Aluminum and iron doped graphene for adsorption of methylated arsenic pollutants

Cortés‐Arriagada, Diego; Toro–Labbé, Alejandro

doi:10.1016/j.apsusc.2016.05.154

Cited by 60 publications

(21 citation statements)

References 64 publications

(82 reference statements)

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“…Two main conformations were found for methylarsenicals onto Phos and PhosO nanoadsorbents (Fig. [16]; the adsorption mechanism is mainly related to monodentate complexation of the pollutant due to bond formation between oxygen and the doping metal.…”

Section: Adsorption Of Trivalent Methylarsenicalsmentioning

confidence: 99%

“…In this regard, two-dimensional 2D materials are a useful alternative for drinking water treatment via physical/chemical adsorption of arsenic pollutants, favored by their high surface area, high adsorption capacity, and high recovery and reusability [10,11]. As an illustration, activated carbons and graphene-based materials have been demonstrated as potential materials for arsenic removal removing with a high adsorptive capacity for a large number of compounds (Scheme 1b-c) [12,13,[22][23][24][14][15][16][17][18][19][20][21], where the hydrophobicity, recyclability, and adsorption capacity of nanostructured intrinsic surfaces can be remarkably enhanced by surface treatments and oxidation process [25].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effective Removal of Water-Soluble Methylated Arsenic Contaminants with Phosphorene Oxide Nanoflakes: A DFT Study

Wrighton-Araneda¹,

Ortega²,

Cortés‐Arriagada³

2021

Preprint

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Section: Adsorption Of Trivalent Methylarsenicalsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effective Removal of Water-Soluble Methylated Arsenic Contaminants with Phosphorene Oxide Nanoflakes: A DFT Study

Wrighton-Araneda¹,

Ortega²,

Cortés‐Arriagada³

2021

Preprint

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“…In order to prevent these health problems, the guideline on arsenic concentration in drinking water has become gradually stricter over the last decades. As a result of this, many countries have set the maximum allowable arsenic concentration in drinking water to 10 μg/L adopted by the World Health Organization (WHO) and US Environmental Protection Agency (Wu et al 2018;Cortes-Arriagada and Toro-Labbe 2016;Zhu et al 2018). Therefore, researches on the use of more effective and economical methods or materials for removing arsenic from water are very important and necessary.…”

Section: Introductionmentioning

confidence: 99%

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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“…Zeolite is commonly used as a catalyst in various acid catalyst reactions [6]- [9]. The adsorption method is an alternative method to minimize the presence of pollutants in the environment [10]- [14]. Moreover, by synthesizing the zeolite via co-precipitation method and combining it with the acid, such as hydrochloric acid (HCl), it can give a significant effect, since hydrochloric acid is known as an acid capable of dissolving inorganic compounds [15], [16].…”

Section: Introductionmentioning

confidence: 99%

The Fabrication of Natural Zeolite Via Co-Precipitation Method as Cu, Pb and Zn Metal Absorbent

Sirait

Saragih

Nurfajriani

et al. 2020

Latvian Journal of Physics and Technical Sciences

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AbstractHeavy metal waste is very dangerous, which can change the condition of water into a solid substance that can be suspended in water and can reduce the cleanliness level of water consumed by living things. To date, heavy metals can be managed through several processes, namely physics, biology or chemistry. One of the ways to overcome heavy metal pollution is to use natural zeolite applying a co-precipitation method, as it is known that zeolite is a powerful natural material to be used for certain purposes. In order to justify the research results, several analyses have been performed, such as X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Surface Area Analyser (SAA), and Atomic Adsorption Spectrophotometric (AAS). From the XRD results, it has been found out that the size of each zeolite with variations in size of 150 mesh, 200 mesh, and 250 mesh is 29.274 nm, 38.665 nm and 43.863 nm, respectively. Moreover, the SEM-EDX has shown that the zeolite under consideration is a type of Na-Zeolite and that the co-precipitation method successfully removes impurity elements, namely, Fe, Ti, and Cl. The results of SAA testing have indicated that the total surface area for each variation of zeolite sizes is 63.23 m2/g, 45.14 m2/g and 59.76 m2/g. The results of the AAS test analysis have demonstrated that the optimal absorption of metal content is observed in a size of 150 mesh zeolite with adsorption power of 99.6 % for Pb metal, 98 % for Cu metal, and 96 % Zn metal.

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Aluminum and iron doped graphene for adsorption of methylated arsenic pollutants

Cited by 60 publications

References 64 publications

Effective Removal of Water-Soluble Methylated Arsenic Contaminants with Phosphorene Oxide Nanoflakes: A DFT Study

Effective Removal of Water-Soluble Methylated Arsenic Contaminants with Phosphorene Oxide Nanoflakes: A DFT Study

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

The Fabrication of Natural Zeolite Via Co-Precipitation Method as Cu, Pb and Zn Metal Absorbent

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