Novel ternary nanohybrids of tetraethylenepentamine and graphene oxide decorated with MnFe2 O4 magnetic nanoparticles for the adsorption of Pb(II)

Journal of Hazardous Materials
Wenbin XuJunrui Yao

Abstract

Novel ternary nanohybrids, consisting of tetraethylenepentamine (TEPA), graphene oxide (GO) and manganese ferrite magnetic nanoparticles (TEPA-GO/MnFe2O4), were prepared by a facile hydrothermal method and utilized to remove Pb(II) from aqueous solution effectively. The adsorbents were characterized by SEM, TEM, XRD, FTIR, zeta potential analysis, magnetization hysteresis loop, BET and XPS. These nanoparticles exhibited superparamagnetic behavior as well as high removal efficiency for Pb(II). Moreover, numerous amino groups of the functionalized pendant TEPA on GO coupled with the porous structure of TEPA-GO/MnFe2O4 contribute to high Pb(II) adsorption capacity. The maximum Pb(II) adsorption capacity of TEPA-GO/MnFe2O4 was determined to be 263.2 mg/g at the optimized solution pH of 5.5, much higher than that of GO/MnFe2O4 (133.3 mg/g) and GO (196.1 mg/g). The kinetics and isotherm data fitted well with the pseudo-second-order kinetics and the Langmuir isotherm model, respectively. Thermodynamic studies revealed that the Pb(II) adsorption of TEPA-GO/MnFe2O4 was a endothermic and spontaneous process. The experimental results corroborated that TEPA-GO/MnFe2O4 can be efficaciously reused after washed with HCl, indicative of its pot...Continue Reading

Citations

Jul 25, 2019·Environmental Science and Pollution Research International·Bolin LiWei Wang
Dec 16, 2019·Environmental Science and Pollution Research International·Quan ZhangQi Fan
Jan 25, 2020·Environmental Science and Pollution Research International·Zhenyuan LiYanmin Wang
Dec 11, 2019·Environmental Pollution·Behzad EyvaziAhmad Khodadadi Darban
Apr 15, 2021·Ecotoxicology and Environmental Safety·Jie WangXiaozhi Wang
Jun 15, 2019·Environmental Science & Technology·Dengjun WangChunming Su

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