« Previous Abstract"beta-caryophyllene emitted from a transgenic Arabidopsis or chemical dispenser repels Diaphorina citri, vector of Candidatus Liberibacters"    Next Abstract"Intestinal Obstruction Secondary to Multiple Gastrointestinal phytobezoars, A Rare presentation" »

Environ Technol

Title:		Decomposition byproducts induced by gamma radiation and their toxicity: the case of 2-nitrophenol
Author(s):		Alsager OA; Basfar AA; Muneer M;
Address:		"a National Center for Irradiation Technology, Nuclear Science Research Institute , King Abdulaziz City for Science and Technology , Riyadh , Saudi Arabia"
Journal Title:		Environ Technol
Year:		2018
Volume:		20170429
Issue:		8
Page Number:		967 - 976
DOI:		10.1080/09593330.2017.1317840
ISSN/ISBN:		1479-487X (Electronic) 0959-3330 (Linking)
Abstract:		"The induced degradation and detoxification of 2-nitrophenol (2-NP) in aqueous media by gamma irradiation were carefully evaluated in this study. Gamma radiation at absorbed doses as low as 20 kGy was able to degrade 2-NP to reach a removal of at least 85% across the investigated range of concentration (50-150 ppm). 2-NP breaks down to aromatic-based compounds with increasing number of byproducts upon increasing the radiation treatment from the absorbed dose of 50% decomposition (D(50)) to the absorbed dose of 90% decomposition (D(90)), after which no byproducts could be detected, indicating the formation of undetectable aliphatic hydrocarbons, insoluble, or volatile byproducts. Toxicology studies showed that the degradation of 2-NP under absorbed doses up to D(90) resulted in a more toxic byproduct than the parent compound, and a remarkable reduction in the toxicity was observed with the irradiated samples with absorbed doses above D(90). Varying the pH of the media to acidic or basic conditions did not significantly alter the degradation behavior of 2-NP. However, a notable improvement of the detoxification was associated with the samples of acidic pH. Adding 0.5% of H(2)O(2) to 2-NP solutions had a positive effect by reducing D(90) by a factor of nine and diminishing the toxicity by twofolds"
Keywords:		Gamma Rays Hydrogen Peroxide Nitrophenols/*chemistry/toxicity Organic Chemicals 2-nitrophenol Gamma radiation byproducts and toxicity detoxification in-solution degradation;
Notes:		"MedlineAlsager, Omar A Basfar, Ahmed A Muneer, Majid eng England 2017/04/11 Environ Technol. 2018 Apr; 39(8):967-976. doi: 10.1080/09593330.2017.1317840. Epub 2017 Apr 29"