Idioma:

1,3,5-Tris-(2,3-dibromopropyl)-1,3,5-triazine-2,4,6-trione: kinetic studies and phototransformation products

Lörchner, Dominique ; Kroh, Lothar W. ; Köppen, Robert

Environmental science and pollution research international, 2019-06, Vol.26 (16), p.15838-15846 [Periódico revisado por pares]

Berlin/Heidelberg: Springer Berlin Heidelberg

Texto completo disponível

Citações Citado por

Enviar para

Título:
1,3,5-Tris-(2,3-dibromopropyl)-1,3,5-triazine-2,4,6-trione: kinetic studies and phototransformation products
Autor: Lörchner, Dominique ; Kroh, Lothar W. ; Köppen, Robert
Assuntos: Aquatic Pollution ; Atmospheric Protection/Air Quality Control/Air Pollution ; Automotive electronics ; Automotive parts ; Bromination ; Computer simulation ; Degradation ; Earth and Environmental Science ; Ecotoxicology ; Electronic equipment ; Environment ; Environmental Chemistry ; Environmental Health ; Environmental science ; Experiments ; Flame retardants ; Free radicals ; High-performance liquid chromatography ; Hydrogen peroxide ; Hydroxyl radicals ; Hydroxylation ; Irradiation ; Liquid chromatography ; Mass spectrometry ; Mass spectroscopy ; Musical instruments ; Organic chemistry ; Photochemicals ; Photolysis ; Propanol ; Research Article ; Scavenging ; Sodium ; Sodium azide ; Sodium azides ; Sunlight ; Triazine ; Ultraviolet radiation ; Waste Water Technology ; Water Management ; Water Pollution Control
É parte de: Environmental science and pollution research international, 2019-06, Vol.26 (16), p.15838-15846
Descrição: 1,3,5-Tris-(2,3-dibromopropyl)-1,3,5-triazine-2,4,6-trione (TDBP-TAZTO) is an emerging brominated flame retardant which is widely used in several plastic materials (electric and electronic equipment, musical instruments, automotive components). However, until today, no photochemical studies as well as the identification of possible phototransformation products (PTPs) were described in literature. Therefore, in this study, UV-(C) and simulated sunlight irradiation experiments were performed to investigate the photolytic degradation of TDBP-TAZTO and to identify relevant PTPs for the first time. The UV-(C) irradiation experiments show that the photolysis reaction follows a first-order kinetic model. Based on this, the photolysis rate constant k as well as the half-life time t 1/2 were calculated to be k = (41 ± 5 × 10 −3 ) min −1 and t 1/2 = (17 ± 2) min. In comparison, a minor degradation of TDBP-TAZTO and no formed phototransformation products were obtained under simulated sunlight. In order to clarify the photochemical behavior, different chemicals were added to investigate the influence on indirect photolysis: (i) H 2 O 2 for generation of hydroxyl radicals and (ii) two quenchers (2-propanol, sodium azide) for scavenging oxygen species which were formed during the irradiation experiments. Herein, nine previously unknown PTPs of TDBP-TAZTO were detected under UV-(C) irradiation and identified by HPLC-(HR)MS. As a result, debromination, hydroxylation, and dehydrobromination reactions could be presumed as the main degradation pathways by high-resolution mass spectrometry. The direct as well as the OH radical-induced indirect photolysis were observed. Graphical abstract .
Editor: Berlin/Heidelberg: Springer Berlin Heidelberg
Idioma: Inglês

Links

View this record in MEDLINE/PubMed

Voltar para lista de resultados

Anterior Resultado 2 Avançar Ir para próxima página

Realização: Logos de Redes Sociais:

1,3,5-Tris-(2,3-dibromopropyl)-1,3,5-triazine-2,4,6-trione: kinetic studies and phototransformation products

Lörchner, Dominique ; Kroh, Lothar W. ; Köppen, Robert

Berlin/Heidelberg: Springer Berlin Heidelberg

Buscando em bases de dados remotas. Favor aguardar.