The study of degradation of azo dyes using photochemical reaction and titanium dioxide

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F16%3A39901416" target="_blank" >RIV/00216275:25310/16:39901416 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.5593/sgem2016B52" target="_blank" >http://dx.doi.org/10.5593/sgem2016B52</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5593/sgem2016B52" target="_blank" >10.5593/sgem2016B52</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The study of degradation of azo dyes using photochemical reaction and titanium dioxide

Popis výsledku v původním jazyce

Commercial samples of azo dyes: Saturn Yellow LFF 200, Saturn Red F3B 200 and Saturn Blue LBRR 200 (C.I. Direct Yellow 28, Direct Red 80 and Direct Blue 71) were purified and characterized by elemental analysis and mass spectroscopy. Dissolved dyestuffs have been photolysed in alkaline aqueous suspension (pH = 10) using polychromatic radiation of high pressure mercury lamp and titanium dioxide as a catalyst. The incident radiation (P = 1.21 x 10-4 Es.s-1.L-1) was measured by ferrioxalate actinometry in the range 200-600 nm. Active radiation for excitation of TiO2 (200-400 nm) was P0 = 4.2 x 10-5 Es.s-1.L-1. It was found that Saturn Yellow and Red fulfill the model of heterogeneous photocatalysis, while Saturn Blue decomposes even without catalyst. Kinetic model of heterogeneous photocatalysis was tested. The apparent efficiency of photodegradation (0.2-0.3%) as ratio of excitation rate and incident light was computed.

Název v anglickém jazyce

The study of degradation of azo dyes using photochemical reaction and titanium dioxide

Popis výsledku anglicky

Commercial samples of azo dyes: Saturn Yellow LFF 200, Saturn Red F3B 200 and Saturn Blue LBRR 200 (C.I. Direct Yellow 28, Direct Red 80 and Direct Blue 71) were purified and characterized by elemental analysis and mass spectroscopy. Dissolved dyestuffs have been photolysed in alkaline aqueous suspension (pH = 10) using polychromatic radiation of high pressure mercury lamp and titanium dioxide as a catalyst. The incident radiation (P = 1.21 x 10-4 Es.s-1.L-1) was measured by ferrioxalate actinometry in the range 200-600 nm. Active radiation for excitation of TiO2 (200-400 nm) was P0 = 4.2 x 10-5 Es.s-1.L-1. It was found that Saturn Yellow and Red fulfill the model of heterogeneous photocatalysis, while Saturn Blue decomposes even without catalyst. Kinetic model of heterogeneous photocatalysis was tested. The apparent efficiency of photodegradation (0.2-0.3%) as ratio of excitation rate and incident light was computed.

Druh

D - Stať ve sborníku

CEP obor

DJ - Znečištění a kontrola vody

OECD FORD obor

—

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Ecology, Economics, Education and Legislation Conference Proceedings SGEM 2016. VOL II

ISBN

978-619-7105-66-7

ISSN

1314-2704

e-ISSN

—

Počet stran výsledku

8

Strana od-do

863-870

Název nakladatele

SGEM

Místo vydání

Sofia

Místo konání akce

Albena

Datum konání akce

30. 6. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000391519600112