College of Environmental Science and Engineering, China West Normal University, Nanchong, Sichuan 637009, China.
Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China.
Carbohydr Polym. 2022 Jun 15;286:119307. doi: 10.1016/j.carbpol.2022.119307. Epub 2022 Mar 3.
A pyridine-modified chitosan (PMCS) adsorbent with excellent adsorption performance and specific selectivity for Au(III) in wastewater was prepared. FTIR, SEM, XPS and XRD were used to study its adsorption performance, and various models were used to fit and analyze the experimental adsorption data. The maximum adsorption capacity of PMCS for Au(III) is 549.41 mg/g (298 K, pH = 4). The data analysis results prove that the PSO and Langmuir models best describe the adsorption process. Adsorption experiments in the presence of multiple ions proved that PMCS is selective for the adsorption of Au(III). The adsorption and desorption experiments showed that the adsorption rate of PMCS could still reach 94.77% after three cycles. In summary, PMCS was demonstrated to be a high-quality material for the adsorption of Au(III) from wastewater due to its excellent adsorption performance, specific selectivity and reusability.
一种吡啶修饰壳聚糖（PMCS）吸附剂，对废水中的 Au(III) 具有优异的吸附性能和特殊选择性。采用 FTIR、SEM、XPS 和 XRD 研究其吸附性能，并采用各种模型对实验吸附数据进行拟合和分析。PMCS 对 Au(III) 的最大吸附容量为 549.41mg/g（298K，pH=4）。数据分析结果证明，PSO 和 Langmuir 模型最能描述吸附过程。多种离子共存下的吸附实验证明，PMCS 对 Au(III) 的吸附具有选择性。吸附和解吸实验表明，PMCS 在三次循环后吸附率仍可达 94.77%。综上所述，PMCS 因其优异的吸附性能、特殊选择性和可重复使用性，被证明是一种从废水中吸附 Au(III) 的优质材料。
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