用于增强从水溶液中回收铂（IV）的功能化生物聚合物。

Functionalized Biopolymer for Enhanced Pt(IV) Recovery from Aqueous Solutions.

作者信息

Babău Theodora, Ciopec Mihaela, Mosoarca Giannin, Vancea Cosmin, Negrea Adina, Nemeş Nicoleta Sorina, Pascu Bogdan, Negrea Petru, Ianăşi Catalin, Buzatu Alina Ramona

机构信息

Faculty of Chemical Engineering, Biotechnologies and Environmental Protection, Politehnica University Timisoara, Victoriei Square, no. 2, 300006 Timisoara, Romania.

Renewable Energy Research Institute-ICER, Politehnica University Timişoara, Gavril Musicescu Street, no. 138, 300774 Timisoara, Romania.

出版信息

Polymers (Basel). 2025 Apr 22;17(9):1132. doi: 10.3390/polym17091132.

DOI:10.3390/polym17091132

PMID:40362916

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12073178/

Abstract

In this study, chitosan (Chi) functionalized with the amino acid serine (Ser) was synthesized for the adsorption-based recovery of Pt(IV) from aqueous solutions. To identify the active functional groups of the amino acid and the support material, the synthesized adsorbent was characterized using SEM, FT-IR, and EDX analyses, and its point of zero charge (pH) was determined. Static and dynamic adsorption studies were conducted to optimize process parameters. Under static conditions, equilibrium studies established the maximum Pt(IV) concentration that could be adsorbed onto Chi-Ser, as well as its maximum adsorption capacity. At pH > 4, with an S-L ratio of 0.1 g:25 mL Pt(IV) solution, a contact time of 90 min, and a temperature of 298 K, the maximum adsorption capacity reached 7.23 mg/g. The adsorption process was best described by the Sips isotherm. The Taguchi method was employed to optimize static adsorption conditions. The Clark equation most accurately modeled the adsorption process under dynamic conditions. Additionally, multiple adsorption-desorption cycles evaluated the adsorbent's reusability.

摘要

在本研究中，合成了用氨基酸丝氨酸（Ser）功能化的壳聚糖（Chi），用于从水溶液中基于吸附回收Pt(IV)。为了确定氨基酸和载体材料的活性官能团，使用扫描电子显微镜（SEM）、傅里叶变换红外光谱（FT-IR）和能谱分析（EDX）对合成的吸附剂进行了表征，并测定了其零电荷点（pH）。进行了静态和动态吸附研究以优化工艺参数。在静态条件下，平衡研究确定了可吸附到Chi-Ser上的最大Pt(IV)浓度及其最大吸附容量。在pH > 4、固液比为0.1 g:25 mL Pt(IV)溶液、接触时间为90分钟且温度为298 K的条件下，最大吸附容量达到7.23 mg/g。吸附过程用Sips等温线描述最为合适。采用田口方法优化静态吸附条件。克拉克方程最准确地模拟了动态条件下的吸附过程。此外，多次吸附-解吸循环评估了吸附剂的可重复使用性。