Efficient adsorption of Selenium(IV) from water by hematite modified magnetic nanoparticles

Ma, Zhiyao; Shan, Chao; Liang, Jialiang; Tong, Meiping

doi:10.1016/j.chemosphere.2017.11.005

Cited by 87 publications

(30 citation statements)

References 43 publications

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“…Magnetic metal-ceramic nanocomposites, consisting of a dispersion of transition metal (TM = Fe, Co, Ni) nanoparticles into a ceramic matrix, are being actively studied in view of a variety of applications associated with their porous structure, ranging from environmental issues (e.g., water remediation [45][46][47], treatment of pollutants [48][49][50][51][52]) to catalysis [53][54][55][56] and biomedicine [57,58]).…”

Section: Ceramic Nanocompositesmentioning

confidence: 99%

Magnetic Properties of Nanocomposites

et al. 2019

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The magnetic properties of various families of nanocomposite materials containing nanoparticles of transition metals or transition-metal compounds are reviewed here. The investigated magnetic nanocomposites include materials produced either by dissolving a ferrofluid containing pre-formed nanoparticles of desired composition and size in a fluid resin submitted to subsequent curing treatment, or by generating the nanoparticles during the very synthesis of the embedding matrix. Two typical examples of these production methods are polymer nanocomposites and ceramic nanocomposites. The resulting magnetic properties turn out to be markedly different in these two classes of nanomaterials. The control of nanoparticle size, distribution, and aggregation degree is easier in polymer nanocomposites, where the interparticle interactions can either be minimized or exploited to create magnetic mesostructures characterized by anisotropic magnetic properties; the ensuing applications of polymer nanocomposites as sensors and in devices for Information and Communication Technologies (ICT) are highlighted. On the other hand, ceramic nanocomposites obtained from transition-metal loaded zeolite precursors exhibit a remarkably complex magnetic behavior originating from the simultaneous presence of zerovalent transition-metal nanoparticles and transition-metal ions dissolved in the matrix; the applications of these nanocomposites in biomedicine and for pollutant remediation are briefly discussed.

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Section: Ceramic Nanocompositesmentioning

confidence: 99%

Magnetic Properties of Nanocomposites

et al. 2019

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“…The chemical analogy between SO 4 2− and SeO 4 2− was also reported for explaining the strong impact of sulfate competitor anion on Se(VI) recovery using a polyamine weakly basic ionic exchange resin [48]. In the case of hematite modified magnetic nanoparticles [52], the sorption of selenate anions was inhibited by anions (in the range of concentrations: 0-10 mM) according the series: chloride ≈ nitrate (negligible) b sulfate b carbonate ≪ silicate bbb phosphate. The presence of small amounts of sulfate (i.e., 10 ppm) was sufficient for strongly limiting the sorption of both selenite and selenate on nanocrystallineimpregnated chitosan beads [53].…”

Section: Effect Of Coexisting Anionsmentioning

confidence: 75%

“…In the case of functionalized cellulose, selenate was quantitatively recovered from loaded sorbent using 3 M HCl/2% KClO 3 solutions [55]. Ma et al [52] used 0.01 M NaOH solutions for Se desorption from hematite modified magnetic nanoparticles.…”

Section: Desorption and Recyclability Studymentioning

confidence: 99%

Se(VI) sorption from aqueous solution using alginate/polyethylenimine membranes: Sorption performance and mechanism

Mo¹,

Vincent²,

Faur

et al. 2020

International Journal of Biological Macromolecules

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New high percolating alginate membranes are designed without using sophisticated drying methods: negatively charged alginate reacts with positively charged polyethylenimine (PEI), prior to be crosslinked with glutaraldehyde and air-dried. This is sufficient to obtain a highly macroporous structured membrane. Highly percolating properties of these new A-PEI membranes make the material applicable in natural drainage systems. The high density of amine groups in composite membranes explain their high affinity for anions in acidic solutions. FTIR, SEM-EDX and XPS analysis are used to explore the sorption mechanism. Se(VI) is sorbed through electrostatic attraction between positive amine groups and negative selenium anions; in a second step, bound Se(VI) is reduced by amine and hydroxyl groups in acidic conditions. A-PEI membranes are successfully used for recovering Se(VI) anions at pH 2. The maximum sorption capacity is close to 83 mg Se g −1 ; the sorption isotherm is described by the Sips and Langmuir equations. The membranes are poorly sensitive to flow rate in the range 15-50 mL min −1. The kinetic profiles are fitted by the pseudo-first order rate equation. Solute desorption is operated using NaOH solutions; the sorbent shows a remarkable stability in sorption and desorption properties for a minimum of 4 cycles.

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“…The presence of selenium in aquatic environments is gradually increasing and although selenium is an essential element for cellular growth, when consumed in excess it can lead to selenosis and other neurological and gastrointestinal implications [2,3]. Weathering of minerals alongside the high variety of human activities that involve selenium usages, such as industrial wastewaters, mining, and oil refinery activities, agricultural runoff, photosensitive materials, semiconductors, and insecticides, contribute massively to selenium pollution in aquifers [4,5]. Increasing reports of polluted drinking water sources obliged the European Commission to set the Drinking Water Regulation Limit (DWRL) for selenium to 10 µg/L [6].…”

Section: Introductionmentioning

confidence: 99%

Techno-Economic Evaluation of Iron and Aluminum Coagulants on Se(IV) Removal

Kalaitzidou

Bakouros

Mitrakas

2020

Water

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Research on selenium pollution in natural waters is continuous and discouraging. In this study, coagulation/precipitation was applied with the use of Fe(II), Fe(III), and poly-aluminum chloride (PACl) salts for Se(IV) removal at concentration range 10–100 μg Se(IV)/L that is commonly found in drinking waters. Prehydrolyzed Fe(III)-FeCl3 delivered the best uptake capacity (Q10 = 8.9 mg Se(IV)/g Fe(III) at pH 6) at the residual concentration equal to the drinking water regulation limit of 10 μg/L. This was much higher than the efficiencies achieved when applying the other coagulants: i.e., Q10 = 7.3 mg Se(IV)/g Fe3+-FeClSO4, Q10 = 6.4 mg Se(IV)/g prehydrolyzed Fe(III)-Fe2(SO4)3 and 0.7 mg Se(IV)/g Al-PACl at pH 6, and Q10 = 0.45 mg Se(IV)/g Fe(II) at pH 7.2. Comparing the different sources of Fe(III), it is apparent that Se(IV) uptake capacity is inhibited by the presence of SO42− in crystal structure of prehydrolyzed Fe2(SO4)3, while prehydrolyzed FeCl3 favors Se(IV) uptake. Temperature effect data showed that coagulation/precipitation is exothermic. In techno-economic terms, the optimal conditions for Se(IV) removal are coagulation/precipitation at pH values lower than 7 using prehydrolyzed Fe(III)-FeCl3, which provides a combination of minimum sludge production and lower operating cost.

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Efficient adsorption of Selenium(IV) from water by hematite modified magnetic nanoparticles

Cited by 87 publications

References 43 publications

Magnetic Properties of Nanocomposites

Magnetic Properties of Nanocomposites

Se(VI) sorption from aqueous solution using alginate/polyethylenimine membranes: Sorption performance and mechanism

Techno-Economic Evaluation of Iron and Aluminum Coagulants on Se(IV) Removal

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