Development of iron oxide nanoparticle adsorbents for arsenic and fluoride removal

Tc, Prathna; Sharma, Saroj; Kennedy, Maria D.

doi:10.5004/dwt.2017.20464

Cited by 22 publications

(3 citation statements)

References 32 publications

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“…Table 3 shows the comparison of the maximum adsorption capacity of MNPs investigated in this study for As(V) with other adsorbents reported in the literature. As can be observed from the results of this table that the non-modified iron oxide NPs [8] alone have very low adsorption capacity where as it is increased by chemical modification [9]. The metal loaded adsorbents, magnetic iron oxide NPs and MNPs possesses high adsorption capacity than other adsorbents [30] [34] [35] [36].…”

Section: ) Comparision Of Maximum Adsorption Capacity Of As(v) Ionsmentioning

confidence: 99%

“…[7]. Among them, adsorption is considered as one of the best methods available to eliminate contaminants from water bodies because it can reduce the pollutants concentration to trace levels and its easiness of operation [8]. Although, different adsorbing material such as activated carbon, oxides and hydroxides of metals, polymeric resins, clay minerals and zeolites etc.…”

Section: Introductionmentioning

confidence: 99%

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Green Synthesis of Magnetite Nanoparticles Using Aqueous Leaves Extracts of <i>Azadirachta indica</i> and Its Application for the Removal of As(V) from Water

Parajuli¹,

Sah²,

Paudyal³

2020

GSC

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Because of various disadvantages of chemical synthesis processes, these days people are attracting towards green synthesis processes as it is devoid of toxic by-products, cost-effective and eco-friendly. In this study, a simple green synthesis method is applied for the synthesis of magnetite (Fe 3 O 4) nanoparticles (MNPs) by co-precipitation of FeCl 3 •6H 2 O and FeSO 4 •7H 2 O in the molar ratio of 2:1 using Azadirachta indica leaves extract under nitrogen environment. FTIR, XRD, SEM etc. were used to characterize the synthesized MNPs. Batch adsorption experiments were carried out to determine adsorption equilibrium of As(V) as a function of pH, adsorbent dose, contact time and different initial concentrations. Kinetics results were best described by pseudo-second order model with rate constant value 0.0052 g/(mg•min). The equilibrium adsorption isotherm was best fitted with Langmuir adsorption isotherm model. The maximum adsorption capacity was found to be 62.89 mg/g at pH 2. MNPs showed a high affinity for As(V) and avoids filtration for solid-liquid separation, thus it would be employed as a promising material for the removal of As(V) from water.

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Section: ) Comparision Of Maximum Adsorption Capacity Of As(v) Ionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Green Synthesis of Magnetite Nanoparticles Using Aqueous Leaves Extracts of <i>Azadirachta indica</i> and Its Application for the Removal of As(V) from Water

Parajuli¹,

Sah²,

Paudyal³

2020

GSC

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“…Also, the peaks indicating Fe are displayed in the EDX spectrum compared to the same strain without supplementation of FeCl 3 . The dynamic light scattering (DLS) analysis also demonstrated that the size of FeNPs synthesized by the DR strain was about 141.8 nm to 164.2 nm (Figure 2c), which is relatively smaller than that of chemically synthesized FeNPs (192 ± 5.96 nm), which were also used for the removal of As(V) [19]. Previous studies on the characterization of nanomaterials reported that the adsorption capacity of the irregular and smaller size of nanomaterials tended to increase [20,21].…”

Section: Resultsmentioning

confidence: 99%

Highly Efficient and Stable Removal of Arsenic by Live Cell Fabricated Magnetic Nanoparticles

