 分钟）相比，CEB 更快地被 ZnO@ACP（120 分钟）吸附。Langmuir（R>0.9898）和拟二级（R>0.9518）模型最适合描述吸附过程。将 ZnONPs 浸渍到生物质上增强了该过程的自发性，并显示出吸热特性。从负载 CEB 的 ZnO@ACP 中解吸 81.3%的高 CEB 以及高效的可重复使用性表明，所制备的纳米复合材料对 CEB 吸附具有良好的效果。
