Recovery of Indium from Etching Wastewater using Supported Liquid Membrane with Strip Dispersion with Vegetable Oil as Diluent
Journal
Chemical Engineering Transactions
Journal Volume
122
Start Page
367
End Page
372
ISSN
22839216
Date Issued
2025
Author(s)
Abstract
Supported Liquid Membrane with Strip Dispersion (SLMSD) is an effective and cost-efficient method for recovering precious metals. Traditionally, petroleum-based diluents such as kerosene or Isopar-L are employed; however, their use raises environmental and safety concerns. This study investigates sunflower oil, a green and renewable alternative, as a diluent in SLMSD for recovering In3+ from etching waste solution. Results indicate effective Indium recovery using 0.4 M D2EHPA as the extractant with the permeability of In3+ was 9.5 × 10-6 m.min-1. A model-based estimation suggests that 99 % removal of In3+ could be achieved within 1.22 h using a 1.4 m2 membrane. This highlights vegetable oil’s potential as a sustainable diluent in SLMSD applications.
Publisher
Italian Association of Chemical Engineering - AIDIC
Type
journal article