Thermal plasma processing of <i>Moringa oleifera</i> biochars: adsorbents for fluoride removal from water

Gourai, M.; Nayak, A.; Nial, Partha S.; Satpathy, B. K.; Bhuyan, Rajashree; Singh, Saroj Kumar; Subudhi, Umakanta

doi:10.1039/d2ra07514h

Cited by 12 publications

(3 citation statements)

References 45 publications

(54 reference statements)

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“…FESEM is the most versatile technique to observe a sample's surface morphology and was performed using the JEOL JSM‐7610F Plus model of scanning electron microscope (Gourai et al ., 2023).…”

Section: Methodsmentioning

confidence: 99%

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Structural, thermal, techno‐functional and chemical characterization using Fourier Transform Infrared Spectroscopy, Gas‐Chromatography‐Mass Spectrophotometry, Thermogravimetric Analyser, Field Emission Scanning Electron Microscopy and Energy‐Dispersive X‐Ray Spectrometer of Moringa Oleifera flower powder

Jaglan,

Kaushik,

Kumar

et al. 2023

Int J of Food Sci Tech

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SummaryThe aim of this research is to characterise the physicochemical and techno‐functional properties of the Moringa oleifera flower powder, and various techniques were used in this regard, such as FTIR, GC–MS, TGA, FESEM, and EDS. The bulk and tapped density of the Moringa oleifera flower powder were found to be 0.44 ± 0.03 (g/cm3) and 0.51 ± 0.01 (g/cm3), respectively. The water absorption index and water solubility index were 10.60 ± 0.10 (g/g) and 8.70 ± 0.20 (%), respectively. The foaming capacity was found to be 15.20 ± 0.20 (%), and the foaming stability was 56.34 ± 0.10 (%). The total phenolic content of the Moringa oleifera flower extract was 15.97 ± 0.223 mg GAE/g, whereas the flavonoid content was 12.38 ± 0.321 mg QE/g. The antioxidant activity of the flower extract was measured by DPPH assay and was found to be 59.65%. The flower extract showed 11 mm and 8 mm of the zone of inhibition against Escherichia coli and Staphylococcus aureus, respectively, whereas, with antibiotic streptomycin, the zones of inhibition were found to be 20 and 18 mm, respectively. Based on the research findings, Moringa oleifera flower powder and extract can be used as food fortification, antioxidant, and antibacterial agents.

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Section: Methodsmentioning

confidence: 99%

“…Gold coating were added to the sample to provide electrical conductivity because it provides high‐resolution images of the metals. In EDS, the elemental analysis was performed using OXFORD EDS, which measured the intensity of the X‐ray signals generated by the electron beam when it struck the surface of the sample (Gourai et al ., 2023).…”

Section: Methodsmentioning

confidence: 99%

Structural, thermal, techno‐functional and chemical characterization using Fourier Transform Infrared Spectroscopy, Gas‐Chromatography‐Mass Spectrophotometry, Thermogravimetric Analyser, Field Emission Scanning Electron Microscopy and Energy‐Dispersive X‐Ray Spectrometer of Moringa Oleifera flower powder

Jaglan,

Kaushik,

Kumar

et al. 2023

Int J of Food Sci Tech

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“…In recent years, several studies have reported on the potential of carbonaceous groups as a novel class of adsorption sites for uoride (Gourai, et al, 2023;Zhang and Jia, 2016b). The presence of hydrogen bonding and electrostatic attraction has been well-established, but Manna et al proposed that uoride can also form covalent bonds with carbon atoms during the adsorption process (Manna, et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Carbon-Enhanced Aluminum-Based Adsorbent for Highly Efficient Removal of Fluoride Contamination from Water

Tong,

Miao,

et al. 2023

Preprint

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Excessive fluoride presence in water poses significant environmental and public health risks, necessitating the development of effective remediation techniques. Conventional aluminum-based adsorbents face inherent limitations such as limited pH range and low adsorption capacity. To overcome these challenges, we present a facile solvent-thermal method for synthesizing a carbon-doped aluminum-based adsorbent (CDAA). Extensive characterization of CDAA reveals remarkable features including substantial carbon-containing groups, unsaturated aluminum sites, and a high point of zero charge (pHpzc). CDAA demonstrates superior efficiency and selectivity in removing fluoride contaminants, surpassing other adsorbents. It exhibits exceptional adaptability across a broad pH spectrum from 3 to 12, with a maximum adsorption capacity of 637.4 mg/g, more than 110 times higher than alumina. The applicability of the Langmuir isotherm and pseudo-second-order models effectively supports these findings. Notably, CDAA exhibits rapid kinetics, achieving near-equilibrium within just 5 minutes. Detailed analyses employing FTIR and XPS provide profound insights into the underlying mechanisms governing the adsorption process, which is facilitated by the active involvement of carbon-containing functional groups. The exceptional attributes of CDAA establish its immense potential as a transformative solution for the pressing challenge of fluoride removal from water sources.

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Bentonite clay-modified coconut biochar for effective removal of fluoride: kinetic, isotherm studies

Sudan,

Kaushal,

Khajuria

et al. 2024

Adsorption

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Thermal plasma processing of Moringa oleifera biochars: adsorbents for fluoride removal from water

Abstract: Moringa leaf biochar-based adsorption of fluoride in contaminated drinking water.

Cited by 12 publications

References 45 publications

Carbon-Enhanced Aluminum-Based Adsorbent for Highly Efficient Removal of Fluoride Contamination from Water

Bentonite clay-modified coconut biochar for effective removal of fluoride: kinetic, isotherm studies

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