A Triazine Membrane for Sustainable Acquisition of Au(III) from Wastewater

Ge Shang; Haonan Dong; Yi Zhang; Conghuan Zhang; Ting Chen; Yunhua He; Hongxing He; Weili Li; Xiujun Deng; Zhifeng Nie; Sibiao Zhao

doi:10.3390/molecules29092051

Molecules (Apr 2024)

A Triazine Membrane for Sustainable Acquisition of Au(III) from Wastewater

Ge Shang,
Haonan Dong,
Yi Zhang,
Conghuan Zhang,
Ting Chen,
Yunhua He,
Hongxing He,
Weili Li,
Xiujun Deng,
Zhifeng Nie,
Sibiao Zhao

Affiliations

Ge Shang: Yunnan Key Laboratory of Metal-Organic Molecular Materials and Device, School of Chemistry and Chemical Engineering, Kunming University, Kunming 650214, China
Haonan Dong: Yunnan Key Laboratory of Metal-Organic Molecular Materials and Device, School of Chemistry and Chemical Engineering, Kunming University, Kunming 650214, China
Yi Zhang: Yunnan Key Laboratory of Metal-Organic Molecular Materials and Device, School of Chemistry and Chemical Engineering, Kunming University, Kunming 650214, China
Conghuan Zhang: Yunnan Key Laboratory of Metal-Organic Molecular Materials and Device, School of Chemistry and Chemical Engineering, Kunming University, Kunming 650214, China
Ting Chen: Yunnan Key Laboratory of Metal-Organic Molecular Materials and Device, School of Chemistry and Chemical Engineering, Kunming University, Kunming 650214, China
Yunhua He: Yunnan Key Laboratory of Metal-Organic Molecular Materials and Device, School of Chemistry and Chemical Engineering, Kunming University, Kunming 650214, China
Hongxing He: Yunnan Key Laboratory of Metal-Organic Molecular Materials and Device, School of Chemistry and Chemical Engineering, Kunming University, Kunming 650214, China
Weili Li: Yunnan Key Laboratory of Metal-Organic Molecular Materials and Device, School of Chemistry and Chemical Engineering, Kunming University, Kunming 650214, China
Xiujun Deng: Yunnan Key Laboratory of Metal-Organic Molecular Materials and Device, School of Chemistry and Chemical Engineering, Kunming University, Kunming 650214, China
Zhifeng Nie: Yunnan Key Laboratory of Metal-Organic Molecular Materials and Device, School of Chemistry and Chemical Engineering, Kunming University, Kunming 650214, China
Sibiao Zhao: Kunming Institute for Food and Drug Control, Kunming 650034, China

DOI: https://doi.org/10.3390/molecules29092051
Journal volume & issue: Vol. 29, no. 9
p. 2051

Abstract

Read online

The recovery of Au(III) from solution using adsorbents in the form of granules or powders is challenging due to issues such as instability during the recovery process or mass loss caused by small particle size. This study introduces a PEI-TCT/PVDF composite membrane designed to intercept and capture Au(III) in wastewater. Experimental results demonstrated that the PEI-TCT/PVDF membrane exhibits a broad pH range (1–8) and a high retention efficiency for Au(III) of 97.8%, with a maximum adsorption capacity of 294.5 mg/g. The mechanism of Au(III) adsorption on the PEI-TCT/PVDF membrane was mainly through electrostatic adsorption, which caused AuCl4− to aggregate on the surface of the membrane and gradually reduced to Au0 and Au+. Furthermore, the membrane can be entirely regenerated within 20 min and maintains its performance in subsequent adsorption cycles. This study highlights the potential of PEI-TCT/PVDF membranes for the recovery of precious Au(III).

Published in Molecules

ISSN: 1420-3049 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry: Organic chemistry
Website: http://www.mdpi.com/journal/molecules

About the journal

Abstract

Keywords