Azo dye removal by acid pretreated biomass and its regeneration by visible light photocatalysis with incorporated CuO

Benabbas, Khaled; Zabat, Nacéra; Hocini, Imene

doi:10.1080/09593330.2020.1786169

Cited by 7 publications

(1 citation statement)

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“…However, for VB-20, the peak obtained at 580 nm start to disappear on the third day, suggesting the cleavage of anthraquinone cycle by the AS microbial community (Parmar et al 2017). In addition, a new peak appeared with higher absorbance intensity at a wavelength of 320 and 240 nm during the second day, indicating that benzene and naphthalene derivative concentration increased due to the biogenerated metabolites (Benabbas et al 2020;Chowdhury, Bhattacharyya 2015). As long as the treatment continues, the absorbance for those peaks diminishes progressively suggesting the transformation of aromatic compounds to small organic molecules.…”

Section: Biodegradation Mechanismmentioning

confidence: 98%

Activated Sludge-Assisted Phytoremediation For Dye Removal

Hocini

Benabbas

Khellaf

et al. 2021

Preprint

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We report the biodegradation of dye pollutants by a green process that combines the microbial activity of activated sludge with phytoremediation ability of the aquatic plant L. gibba. The obtained results showed that the combination of the two processes when the pollutant was present at concentration of 50 mg/L, lead to a dye removal of 95 and 70% for VB-20 and DR-89, respectively. The biodegradability index based on COD and BOD5 measurement was equal to 3.1 for DR-89 and 2.0 for VB-20, confirming that DR-89 was removed by biosorption phenomena and only VB-20 was transformed into biodegradable compounds. UV-visible, FT-IR and LC/MS analysis were used as a tool for the monitoring of the biodegradation metabolite and the results showed that VB-20 biodegradation occurred by the cleavage of anthraquinone cycle and transformation of aromatic compounds to light hydrocarbon chain; this was further confirmed by the calculation of Fukui index using DFT method. This study highlighted the synergy between the phytoremediation and biodegradation process for organic dye removal.

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Section: Biodegradation Mechanismmentioning

confidence: 98%