Efficient recycle of palladium from wastewater by modified fumed nano-silica composites: Synthesis, adsorption, kinetics and mechanisms

IF 3.7 3区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Research & Design Pub Date : 2025-02-01 DOI:10.1016/j.cherd.2024.12.034

Yan Li, Sisi Tang, Hang Lei, Yuxia Zhong, Yue-Fei Zhang

{"title":"Efficient recycle of palladium from wastewater by modified fumed nano-silica composites: Synthesis, adsorption, kinetics and mechanisms","authors":"Yan Li, Sisi Tang, Hang Lei, Yuxia Zhong, Yue-Fei Zhang","doi":"10.1016/j.cherd.2024.12.034","DOIUrl":null,"url":null,"abstract":"<div><div>In this paper, two adsorbents based on hydrophilic and hydrophobic fumed silica carriers for efficient recovery of palladium were prepared using 1,4,7,10-tetraazacyclododecane as a functional group. These functional adsorbents were characterized by FT-IR, SEM and BET. The effects of pH (2−6), contact time (1–480 min), and temperature (25–55℃) on the adsorption performance were investigated. The concentration of palladium(II) after adsorption was determined by flame atomic absorption spectrometry and the data were analyzed by kinetic, thermodynamic and isotherm fitting. At pH = 4, the adsorption conformed to Pseudo-second-order kinetic model, with rapid adsorption within 2 h and able to reach equilibrium within 5 h. Meanwhile, the Langmuir model was able to better describe the isotherm data, with the maximum adsorption exceeding 140 mg·g<sup>−1</sup>. Moreover, the thermodynamic analysis indicated that the adsorption was a heat-absorbing spontaneous process. The combination of XPS and DFT calculations elucidated the adsorption and desorption mechanisms, emphasized the potential of these adsorbents for the recovery of Pd(II) from aqueous solutions, and contributed to the development of sustainable and effective adsorption technologies.</div></div>","PeriodicalId":10019,"journal":{"name":"Chemical Engineering Research & Design","volume":"214 ","pages":"Pages 166-176"},"PeriodicalIF":3.7000,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chemical Engineering Research & Design","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0263876224007226","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}

引用次数: 0

Abstract

In this paper, two adsorbents based on hydrophilic and hydrophobic fumed silica carriers for efficient recovery of palladium were prepared using 1,4,7,10-tetraazacyclododecane as a functional group. These functional adsorbents were characterized by FT-IR, SEM and BET. The effects of pH (2−6), contact time (1–480 min), and temperature (25–55℃) on the adsorption performance were investigated. The concentration of palladium(II) after adsorption was determined by flame atomic absorption spectrometry and the data were analyzed by kinetic, thermodynamic and isotherm fitting. At pH = 4, the adsorption conformed to Pseudo-second-order kinetic model, with rapid adsorption within 2 h and able to reach equilibrium within 5 h. Meanwhile, the Langmuir model was able to better describe the isotherm data, with the maximum adsorption exceeding 140 mg·g⁻¹. Moreover, the thermodynamic analysis indicated that the adsorption was a heat-absorbing spontaneous process. The combination of XPS and DFT calculations elucidated the adsorption and desorption mechanisms, emphasized the potential of these adsorbents for the recovery of Pd(II) from aqueous solutions, and contributed to the development of sustainable and effective adsorption technologies.

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

Chemical Engineering Research & Design 工程技术-工程：化工

CiteScore

6.10

自引率

7.70%

发文量

623

审稿时长

42 days

期刊介绍： ChERD aims to be the principal international journal for publication of high quality, original papers in chemical engineering. Papers showing how research results can be used in chemical engineering design, and accounts of experimental or theoretical research work bringing new perspectives to established principles, highlighting unsolved problems or indicating directions for future research, are particularly welcome. Contributions that deal with new developments in plant or processes and that can be given quantitative expression are encouraged. The journal is especially interested in papers that extend the boundaries of traditional chemical engineering.