- Ionic liquids (ILs) are considered as an alternative to traditional industrial organic solvents. To date, there are no papers about their detenction in effluents and in surface water, and they have emerged as contaminants within the frame of the Horizon Program due to their high solubility in water and poor biodegrability. The present work investigated the photocatalytic degradation of four imidazole-based compounds (imidazole, 1-methylimidazole, 1-ethyl-3-methyl-imidazolium chloride and 1- butyl-3-methyl-imidazolium chloride) by means of UV254/H2O2 ad advanced oxidation process in a complex aqueous matrix from the outlet of a wastewater treatment plant. The degradation was compared to the previous investigated photodegradation in bidistilled water and a mathematical model was proposed considering the overall role of the different scavengers in the competition reactions with photogenerated •OH radicals. In addition, a chronic toxicity assay using the freshwater crustacean Daphnia magna was employed for evaluating the ecotoxicity of photocatalytically treated solutions. The results highlighted that the effects of untreated and treated solutions on D. magna survival decreased with increasing lipophilicity and that it was necessary a fourth generation of ILs by-products to reduce the long-term effects of treated solutions. Delayed reproductive maturity and reduced fecundity were found regardless of treatment.
CHRONIC TOXICITY EFFECTS ON DAPHNIA MAGNA OF TREATED AQUEOUS SOLUTIONS OF IMIDAZOLE BASED COMPOUNDS BY UV/H2O2 / Siciliano, A; Russo, D; Spasiano, D; Guida, M. - (2016), pp. 64-64. (Intervento presentato al convegno 7th Biannual Ecotoxicology Meeting tenutosi a Livorno nel 22-24 November 2016).
CHRONIC TOXICITY EFFECTS ON DAPHNIA MAGNA OF TREATED AQUEOUS SOLUTIONS OF IMIDAZOLE BASED COMPOUNDS BY UV/H2O2.
A Siciliano;D Russo;D Spasiano;M Guida
2016
Abstract
- Ionic liquids (ILs) are considered as an alternative to traditional industrial organic solvents. To date, there are no papers about their detenction in effluents and in surface water, and they have emerged as contaminants within the frame of the Horizon Program due to their high solubility in water and poor biodegrability. The present work investigated the photocatalytic degradation of four imidazole-based compounds (imidazole, 1-methylimidazole, 1-ethyl-3-methyl-imidazolium chloride and 1- butyl-3-methyl-imidazolium chloride) by means of UV254/H2O2 ad advanced oxidation process in a complex aqueous matrix from the outlet of a wastewater treatment plant. The degradation was compared to the previous investigated photodegradation in bidistilled water and a mathematical model was proposed considering the overall role of the different scavengers in the competition reactions with photogenerated •OH radicals. In addition, a chronic toxicity assay using the freshwater crustacean Daphnia magna was employed for evaluating the ecotoxicity of photocatalytically treated solutions. The results highlighted that the effects of untreated and treated solutions on D. magna survival decreased with increasing lipophilicity and that it was necessary a fourth generation of ILs by-products to reduce the long-term effects of treated solutions. Delayed reproductive maturity and reduced fecundity were found regardless of treatment.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
