Efficient adsorptive removal of Tetramethylammonium hydroxide (TMAH) from water using graphene oxide

Chang, Shuchih Ernest; Lin, Kun‐Yi Andrew; Lu, Chungsying

doi:10.1016/j.seppur.2014.06.050

Cited by 42 publications

(10 citation statements)

References 37 publications

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“…The I D /I G ratios for the B1, B2 and graphene are 1.03, 1.00 and 0.52, respectively. The higher I D /I G ratio in biochars suggests that biochars possessed fewer aromatic rings structures and more carbon-containing defects that led to the formation of oxygen-containing functional groups on the surface of biochars 40 . In addition, according to analysis of the elements and functional groups of graphene by SEM, graphene was relatively pure, containing only C and O elements (hydrogen was not be detected), and the atomic percentages were 98.17% and 1.83%, respectively.…”

Section: Resultsmentioning

confidence: 99%

Adsorption of Antibiotics on Graphene and Biochar in Aqueous Solutions Induced by π-π Interactions

Peng

Chen

Que

et al. 2016

Sci Rep

213

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The use of carbon based materials on the removal of antibiotics with high concentrations has been well studied, however the effect of this removal method is not clear on the actual concentration of environments, such as the hospital wastewater, sewage treatment plants and aquaculture wastewater. In this study, experimental studies on the adsorption of 7 antibiotics in environmental concentration of aqueous solutions by carbon based materials have been observed. Three kinds of carbon materials have shown very fast adsorption to antibiotics by liquid chromatography–tandem mass spectrometry (LC-MS-MS) detection, and the highest removal efficiency of antibiotics could reach to 100% within the range of detection limit. Surprisedly, the adsorption rate of graphene with small specific surface area was stronger than other two biochar, and adsorption rate of the two biochar which have approximate specific surface and different carbonization degree, was significantly different. The key point to the present observation were the π-π interactions between aromatic rings on adsorbed substance and carbon based materials by confocal laser scanning microscope observation. Moreover, adsorption energy markedly increased with increasing number of the π rings by using the density functional theory (DFT), showing the particular importance of π-π interactions in the adsorption process.

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Section: Resultsmentioning

confidence: 99%

Adsorption of Antibiotics on Graphene and Biochar in Aqueous Solutions Induced by π-π Interactions

Peng

Chen

Que

et al. 2016

Sci Rep

213

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“…using GO to remove tetramethylammonium hydroxide (TMAH) from water found the oxygen-containing groups present on the surface of GO had a strong affinity for absorbing TMAH. Their study also revealed the ion exchange between TMA + ions in solution and H + ions of the oxygen-containing functional groups present on the surface of GO, as well as electrostatic attraction, were the factors contributing to the adsorption mechanism 52 .…”

Section: Resultsmentioning

confidence: 99%

Synthesis, characterisation and thermo-physical properties of highly stable graphene oxide-based aqueous nanofluids for potential low-temperature direct absorption solar applications

sa-ard

Fawcett

Fung

et al. 2021

Sci Rep

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Two types of highly stable 0.1% graphene oxide-based aqueous nanofluids were synthesised and investigated. The first nanofluid (GO) was prepared under the influence of ultrasonic irradiation without surfactant. The second nanofluid was treated with tetra ethyl ammonium hydroxide to reduce the graphene oxide to form reduced graphene oxide (RGO) during ultrasonic irradiation. The GO and RGO powders were characterised by various techniques such as field emission scanning electron microscopy, transmission electron microscopy, X-ray diffraction and Raman. Also UV–visible absorption spectroscopy was carried out and band gap energies were determined. Optical band gap energies for indirect transitions ranged from 3.4 to 4.4 eV and for direct transitions they ranged between 2.2 and 3.7 eV. Thermal conductivity measurements of the GO-based aqueous nanofluid revealed an enhancement of 9.5% at 40 °C compared to pure water, while the RGO-based aqueous nanofluid at 40 °C had a value 9.23% lower than pure water. Furthermore, the photothermal response of the RGO-based aqueous nanofluid had a temperature increase of 13.5 °C, (enhancement of 60.2%) compared to pure water, the GO-based aqueous nanofluid only displayed a temperature rise of 10.9 °C, (enhancement of 46.6%) after 20 min exposure to a solar irradiance of 1000 W m−2. Both nanofluid types displayed good long-term stability, with the GO-based aqueous nanofluid having a zeta potential of 30.3 mV and the RGO-based aqueous nanofluid having a value of 47.6 mV after 6 months. The good dispersion stability and photothermal performance makes both nanofluid types very promising working fluids for low-temperature direct absorption solar collectors.

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“…High concentrations of TMAH solutions from factories could be physicochemically recovered and recycled, while wastewater containing lower concentrations of TMAH (in the order of hundreds of mg/L) can be treated in wastewater treatment facilities [9,12]. Common treatment processes for nitrogen-containing wastewater include adsorption [13][14][15], biological processes [9,11], ozonation [16], chemical oxidation [17], electrodialysis [18], and UV/persulfate [19,20]. Although wastewater containing high concentrations of TMAH can be treated by Fenton oxidation and catalytic oxidation processes, costs of these processes can be very high [11].…”

Section: Introductionmentioning

confidence: 99%

Assessment of an MnCe-GAC Treatment Process for Tetramethylammonium-Contaminated Wastewater from Optoelectronic Industries

et al. 2019

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Nitrogen-containing wastewater is an important issue in optoelectronic and semiconductor industries. Wastewater containing nitrogen compounds such as ammonium, monoethanolamine (MEA), and tetramethylammonium hydroxide (TMAH) must be properly treated due to concerns about health and environmental effects. MnCe-GAC (granular activated carbon) processes were developed in this study for the treatment of TMAH-contaminated wastewater in high-tech industries. The MnCe-GAC processes could effectively remove ammonium, MEA, and TMAH from aqueous solutions. The removal efficiencies of ammonium and MEA by these processes were better than observed for TMAH. Parameters affecting TMAH removal such as type of process, type of wastewater (synthetic or real), pH, salts, and t-butanol were investigated. In general, removal efficiencies of TMAH by various processes were in the following order: MnCe-GAC/O3/H2O2 > MnCe-GAC/O3 > MnCe-GAC/H2O2 > MnCe-GAC > GAC. The negative effect of sulfate and nitrate on pollutant removal might be due to the salting-out effect. Based on t-butanol experiments, the main degradation mechanisms of TMAH by the MnCe-GAC/O3/H2O2 process likely involved hydroxyl radicals. The process proposed in this study could be an effective alternative method for the treatment of high-tech industrial wastewater to meet the new TMAH discharge limit.

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Efficient adsorptive removal of Tetramethylammonium hydroxide (TMAH) from water using graphene oxide

Cited by 42 publications

References 37 publications

Adsorption of Antibiotics on Graphene and Biochar in Aqueous Solutions Induced by π-π Interactions

Adsorption of Antibiotics on Graphene and Biochar in Aqueous Solutions Induced by π-π Interactions

Synthesis, characterisation and thermo-physical properties of highly stable graphene oxide-based aqueous nanofluids for potential low-temperature direct absorption solar applications

Assessment of an MnCe-GAC Treatment Process for Tetramethylammonium-Contaminated Wastewater from Optoelectronic Industries

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