Kim

Jeong

Yang³

et al. 2019

IJMS

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As concerns about public health and environmental problems regarding contamination by toxic substances increase worldwide, the development of a highly effective and specific treatment method is imperative. Although physicochemical arsenic treatment methods have been developed, microbial in vivo remediation processes using live cell fabricated nanoparticles have not yet been reported. Herein, we report the development of magnetic iron nanoparticles immobilized an extremophilic microorganism, Deinococcus radiodurans R1, capable of removing toxic arsenic species. First, in vivo synthesis of magnetic iron nanoparticles was successfully achieved with the D. radiodurans R1 strain and characterized by scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDX), dynamic light scattering (DLS), zeta-potential, Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) analysis. Second, the maximum removal capacity of the magnetic iron nanoparticle-immobilized D. radiodurans R1 strain (DR-FeNPs) for arsenic [As(V)] was evaluated under the optimized conditions. Finally, the removal capacity of DR-FeNPs in the presence of various competitive anions was also investigated to simulate the practical application. More than 98% of As(V) was efficiently removed by DR-FeNPs within 1 h, and the removal efficiency was stably maintained for up to 32 h (98.97%). Furthermore, the possibility of recovery of DR-FeNPs after use was also suggested using magnets as a proof-of-concept.

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Fluoride Removal from Aqueous Solutions Using Poly(Styrene Sulfonate)/Nanoalumina Multilayer Thin Films

Prathna

Raichur

2018

Global Challenges

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In the present study, fluoride removal from drinking water is investigated using layer‐by‐layer (LbL) fabricated poly(sodium 4‐styrene‐sulfonate) (PSS)/Al 2 O 3 thin films. The surface morphology of the fabricated thin films is characterized using atomic force microscopy and field emission‐scanning electron microscopy. Optical profilometry is used to determine the self‐assembly of the multilayer thin films. The effect of various parameters such as adsorbent dosage, contact time, initial fluoride content, number of bilayers, surface area, and pH is thoroughly studied. Fluoride removal increases with the number of bilayers and number of slides (total surface area). The amount of fluoride adsorbed increases from 11.32 to 26 mg L −1 when the number of substrates increases from 1 to 5. A 68% removal of fluoride is observed when 20 bilayers of PSS/Al 2 O 3 thin films with three slides at an initial fluoride concentration of 5 mg L −1 are used, thereby bringing down the fluoride concentration level below the World Health Organization permissible limit. Slide reusability studies reveal that the fabricated thin films can be used for ten cycles without affecting the fluoride removal properties of the film. This study demonstrates the potential application of immobilized PSS/Al 2 O 3 thin films as an effective adsorbent for drinking water purification.

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Development of iron oxide nanoparticle adsorbents for arsenic and fluoride removal

Cited by 22 publications

References 32 publications

Green Synthesis of Magnetite Nanoparticles Using Aqueous Leaves Extracts of <i>Azadirachta indica</i> and Its Application for the Removal of As(V) from Water

Green Synthesis of Magnetite Nanoparticles Using Aqueous Leaves Extracts of <i>Azadirachta indica</i> and Its Application for the Removal of As(V) from Water

Highly Efficient and Stable Removal of Arsenic by Live Cell Fabricated Magnetic Nanoparticles

Fluoride Removal from Aqueous Solutions Using Poly(Styrene Sulfonate)/Nanoalumina Multilayer Thin Films

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Development of iron oxide nanoparticle adsorbents for arsenic and fluoride removal

Cited by 22 publications

References 32 publications

Green Synthesis of Magnetite Nanoparticles Using Aqueous Leaves Extracts of &lt;i&gt;Azadirachta indica&lt;/i&gt; and Its Application for the Removal of As(V) from Water

Green Synthesis of Magnetite Nanoparticles Using Aqueous Leaves Extracts of &lt;i&gt;Azadirachta indica&lt;/i&gt; and Its Application for the Removal of As(V) from Water

Highly Efficient and Stable Removal of Arsenic by Live Cell Fabricated Magnetic Nanoparticles

Fluoride Removal from Aqueous Solutions Using Poly(Styrene Sulfonate)/Nanoalumina Multilayer Thin Films

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Green Synthesis of Magnetite Nanoparticles Using Aqueous Leaves Extracts of <i>Azadirachta indica</i> and Its Application for the Removal of As(V) from Water

Green Synthesis of Magnetite Nanoparticles Using Aqueous Leaves Extracts of <i>Azadirachta indica</i> and Its Application for the Removal of As(V) from Water