TY - JOUR
T1 - Phosphorus adsorption onto green synthesized nano-bimetal ferrites
T2 - Equilibrium, kinetic and thermodynamic investigation
AU - Tu, Yao Jen
AU - You, Chen Feng
N1 - Funding Information:
This research was financially supported by MOE and NCKU to CFY. The authors would like to thank Prof. Jiang Wei-Teh and Mr. Lee Po-Shu for their support on XRD analysis under the project of NSC102-2119-M-006.
PY - 2014/9/1
Y1 - 2014/9/1
N2 - Phosphorus (P) in natural aquatic environments is one of the most critical elements for causing eutrophication. On the other hand, it is also an essential nutrient for organisms in broad ecosystems. Therefore, it has become an important issue in environmental and ecological sciences to remove and recover efficiently of P in various water bodies. This study investigates the feasibility of P removal/recovery using nano-bimetal ferrites (CuFe2O4), manufactured from industrial sludge. These new results reveal that a rapid P removal, from 9.9% to 99.9%, was observed when the solution pH decreased from 9.06 to 2.64. The maxima P adsorption capacity was found to be 13.5mgg-1 at pH 2.64 (318K), which is much higher than other available adsorbents. The observed negative changes in the standard free energy (δG=-4.99, -5.47, -6.12, -7.21kJmol-1 at 288, 298, 308, and 318K, respectively) and the positive value of δH(1.92kJmol-1) demonstrate that the adsorption reaction is spontaneous and endothermic. Moreover, we observed also that the P adsorption increases with the increased of ionic strength from 0.001 to 1.0N, suggesting important involvement of some inner-sphere mechanisms.
AB - Phosphorus (P) in natural aquatic environments is one of the most critical elements for causing eutrophication. On the other hand, it is also an essential nutrient for organisms in broad ecosystems. Therefore, it has become an important issue in environmental and ecological sciences to remove and recover efficiently of P in various water bodies. This study investigates the feasibility of P removal/recovery using nano-bimetal ferrites (CuFe2O4), manufactured from industrial sludge. These new results reveal that a rapid P removal, from 9.9% to 99.9%, was observed when the solution pH decreased from 9.06 to 2.64. The maxima P adsorption capacity was found to be 13.5mgg-1 at pH 2.64 (318K), which is much higher than other available adsorbents. The observed negative changes in the standard free energy (δG=-4.99, -5.47, -6.12, -7.21kJmol-1 at 288, 298, 308, and 318K, respectively) and the positive value of δH(1.92kJmol-1) demonstrate that the adsorption reaction is spontaneous and endothermic. Moreover, we observed also that the P adsorption increases with the increased of ionic strength from 0.001 to 1.0N, suggesting important involvement of some inner-sphere mechanisms.
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U2 - 10.1016/j.cej.2014.04.036
DO - 10.1016/j.cej.2014.04.036
M3 - Article
AN - SCOPUS:84900815269
SN - 1385-8947
VL - 251
SP - 285
EP - 292
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
ER -