Remediation of mercury contaminated saltwater with functionalized silica coated magnetite nanoparticles

Mohmood, Iram; Lopes, Cláudia B.; Lopes, Isabel; Tavares, Daniela; Soares, Amadeu M.V.M.; Duarte, Armando C.; Trindade, Tito; Ahmad, Iqbal; Pereira, Eduarda

doi:10.1016/j.scitotenv.2016.03.075

Cited by 48 publications

(27 citation statements)

References 40 publications

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“…A novel magnetic nanosorbent has been synthesized by Schiff's base formation via covalent bonding of gelatin to the surface of nano-magnetite-immobilized-3-aminopropyltrimethoxysilane (NanoFe3O4-Si-N=Gelatin) and it has the maximum capacity of Cd 2+ and Pb 2+ as 49.5 and 82.9 mg g −1 , respectively [329]. Dithiocarbamate functionalized silica coated MNPs display great affinity for Hg 2+ , but they are not effective at removing As and Cd from seawater [330]. MNPs with a surface functionalization of dimercaptosuccinic acid (DMSA) are an effective sorbent material for Hg 2+ , Ag + , Pb 2+ , Cd 2+ , and Tl + , which effectively bind to the DMSA ligands and for As, which binds to the iron oxide lattices.…”

Section: Cr(vi) and Cr(iii)mentioning

confidence: 99%

Environmental implications and applications of engineered nanoscale magnetite and its hybrid nanocomposites: A review of recent literature

2017

Journal of Hazardous Materials

306

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Section: Cr(vi) and Cr(iii)mentioning

confidence: 99%

Environmental implications and applications of engineered nanoscale magnetite and its hybrid nanocomposites: A review of recent literature

2017

Journal of Hazardous Materials

306

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“…Currently, synthesis of an adsorbent using the silicamagnetite coating technique has been developed because adsorbent quality increases can be carried out by coating MNPs on silica as a supporting matrix [30][31][32][33][34]. The silica coating technique with the use of a magnet is an environmentally friendly technique because it does not result in contaminated products.…”

Section: Introductionmentioning

confidence: 99%

Removal of Ni(II), Cu(II), and Zn(II) ions from aqueous solution using Tetraselmis sp. biomass modified with silica-coated magnetite nanoparticles

Buhani¹,

Rinawati²,

Suharso³

et al. 2017

Desalination and Water Treatment

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a b s t r a c tModification of algae-silica (AS) hybrid material from Tetraselmis sp. biomass (AS) was performed through a sol-gel simultaneous process and coated with Fe 3 O 4 magnetite nanoparticles (MNPs). Algae-silica hybrid material from Tetraselmis sp. biomass-coated MNPs (AS-MNPs) were used as adsorbents of heavy metal ions. The adsorption processes of Ni(II), Cu(II), and Zn(II) ions with AS and algae-silica-magnetite nanoparticles (AS-MNPs) fit pseudo-second-order kinetic models. The rate constant and adsorption capacity of Ni(II), Cu(II), and Zn(II) ions for AS-MNPs obtained from these experiments were higher than those of AS. AS-MNPs material is an effective adsorbent and can be used to absorb heavy metal ions in solution.

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“…Fe 3 O 4 @SiO 2 magnetic nanoparticles modified by grafting poly(1-vinylimidazole) oligomer were used to remove Hg 2+ from water reaching a maximum capacity of 346 mg/g [21]. Fe 3 O 4 nanoparticles coated with silica shells functionalized with dithiocarbamate groups were used for mercury removal from seawater and quantification of mercury in natural waters [25,26]. Nanocomposites based on Fe 3 O 4 nanoparticles, chitosan nanoparticles and polythiophene were used for Hg 2+ removal from aqueous solutions reaching a loading of about 50 mg/g [27].…”

Section: Introductionmentioning

confidence: 99%

Magnetic Fe3O4-Ag0 Nanocomposites for Effective Mercury Removal from Water

et al. 2020

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In this study, magnetic Fe3O4 particles and Fe3O4-Ag0 nanocomposites were prepared by a facile and green method, fully characterized and used for the removal of Hg2+ from water. Characterizations showed that the Fe3O4 particles are quasi-spherical with an average diameter of 217 nm and metallic silver nanoparticles formed on the surface with a size of 23–41 nm. The initial Hg2+ removal rate was very fast followed by a slow increase and the maximum solid phase loading was 71.3 mg/g for the Fe3O4-Ag0 and 28 mg/g for the bare Fe3O4. The removal mechanism is complex, involving Hg2+ adsorption and reduction, Fe2+ and Ag0 oxidation accompanied with reactions of Cl− with Hg+ and Ag+. The facile and green synthesis process, the fast kinetics and high removal capacity and the possibility of magnetic separation make Fe3O4-Ag0 nanocomposites attractive materials for the removal of Hg2+ from water.

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Remediation of mercury contaminated saltwater with functionalized silica coated magnetite nanoparticles

Cited by 48 publications

References 40 publications

Environmental implications and applications of engineered nanoscale magnetite and its hybrid nanocomposites: A review of recent literature

Environmental implications and applications of engineered nanoscale magnetite and its hybrid nanocomposites: A review of recent literature

Removal of Ni(II), Cu(II), and Zn(II) ions from aqueous solution using Tetraselmis sp. biomass modified with silica-coated magnetite nanoparticles

Magnetic Fe3O4-Ag0 Nanocomposites for Effective Mercury Removal from Water

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