A novel magnetite nanorod-decorated Si-Schiff base complex for efficient immobilization of U(vi) and Pb(ii) from water solutions. Issue 33 (3rd July 2018)

• Record Type: Journal Article
• Authors: Khan, Ayub; Xing, Jinlu; Elseman, Ahmed Mourtada; Gu, Pengcheng; Gul, Kashif; Ai, Yuejie; Jehan, Riffat; Alsaedi, Ahmed; Hayat, Tasawar; Wang, Xiangke
• Is Part Of: Dalton transactions. Volume 47:Issue 33(2018)
• Page Start: 11327
• Page End: 11336
• Publication Date: 2018-07-03
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c8dt01213j
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : A novel silicon Schiff base complex (Si-SBC) and magnetite nanorod-decorated Si-SBC (M/SiO2 -Si-SBC) were synthesized and well characterized in detail. Abstract : A novel silicon Schiff base complex (Si-SBC) and magnetite nanorod-decorated Si-SBC (M/SiO2 -Si-SBC) were synthesized and well characterized in detail. The synthesized materials were applied for the removal of U(vi ) and Pb(ii ) from water solutions under various experimental conditions. The monolayer maximum adsorption capacities of M/SiO2 -Si-SBC (6.45 × 10 −4 mol g −1 for Pb(ii ) and 4.82 × 10 −4 mol g −1 for U(vi )) obtained from the Langmuir model at 25 °C and pH = 5.00 ± 0.05 were higher than those of Si-SBC (5.18 × 10 −4 mol g −1 for Pb(ii ) and 3.70 × 10 −4 mol g −1 for U(vi )). Moreover, DFT calculations showed that the high adsorption energies ( E ad ) of 7.61 kcal mol −1 for Pb 2+ -(Si-SBC) and 2.72 kcal mol −1 for UO2 2+ -(Si-SBC) are mainly attributed to stronger electrostatic interactions. The results revealed that the Si-SBC and M/SiO2 -Si-SBC could be used as efficient adsorbents for the effective elimination of U(vi ) and Pb(ii ) from contaminated wastewater. High sorption capacity and reusability indicated the practical applications of the synthesized materials in environmental pollution cleanup.