Development and regeneration of composite of cationic gel and iron hydroxide for adsorbing arsenic from ground water

Safi, Syed Ragib; Gotoh, Takehiko; Iizawa, Takashi; Nakai, Satoshi

doi:10.1016/j.chemosphere.2018.11.050

Cited by 33 publications

(29 citation statements)

References 49 publications

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“…The maximum arsenic adsorption capacity of the gel was 123.4 mg/g, at neutral pH levels. In our previous research, we reported that the adsorption amount of As(V) by DMAPAAQ + FeOOH gel composite was higher than the other researches at neutral pH levels 11 . This gel functions when it is put into water and its surface area increases to adsorb arsenic.…”

Section: Introductionmentioning

confidence: 73%

“…A microgel, tris(2-aminoethyl) amine (TAEA) and glyceroldiglycidyl ether (GDE), p(TAEA-co-GDE) achieved 98.72 mg/g of maximum arsenic adsorption capacity was achieved by the microgel at pH 4 45 . Although these gels have high adsorption capabilities, their selectivity in all studied environments was low and they failed to effectively remove arsenic from water at neutral pH levels 11 . A maximum adsorption capacity of 227 μg/g of was measured when Fe(III)-Sn(IV) mixed binary oxide-coated sand was used at a temperature of 313 K and a pH of 7 46 .…”

Section: Introductionmentioning

confidence: 99%

“…Natural processes such as weathering reactions, anthropogenic and biological activities, and volcanic emissions mobilize arsenic in the environment 9 . Arsenic can therefore be found in the atmosphere, soils, rocks, natural waters and organisms 10,11 . Of all these sources, human beings are exposed to high levels of arsenic through the consumption of groundwater 12 .…”

Section: Introductionmentioning

confidence: 99%

“…Notably, 87.6% regeneration efficiency over the course of eight consecutive days of experimentation was achieved, when NaCl was used for desorption, instead of harmful NaOH. The use of NaCl for desorption of As(V) from an adsorbent was an advantageous finding 11,49 . In the present study, we evaluated the characteristics that contribute to the high adsorption performances of the gel composite and discussed the details in the later sections.…”

Section: Introductionmentioning

confidence: 99%

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The effect of γ-FeOOH on enhancing arsenic adsorption from groundwater with DMAPAAQ + FeOOH gel composite

Safi

Senmoto

Gotoh

et al. 2019

Sci Rep

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Arsenic contamination of groundwater is a serious concern worldwide. The research gaps in removing arsenic are selectivity, regeneration and effective removal rate at neutral pH levels. In this study, we discussed the reasons of the high arsenic adsorption from groundwater of our previously developed adsorbent, a cationic polymer gel, N,N -dimethylamino propylacrylamide, methyl chloride quaternary (DMAPAAQ), loaded with iron hydroxide. We used a transmission electron microscope (TEM) and thermogravimetric analyser (TGA) to detect the iron contents in the gel and ensure its maximum impregnation. We found that the gel contains 62.05% FeOOH components. In addition, we used the Mössbauer spectroscopy to examine the type of impregnated iron in the gel composite and found that it was γ-FeOOH. Finally, we used Fourier transform infrared spectroscopy (FTIR) to examine the surface functional groups present in the gel and the differences in those groups before and after iron impregnation. Similarly, we also investigated the differences of the surface functional groups in the gel, before and after the adsorption of both forms of arsenic. To summarize, this study described the characteristics of the gel composite, which is selective in adsorption and cost effective, however further applications should be investigated.

