Abstract
Adsorption of myoglobin (Mb), bovine serum albumin (BSA) and γ-globulin (GG) onto activated carbons (ACs) with different pore size distributions, and poly(vinyl alcohol) (PVA) monolithic cryogels containing AC particles was studied. The highest initial rate of Mb adsorption was observed for AC having the largest specific surface area (1939 m2 g -1) and pore volume (1.82 cm3 g-1). The adsorption kinetics of proteins was characterized by a bimodal shape of the distribution f(D) function of an effective diffusion coefficient. Adsorption isotherms of Mb and GG were of Freundlich type within the studied range of equilibrium concentrations (10-150 μg mL-1). The distributions of free energy of protein adsorption were bimodal and reflected both interactions with carbon surfaces and self-association of proteins. Adsorbed amounts of Mb were the highest among the proteins studied (up to 700 mg g-1 carbon), which was attributed to the higher fraction of pores accessible for Mb. Incorporation of carbon particles into PVA-based cryogel resulted in macroporous monolithic composite materials (AC-PVA) exhibiting good flow-through properties. Scanning electron microscopy of the composites showed macroporous aggregates of carbon particles held together by films and bridges of PVA. The rates of adsorption and adsorbed amounts of proteins on AC-PVA were reduced compared to the pristine carbon and depended on the carbon content in the composites. Nevertheless, adsorption of Mb on AC-PVA took place even in the presence of 500-fold higher concentration of BSA. This indicated a possibility of Mb clearance from blood plasma using the PVA-carbon monoliths.
| Original language | English |
|---|---|
| Pages (from-to) | 16267-16278 |
| Number of pages | 12 |
| Journal | Physical Chemistry Chemical Physics |
| Volume | 14 |
| Issue number | 47 |
| DOIs | |
| Publication status | Published - Dec 14 2012 |
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ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Physics and Astronomy(all)
Cite this
Activated carbons and carbon-containing poly(vinyl alcohol) cryogels : Characterization, protein adsorption and possibility of myoglobin clearance. / Ivanov, Alexander E.; Kozynchenko, Oleksandr P.; Mikhalovska, Lyuba I.; Tennison, Stephen R.; Jungvid, Hans; Gun'Ko, Vladimir M.; Mikhalovsky, Sergey V.
In: Physical Chemistry Chemical Physics, Vol. 14, No. 47, 14.12.2012, p. 16267-16278.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Activated carbons and carbon-containing poly(vinyl alcohol) cryogels
T2 - Characterization, protein adsorption and possibility of myoglobin clearance
AU - Ivanov, Alexander E.
AU - Kozynchenko, Oleksandr P.
AU - Mikhalovska, Lyuba I.
AU - Tennison, Stephen R.
AU - Jungvid, Hans
AU - Gun'Ko, Vladimir M.
AU - Mikhalovsky, Sergey V.
PY - 2012/12/14
Y1 - 2012/12/14
N2 - Adsorption of myoglobin (Mb), bovine serum albumin (BSA) and γ-globulin (GG) onto activated carbons (ACs) with different pore size distributions, and poly(vinyl alcohol) (PVA) monolithic cryogels containing AC particles was studied. The highest initial rate of Mb adsorption was observed for AC having the largest specific surface area (1939 m2 g -1) and pore volume (1.82 cm3 g-1). The adsorption kinetics of proteins was characterized by a bimodal shape of the distribution f(D) function of an effective diffusion coefficient. Adsorption isotherms of Mb and GG were of Freundlich type within the studied range of equilibrium concentrations (10-150 μg mL-1). The distributions of free energy of protein adsorption were bimodal and reflected both interactions with carbon surfaces and self-association of proteins. Adsorbed amounts of Mb were the highest among the proteins studied (up to 700 mg g-1 carbon), which was attributed to the higher fraction of pores accessible for Mb. Incorporation of carbon particles into PVA-based cryogel resulted in macroporous monolithic composite materials (AC-PVA) exhibiting good flow-through properties. Scanning electron microscopy of the composites showed macroporous aggregates of carbon particles held together by films and bridges of PVA. The rates of adsorption and adsorbed amounts of proteins on AC-PVA were reduced compared to the pristine carbon and depended on the carbon content in the composites. Nevertheless, adsorption of Mb on AC-PVA took place even in the presence of 500-fold higher concentration of BSA. This indicated a possibility of Mb clearance from blood plasma using the PVA-carbon monoliths.
AB - Adsorption of myoglobin (Mb), bovine serum albumin (BSA) and γ-globulin (GG) onto activated carbons (ACs) with different pore size distributions, and poly(vinyl alcohol) (PVA) monolithic cryogels containing AC particles was studied. The highest initial rate of Mb adsorption was observed for AC having the largest specific surface area (1939 m2 g -1) and pore volume (1.82 cm3 g-1). The adsorption kinetics of proteins was characterized by a bimodal shape of the distribution f(D) function of an effective diffusion coefficient. Adsorption isotherms of Mb and GG were of Freundlich type within the studied range of equilibrium concentrations (10-150 μg mL-1). The distributions of free energy of protein adsorption were bimodal and reflected both interactions with carbon surfaces and self-association of proteins. Adsorbed amounts of Mb were the highest among the proteins studied (up to 700 mg g-1 carbon), which was attributed to the higher fraction of pores accessible for Mb. Incorporation of carbon particles into PVA-based cryogel resulted in macroporous monolithic composite materials (AC-PVA) exhibiting good flow-through properties. Scanning electron microscopy of the composites showed macroporous aggregates of carbon particles held together by films and bridges of PVA. The rates of adsorption and adsorbed amounts of proteins on AC-PVA were reduced compared to the pristine carbon and depended on the carbon content in the composites. Nevertheless, adsorption of Mb on AC-PVA took place even in the presence of 500-fold higher concentration of BSA. This indicated a possibility of Mb clearance from blood plasma using the PVA-carbon monoliths.
UR - http://www.scopus.com/inward/record.url?scp=84869414539&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84869414539&partnerID=8YFLogxK
U2 - 10.1039/c2cp42869e
DO - 10.1039/c2cp42869e
M3 - Article
VL - 14
SP - 16267
EP - 16278
JO - Physical Chemistry Chemical Physics
JF - Physical Chemistry Chemical Physics
SN - 1463-9076
IS - 47
ER -