View in EDS

Leaching kinetics of waste pharmaceutical blister package aluminium in phosphoric acid media.

Saved in:
Bibliographic Details
Title: Leaching kinetics of waste pharmaceutical blister package aluminium in phosphoric acid media.
Authors: Shukla, Sugam1 (AUTHOR), Chernyaev, Alexander1 (AUTHOR), Lundström, Mari1 (AUTHOR) mari.lundstrom@aalto.fi
Source: Separation & Purification Technology. Nov2024, Vol. 348, pN.PAG-N.PAG. 1p.
Subjects: Chemical kinetics, Aluminum phosphate, Aluminum recycling, Circular economy, Phosphoric acid
Abstract: • Utilizing phosphoric acid medium for recycling aluminium from waste pharmaceutical blister packages. • Research examining varying acid concentrations, temperatures, hydrogen peroxide amounts, and solid–liquid ratios. • Optimal leaching conditions identified as 1.0 M phosphoric acid, 60 °C temperature, and 1.25 vol% hydrogen peroxide. • Achieved approximately 100% aluminium extraction in just 4 h. This study investigated the process of treating secondary aluminium recovered from waste pharmaceutical blister packages (WPBs) using phosphoric acid solutions as a potential strategy for recycling this currently non-recycled waste material. The findings indicate that, when recycling via the hydrometallurgical process, the aluminium passivated during leaching can be effectively counteracted by employing moderately concentrated phosphoric acid solutions (1.0 M), elevated temperatures (60–80 °C) and specifically the addition of H 2 O 2 (1.25–2.5 vol.%). Under these conditions, complete extraction of aluminium was achieved within four hours. The estimated activation energy (∼82 kJ/mol) indicates that the leaching reaction is primarily limited by the chemical reaction rate rather than film diffusion. An aluminium phosphate solution could be obtained by leaching WPBs in a way that is suitable for subsequent aluminium phosphate crystallisation. This approach could provide a promising pathway for valorising aluminium from the currently under-utilised waste fraction of pharmaceutical blister packages. [ABSTRACT FROM AUTHOR]
Copyright of Separation & Purification Technology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:• Utilizing phosphoric acid medium for recycling aluminium from waste pharmaceutical blister packages. • Research examining varying acid concentrations, temperatures, hydrogen peroxide amounts, and solid–liquid ratios. • Optimal leaching conditions identified as 1.0 M phosphoric acid, 60 °C temperature, and 1.25 vol% hydrogen peroxide. • Achieved approximately 100% aluminium extraction in just 4 h. This study investigated the process of treating secondary aluminium recovered from waste pharmaceutical blister packages (WPBs) using phosphoric acid solutions as a potential strategy for recycling this currently non-recycled waste material. The findings indicate that, when recycling via the hydrometallurgical process, the aluminium passivated during leaching can be effectively counteracted by employing moderately concentrated phosphoric acid solutions (1.0 M), elevated temperatures (60–80 °C) and specifically the addition of H 2 O 2 (1.25–2.5 vol.%). Under these conditions, complete extraction of aluminium was achieved within four hours. The estimated activation energy (∼82 kJ/mol) indicates that the leaching reaction is primarily limited by the chemical reaction rate rather than film diffusion. An aluminium phosphate solution could be obtained by leaching WPBs in a way that is suitable for subsequent aluminium phosphate crystallisation. This approach could provide a promising pathway for valorising aluminium from the currently under-utilised waste fraction of pharmaceutical blister packages. [ABSTRACT FROM AUTHOR]
ISSN:13835866
DOI:10.1016/j.seppur.2024.127760