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Section: Introductionmentioning

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The effect of γ-FeOOH on enhancing arsenic adsorption from groundwater with DMAPAAQ + FeOOH gel composite

Safi

Senmoto

Gotoh

et al. 2019

Sci Rep

Self Cite

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“…Therefore, limiting the concentration of arsenic in water is extremely urgent and significant to reduce the harm of arsenic. Generally speaking, the treatment methods for arsenic pollution in water can be divided into the chemical precipitation method, ion exchange method, membrane separation method, electrochemical method, and adsorption method [14,15,16]. Compared with the other methods, the adsorption method is widely used because of the advantages of a wide source of raw materials, easy operation and high efficiency, etc.…”

Section: Introductionmentioning

confidence: 99%

A Comparison Study on the Arsenate Adsorption Behavior of Calcium-Bearing Materials

Wang

Hong

2019

Materials

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The calcium-bearing adsorbents are widely used in the treatment of arsenic-containing wastewater due to their excellent treatment effect and economy. In order to obtain high-efficient adsorbents for arsenate (As(V)) removal, the adsorption behavior of calcium oxide (CaO), calcium fluoride (CaF2) and calcium carbonate (CaCO3) on As(V) in aqueous solution at different concentrations were explored. The adsorption mechanism was also explored based on surface characteristics: morphology, specific surface area, as well as their effective calcium content. Not only that, the chemical stability of these materials was further studied. Results exhibited that the As(V) removal capability of these materials is in the following order, CaO > CaF2 > CaCO3. When CaO served as an absorbent, As(V) with initial concentration of 0.2 mg/L can be reduced to 0.383 × 10−3 mg/L in 10 min. Moreover, the capabilities of CaO, CaF2 and CaCO3 for removing As(V) are positively correlated with their effective calcium content in aqueous solution, which provide the basis for selecting calcium-bearing materials with excellently comprehensive properties for the field of As(V) removal in aqueous solution. What’s more, all three materials exhibit great chemical stability after adsorption of As(V).

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Synthesis and Sorption Profiles of Graphene‐Decorated Silane‐Modified Layered Clays for As(V) Removal: A Quantitative Assessment and Mechanistic Insights

Mahesh,

Pavitha,

Sumi

et al. 2024

ChemistrySelect

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A novel adsorbent material, graphene decorated silane modified layered clays enriched with Fe(III) (TEOS‐g‐LDH−Fe/rGO) was prepared via emulsion polymerization followed by in situ precipitation and its physicochemical characterization carried out by FTIR, XRD, SEM‐EDS, HRTEM, TG‐ DTG, XPS and Raman analysis. The TEOS‐g‐LDH−Fe/rGO composite utilized for the effective removal of As(V) from aqueous system and the process followed via inner‐sphere surface complexation through ligand exchange between hydroxyl groups in TEOS‐g‐LDH−Fe/rGO and As(V) species. The equilibrium data fitted well with Langmuir model and kinetic data with mixed batch model showed remarkable adsorption capacity of 103.91 mg/g at pH 5.5. The synergistic effects associated with precursors in the composite profoundly improved the removal efficiency of As(V). The optimal conditions for As(V) removal was evaluated by RSM coupled with central composite design(CCD) considering pH(3–6), dose(0.5–2.5) and time (1–80 min) at temperature 30 °C. The sorption efficacy of TEOS‐g‐LDH−Fe/rGO was found to be about four times greater than its precursors. In simulated water matrix, the TEOS‐g‐LDH−Fe/rGO exhibit a retention of sorption performance (90 %) from 98.8 % of its initial sorption capacity for As(V) removal during regeneration. This work proves TEOS‐g‐LDHFe/rGO as a promising candidate for addressing grievous environmental threats from arsenic contamination.

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Development and regeneration of composite of cationic gel and iron hydroxide for adsorbing arsenic from ground water

Cited by 33 publications

References 49 publications

The effect of γ-FeOOH on enhancing arsenic adsorption from groundwater with DMAPAAQ + FeOOH gel composite

The effect of γ-FeOOH on enhancing arsenic adsorption from groundwater with DMAPAAQ + FeOOH gel composite

A Comparison Study on the Arsenate Adsorption Behavior of Calcium-Bearing Materials

Synthesis and Sorption Profiles of Graphene‐Decorated Silane‐Modified Layered Clays for As(V) Removal: A Quantitative Assessment and Mechanistic Insights

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