Copper ion removal from dilute solutions using ultrasonically synthesised BSA- and EWP-coated air bubbles

Nazari, Amir Mohammad; Cox, Phil; Waters, Kristian E.

dc.contributor.author	Nazari, Amir Mohammad
dc.contributor.author	Cox, Phil
dc.contributor.author	Waters, Kristian E.
dc.date.accessioned	2017-06-08T10:53:18Z
dc.date.available	2017-06-08T10:53:18Z
dc.date.issued	2014-05-27
dc.identifier.citation	Copper ion removal from dilute solutions using ultrasonically synthesised BSA- and EWP-coated air bubbles 2014, 132:218 Separation and Purification Technology
dc.identifier.issn	1383-5866
dc.identifier.doi	10.1016/j.seppur.2014.05.025
dc.identifier.uri	http://hdl.handle.net/2436/620505
dc.description.abstract	The aim of this study was to remove copper ions from dilute copper solution using an innovative material known as air-filled emulsion (AFE). AFE is composed of microscopic bubbles enclosed by a thin film of cysteine-rich protein distributed through the aqueous solution. The method using AFE as an extractant is combination of air-assisted solvent extraction (AASX) and biosorption techniques. The data obtained from X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FTIR) clearly showed the thiol, amino and carboxylic groups of bovine serum albumin (BSA) and egg white protein (EWP)-coated bubbles being responsible for copper adsorption. Moreover, it was also observed that manipulation of experimental conditions such as solution pH, temperature, biosorbent and copper concentration had a significant impact on copper ion uptake. Higher solution pH led to a greater metal uptake for both egg white protein emulsion (EWPEM) and bovine serum albumin emulsion (BSAEM). At lower pH, copper removal diminished and no copper removal was obtained at pH 2 due to the high concentration of hydrogen ions. The increase of copper uptake with temperature rise was due to both the exposure of more functional groups that were initially buried in the interior of the protein structure and an increase in reaction kinetics.
dc.language.iso	en
dc.publisher	Elsevier
dc.relation.url	http://linkinghub.elsevier.com/retrieve/pii/S1383586614003116
dc.subject	Heavy metal removal
dc.subject	Emulsion
dc.subject	Cysteine protein
dc.subject	Sonochemistry
dc.subject	Biosorption
dc.title	Copper ion removal from dilute solutions using ultrasonically synthesised BSA- and EWP-coated air bubbles
dc.type	Journal article
dc.identifier.journal	Separation and Purification Technology
dc.date.accepted	2014-05-17
refterms.dateFOA	2020-05-19T12:45:59Z
html.description.abstract	The aim of this study was to remove copper ions from dilute copper solution using an innovative material known as air-filled emulsion (AFE). AFE is composed of microscopic bubbles enclosed by a thin film of cysteine-rich protein distributed through the aqueous solution. The method using AFE as an extractant is combination of air-assisted solvent extraction (AASX) and biosorption techniques. The data obtained from X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FTIR) clearly showed the thiol, amino and carboxylic groups of bovine serum albumin (BSA) and egg white protein (EWP)-coated bubbles being responsible for copper adsorption. Moreover, it was also observed that manipulation of experimental conditions such as solution pH, temperature, biosorbent and copper concentration had a significant impact on copper ion uptake. Higher solution pH led to a greater metal uptake for both egg white protein emulsion (EWPEM) and bovine serum albumin emulsion (BSAEM). At lower pH, copper removal diminished and no copper removal was obtained at pH 2 due to the high concentration of hydrogen ions. The increase of copper uptake with temperature rise was due to both the exposure of more functional groups that were initially buried in the interior of the protein structure and an increase in reaction kinetics.