Photolytic debromination
Web“The current photolytic degradation experiments were performed on DBDPE in solvents and on silica gel. Large differences in the photolytic degradation behaviors of DBDPE may exist between lab matrixes and the natural environmental media such as atmospheric particles, soil, and water as suggested previously for deca-BDEs (Raff and Hites, 2007). WebIV. Photolytic Debromination of BDE 209 BDE 209 absorbs sunlight in the UV region of the electromagnetic spectrum that reaches the surface of the earth. Due to this light absorption, BDE 209 is susceptible to photodegradation, which can occur significantly through debromination. A majority of the UV spectrum is blocked by glass windows and
Photolytic debromination
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WebAug 25, 2014 · During the photocatalytic debromination, moreover, the formed BDE intermediates exhibited a significant difference between the Pd-TiO2 and pristine TiO2 … WebApr 1, 2024 · Photodegradation is an important process for the abiotic transformation of PBDEs in the environment [15]. In electronic waste (e-waste) recycling area, such as Guiyu, China, the e-waste and some of polyurethane foam might be directly exposed to sunlight.
WebThe photolytic transformation of decabromodiphenyl ethane—a current-use brominated flame retardant and major substitute of the structurally related decabromodiphenyl … WebFeb 1, 2013 · The congener profiles of PBDEs in the current sediments (with more abundant lower-brominated congeners) differed substantially from those in 2002 and from the technical products, suggesting that biological or photolytic debromination of PBDEs may have occurred in the environment. Copyright © 2012 Elsevier B.V. All rights reserved. …
WebFeb 1, 2004 · Besides, the photolytic debromination of highly brominated PBDEs (notably BDE-209) has been considered as additional source of lower brominated congeners … WebPhotodegradation has been demonstrated as one of the important environmental factors affecting the fate of contaminants such as brominated flame retardants (BFRs). However, a number of emerging...
WebPhotolytic Debromination Pathway of Polybrominated Diphenyl Ethers in Hexane by Sunlight. Environmental Pollution. 2013 Other authors. …
WebDec 25, 2012 · The objective of this work is to identify the photolytic debromination pathways of polybrominated diphenyl ethers (PBDEs). Thirteen PBDEs (BDEs 209, 208, 207, 206, 196, 183, 154, 153, 100, 99,... how many school shootings in 1900http://www.env-health.org/IMG/pdf/Debromination_paper_04052006_2_.pdf how many school shootings in 1950how did beowulf\u0027s warriors break comitatusWebJan 1, 2014 · The photodegradation of decabromodiphenylether (BDE209) in Tetrahydrofuran was investigated under UV light, employing a xenon source with 150 W. The degradation reactions obey a first-order rate law. The photolytic chemical reduction of BDE209 in THF under UV irradiation can rapidly degrade BDE209 to form lower bromine … how did beowulf\\u0027s warriors break comitatushttp://www.env-health.org/IMG/pdf/Debromination_paper_04052006_2_.pdf how many school shootings have there beenWebThe photolysis of decabromodiphenyl ether, dissolved in toluene, was studied using a filtered Xe lamp as solar simulator. A loss of decabromodiphenyl ether, leading to unknown products, and sequential debromination via the nona-, octa-, heptabromodiphenyl ethers was observed. The photolytic rate constant of decabromodiphenyl ether, kphot = 3·10-4s-1, … how many school shootings in 2000WebPhotolytic debromination of PBDE-28, PBDE-47, PBDE-99, PBDE-100, PBDE-153, and PBDE-183 has been observed following pseudo-first-order kinetics (Fang et al., 2008). Higher brominated PBDE congeners degrade at a faster rate than the lower brominated ones, … how many school shootings in 2016