Polymers and Pigments Department, National Research Centre, 33 El Bohouth St., Dokki, Giza, P.O. 12622, Egypt.
Packaging Materials Department, National Research Centre, 33 El Bohouth St. (former El Tahrir St.), Dokki, Giza, P.O. 12622, Egypt.
Carbohydr Polym. 2023 Apr 1;305:120571. doi: 10.1016/j.carbpol.2023.120571. Epub 2023 Jan 10.
Wastewater rich in heavy metals and organic compounds represents one of the essential environmental pollutants. Therefore, a practical approach is to fabricate eco-friendly polymer-based systems with a high ability to absorb pollutants. Herein, bionanocomposites consisting of chitosan (Cs) grafted by various monomers, such as acrylamide (Am), acrylic acid (AA), and 4-styrene sulfonic acid (SSA), and hybrid nanoparticles of graphene oxide/titanium dioxide nanoparticles (GO@TiO-NPs) were fabricated. The prepared nanomaterials and bionanocomposites characterized via various tools. The data illustrated that the prepared GO had a thickness of 10 nm and TiO-NPs had a diameter of 25 nm. In addition, the grafted chitosan (gCs) using Am and SSA had the largest surface area (gCs2; 22.89 nm) and its bionanocomposite (NC5; 104.79 nm). In addition, the sorption ability of the 0.15 g of prepared bionanocomposites to the (100 mg/L) of lead ions (Pb) and (25 mg/L) of basic-red 46 (BR46) under various conditions has been studied. The results showed that gCs3 and NC5 had the highest adsorption of Pb (79.54 %) and BR46 (79.98 %), respectively. The kinetic study results of the sorbents obeyed the Pseudo second-order model. In contrast, the isothermal study followed the Freundlich adsorption model for Pb and the Langmuir adsorption model for BR46.
富含重金属和有机化合物的废水是主要的环境污染物之一。因此，一种实用的方法是制备具有高吸附污染物能力的环保型聚合物基系统。在此，制备了壳聚糖（Cs）接枝各种单体（如丙烯酰胺（Am）、丙烯酸（AA）和 4-苯乙烯磺酸（SSA））的生物纳米复合材料和氧化石墨烯/二氧化钛纳米粒子（GO@TiO-NPs）的杂化纳米粒子。通过各种工具对制备的纳米材料和生物纳米复合材料进行了表征。数据表明，制备的 GO 的厚度为 10nm，TiO-NPs 的直径为 25nm。此外，用 Am 和 SSA 接枝的壳聚糖（gCs）具有最大的表面积（gCs2；22.89nm），其生物纳米复合材料（NC5；104.79nm）。此外，还研究了在不同条件下，制备的 0.15g 生物纳米复合材料对（100mg/L）铅离子（Pb）和（25mg/L）碱性红 46（BR46）的吸附能力。结果表明，gCs3 和 NC5 对 Pb（79.54%）和 BR46（79.98%）的吸附率最高。吸附剂的动力学研究结果符合伪二级模型。相比之下，等温研究遵循 Freundlich 吸附模型用于 Pb 和 Langmuir 吸附模型用于 BR46。
