Competitive adsorption and photodegradation of salicylate and oxalate on goethite

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F11%3A43892495" target="_blank" >RIV/60461373:22310/11:43892495 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61388955:_____/11:00359745

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.cattod.2010.11.083" target="_blank" >http://dx.doi.org/10.1016/j.cattod.2010.11.083</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cattod.2010.11.083" target="_blank" >10.1016/j.cattod.2010.11.083</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Competitive adsorption and photodegradation of salicylate and oxalate on goethite

Popis výsledku v původním jazyce

This work deals with the competitive adsorption and photodegradation of salicylate and oxalate on alpha-FeOOH (goethite) which is a predominant crystalline modification of iron oxide present in sea sediment. pH is a crucial parameter in goethite photodissolution; therefore, by means of a pH stat titration, pH was kept constant during all experiments. For either acidic (pH 3) or neutral (pH 6) pH values oxalate is preferentially adsorbed on the goethite surface. Thus, in the presence of oxalate, adsorption of salicylate is suppressed and for oxalate concentration 2 mM is even negligible. Without oxalate the photodegradation of salicylate on goethite is negligible due to the short circuiting effect of photo-generated h(+) and e(-). When oxalate is present in the system photodissolution of goethite takes place, which results in the formation of OH radicals and photodegradation of salicylate. At pH 3 photodissolution of goethite is faster than at pH 6; oxalate disappears and salicylate pho

Název v anglickém jazyce

Competitive adsorption and photodegradation of salicylate and oxalate on goethite

Popis výsledku anglicky

This work deals with the competitive adsorption and photodegradation of salicylate and oxalate on alpha-FeOOH (goethite) which is a predominant crystalline modification of iron oxide present in sea sediment. pH is a crucial parameter in goethite photodissolution; therefore, by means of a pH stat titration, pH was kept constant during all experiments. For either acidic (pH 3) or neutral (pH 6) pH values oxalate is preferentially adsorbed on the goethite surface. Thus, in the presence of oxalate, adsorption of salicylate is suppressed and for oxalate concentration 2 mM is even negligible. Without oxalate the photodegradation of salicylate on goethite is negligible due to the short circuiting effect of photo-generated h(+) and e(-). When oxalate is present in the system photodissolution of goethite takes place, which results in the formation of OH radicals and photodegradation of salicylate. At pH 3 photodissolution of goethite is faster than at pH 6; oxalate disappears and salicylate pho

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CH - Jaderná a kvantová chemie, fotochemie

OECD FORD obor

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Projekt

<a href="/cs/project/1M0577" target="_blank" >1M0577: Výzkumné centrum pro nanopovrchové inženýrství</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2011

Kód důvěrnosti údajů

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

Název periodika

Catalysis Today

ISSN

0920-5861

e-ISSN

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Svazek periodika

161

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

7

Strana od-do

221-227

Kód UT WoS článku

000287730900037

EID výsledku v databázi Scopus

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