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Competitive adsorption and photodegradation of salicylate and oxalate on goethite
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SYSNO ASEP 0359745 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Competitive adsorption and photodegradation of salicylate and oxalate on goethite Tvůrce(i) Krýsa, J. (CZ)
Jirkovský, Jaromír (UFCH-W) RID
Bajt, O. (SI)
Mailhot, G. (FR)Zdroj.dok. Catalysis Today. - : Elsevier - ISSN 0920-5861
Roč. 161, č. 1 (2011), s. 221-227Poč.str. 7 s. Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova goethite ; oxalate ; salicylate Vědní obor RIV CG - Elektrochemie CEP 1M0577 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy CEZ AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000287730900037 DOI 10.1016/j.cattod.2010.11.083 Anotace 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. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2012
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