Facile synthesis of flowered mesoporous graphene oxide-lanthanum fluoride nanocomposite for adsorptive removal of arsenic

Lingamdinne, Lakshmi Prasanna; Koduru, Janardhan Reddy; Chang, Yoon-Young; Kang, Sungmin; Yang, Jae‐Kyu

doi:10.1016/j.molliq.2019.01.103

Cited by 54 publications

(26 citation statements)

References 52 publications

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“…Significant adsorption capacities that occurred even when pH pzc values are higher than the solution pH show that not only electrostatic interaction but also ion exchange and surface complexation are effective in arsenate adsorption on composites. Similar results were obtained in previous studies on arsenic adsorption with GO-based composite materials (Lingamdinne et al 2019;Wang et al 2014).…”

Section: Effect Of Phsupporting

confidence: 91%

“…Therefore, it was concluded that the pseudo second order kinetic model provides a very good correlation in arsenate adsorption on GOFeZA and GOFeZB. Consequently, arsenate adsorption on GOFeZA and GOFeZB was better explained by rate-controlled kinetics and arsenate adsorption is controlled by the presence of the surface areas on GOFeZA and GOFeZB rather than by arsenate concentration in aqueous solution (Lingamdinne et al 2019;Yoon et al 2017).…”

Section: Adsorption Kineticsmentioning

confidence: 98%

“…The pH value of the solution is effective in protonating or deprotonating of the adsorbent surface (Sherlala et al 2019). Although the arsenate species are negatively charged in all cases where the pH value is above 2.2, the monovalent form of arsenate is dominant if the pH is less than 6.9 and the divalent form of arsenate is dominant if the pH is greater than 6.9 (Lingamdinne et al 2019;Yoon et al 2017). In extreme acidic and alkaline conditions, uncharged and trivalent forms of arsenate are dominant, respectively.…”

Section: Effect Of Phmentioning

confidence: 99%

“…Graphene-based composite materials have found great approval in many environmental remediation applications, notably their use as adsorbents for the purification of water (Soni and Shukla 2019). Many researchers used GO-based composite materials such as GO-copper ferrite (Wu et al 2018), GO-lanthanum fluoride (Lingamdinne et al 2019), GO-iron oxide (Su et al 2017), GO-ferric hydroxide (Zhang et al 2010), and GO-magnetite (Yoon et al 2016) to remove arsenic from water. However, there are only a few studies on the synthesis of GO-based composite materials using zeolite and its use for arsenic removal from waters.…”

Section: Introductionmentioning

confidence: 99%

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Removal of arsenate using graphene oxide-iron modified clinoptilolite-based composites: adsorption kinetic and column study

Baskan

Hadimlioglu²

2021

J Anal Sci Technol

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In this study, graphene oxide (GO), iron modified clinoptilolite (FeZ), and composites of GO-FeZ (GOFeZA and GOFeZB) were synthesized and characterized using SEM, EDS, XRF, FTIR, and pHpzc. The arsenate uptake on composites of GOFeZA and GOFeZB was examined by both kinetic and column studies. The adsorption capacity increases with the increase of the initial arsenate concentration at equilibrium for both composites. At the initial arsenate concentration of 450 μg/L, the arsenate adsorption on GOFeZA and GOFeZB was 557.86 and 554.64 μg/g, respectively. Arsenate adsorption on both composites showed good compatibility with the pseudo second order kinetic model. The adsorption process was explained by the surface complexation or ion exchange and electrostatic attraction between GOFeZA or GOFeZB and arsenate ions in the aqueous solution due to the relatively low equilibrium time and fairly rapid adsorption of arsenate at the beginning of the process. The adsorption mechanism was confirmed by characterization studies performed after arsenate was loaded onto the composites. The fixed-bed column experiments showed that the increasing the flow rate of the arsenate solution through the column resulted in a decrease in empty bed contact time, breakthrough time, and volume of treated water. As a result of the continuous operation column study with regenerated GOFeZA, it was demonstrated that the regenerated GOFeZA has lower breakthrough time and volume of treated water compared to fresh GOFeZA.

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Section: Effect Of Phsupporting

confidence: 91%

Section: Adsorption Kineticsmentioning

confidence: 98%

Section: Effect Of Phmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Removal of arsenate using graphene oxide-iron modified clinoptilolite-based composites: adsorption kinetic and column study

Baskan

Hadimlioglu²

2021

J Anal Sci Technol

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“…Fe 3 C@C has magnetic remanence and coercivity values somewhat similar with those of "superparamagnetic" Fe 3 O 4 nanoparticles found in literature [29,31]. A variety of magnetic carbon-based absorbents such as graphene oxide nickel ferrite, multiwalled carbon nanotubes/ironoxide composites, magnetic biochar, and carbon encapsulated maghemite/magnetite, etc., are used for arsenic and heavy metal adsorption due to their facile magnetic recovery and the adsorptive prowess of carbon [13,[37][38][39][40][41][42][43][44][45][46][47][48][49]. However, none-to the authors knowledge-have studied Fe 3 C@C for arsenic removal in simulated drinking water.…”

Section: Introductionmentioning

confidence: 99%

Magnetically recoverable carbon-coated iron carbide with arsenic adsorptive removal properties

et al. 2020

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Magnetic particles, generally nanostructured and magnetite-based, have been studied extensively to remove drinking water contaminants. Compositions beyond Fe 3 O 4 could address long-standing issues of magnetic recoverability and materials integrity in drinking waters. Herein carbon-coated iron carbide (Fe 3 C@C) were studied for the first time for their stability, magnetic characteristics, magnetic separability, and arsenic adsorptive properties. Experimental results show that (i) Fe 3 C@C with a 9-nm thick graphitic shell is chemically stable in simulated drinking water; (ii) is ferromagnetic with small magnetic remanence and a magnetic saturation that is ~ 2 × greater than Fe 3 O 4 ; (iii) can be separated from water magnetically under continuous-flow conditions with greater than 99% recovery; and (iv) has a surface area-normalized adsorption capacity for arsenic (6.75 µg/m 2) of the same order of magnitude as that of Fe 3 O 4 (9.62 µg/m 2). Fe 3 C@C can be a viable alternative to Fe 3 O 4 with further development, for the magnetic removal of arsenic and other contaminants from drinking water sources. Graphic abstract A comparative look at the chemical stability, adsorptive prowess, and magnetic capturability of nanostructured carbon-coated iron carbide for arsenic removal from simulated drinking water.

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Graphene and Graphene-Based Nanocomposites: From Synthesis to Applications

Kewat,

Sharma,

Sidiqi

et al. 2023

Indian Institute of Metals Series

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Facile synthesis of flowered mesoporous graphene oxide-lanthanum fluoride nanocomposite for adsorptive removal of arsenic

Cited by 54 publications

References 52 publications

Removal of arsenate using graphene oxide-iron modified clinoptilolite-based composites: adsorption kinetic and column study

Removal of arsenate using graphene oxide-iron modified clinoptilolite-based composites: adsorption kinetic and column study

Magnetically recoverable carbon-coated iron carbide with arsenic adsorptive removal properties

Graphene and Graphene-Based Nanocomposites: From Synthesis to Applications

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