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Selective extraction of palladium from simulated liquid waste solution by emulsion liquid membrane process using D2EHPA as a mobile carrier

Othman, Norasikin and Mohamed Noah, Norul Fatiha and Harruddin, Norlisa and Abdullah, Nurul Ashida and Bachok, Siti Khadijah (2014) Selective extraction of palladium from simulated liquid waste solution by emulsion liquid membrane process using D2EHPA as a mobile carrier. Jurnal Teknologi (Sciences and Engineering), 69 (9). pp. 1-4. ISSN 0127-9696

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Official URL: http://dx.doi.org/10.11113/jt.v69.3386

Abstract

Liquid semiconductor waste has become a serious problem to the environment due to the toxicity of heavy metals in the wastewater. However the monetary value of precious metals such as gold, silver and palladium has become a great concern nowadays. Therefore this study is investigating the recovery of palladium by emulsion liquid membrane (ELM) process using di-(2-ethylhexyl) phosphoric acid (D2EHPA) as a carrier. The important parameters affecting the extraction of palladium such as concentrations of carrier and stripping agents, extraction time and treat ratio were investigate. This experiment was conducted using a mixer-settler in a batch system. The results showed that more than 90% of palladium was extracted using 0.05M D2EHPA, 0.1 M H2SO4 as a stripping agent, 5 minutes extraction time, and 1:3 treat ratio. However, the study on emulsion stability showed unstable results due to the leakage and swelling occurrence during the extraction process. As a conclusion, the research shows that ELM has the potential to extract palladium from simulated waste solution using D2EHPA as a mobile carrier.

Item Type:Article
Uncontrolled Keywords:extraction, palladium
Subjects:T Technology > TP Chemical technology
Divisions:Chemical Engineering
ID Code:62547
Deposited By: Widya Wahid
Deposited On:18 Jun 2017 06:12
Last Modified:18 Jun 2017 06:12

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