TY - JOUR
T1 - Response surface methodology for the optimization of lanthanum removal from an aqueous solution using a Fe3O4/chitosan nanocomposite
AU - Haldorai, Yuvaraj
AU - Rengaraj, Arunkumar
AU - Ryu, Taegong
AU - Shin, Junho
AU - Huh, Yun Suk
AU - Han, Young Kyu
N1 - Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2015/5/1
Y1 - 2015/5/1
N2 - In the present work, magnetite nanoparticles/chitosan composites (Fe3O4/CS) were prepared by a chemical precipitation method. We demonstrated the efficient removal of a rare earth metal, lanthanum (La3+), from an aqueous solution using the composite. The removal of La3+ was optimized by using response surface methodology. Analysis of variance and Fisher's F-test were used to determine the reaction parameters which affect the removal of La3+. Optimal conditions, including adsorbent dosage, pH, temperature, and contact time for the removal of La3+, were found to be 6.5 mg, pH 11, 40 °C, and 50 min, respectively. The adsorption capacity was 99.88%. The rate of La3+ adsorption was significantly affected by the solution pH and adsorbent amount. An adsorption isotherm was fitted well by the Freundlich model with a linear regression correlation value of 0.9975. The adsorption of La3+ using the composite followed pseudo second-order kinetics. Thermodynamic studies have revealed that the negative values of Gibbs free energy confirmed the spontaneous and feasible nature of adsorption.
AB - In the present work, magnetite nanoparticles/chitosan composites (Fe3O4/CS) were prepared by a chemical precipitation method. We demonstrated the efficient removal of a rare earth metal, lanthanum (La3+), from an aqueous solution using the composite. The removal of La3+ was optimized by using response surface methodology. Analysis of variance and Fisher's F-test were used to determine the reaction parameters which affect the removal of La3+. Optimal conditions, including adsorbent dosage, pH, temperature, and contact time for the removal of La3+, were found to be 6.5 mg, pH 11, 40 °C, and 50 min, respectively. The adsorption capacity was 99.88%. The rate of La3+ adsorption was significantly affected by the solution pH and adsorbent amount. An adsorption isotherm was fitted well by the Freundlich model with a linear regression correlation value of 0.9975. The adsorption of La3+ using the composite followed pseudo second-order kinetics. Thermodynamic studies have revealed that the negative values of Gibbs free energy confirmed the spontaneous and feasible nature of adsorption.
KW - Adsorbent
KW - Chitosan
KW - Composite
KW - FeO nanoparticles
KW - Response surface methodology
UR - http://www.scopus.com/inward/record.url?scp=84978928028&partnerID=8YFLogxK
U2 - 10.1016/j.mseb.2015.01.006
DO - 10.1016/j.mseb.2015.01.006
M3 - Article
AN - SCOPUS:84978928028
SN - 0921-5107
VL - 195
SP - 20
EP - 29
JO - Materials Science and Engineering B: Solid-State Materials for Advanced Technology
JF - Materials Science and Engineering B: Solid-State Materials for Advanced Technology
ER -