Phosphate removal by a nano-biosorbent from the synthetic and real (Persian Gulf) water samples

Arshadi, M.; Gholtash, Jamileh Etemad; Zandi, Hassan Gharayagh; Foroughifard, S.

doi:10.1039/c5ra03191e

Cited by 17 publications

(10 citation statements)

References 53 publications

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“…The successful chemical modification of the filter paper by NaOH and NZVI was confirmed by FT-IR spectroscopy (Figure A), in which a broad absorption band at 3250–3500 cm –1 decreased and the bands corresponding to aliphatic bond of the organic support (cellulose fiber) at 2916 and 2854 cm –1 were reduced in the FP–OH–NZVI sample compared to the pristine \filter paper. The additional manifestation of a peak at 802 cm –1 after the NaOH/NZVI treatment was ascribed to Fe(0). , The peaks at 709 and 447 cm –1 can be ascribed to Fe–O stretching vibrations …”

Section: Resultsmentioning

confidence: 99%

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Synthesis of Highly Monodispersed, Stable, and Spherical NZVI of 20–30 nm on Filter Paper for the Removal of Phosphate from Wastewater: Batch and Column Study

Arshadi

Abdolmaleki

Eskandarloo

et al. 2018

ACS Sustainable Chem. Eng.

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A nanobiodegradable adsorbent was prepared by stabilizing nanoscale zerovalent iron (NZVI) on cellulose filter paper. Characterization of the sample disclosed that the NZVI particles were rounded, well-monodispersed through the paper, and smaller than 30 nm in diameter. We explored this material's ability to capture phosphate ions in batch and repeated operations, specifically studying the impact of pH, adsorption time, initial phosphate concentration, interference ions, and temperature. The equilibrium results were matched to dissimilar kinds of adsorption isotherms, with the Sips adsorption model displaying the best match. The stabilized NZVI indicated high reusability after 7 adsorption−desorption cycles. We also demonstrated how this nanobiodegradable adsorbent could be applied to eliminate phosphate ions from a real water source (Cayuga Lake). In the continuous system, the results confirmed that an enhancement in the initial phosphate ion concentration improved the phosphate removal ability of the filter-paper-stabilized NZVI, likely due to more motive power for mass transfer by the greater phosphate concentration. However, an enhancement in bed height and flow rate reduced phosphate removal because of the higher flow rate decreasing the reaction time of the solution and adsorbent, whereas the higher bed height resulted in a channeling effect. Breakthrough curves gained from fixed-bed column tests showed the strong potential of the NZVI for phosphate ion sequestration. An artificial neural network model was used to envision the phosphate ions removal in both batch and continuous systems by this composite. The adsorption mechanism of phosphate onto the filter-paperstabilized NZVI was further investigated by X-ray spectroscopy, X-ray diffraction, elemental mapping, and zeta potential techniques.

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Section: Resultsmentioning

confidence: 99%

“…23,24 The peaks at 709 and 447 cm −1 can be ascribed to Fe−O stretching vibrations. 25 The structure of the unmodified filter paper and FP−OH− NZVI were also characterized by XRD (Figure 1B). For the filter paper, the diffraction peaks occur at 15.1, 16.8, and 22.5°, equivalent to the cellulose crystalline phase.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Synthesis of Highly Monodispersed, Stable, and Spherical NZVI of 20–30 nm on Filter Paper for the Removal of Phosphate from Wastewater: Batch and Column Study

Arshadi

Abdolmaleki

Eskandarloo

et al. 2018

ACS Sustainable Chem. Eng.

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“…Furthermore, a low n value indicates the existence of a high proportion of high-energy active sites. 25 The values of 1/n were between 0 and 1, which indicated that adsorption was favorable. According to Figures 11 and 12, Freundlich isotherms better explain the adsorption of Hg(II) than…”

Section: Adsorption Isothermsmentioning

confidence: 97%

Preparation, characterization, and adsorption studies of core@shell SiO$_{2}$@CeO$_{2}$ nanoparticles: a new candidate to remove Hg(II) from aqueous solutions

