Arsenate removal on the iron oxide ion exchanger modified with Neodymium(III) ions

Dudek, Sebastian; Kołodyńska, Dorota

doi:10.1016/j.jenvman.2022.114551

Cited by 9 publications

(12 citation statements)

References 61 publications

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“…An optimum pH in the range 6.0–7.0, for the adsorption of As(V), has been reported for aminoalkyl-organo-silane-treated sand . Dudek and Kolodynska also observed the increase of As(V) adsorption with the increase of pH up to 5.0 and a steady decrease after that …”

Section: Resultsmentioning

confidence: 84%

“…The Elovich kinetic model reveals the role of adsorbent surface heterogeneity and supports chemisorption as the possible mechanism of sorption. However, Table S1 shows that the values of R 2 are <0.9 in the case of Elovich model, and this indicates that the adsorption mechanism of arsenic is not of the chemisorption type. , …”

Section: Resultsmentioning

confidence: 94%

“… 45 Dudek and Kolodynska also observed the increase of As(V) adsorption with the increase of pH up to 5.0 and a steady decrease after that. 16 …”

Section: Resultsmentioning

confidence: 99%

“…However, Table S1 shows that the values of R 2 are <0.9 in the case of Elovich model, and this indicates that the adsorption mechanism of arsenic is not of the chemisorption type. 16 , 41 …”

Section: Resultsmentioning

confidence: 99%

“…Therefore, there is a stringent need to develop highly efficient technologies to remove arsenic species from groundwater and wastewaters. Removal of arsenic ions is usually performed by nanofiltration and reverse osmosis, electrocoagulation, chemical precipitation, ion exchange, ,− and adsorption. ,,,− Among the most accessed technologies for removal of arsenic, adsorption is obviously the most attractive by its accessible costs, easy operation, and large potential for the development of new generations of adsorbents. ,− …”

Section: Introductionmentioning

confidence: 99%

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Optimization of Arsenic Removal from Aqueous Solutions Using Amidoxime Resin Hosted by Mesoporous Silica

Humelnicu

Ignat

Dinu³

et al. 2022

ACS Omega

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The paper reports on the performances of cross-linked amidoxime hosted into mesoporous silica (AMOX) in the removal of As(III) and As(V). The optimum pH for sorption of As(III) and As(V) was pH 8 and pH 5, respectively. The PFO kinetic model and the Sips isotherm fitted the best the experimental data. The thermodynamic parameters were evaluated using the equilibrium constant values given by the Sips isotherm at different temperatures and found that the adsorption process of As(III) and As(V) was spontaneous and endothermic on all AMOX sorbents. The spent AMOX sorbents could be easily regenerated with 0.2 mol/L HCl solution and reused up to five sorption/desorption cycles with an average decrease of the adsorption capacity of 18%. The adverse effect of the co-existing inorganic anions on the adsorption of As(III) and As(V) onto the sorbent with the highest sorption capacity (AMOX3) was arranged in the following order: H 2 PO 4 – > HCO 3 – > NO 3 – > SO 4 2– .

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Section: Resultsmentioning

confidence: 84%

Section: Resultsmentioning

confidence: 94%

“… 45 Dudek and Kolodynska also observed the increase of As(V) adsorption with the increase of pH up to 5.0 and a steady decrease after that. 16 …”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Optimization of Arsenic Removal from Aqueous Solutions Using Amidoxime Resin Hosted by Mesoporous Silica

Humelnicu

Ignat

Dinu³

et al. 2022

ACS Omega

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Bismuthene@ZnAlBi LDHs structure as a novel nanosorbent for efficient uptake of arsenic (V)

Hassan,

Mahmoud,

Tharwat

et al. 2024

Appl Water Sci

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Two-dimensional bismuthene material is characterized with promising and superior optical, electrical and other characteristics. The application of 2D-bismuthene or its composites in water remediation of As(V) was not previously investigated. Consequently, embedded bismuthene into zinc aluminum bismuth-layered double hydroxide (ZnAlBi LDHs-embedded-Biene) was simply fabricated as a novel nanosorbent. Bismuthene (Biene) was prepared by bottom up hydrothermal reaction, while ZnAlBi LDHs was synthesized by a coprecipitation method followed by hydrothermal treatment process. Characterization of ZnAlBi LDHs-embedded-Biene referred to a crystalline mesoporous structure of globular particles with 5–8 nm. It was confirmed that the nanosorbent exterior surface is functionalized with metal oxides and metal oxyhydroxide, while exchangeable carbonate anion existed in the nanosorbent inner layer. Therefore, arsenate uptake was favored by both exterior electrostatic attraction and anion exchange processes. The highest uptake capacity of As(V) by ZnAlBi LDHs-embedded-Biene was detected at pH 3 and contact time 30 min providing 94.67% removal by using 5 mg L−1 As(V) concentration. The ionic strength factor proved a good selectivity of the nanosorbent toward As(V) ions. Thermodynamic behavior of interaction between As(V) and nanosorbent was emphasized as exothermic and spontaneous process, while the kinetic evaluation indicated that the pseudo-second order was the best-fitting expression. The application of ZnAlBi LDHs-embedded-Biene in the adsorptive uptake process of As(V) ions from various water samples referred to elevated uptake percentages as 93.29% and 90.52% by 5 mg L−1 and 10 mg L−1 As(V), respectively. The adsorbed As(V) onto ZnAlBi LDHs-embedded-Biene exhibited excellent recyclability and re-usage up to five cycles to affirm that the designed ZnAlBi LDHs-embedded-Biene has a great prospect for utilization in water purification from As(V).

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Electrified technologies for physical separation of arsenic from water

Cerrón-Calle

Santos

Lanza

et al. 2023

Current Opinion in Environmental Science & Health

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Arsenate removal on the iron oxide ion exchanger modified with Neodymium(III) ions

Cited by 9 publications

References 61 publications

Optimization of Arsenic Removal from Aqueous Solutions Using Amidoxime Resin Hosted by Mesoporous Silica

Optimization of Arsenic Removal from Aqueous Solutions Using Amidoxime Resin Hosted by Mesoporous Silica

Bismuthene@ZnAlBi LDHs structure as a novel nanosorbent for efficient uptake of arsenic (V)

Electrified technologies for physical separation of arsenic from water

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