Arsenic and antimony in water and wastewater: Overview of removal techniques with special reference to latest advances in adsorption

Ungureanu, Gabriela; Santos, Sílvia C.R.; Boaventura, Rui A.R.; Botelho, Cidália M.S.

doi:10.1016/j.jenvman.2014.12.051

Cited by 488 publications

(217 citation statements)

References 191 publications

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“…With increasing pH, As(V) changes from H 2 AsO 4 − to HAsO 4 2− and finally to AsO 4 3− for pH values above 8.0. 65 On the basis of the D-R isotherm model, both As(III) and As(V) are chemisorbed on the surface of ZCNs. The adsorption capacities are still very high for As(III) at pH values of 9.0 and 11.0 and for As(V) at pH 9.0, which is mainly attributed to the dominant adsorption being chemisorption under these pH values rather than the electrostatic adsorption.…”

Section: Acs Applied Materials and Interfacesmentioning

confidence: 99%

Zirconia (ZrO₂) Embedded in Carbon Nanowires via Electrospinning for Efficient Arsenic Removal from Water Combined with DFT Studies

Luo

et al. 2016

ACS Appl. Mater. Interfaces

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To use zirconia (ZrO 2 ) as an efficient environmental adsorbent, it can be impregnated on a support to improve its physical properties and lower the overall cost. In this study, ZrO 2 embedded in carbon nanowires (ZCNs) is fabricated via an electrospinning method to remove arsenic (As) from water. The maximum adsorption capacity values of As(III) and As(V) on the ZCNs are 28.61 and 106.57 mg/g, respectively, at 40°C. These capacities are considerably higher than those of pure ZrO 2 (2.56 and 3.65 mg/g for As(III) and As(V), respectively) created using the same procedure as for the ZCNs. Meanwhile, the adsorption behaviors of As(III) and As(V) on the ZCNs are endothermic and pH dependent and follow the Freundlich isotherm model and pseudo-first-order kinetic model. Both As(III) and As(V) are chemisorbed onto the ZCNs, which is confirmed by a partial density of state (PDOS) analysis and Dubinin−Radushkevich (D-R) model calculations. Furthermore, the ZCNs also possess the capability to enhance or catalyze the oxidation process of As(III) to As(V) using dissolved oxygen. This result is confirmed by a batch experiment, XPS analysis and Mulliken net charge analysis. Density functional theory (DFT) calculations indicate the different configurations of As(III) and As(V) complexes on the tetragonal ZrO 2 (t-ZrO 2 )(111) and monoclinic ZrO 2 (m-ZrO 2 )(111) planes, respectively. The adsorption energy (E ad ) of As(V) is higher than that of As(III) on both the tZrO 2 (111) and m-ZrO 2 (111) planes (3.38 and 1.90 eV, respectively, for As(V) and 0.37 and 0.12 eV, respectively, for As(III)).

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Section: Acs Applied Materials and Interfacesmentioning

confidence: 99%

Zirconia (ZrO₂) Embedded in Carbon Nanowires via Electrospinning for Efficient Arsenic Removal from Water Combined with DFT Studies

Luo

et al. 2016

ACS Appl. Mater. Interfaces

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“…Recently, varieties of adsorbents have been developed for the removal of antimony from aqueous solution [8,[14][15][16]. Nevertheless, the disadvantages of these conventional adsorbents should be addressed, such as greater difficulty of adsorbing Sb(V), which is the principal form of antimony in the aqueous environments, as compared to Sb(III) [17] and difficult to separate from the aquatic system when they are saturated. As an alternative mode, magnetic adsorbents (e.g., ␥-Fe 2 O 3 , Fe 3 O 4 , nZVI, etc.)…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Ce(III)-doped Fe3O4 magnetic particles for efficient removal of antimony from aqueous solution