Vai̇zoğullar¹,

Balcı²,

Kula³

et al. 2016

Turk J Chem

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SiO 2 supported core@shell nanoparticles (CSNs) have recently attracted great attention due to their unique, tunable, optical, photocatalytic, and higher adsorption properties. In this study, SiO 2 @CeO 2 CSNs were synthesized using a chemical precipitation technique and characterized by Fourier transform infrared (FT-IR), X-ray diffraction (XRD), scanning electron microscope (SEM), and transmission electron microscope (TEM) analysis. XRD analysis showed that SiO 2 particles were the core while CeO 2 particles were the shell. It was seen as a new band at 961 cm −1 of the oxygen bridge between Si and Ce atoms from FT-IR results; SiO 2 and CSNs were spherical (0.5-0.6 µ m) from SEM and TEM analyses. Different parameters such as contact time, initial concentration, pH, and temperature were investigated. The optimum conditions for temperature, pH, and contact time were 25 • C, 8.0, and 60 min, respectively. In addition, the equilibrium adsorption data were interpreted using Langmuir and Freundlich models to describe the uptake of Hg(II). The Freundlich isotherm model (R 2 : 0.99) fit better than Langmuir and the qmax value was 153.8 µ g g −1 at various concentrations (0.1-1 mg L −1). The thermodynamic parameters were also calculated and, from these results, it can be shown that our synthesized particles can be used in water purification systems to remove Hg(II).

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“…(Bio)sorbent-mediated adsorption is a widely used method for remediating eutrophic waters. Several chemical materials such as Bephos™ (Zamparas et al 2013), Al 2 O 3 (Genz et al 2004), zeolite (Gibbs and Özkundakci 2010), and iron compounds (Deppe and Benndorf 2002;Chen et al 2016), as well as biomaterials such as sawdust (Pantano et al 2017), biochar (Cai et al 2017), corn straw (Wang et al 2016a), and ostrich bone waste (Arshadi et al 2015) have been investigated. Nano-and magnetic sorbents not only are efficient for P-removal but also can reclaim P from aqueous solutions (Cai et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Efficient phosphate accumulation in the newly isolated Acinetobacter junii strain LH4

Han

Wang

et al. 2018

3 Biotech

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Phosphate (PO) accumulation associated with bacteria contributes to efficient remediation of eutrophic waters and has attracted attention due to its low cost, high removal efficiency and environmental friendliness. In the present study, we isolated six strains from sludge with high concentrations of chemical oxygen demand, total nitrogen and total phosphorus levels. Among them, strain LH4 exhibited the greatest PO removal ability. Strain LH4 is typical of based on physiological, biochemical, and molecular analyses and is a PO-accumulating organism (PAO) based on toluidine blue staining. The strain grew quickly when subjected to aerobic medium after pre-incubation under anaerobic condition, with a maximum OD of 1.429 after 8 h and PO removal efficiency of 99%. Our data also indicated that this strain preferred utilizing the carbon (C) sources sodium formate and sodium acetate and the nitrogen (N) sources NHCl and (NH)SO over other compounds. To achieve optimal PO removal efficiency, a C:N ratio of 5:1, inoculation concentration of 3%, solution pH of 6, incubation temperature of 30 °C, and shaking speed of 100 rpm were recommended for strain LH4. By incubating this strain with different concentrations of PO, we calculated that its relative PO removal capacity ranged from 0.67 to 3.84 mg L h, ranking in the top three among reported PAOs. Our study provided a new PO-accumulating bacterial strain that holds promise for remediating eutrophic waters, and its potential for large-scale use warrants further investigation.

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Phosphate removal by a nano-biosorbent from the synthetic and real (Persian Gulf) water samples

Abstract: The NZVI has been synthesized and immobilized on the ostrich bone waste with high chemical stability to uptake P ions from (Persian Gulf) water. XRD results confirmed the presence of Fe3(PO4)2·8H2O on the B-HNO3-NZVI-P.

Cited by 17 publications

References 53 publications

Synthesis of Highly Monodispersed, Stable, and Spherical NZVI of 20–30 nm on Filter Paper for the Removal of Phosphate from Wastewater: Batch and Column Study

Synthesis of Highly Monodispersed, Stable, and Spherical NZVI of 20–30 nm on Filter Paper for the Removal of Phosphate from Wastewater: Batch and Column Study

Preparation, characterization, and adsorption studies of core@shell SiO$_{2}$@CeO$_{2}$ nanoparticles: a new candidate to remove Hg(II) from aqueous solutions

Efficient phosphate accumulation in the newly isolated Acinetobacter junii strain LH4

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