Graduate Program in Water Resources and Environmental Sanitation, Hydraulic Research Institute (IPH), Federal University of Rio Grande do Sul (UFRGS), Porto Alegre 91501-970, RS, Brazil.
Environmental Science Graduate Program, Engineering Center, Federal University of 8 Pelotas (UFPel), 989 Benjamin Constant St., Pelotas 96010-020, RS, Brazil.
Molecules. 2023 Jun 6;28(12):4591. doi: 10.3390/molecules28124591.
This paper proposes an easy and sustainable method to prepare high-sorption capacity biobased adsorbents from wood waste. A biomass wood waste (spruce bark) was employed to fabricate a composite doped with Si and Mg and applied to adsorb an emerging contaminant (Omeprezole) from aqueous solutions, as well as synthetic effluents loaded with several emerging contaminants. The effects of Si and Mg doping on the biobased material's physicochemical properties and adsorptive performance were evaluated. Si and Mg did not influence the specific surface area values but impacted the presence of the higher number of mesopores. The kinetic and equilibrium data presented the best fitness by the Avrami Fractional order (AFO) and Liu isotherm models, respectively. The values of Q ranged from 72.70 to 110.2 mg g (BP) and from 107.6 to 249.0 mg g (BTM). The kinetic was faster for Si/Mg-doped carbon adsorbent, possibly due to different chemical features provoked by the doping process. The thermodynamic data showed that the adsorption of OME on biobased adsorbents was spontaneous and favorable at four studied temperatures (283, 293, 298, 303, 308, 313, and 318 K), with the magnitude of the adsorption correspondent to a physical adsorption process (ΔH° < 2 kJ mol). The adsorbents were applied to treat synthetic hospital effluents and exhibited a high percentage of removal (up to 62%). The results of this work show that the composite between spruce bark biomass and Si/Mg was an efficient adsorbent for OME removal. Therefore, this study can help open new strategies for developing sustainable and effective adsorbents to tackle water pollution.
本文提出了一种从木质废料中制备高吸附容量生物基吸附剂的简便可持续方法。采用生物质木质废料（云杉树皮）制备了一种掺杂 Si 和 Mg 的复合材料，并将其应用于从水溶液以及负载有几种新兴污染物的合成废水中吸附新兴污染物（奥美拉唑）。研究了 Si 和 Mg 掺杂对生物基材料物理化学性质和吸附性能的影响。Si 和 Mg 不影响比表面积值，但会影响存在的中孔数量。动力学和平衡数据分别通过 Avrami 分数阶（AFO）和 Liu 等温线模型呈现出最佳拟合。Q 值范围为 72.70 至 110.2 mg g（BP）和 107.6 至 249.0 mg g（BTM）。Si/Mg 掺杂碳吸附剂的动力学更快，这可能是由于掺杂过程引起的不同化学特征所致。热力学数据表明，OME 在生物基吸附剂上的吸附在四个研究温度（283、293、298、303、308、313 和 318 K）下是自发和有利的，吸附的大小对应于物理吸附过程（ΔH° < 2 kJ mol）。吸附剂被用于处理合成医院废水，表现出高去除率（高达 62%）。这项工作的结果表明，云杉树皮生物质与 Si/Mg 的复合材料是一种用于去除 OME 的有效吸附剂。因此，这项研究可以帮助为开发可持续和有效的吸附剂以应对水污染开辟新的策略。