Joshi

Liu

et al. 2017

Journal of Hazardous Materials

164

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“…Therefore water treatment based on the adsorption of contaminants using nanomaterials, such as cerium oxide or iron oxide-based nanoparticles, is relatively useful and cost effective method for water contaminants [30,31,32,33,34,35,36,37,38,39,40,41,42,43] and also for phosphate removal [30,31,33,34,35,36,38,39,40,41,43]. Adsorption is generally used to remove organic [44] and inorganic contaminants such as heavy metals [45] from water and wastewater treatment.…”

Section: Introductionmentioning

confidence: 99%

Phosphate removal and recovery from water using nanocomposite of immobilized magnetite nanoparticles on cationic polymer

Markeb

Alonso

Dorado

et al. 2016

Environmental Technology

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Highlights• Immobilization of magnetite nanoparticles on cationic polymer was synthesized.• Phosphate removal using magnetite based nanocomposites was tested.• Adsorption isotherms of phosphate at two pH; 5 and 7 were performed.• Different isotherms models were applied for experimental data fitting.• Regeneration and reusability of the magnetite based nanocomposites were carried out. Graphical Abstract 2 AbstractA novel nanocomposite based on magnetite nanoparticles (Fe3O4-NPs) immobilized on the surface of the cationic exchange polymer, C100, using a modification of the coprecipitation method was developed to obtain magnetic nanocomposites (NCs) for phosphate removal and recovery from water. High resolution TEM-EDS, SEM, XRD, and ICP-OES were used to characterize the NCs. The continuous adsorption process by the so-called breakthrough curves was used to determine the adsorption capacity of the Fe3O4 based NC. The adsorption 3 capacity conditions were studied under different conditions (pH, phosphate concentration and concentration of NPs). The optimum concentration of iron in the NC for phosphate removal was 23.59 mgFe/gNC. The sorption isotherms of this material were performed at pHs 5 and 7.Taking into account the real application of this novel material in real water, the experiments were performed at pH 7, achieving an adsorption capacity higher than 4.9 mgPO4-P/gNC.Moreover, Freundlich, Langmuir and a combination of them fit the experimental data and were used for interpreting the influence of pH on the sorption and the adsorption mechanism for this novel material. Furthermore, regeneration and reusability of the nanocomposite were tested obtaining 97.5 % recovery of phosphate for the first cycle and at least 7 cycles of adsorptiondesorption were carried out with more than 40% of recovery. Thus, this work described a novel magnetic nanoadsorbent with promoting properties for phosphate recovery in wastewater.

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Arsenic and antimony in water and wastewater: Overview of removal techniques with special reference to latest advances in adsorption

Cited by 488 publications

References 191 publications

Zirconia (ZrO₂) Embedded in Carbon Nanowires via Electrospinning for Efficient Arsenic Removal from Water Combined with DFT Studies

Zirconia (ZrO₂) Embedded in Carbon Nanowires via Electrospinning for Efficient Arsenic Removal from Water Combined with DFT Studies

Synthesis of Ce(III)-doped Fe3O4 magnetic particles for efficient removal of antimony from aqueous solution

Phosphate removal and recovery from water using nanocomposite of immobilized magnetite nanoparticles on cationic polymer

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Arsenic and antimony in water and wastewater: Overview of removal techniques with special reference to latest advances in adsorption

Cited by 488 publications

References 191 publications

Zirconia (ZrO2) Embedded in Carbon Nanowires via Electrospinning for Efficient Arsenic Removal from Water Combined with DFT Studies

Zirconia (ZrO2) Embedded in Carbon Nanowires via Electrospinning for Efficient Arsenic Removal from Water Combined with DFT Studies

Synthesis of Ce(III)-doped Fe3O4 magnetic particles for efficient removal of antimony from aqueous solution

Phosphate removal and recovery from water using nanocomposite of immobilized magnetite nanoparticles on cationic polymer

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Product

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Zirconia (ZrO₂) Embedded in Carbon Nanowires via Electrospinning for Efficient Arsenic Removal from Water Combined with DFT Studies

Zirconia (ZrO₂) Embedded in Carbon Nanowires via Electrospinning for Efficient Arsenic Removal from Water Combined with DFT Studies