Extraction of Lead Ions and Partitioning Behaviour in Aqueous Biphasic Systems Based on Polyethylene Glycol and Different Salts

Aunnankat, Kridsada and Pancharoen, Ura and Kiatkittipong, Worapon and Mali Hunsom, Mali and Aiouache, Farid and Najdanovic‐Visak, Vesna and Ramakul, Prakorn (2024) Extraction of Lead Ions and Partitioning Behaviour in Aqueous Biphasic Systems Based on Polyethylene Glycol and Different Salts. Journal of Chemical and Engineering Data. ISSN 0021-9568

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Abstract

Lead ions are environmental pollutants often present in very low concentrations, which makes them difficult to detect and, thus, present problems for environmental monitoring. In this study, we examined the performance of aqueous biphasic systems based on polyethylene glycol (PEG, molecular mass of 4000 g mol1) with ammonium sulphate (NH4)2SO4, magnesium sulphate (MgSO4), sodium sulphate (Na2SO4) and trisodium citrate (Na3C6H5O7) for the separation of lead (II) ions from aqueous solutions. We investigated the effects of salt types and the ratio of PEG4000 to salt on the extraction efficiency of lead (II) removal at constant temperatures of 303 K and 0.1 MPa. Additionally, we determined the cloud points (solubility equilibrium curve) and tie-lines for four ternary systems comprising PEG4000, water, and salt (either (NH4)2SO4, MgSO4, Na2SO4, or Na3C6H5O7) under the same conditions. A maximum lead (II) extraction efficiency of 74.4% was achieved using the PEG4000/(NH4)2SO4 system with a mass fraction ratio of PEG4000 to (NH4)2SO4 of 0.2:0.12. This outcome highlights the significant potential of utilizing aqueous biphasic systems based on PEG4000 to separate lead (II) from aqueous solutions efficiently.

Item Type:
Journal Article
Journal or Publication Title:
Journal of Chemical and Engineering Data
Uncontrolled Keywords:
Research Output Funding/yes_externally_funded
Subjects:
?? yes - externally fundedgeneral chemical engineeringgeneral chemistrychemical engineering(all)chemistry(all) ??
ID Code:
213092
Deposited By:
Deposited On:
18 Jan 2024 00:29
Refereed?:
Yes
Published?:
Published
Last Modified:
24 Aug 2024 23:56