Browsing by Author "Akkaya, Recep"
Now showing items 1-19 of 19
-
Adsorption isotherms, kinetics, thermodynamics and desorption studies for uranium and thorium ions from aqueous solution by novel microporous composite P(HEMA-EP)
Akkaya, Recep; Akkaya, Birnur (ELSEVIER SCIENCE BV, 2013)In this research, a novel composite, poly(2-hydroxyethylmethacrylate-expanded perlite) [P(HEMA-EP)], was synthesized and its adsorptive features were investigated. P(HEMA-EP)'s adsorptive features were evaluated for UO22+ ... -
Adsorptive features of chitosan entrapped in polyacrylamide hydrogel for Pb2+, UO22+, and Th4+
Akkaya, Recep; Ulusoy, Ulvi (ELSEVIER SCIENCE BV, 2008)Chitosan (Ch) was entrapped in polyacrylamide (PAA) by direct polymerization of acrylamide in a suspension of Ch. The adsorptive features of PAA-Ch and Ch were then investigated for pb(2+), UO22+, and Th4+ in view of ... -
Adsorptive features of polyacrylamide-apatite composite for Pb2+, UO22+ and Th4+
Ulusoy, Ulvi; Akkaya, Recep (ELSEVIER SCIENCE BV, 2009)Micro-composite of polyacrylamide (PAA) and apatite (Apt) was prepared by direct polymerization of acrylamide in a suspension of Apt and characterized by means of FT-IR, XRD, SEM and BET analysis. The adsorptive features ... -
Bentonite-acrylamide-histidine-Cu(II) Microcomposite for Cytochrome c Adsorption
Akkaya, Birnur; Akkaya, Recep (ISMITHERS, 2012)Bentonite-acrylamide-histidine with an average particle diameter of 200-1000 mu m was produced by bulk polymerization of bentonite, acrylamide, bisacrylamide, AIBN and histidine. Bentonite-acrylamide-histidine-Cu(II) ... -
Cross-Linked Bentonite-Acrylamide-histidine-Based Metal-Chelate Affinity Microcomposites for Lysozyme Separation From Egg White
Akkaya, Birnur; Akkaya, Recep (TAYLOR & FRANCIS INC, 2012)Among different adsorbents, a new support for immobilized metal affinity chromatography was used for lysozyme separation from egg white. For this purpose, acrylamide, bisacrylamide, bentonite, and L-histidine in the presence ... -
A Crosslinked Carboxylic Acid Containing Cation Exchange Monolithic Cryogel for Human Serum Albumin Separation
Akkaya, Birnur; Akkaya, Recep (TAYLOR & FRANCIS INC, 2012)For this work, we synthesized poly(N-isopropylacrylamide-acrylamide)-acrylic acid (poly(NIPAM-Am)-AAc) monolithic cryogel for a human serum albumin separation (HSA) from a protein mixture (human serum immunoglobulin, human ... -
Effects of pH, concentration and temperature on radionuclides sorption onto polyhydroxyethyl methacrylate-expanded perlite composite
Akkaya, Recep (SPRINGER, 2013)Poly (hydroxyethylmethacrylate-expanded perlite) [P(HEMA-EP)], was synthesized and its adsorptive features were investigated for natural radionuclides (TI+, Ra2+, Bi3+, Ac3+ and Pb2+) in aqueous media at differing initial ... -
New low-cost composite adsorbent synthesis and characterization
Akkaya, Recep; Akkaya, Birnur (TAYLOR & FRANCIS INC, 2013)In this research, a novel composite, poly(acrylamide-expanded perlite) [P(AAm-EP)], was synthesized and characterized. The chemical synthesis was achieved by using free-radical polymerization and a number of structural ... -
Production and immobilization of a novel thermoalkalophilic extracellular amylase from bacilli isolate
Akkaya, Birnur; Yenidunya, Ali Fazil; Akkaya, Recep (ELSEVIER SCIENCE BV, 2012)A Thermoalkalophilic amylase was produced from an environmental bacterial isolate. The enzyme was then immobilized through its amino groups onto the epoxy rings of magnetic poly glycidyl methacrylate [m-poly (GMA)] beads. ... -
Production, purification, and characterization of metalloprotease from Candida kefyr 41 PSB
