Efficient degradation method of emerging organic pollutants in marine environment using UV/periodate process: Case of chlorazol black. (January 2018)

• Record Type: Journal Article
• Authors: Bendjama, Hafida; Merouani, Slimane; Hamdaoui, Oualid; Bouhelassa, Mohamed
• Is Part Of: Marine pollution bulletin. Volume 126(2018)
• Page Start: 557
• Page End: 564
• Publication Date: 2018-01
• Subjects: Seawater -- Emerging organic pollutants (EOPs) -- UV/IO4− process -- Chlorazol black (CB) -- Iodine radicals -- Surfactants; Marine pollution -- Periodicals; Marine Biology -- Periodicals; Water Pollution -- Periodicals; Mer -- Pollution -- Périodiques; Publications périodiques; Pollution des mers; Lutte antipollution; Electronic journals; 363.7394
• DOI: 10.1016/j.marpolbul.2017.09.059
• Languages: English
• ISSNs: 0025-326X

Abstract

Abstract: Sea has historically been subject to high anthropogenic pressures of direct and indirect loads of emerging organic pollutants (EOPs) from intensive industrial and agricultural activities. Photoactivated periodate (UV/IO4 − ) is an innovative oxidation technique that was never tested in seawater as pollutants matrix. In this work, we attempted to investigate the treatment of seawater contaminated with chlorazol black (CB) dye, as a model of EOPs, using photoactivated periodate process. It was found that periodate (0.5 mM) assisted-UV treatment of CB (20 mg L − 1 ) in seawater resulted in 13.16-fold increase in the initial degradation rate, compared to UV alone, and 82% of CB was removed after 40 min face to 38% under UV alone. The beneficial effect of UV/IO4 − treatment is strongly dependent on operational parameters. More interestingly, SDS surfactant, as an organic matter, did not affect the degradation process, making UV/IO4 − a promising technique for treating seawater contaminated with EOPs. Highlights: UV/IO4 − process was applied for degrading chlorazol black (CB) in seawater. Photoactivated periodate process is applicable in seawater only for pH solution < 7. Degradation rate increased with increasing periodate and CB concentrations and decreasing pH. Degradation rate of CB was not affected by liquid temperature rise in the interval 25–55 °C. SDS surfactant did not affect the degradation rate of CB, making UV/IO4 − process a promising method for treating contaminated seawater.