AI Article Synopsis
- The recovery of Au(III) from wastewater is challenging due to instability and mass loss from traditional adsorbents like granules or powders.
- This research presents a PEI-TCT/PVDF composite membrane that efficiently captures Au(III) at a high retention rate of 97.8% across a pH range of 1-8 and has a significant adsorption capacity of 294.5 mg/g.
- The membrane's adsorption mechanism mainly relies on electrostatic forces, allowing it to aggregate Au(III) effectively, and it can be fully regenerated in just 20 minutes for multiple uses.
Article Abstract
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 AuCl to aggregate on the surface of the membrane and gradually reduced to Au 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).
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11085286 | PMC |
| http://dx.doi.org/10.3390/molecules29092051 | DOI Listing |
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