Yavuz, Sevgi; Kocabay, Samet; Cetinkaya, Serap; Akkaya, Birnur; Akkaya, Recep; Yenidunya, Ali Fazil; Bakici, Mustafa Zahir (ELSEVIER SCIENCE BV, 2017)A thermostable metalloprotease, produced from an environmental strain of Candida kefyr 41 PSB, was purified 16 fold with a 60% yield by cold ethanol precipitation and affinity chromatography (bentoniteacrylamide-cysteine ... -
Removal of radio nuclides of the U- and Th- series from aqueous solutions by adsorption onto Polyacryamide-expanded perlite: Effects of pH, concentration and temperature
Akkaya, Recep (ELSEVIER SCIENCE BV, 2012)Poly (Acryamide-expanded perlite) [P(AAm-EP)1, was synthesized. The influence of process parameters: initial pH and five radio nuclides of the U- and Th- series (TI+, Ra2+, Bi3+, Ac3+ and Pb2+ in a leaching solution) ... -
Removal of radioactive elements from aqueous solutions by adsorption onto polyacrylamide-expanded perlite: Equilibrium, kinetic, and thermodynamic study
Akkaya, Recep (ELSEVIER SCIENCE BV, 2013)In this research, a novel composite, poly(aaylamide-expanded perlite) [P(AAm-EP)], was synthesized and its adsorptive features were investigated for UO22+ and Th4+ ions. The composite's adsorptive features were evaluated ... -
Separation of uranium and thorium in aqueous solution using polyhydroxyethylmethacrylate-hydroxyapatite novel composite
Akkaya, Recep (DESALINATION PUBL, 2012)Poly(hydroxyethylmethacrylate-hydroxyapatite) [P(HEMA-Hap)] composite was synthesized by free radical polymerization in aqueous solution. The adsorptive features of P(HEMA-Hap) composite were investigated for UO22+ and ... -
Synthesis and characterization of a new low-cost composite for the adsorption of rare earth ions from aqueous solutions
Akkaya, Recep (ELSEVIER SCIENCE SA, 2012)We synthesized and characterized a novel composite, poly(acrylamide-expanded perlite) [P(AAm-EP)] and investigated its adsorptive features for Tb3+. We achieved the synthesis by using free-radical polymerization and a ... -
Synthesis and Characterization of Poly(2-hydroxyethylmethacrylate-hydroxyapatite) a Novel Composite for the Removal of Lead(II) from Aqueous Solutions
Akkaya, Recep (WILEY-BLACKWELL, 2012)In the present study, a novel adsorbent, poly (2-hydroxyethylmethacrylate-hydroxyapatite) [P(HEMA-Hap)], was prepared and characterized. The synthesis was achieved by means of free-radical polymerization and a number of ... -
Terbium adsorption onto polyhydroxyethylmethacrylatehydroxyapatite composite and its modified composition by phytic acid
Akkaya, Recep (TAYLOR & FRANCIS INC, 2014)Hydroxyapatite (Hap) was entrapped in poly(hydroxyethylmethacrylate) P(HEMA) by direct polymerization and P(HEMA-Hap) was obtained in aqueous solution. Phytate (phy) was immobilized by phytic acid (phy) modification onto ... -
Thermodynamic parameters of TI+, Ra2+, Bi3+ and Ac3+ adsorption onto polyhydroxyethylmethacrylate-hydroxyapatite composite
Akkaya, Recep (SPRINGER, 2012)In this research, a new composite, poly (hydroxyethylmethacrylate-hydroxyapatite) [P(HEMA-Hap)], was synthesized and its adsorptive features for natural radionuclides (TI+, Ra2+, Bi3+ and Ac3+ in a leaching solution) were ... -
Tl-208, Pb-212, Bi-212, Ra-226 and Ac-228 adsorption onto polyhydroxyethylmethacrylate-bentonite composite
Akkaya, Recep; Ulusoy, Ulvi (ELSEVIER SCIENCE BV, 2012)The adsorption of naturally occurring radionuclides (Tl-208(+), (212)pb(2+), Ra-226(2+), Bi-212(3+) and Ac-228(3+)) onto Polyhydroxyethylmethacrylate-bentonite (PHEMA-B) composite was investigated. Experimentally obtained ... -
Uranium and thorium adsorption from aqueous solution using a novel polyhydroxyethylmethacrylate-pumice composite
Akkaya, Recep (ELSEVIER SCI LTD, 2013)Poly(hydroxyethylmethacrylate-pumice), [P(HEMA-Pum)], composite was synthesized by free radical polymerization in aqueous solution. The adsorptive features of P(HEMA-Pum) composite were investigated for UO22+ and Th4+ using ...
