Mechanochemical versus chemical routes for graphitic precursors and their performance in micropollutants removal in water

Mahmoud, Alaa El Din; Franke, Marcus; Stelter, Michael; Braeutigam, Patrick

doi:10.1016/j.powtec.2020.02.073

Cited by 43 publications

(11 citation statements)

References 60 publications

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“…Nanotechnology has gained more attention since the synthesized materials are on the nanoscale that differ in chemical and physical properties from those of bulk materials. This allows the integration of nanomaterials in environmental 1 , 2 , medicinal 3 , and agricultural 4 applications.…”

Section: Introductionmentioning

confidence: 99%

Green copper oxide nanoparticles for lead, nickel, and cadmium removal from contaminated water

Mahmoud

Al-Qahtani

Alflaij

et al. 2021

Sci Rep

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152

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Environmentally friendly copper oxide nanoparticles (CuO NPs) were prepared with a green synthesis route without using hazardous chemicals. Hence, the extracts of mint leaves and orange peels were utilized as reducing agents to synthesize CuO NPs-1 and CuO NPs-2, respectively. The synthesized CuO NPs nanoparticles were characterized using scanning electron microscopy (SEM), Energy Dispersive X-ray Analysis (EDX), BET surface area, Ultraviolet–Visible spectroscopy (UV–Vis), and Fourier Transform Infrared Spectroscopy (FT-IR). Various parameters of batch experiments were considered for the removal of Pb(II), Ni(II), and Cd(II) using the CuO NPs such as nanosorbent dose, contact time, pH, and initial metal concentration. The maximum uptake capacity (qm) of both CuO NPs-1 and CuO NPs-2 followed the order of Pb(II) > Ni(II) > Cd(II). The optimum qm of CuO NPs were 88.80, 54.90, and 15.60 mg g−1 for Pb(II), Ni(II), and Cd(II), respectively and occurred at sorbent dose of 0.33 g L−1 and pH of 6. Furthermore, isotherm and kinetic models were applied to fit the experimental data. Freundlich models (R2 > 0.97) and pseudo-second-order model (R2 > 0.96) were fitted well to the experimental data and the equilibrium of metal adsorption occurred within 60 min.

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Section: Introductionmentioning

confidence: 99%

Green copper oxide nanoparticles for lead, nickel, and cadmium removal from contaminated water

Mahmoud

Al-Qahtani

Alflaij

et al. 2021

Sci Rep

Self Cite

152

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“…Another spectroscopy technique is Raman spectra which is used to identify and characterize carbon-based nanomaterials [2,4]. It is considered as fingerprint spectra to distinct between the broad range of carbon nanomaterials.…”

Section: Addition Of Natural Reducing Agents Either Drop By Drop or Cmentioning

confidence: 99%

“…It is estimated that~884 million people worldwide lack access to clean and safe water. Besides, there are wastewater from different industrial sectors, including heavy metals [32][33][34], dyes [35], and organic pollutants [3,4] which discharge without proper treatment to the water bodies. Nowadays, engineered nanomaterials (ENMs) are used in various products and applications that are continuing to be developed.…”

Section: Green Nanomaterials For Water Purificationsmentioning

confidence: 99%

“…Various synthesis routes were stated for the synthesis of metal-based nanomaterials, for instance, solvothermal, hydrothermal, precipitation, sol-gel, microwave, mechanochemical, and green techniques. The mentioned synthesis routes except green techniques require harsh experimental conditions with large volume of toxic chemicals as reducing and capping agents, expensive equipment, and energy consumption [4]. Therefore, sustainable and green technologies are developed to enhance the synthesis of metal-based nanomaterials.…”

Section: Nanomaterialsmentioning

confidence: 99%

“…The application of GO is still promising and investigated in water/wastewater management. Its mechanism for removal of various pollutants depends on the sorbate's structure and the adsorptive sites of the sorbent (GO) [4].…”

Section: Carbon-based Nanomaterialsmentioning

confidence: 99%

See 2 more Smart Citations

Nanomaterials: Green Synthesis for Water Applications

Mahmoud

2020

Handbook of Nanomaterials and Nanocomposites for Energy and Environmental Applications

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Future environmental applications require the integration of green and sustainable nanomaterials. Hence, this chapter highlights the basics of nanotechnology and summarizes the synthesis of green nanomaterials compared to the conventional routes of nanomaterials. Nano-characterization techniques have been classified to identify/confirm the synthesized nanomaterials. A comprehensive overview about zerovalent metal nanomaterials, metal-based nanomaterials, carbonaceous nanomaterials, and nanocomposites is explored. The optimum parameters and conditions are studied. Furthermore, green synthesis mechanisms of some nanomaterials are discussed. Subsequent to an overview of various green nanomaterials, their integration for various pollutants' removal is presented.

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