Efficient removal of arsenic using graphene-zeolite based composites

Khatamian, M.; Khodakarampoor, N.; Saket-Oskoui, M.

doi:10.1016/j.jcis.2017.03.052

Cited by 76 publications

(24 citation statements)

References 27 publications

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“…The diffraction peak of graphite at 26° corresponded to an interplanar spacing of (002) hexagonal layers of carbon atoms (d002 = 3.36A) 31 . However, this peak was absent in graphene oxide (GO), and another peak diffraction appeared at the range 9.0-11.20°, corresponding to (001) plane of GO 32 . The change in the XRD diffraction peak from 26° to 10° indicates the transformation of graphite into graphene oxide 33,34 .…”

Section: Resultsmentioning

confidence: 99%

Nanoremediation of As and metals polluted soils by means of graphene oxide nanoparticles

Baragaño

Forján

Welte

et al. 2020

Sci Rep

111

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the capacity of graphene oxide nanoparticles (nGox) to reduce or increase As and metals availability in polluted soils was compared with that of zero valent iron nanoparticles (nZVi). the nanomaterials used in this study were characterized by X-ray techniques, cHnS-o analysis, dynamic light scattering, and microscopy procedures such as atomic force microscopy. to assess the capacity of these materials to immobilize pollutants, field samples of two soils were treated with nZVI and nGOx at a range of doses (0.2%, 1% and 5%). Availability tests were then performed. nGOx effectively immobilized Cu, Pb and cd, but mobilized As and p (even at low doses), in the latter case irrespective of the simultaneous presence of high concentrations of metals. in turn, nZVi promoted notable immobilization results for As and pb, a poorer result for cd, and an increased availability for cu. Soil pH and ec have been slightly affected by nGOx. On the whole, nGOx emerges as a promising option for mobilization/immobilization strategies for soil nanoremediation when combined with other techniques such as phytoremediation. Industrial activities have released large amounts of metals (Cu, Cd, Pb, Zn, etc.) and metalloids (especially As) into the environment and caused serious damage to the ecosystem 1. In addition, metals and metalloids can endanger human health, as many of them are toxic even at very low concentrations, and even carcinogenic (e.g. As) and mutagenic 2. Unlike organic pollutants that can degrade into harmless small molecules, the abovementioned inorganic pollutants are recalcitrant to many biochemical reactions and thus particularly difficult to remove from soils 3. Regarding As, several studies have confirmed that between 52,000 and 112,000 tons of this metalloid are released into the environment every year 1,4,5. Many diseases, such as lung cancer, skin cancer, bladder cancer, etc., can be caused by contact with As 6,7. Given that As is highly toxic for humans, and also for plants and animals, it has been classified as a priority hazardous pollutant. Unlike the aforementioned metals, As is an anionic contaminant. In this regard, simultaneous remediation of soils affected by anionic and cationic contaminants is a challenge 8 ; i.e., As remediation is even more complex in contexts of concurrent pollution with metals. In fact, classical remediation approaches attempt, among other objectives, to raise the pH of soils contaminated with cationic metals and thus stabilize them. However, this approach causes As to be solubilized 9. Overall, the various remediation strategies available focus on the disjuncture between immobilization and mobilization of the pollutants 10. Soil nanoremediation by means of Fe-nanoparticles (nZVI) simultaneously reduces the availability of As and metals in polluted soils, as shown in recent pilot-scale in situ trials 11 , and by means of hybrid soil-washing techniques 12. nZVI have a Fe° core surrounded by an oxide/hydroxide shell, which grows thicker as iron oxidation progresses. In addition, nZVI pres...

