TY - JOUR
T1 - Graphene oxide-based novel MOF nanohybrid for synergic removal of Pb (II) ions from aqueous solutions
T2 - Simulation and adsorption studies
AU - Singh, Simranjeet
AU - U, Basavaraju
AU - Kumar Naik, T. S.Sunil
AU - Behera, Sushant Kumar
AU - Khan, Nadeem A.
AU - Singh, Joginder
AU - Singh, Lakhveer
AU - Ramamurthy, Praveen C.
N1 - Publisher Copyright:
© 2022 Elsevier Inc.
PY - 2023/1/1
Y1 - 2023/1/1
N2 - Heavy metals represent a considerable threat, and the current study deals with synthesizing a novel MOF nanocomposite by intercalating graphene oxide (GO) and linker UiO-66-NDC. It was shown that UiO-66-NDC/GO had enhanced the removal efficiency of Pb (II) ions at pH 6. The adsorption kinetics data followed the PSO (Type 2) representing chemisorption. Adsorption data were also fitted with three different isotherms, namely Temkin, Freundlich, & Langmuir, and the Temkin model exhibited the best correlation (R2 0.99), representing the chemisorption nature of the adsorption process. The maximum adsorption capacity (qmax) of Pb (II) ions using Langmuir was found to be 254.45 mg/g (298 K). The Pb (II) adsorption process was confirmed to be exothermic and spontaneous as the thermodynamic parameters H° and G° were determined to have negative values. MOF nanocomposite also represents significant reusability for up to four regeneration cycles using 0.01 M HCl; for the next four, it works quite efficiently after regeneration. Meanwhile, the simulation findings confirm the superior dynamic stability (∼08 times) of the MOF nanocomposite as compared to the GO system. The removal of Pb (II) from simulated wastewater samples using a super nano-adsorbent using a MOF nanocomposite is described here for the first time.
AB - Heavy metals represent a considerable threat, and the current study deals with synthesizing a novel MOF nanocomposite by intercalating graphene oxide (GO) and linker UiO-66-NDC. It was shown that UiO-66-NDC/GO had enhanced the removal efficiency of Pb (II) ions at pH 6. The adsorption kinetics data followed the PSO (Type 2) representing chemisorption. Adsorption data were also fitted with three different isotherms, namely Temkin, Freundlich, & Langmuir, and the Temkin model exhibited the best correlation (R2 0.99), representing the chemisorption nature of the adsorption process. The maximum adsorption capacity (qmax) of Pb (II) ions using Langmuir was found to be 254.45 mg/g (298 K). The Pb (II) adsorption process was confirmed to be exothermic and spontaneous as the thermodynamic parameters H° and G° were determined to have negative values. MOF nanocomposite also represents significant reusability for up to four regeneration cycles using 0.01 M HCl; for the next four, it works quite efficiently after regeneration. Meanwhile, the simulation findings confirm the superior dynamic stability (∼08 times) of the MOF nanocomposite as compared to the GO system. The removal of Pb (II) from simulated wastewater samples using a super nano-adsorbent using a MOF nanocomposite is described here for the first time.
KW - DFT studies
KW - Isotherms
KW - Nanocomposite
KW - Pb (II)
KW - Removal
KW - UiO-66-NDC/GO
UR - http://www.scopus.com/inward/record.url?scp=85141775578&partnerID=8YFLogxK
U2 - 10.1016/j.envres.2022.114750
DO - 10.1016/j.envres.2022.114750
M3 - Article
C2 - 36370821
AN - SCOPUS:85141775578
SN - 0013-9351
VL - 216
JO - Environmental Research
JF - Environmental Research
M1 - 114750
ER -
