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Bioremediation and toxicity mechanism of some herbicide dinitrophenyl derivatives

Domenii publicaţii > Chimie + Tipuri publicaţii > Articol în volumul unei conferinţe

Autori: Drochioiu, G., Murariu, M., Jurcoane, S

Editorial: Z. Agioutantis and K. Komnitsas, Proceedings of 3rd AMIREG International Conference, Assessing the Footprint of Resources Utilization and Hazardous Waste Management, p.90-95, 2009.


Biodegradation and toxicity mechanisms of some dinitrophenols (DNP) and dinitrophenyl ethers (DNE), such as 2,4-, 2,6-, 3,5-dinitro-phenol, dinitro-o-cresol (DNOC), dinitroanisole (DNA), dinitro-phenetole (DNF), 2,4-dinitro-1-(octadecyloxy)-benzene (DNO), Karathane (Krt, 2,6-dinitro-4 or 6-octylphenyl crotonate), and 3-(2,4-dinitro-phenoxy)propan-1,2-diol (DNG) have been studied on yeast and wheat. Dinitro-phenols and dinitrophenyl ethers inhibited wheat germination, whereas 2,4-dinitrobenzoic acid proved to have a stimulatory action. Un-coupling dinitrophenols as well as dinitrophenyl ethers quench tryptophan fluorescence. The un-coupling activity of these compounds was corre-lated with an intense absorption in near infrared region over 6000 cm-1, at quantum energies which are similar to that needed for releasing the ATP molecule from ATPase. Fluorescence quenching, FT-IR spectra, circular dichroism data, and solubility characteristics of dinitro-phenyl compounds shed a new light on their mechanism of toxicity and that of biological activity. Chemical degradation and that by micro-organisms are discussed in order to increase the theoretical, medical, agricultural, forensic, and environmental interest in these compounds.

Cuvinte cheie: dinitrophenyl ether, toxicity, bioremediation