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Section: Resultsmentioning

confidence: 99%

Nanoremediation of As and metals polluted soils by means of graphene oxide nanoparticles

Baragaño

Forján

Welte

et al. 2020

Sci Rep

111

View full text Add to dashboard Cite

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“…Iron oxides (mostly Fe 3 O 4 ), copper oxides, etc. were used with GO or rGO in the nanocomposites [ 202 , 203 , 204 , 205 , 206 ], some organic compounds such as epoxy, aminopyrazole, EDTA-Chitosan, Imino-Thiobiuret, etc. [ 201 , 207 , 208 , 209 ] and inorganic compounds like LD-Hydroxide, silica, etc.…”

Section: Nanofiltration Membrane Fabrication Process: Limitations mentioning

confidence: 99%

Nanofiltration for Arsenic Removal: Challenges, Recent Developments, and Perspectives

2020

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Arsenic (As) removal is of major significance because inorganic arsenic is highly toxic to all life forms, is a confirmed carcinogen, and is of significant environmental concern. As contamination in drinking water alone threatens more than 150 million people all over the world. Therefore, several conventional methods such as oxidation, coagulation, adsorption, etc., have been implemented for As removal, but due to their cost-maintenance limitations; there is a drive for advanced, low cost nanofiltration membrane-based technology. Thus, in order to address the increasing demand of fresh and drinking water, this review focuses on advanced nanofiltration (NF) strategy for As removal to safeguard water security. The review concentrates on different types of NF membranes, membrane fabrication processes, and their mechanism and efficiency of performance for removing As from contaminated water. The article provides an overview of the current status of polymer-, polymer composite-, and polymer nanocomposite-based NF membranes, to assess the status of nanomaterial-facilitated NF membranes and to incite progress in this area. Finally, future perspectives and future trends are highlighted.

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“…Centrifugation, sedimentation, filtration, and other traditional separation methods deem to be ineffective and time consuming. On the other hand, magnetic GO (mGO) is synthesized via impregnation or co-precipitation methods [23][24][25][26][27] and can be easily separated by the aid of magnetic materials like Fe 3 O 4 or Fe 3 S 4. mGO is synthesized via impregnation or co-precipitation methods [23][24][25][26][27]. In the co-precipitation method, mGO is synthesized via the hydrothermal process by an in-situ reduction/decomposition of a metal precursor such as Fe 3 O 4, FeSO 4 , Fe(NO) 3 , or iron acetate on the surface of dispersed GO under sonication, see Figure 4.…”

Section: Magnetic Nanocomposites and Nanocomposites With Other Metalsmentioning

confidence: 99%

“…Wen et al [29] incubated GO into a simulated body fluid for 7 days to ensure mineral growth, which resulted in GO-hydroxyapatite (GO-MWCNT-PDA) 3D flower-like composite. Khatamian et al [23] fabricated Fe 3 O 4 /GO/Cu-ZEA via solid state dispersion of Cu-ZEA and Fe 3 O 4 into GO suspension followed by sonication. Lingamdinne et al [30] mixed Hydrazine hydrate, iron and nickel with GO and heated to 120 • C to make rGO-Nickel Ferrite nanocomposite (rGO-NiFerrite NC).…”

Section: Graphene Hybrids With Polymersmentioning

confidence: 99%

Recent Advances in Applications of Hybrid Graphene Materials for Metals Removal from Wastewater

2020

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The presence of traces of heavy metals in wastewater causes adverse health effects on humans and the ecosystem. Adsorption is a low cost and eco-friendly method for the removal of low concentrations of heavy metals from wastewater streams. Over the past several years, graphene-based materials have been researched as exceptional adsorbents. In this review, the applications of graphene oxide (GO), reduce graphene oxide (rGO), and graphene-based nanocomposites (GNCs) for the removal of various metals are analyzed. Firstly, the common synthesis routes for GO, rGO, and GNCs are discussed. Secondly, the available literature on the adsorption of heavy metals including arsenic, lead, cadmium, nickel, mercury, chromium and copper using graphene-based materials are reviewed and analyzed. The adsorption isotherms, kinetics, capacity, and removal efficiency for each metal on different graphene materials, as well as the effects of the synthesis method and the adsorption process conditions on the recyclability of the graphene materials, are discussed. Finally, future perspectives and trends in the field are also highlighted.

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Efficient removal of arsenic using graphene-zeolite based composites

Cited by 76 publications

References 27 publications

Nanoremediation of As and metals polluted soils by means of graphene oxide nanoparticles

Nanoremediation of As and metals polluted soils by means of graphene oxide nanoparticles

Nanofiltration for Arsenic Removal: Challenges, Recent Developments, and Perspectives

Recent Advances in Applications of Hybrid Graphene Materials for Metals Removal from Wastewater

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