Development of microwave-assisted functionalized nanosilicas for instantaneous removal of heavy metals

作者：Mahmoud Mohamed E^*; Hassan Saad S M; Kamel Ayman H; Elserw Mahmoud I A

来源：Powder Technology, 2018, 326: 454-466.

DOI：10.1016/j.powtec.2017.12.001

• MES technique
• Immobilized nanosilica
• Carboxylic acids
• Microwave-assisted technique
• Solvent-free reaction
• Heavy metals removal

Nanosilica (N-Si) sorbent was functionalized by salicylic acid (N-Si-Sa) and succinic acid (N-Si-Su) utilizing mechanochemical blending and microwave-assisted reaction under solvent free conditions. The surface alteration of nanosilica particles was examined utilizing different techniques. N-Si-Sa and N-Si-Su sorbents were employed to remove Cd(II), Hg(II) and Pb(II) from water matrices utilizing microwave-enforced sorption (MES) technique as a powerful, quick and green approach. The MES values of Cd(II), Hg(II) and Pb(II) were characterized as 1100, 750 and 1000 mu mol g(-1), respectively utilizing 10 mg of N-Si-Sa and 15 s of microwave warming as well as 1100, 650 and 1000 mu mol g(-1), respectively by utilizing N-Si-Su under the same conditions. The sorption behaviors of metals by N-Si-Sa and N-Si-Su were described by Langmuir and Freundlich isotherm models. The functionalized nanosilica sorbents were effectively connected for adsorptive treatment of the three analyzed metals from various water samples with superb recovery estimations through the productive utilization of MES technique. The collected data displayed a superior and excellent solid phase extraction procedure for treatment of the three analyzed metals from their matrices in few seconds utilizing the MES strategy.

• 出版日期2018-2-15