TY - JOUR
T1 - A radioactively durable melamine-styrene based polymer
T2 - Highly efficient removal of 90 Sr
AU - Karabayir, Erhan
AU - Ozdemir, Abdil
AU - Senkal, B. Filiz
AU - Taskin, Omer S.
N1 - Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/7
Y1 - 2019/7
N2 - Removal of strontium has a vital importance for radioactive waste management due to its long half-life. In this context, melamine-styrene based polymer (MSBP)was synthesized and characterized by different spectrophotometric methods. Sr 2+ ions were removed from the solution using MSBP sorbent. In this respect, adsorption of Sr 2+ onto melamine-based polymer was studied as a part of pH, amount of adsorbent, initial Sr 2+ concentration, contact time, temperature and particle size. Also, adsorption rate of radioactive strontium was investigated by using LSC (Liquid Scintillation Counter). The adsorption data were fitted to Langmuir, Freundlich and Dubinin-Radushkevich (D-R)isotherm models. MSBP sorbent reached maximum adsorption capacity for Sr 2+ as 142.9 mg.g −1 . Thermodynamic parameters such as free energy (ΔG 0 ), entropy (ΔS 0 )and enthalpy (ΔH 0 )of Sr 2+ adsorption on MSBP were examined at five different temperatures of 293 K, 303 K, 313 K, 323 K and 333 K. 0 < ΔH 0 values indicated that sorption mechanism presented endothermic feature. 0 > ΔG 0 and 0 < ΔS 0 revealed that Sr 2+ adsorption on MSBP occurred spontaneously and irreversible, respectively. Pseudo first and second orders were investigated as a part of kinetic parameters and seen that pseudo second order was much more convenient for adsorption of Sr 2+ onto MSBP.
AB - Removal of strontium has a vital importance for radioactive waste management due to its long half-life. In this context, melamine-styrene based polymer (MSBP)was synthesized and characterized by different spectrophotometric methods. Sr 2+ ions were removed from the solution using MSBP sorbent. In this respect, adsorption of Sr 2+ onto melamine-based polymer was studied as a part of pH, amount of adsorbent, initial Sr 2+ concentration, contact time, temperature and particle size. Also, adsorption rate of radioactive strontium was investigated by using LSC (Liquid Scintillation Counter). The adsorption data were fitted to Langmuir, Freundlich and Dubinin-Radushkevich (D-R)isotherm models. MSBP sorbent reached maximum adsorption capacity for Sr 2+ as 142.9 mg.g −1 . Thermodynamic parameters such as free energy (ΔG 0 ), entropy (ΔS 0 )and enthalpy (ΔH 0 )of Sr 2+ adsorption on MSBP were examined at five different temperatures of 293 K, 303 K, 313 K, 323 K and 333 K. 0 < ΔH 0 values indicated that sorption mechanism presented endothermic feature. 0 > ΔG 0 and 0 < ΔS 0 revealed that Sr 2+ adsorption on MSBP occurred spontaneously and irreversible, respectively. Pseudo first and second orders were investigated as a part of kinetic parameters and seen that pseudo second order was much more convenient for adsorption of Sr 2+ onto MSBP.
KW - Adsorption
KW - Kinetic and thermodynamic parameters
KW - Liquid radioactive waste
KW - Polymeric adsorbent
KW - Strontium
UR - http://www.scopus.com/inward/record.url?scp=85064668517&partnerID=8YFLogxK
U2 - 10.1016/j.apradiso.2019.04.024
DO - 10.1016/j.apradiso.2019.04.024
M3 - Article
C2 - 31048202
AN - SCOPUS:85064668517
SN - 0969-8043
VL - 149
SP - 96
EP - 103
JO - Applied Radiation and Isotopes
JF - Applied Radiation and Isotopes
ER -
