TY - JOUR
T1 - Application of recycled iron oxide for adsorptive removal of strontium
AU - Tu, Yao Jen
AU - You, Chen Feng
AU - Chen, Yi Ru
AU - Huang, Chun Ping
AU - Huang, Yao Hui
PY - 2015/8/1
Y1 - 2015/8/1
N2 - To remove strontium (Sr) efficiently from aqueous solutions is important as Sr-90 is a radionuclide and could be a serious threat to the environment. This study examines the feasibility of Sr-90 removal using BT9, generated from a FBR-Fenton facility that was utilized in treating tannery wastewater. A rapid increased of Sr adsorption was detected when the solution pH increased from 7.11 to 11.22. A maxima adsorption capacity was estimated to be 29.85mg Sr/g BT9 at 323K and pH 11.22. Additionally, Sr adsorption decreases with the increase of the M/Sr from 0 to 100, indicating that the outer-sphere mechanism was importantly involved in the Sr adsorption. This Sr adsorption is spontaneous and endothermic, supported by the negative changed standard free energy with temperatures (δ G°=-5.75, -6.26, -6.72kJ/mol at 288, 303, and 323K, respectively) and the positive δ H° values (2.14kJ/mol). The positive δ S° (27.49J/molK) further indicates that the randomness increased at solid-solution interface during Sr adsorption.
AB - To remove strontium (Sr) efficiently from aqueous solutions is important as Sr-90 is a radionuclide and could be a serious threat to the environment. This study examines the feasibility of Sr-90 removal using BT9, generated from a FBR-Fenton facility that was utilized in treating tannery wastewater. A rapid increased of Sr adsorption was detected when the solution pH increased from 7.11 to 11.22. A maxima adsorption capacity was estimated to be 29.85mg Sr/g BT9 at 323K and pH 11.22. Additionally, Sr adsorption decreases with the increase of the M/Sr from 0 to 100, indicating that the outer-sphere mechanism was importantly involved in the Sr adsorption. This Sr adsorption is spontaneous and endothermic, supported by the negative changed standard free energy with temperatures (δ G°=-5.75, -6.26, -6.72kJ/mol at 288, 303, and 323K, respectively) and the positive δ H° values (2.14kJ/mol). The positive δ S° (27.49J/molK) further indicates that the randomness increased at solid-solution interface during Sr adsorption.
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U2 - 10.1016/j.jtice.2015.02.020
DO - 10.1016/j.jtice.2015.02.020
M3 - Article
AN - SCOPUS:84937632190
VL - 53
SP - 92
EP - 97
JO - Journal of the Taiwan Institute of Chemical Engineers
JF - Journal of the Taiwan Institute of Chemical Engineers
SN - 1876-1070
ER -