Efficient degradation method of emerging organic pollutants in marine environment using UV/periodate process: Case of chlorazol black

Acetone photoactivated process: application to the degradation of refractory organic pollutants in very saline waters

“…Coastal area usually acts as receptors for several types of discharges and dumping waste containing high levels of emerging organic pollutants (EOPs) generated from intensive industrial and agricultural activities (Quante et al ., 2011; Merhaby et al ., 2015). Polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs) and synthetic dyes are among the various EOPs detected in marine environment (Bendjama et al ., 2018). Azo dyes, which mostly consist of aromatic moieties linked together by N=N bonding, are among the most notorious and widespread environmental pollutants associated with textile, cosmetic, food and leather industries (Pereira and Alves, 2012; Hamdaoui and Merouani, 2017).…”

“…However, the application of these processes in seawater is limited by the high reactivity of hydroxyl and sulfate radicals towards chloride ions (Neta et al ., 1988). More recently, iodine radical, generated upon UV photolysis of periodate, has also been involved efficiently in the degradation of organic pollutants (Bendjama et al ., 2018). The advantage of iodine radical is that is selective and unreactive with chloride and sulfate ions (Bendjama et al ., 2018).…”

“…More recently, iodine radical, generated upon UV photolysis of periodate, has also been involved efficiently in the degradation of organic pollutants (Bendjama et al ., 2018). The advantage of iodine radical is that is selective and unreactive with chloride and sulfate ions (Bendjama et al ., 2018). In this approach, acetone photoactivation may be integrated as an emerging method for seawater treatment.…”

“…The degradation of the dye was assessed at various operating parameters including initial acetone and CB concentrations, liquid temperature and solution pH. CB is a persistent and non‐biodegradable chemical that usually used in various requests such as dyeing of fabric, leather, cotton, cellulose materials and plastic (Bendjama et al ., 2018). The carcinogenic and mutagenic effects of this compound towards humans and animals have been well established (Lewis, 2008).…”

Soybean Peroxidase‐Catalyzed Treatment of Azo Dyes with or without Fe° Pretreatment

“…Direct Black (DB38) is a benzidine-based azo dye classified as probable human carcinogen by the U. S. Environmental Protection Agency, which can be used as a model for these toxic types of azo dyes. Benzidine-based azo dyes are extensively used in textile, printing, and leather industry (Bandala et al, 2008;Bendjama et al, 2017;IARC 2018). Conventional methods such as filtration, adsorption, membrane processes, and ion exchange have been studied to remove azo dyes (Konicki et al, 2017;Konsowa et al, 2011;Oduor et al, 2008;Shirzad-Siboni et al, 2014).…”