Microwave-assisted spent black tea leaves as cost-effective and powerful green adsorbent for the efficient removal of Eriochrome black T from aqueous solutions

Khan, Ayub; Wang, Xiangke; Gul, Kashif; Khuda, Fazli; Aly, Zaynab; Elseman, Ahmed Mourtada

doi:10.1016/j.ejbas.2018.04.002

Cited by 46 publications

(19 citation statements)

References 56 publications

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“…In addition, activated carbon prepared from spent black tea leaves via microwave-assisted method (MASTL) were investigated for Eriochrome Black T (EBT) sequestration from aqueous solution [117]. A pH pzc of 4.6 was obtained for MASTL.…”

Section: Carbonaceous Adsorbents (Such As Carbonized Materials Activmentioning

confidence: 99%

The utilization of leaf-based adsorbents for dyes removal: A review

Bulgariu

Escudero

Bello

et al. 2019

Journal of Molecular Liquids

396

128

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The presence of organic dyes in the aquatic environment is a serious global problem because of the serious negative consequences on the quality of ecosystems. Among various physico-chemical methods, the adsorption could be considered a promising alternative for removing dyes from aqueous media, due to its efficiency, high selectivity, low cost, ease of operation, simplicity, and availability in a wide range of experimental conditions. However, all these advantages are closely related to the nature of adsorbent material used in the adsorption processes of dyes. The adsorbent materials available in large quantities requiring a simple preparation will enhance the benefits of the adsorption processes, in agreement with the concepts of green chemistry. This review is focused on the use of leaf-based materials, in raw or modified forms, as adsorbents for the removal of dyes from aqueous effluents, with applications in the wastewater treatment. This review addresses characterization of leaf-based adsorbents, possible utilization of leaf-based adsorbents (raw and activated forms) for dye removal and possible applications in pilot and full scale systems. Also, thermodynamics, equilibrium and kinetic parameters of dye adsorption on leaf-based adsorbents are discussed. The practical utility of leaf-based adsorbents for dye removal, and their possible uses in the treatment of industrial wastewater are copiously highlighted.

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Section: Carbonaceous Adsorbents (Such As Carbonized Materials Activmentioning

confidence: 99%

The utilization of leaf-based adsorbents for dyes removal: A review

Bulgariu

Escudero

Bello

et al. 2019

Journal of Molecular Liquids

396

128

View full text Add to dashboard Cite

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“…4b,c and 5b,c that an increase time and power led to a general decrease in the extraction of α-solanine. This highest extraction of α-solanine was observed at 40% microwave power, Microwave power was reported by Kuhnert and Danks (2002) and Khan et al (2018) to cause superheated solvents. Additionally, an increase in microwave power resulted in the superheated extraction by water, resulting in quicker and easier penetration of solvent into the plant matrix.…”

Section: Box Plots Evaluating the Effect Of Time Mass Of Plant Powder...mentioning

confidence: 67%

Effect of Microwave-Assisted Aqueous Two-Phase Extraction of α-Solanine from S. retroflexum and Analysis on UHPLC-qTOF-MS

et al. 2022

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A new, fast and efficient method, hyphenated microwave-assisted aqueous two-phase extraction (MA-ATPE) was applied in the extraction of α-solanine from Solanum retroflexum. This environmentally friendly extraction method applied water and ethanol as extraction solvents. Central composite design (CCD) was performed which included numerical parameters such as time, mass of plant powder and microwave power. The categorical factors included the chaotrope — NaCl or the kosmotrope — Na2CO3. Fitting the central composite design response surface model to the data generated a quadratic model with a good fit (R2 = 0.920). The statistically significant (p < 0.05) parameters such as time and mass of plant powder were influential in the extraction of α-solanine. Quantification of α-solanine was achieved using a robust and sensitive feature of the ultra-high performance quadrupole time of flight mass spectrometer (UHPLC-qTOF-MS), multiple reaction monitoring (MRM). The optimized condition for the extraction of α-solanine in the presence of NaCl and Na2CO3 was a period of 1 min at a mass of 1.2 g using a microwave power of 40%. Maximal extraction of α-solanine was 93.50 mg kg−1 and 72.16 mg kg−1 for Na2CO3 and NaCl, respectively. The synergistic effect of salting-out and microwave extraction was influential in extraction of α-solanine. Furthermore, the higher negative charge density of the kosmotrope (Na2CO3) was responsible for its greater extraction of α-solanine than chaotrope (NaCl). The shorter optimal extraction times of MA-ATPE make it a potential technique that could meet market demand as it is a quick, green and efficient method for removal of toxic metabolites in nutraceuticals.

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“…Neem leaf powder was also used for the adsorption of brilliant green dye 124 , which showed 0.554 mmol/g adsorption capacity in 240 min. The microwave-assisted spent tea leaves exhibited a maximum of 242.72 mg/g adsorption capacity for Eriochrome black-T adsorption in a contact time of 24 h. 113 22…”

Section: Agricultural Waste Materialsmentioning

confidence: 96%

“…Different waste materials, such as lemongrass leaf, rice husk, orange peel, spent tea leaves, etc., are reportedly used as an important source for deriving activated carbon for their application as effective adsorbents in the dye remediation. [110][111][112][113][114] For example, Ahmad et al utilized lemongrass leaf-based activated carbon to remediate methyl red from contaminated water. Their findings showed an optimum dye adsorption capacity of 76.923 mg/g at pH 2 in 5 h. The increased adsorption rate of methyl red dye was mainly assigned to the increase of temperature, dye concentration, and contact time.…”

Section: Activated Carbon From Waste Materialsmentioning

confidence: 99%

Recent advances on the removal of dyes from wastewater using various adsorbents: a critical review

et al. 2021

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Microwave-assisted spent black tea leaves as cost-effective and powerful green adsorbent for the efficient removal of Eriochrome black T from aqueous solutions

Abstract: View related articles View Crossmark data Citing articles: 3 View citing articles Full Length Article Microwave-assisted spent black tea leaves as cost-effective and powerful green adsorbent for the efficient removal of Eriochrome black T from aqueous solutions

Cited by 46 publications

References 56 publications

The utilization of leaf-based adsorbents for dyes removal: A review

The utilization of leaf-based adsorbents for dyes removal: A review

Effect of Microwave-Assisted Aqueous Two-Phase Extraction of α-Solanine from S. retroflexum and Analysis on UHPLC-qTOF-MS

Recent advances on the removal of dyes from wastewater using various adsorbents: a critical review

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