Highly adsorptive and regenerative magnetic TiO2 for natural organic matter (NOM) removal in water

Ng, Mega; Kho, Ee Teng; Liu, Sanly; Lim, May; Amal, Rose

doi:10.1016/j.cej.2014.02.015

Cited by 25 publications

(10 citation statements)

References 56 publications

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“…It was reported that calcination crystallised the surface TiO 2 of Fe 3 O 4 @SiO 2 @TiO 2 nanoparticles (Ng et al, 2014). Table 1 shows the semi-quantitative XRD results of untreated and calcined (400°C for 1 h) Fe 3 O 4 @SiO 2 @TiO 2 nanoparticles.…”

Section: X-ray Diffraction (Xrd)mentioning

confidence: 97%

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Removal of arsenic from alkaline process waters of gold cyanidation by use of Fe3O4@SiO2@TiO2 nanosorbents

Feng

Aldrich

Eksteen

et al. 2017

Minerals Engineering

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Section: X-ray Diffraction (Xrd)mentioning

confidence: 97%

“…The Fe 3 O 4 @SiO 2 @TiO 2 nanosorbent was prepared via a conventional sol-gel technique (Kang et al, 2014;Ng et al, 2014) with a few modifications, as outlined below.…”

Section: Preparation Of Fe 3 O 4 @Sio 2 @Tio 2 Nanosorbentmentioning

confidence: 99%

Removal of arsenic from alkaline process waters of gold cyanidation by use of Fe3O4@SiO2@TiO2 nanosorbents

Feng

Aldrich

Eksteen

et al. 2017

Minerals Engineering

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“…goethite, hematite, magnetic TiO 2 , and montmorillonite) has been studied by many authors [8][9][10][11][12][13]. In general, goethite and hematite have higher capacities of NOM adsorption than montmorillonite, kaolinite, and other clay minerals [11,14].…”

Section: Introductionmentioning

confidence: 98%

Fractionation of humic acid upon adsorption to goethite: Batch and column studies

Qin

Liu

Wang

et al. 2015

Chemical Engineering Journal

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“…Although the disinfecting agents play an important role in keeping drinking water supplies safe, applying these agents could cause the formation of harmful disinfection by-products (DBPs) resulted from their reaction with NOM. From the qualitative point of view, the presence of NOM in the water could contribute to the formation of odor, poor color, and taste [2]. In addition, NOM, by forming complex with heavy metals, increases the solubility of these metals in the water; besides, reproduction of bacteria at the presence of NOM is facilitated which could jeopardize the health of people [3].…”

Section: Introductionmentioning

confidence: 99%

Silica-coated magnetite nanoparticles core-shell spheres (Fe3O4@SiO2) for natural organic matter removal

Pasandideh

Kakavandi

Nasseri

et al. 2016

J Environ Health Sci Engineer

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BackgroundIn this work, the magnetite (Fe3O4) nanoparticles (MNPs) and silica-coated magnetite nanoparticles (SMNPs) were synthesized as adsorbents for removing humic acid (HA) from water resources.MethodsThe adsorption processes were performed in batch experiments with which the influence of pH, reaction time, adsorbent dosage, initial concentrations of HA and temperature were investigated. Specific techniques were applied to characterize the features of both adsorbents (i. e. TECHNIQUES) (SEM, XRD, TEM, BET, EDX and VSM).ResultsThe maximum saturation magnetization for SMNPs was 30.2 emu/g, which made its separation from the solution by a magnetic field to be easier and faster. The HA adsorption process onto the both adsorbents were best described by the Freundlich isotherm and pseudo-second-order kinetic models. Highest adsorption efficiency of HA by MNPs an d SMNPs occurred at acidic conditions (pH ≈ 3). The mechanisms of adsorption process involved with a physisorption process such as (i. e. hydrogen bonding and electrostatic interaction). The predicted maximum monolayer adsorption capacities obtained by Langmuir isotherm model for MNPs and SMNPs were 96.15 and 196.07 mg/g, respectively.ConclusionHigher amount of HA adsorption onto the surfaces of SMNPs than MNPs surfaces was observed, reflecting that silica impregnated on MNPs enhances the efficiency of the adsorbent in removing HA.Electronic supplementary materialThe online version of this article (doi:10.1186/s40201-016-0262-y) contains supplementary material, which is available to authorized users.

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Highly adsorptive and regenerative magnetic TiO2 for natural organic matter (NOM) removal in water

Cited by 25 publications

References 56 publications

Removal of arsenic from alkaline process waters of gold cyanidation by use of Fe3O4@SiO2@TiO2 nanosorbents

Removal of arsenic from alkaline process waters of gold cyanidation by use of Fe3O4@SiO2@TiO2 nanosorbents

Fractionation of humic acid upon adsorption to goethite: Batch and column studies

Silica-coated magnetite nanoparticles core-shell spheres (Fe3O4@SiO2) for natural organic matter removal

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