Removal of paraquat in aqueous suspension of TiO2 in an immersed UV photoreactor

Autor:	Moon-Sun Kim, Chul Kyung Kim, Chan-Hwa Chung, Byung-Woo Kim, Gui Young Han, Sung Min Cho, Ki June Yoon, Joon-Chul Lee
Rok vydání:	2003
Předmět:	Chemistry General Chemical Engineering General Chemistry Photochemistry Aqueous suspension Hydrothermal circulation Catalysis Volumetric flow rate chemistry.chemical_compound Light intensity Paraquat Photocatalysis Photodegradation Nuclear chemistry
Zdroj:	Korean Journal of Chemical Engineering. 20:862-868
ISSN:	1975-7220 0256-1115
DOI:	10.1007/bf02697289
Popis:	Experiments were performed to investigate the effect of operating parameters on the photodegradation efficiency of paraquat in a TiO2-suspended photoreactor with immersed UV lamps. TiO2 particles were prepared by a hydrothermal method. The removal rate of paraquat in the reactor was 0.54 mg/l/h with only air-sparging. The removal rate in 24 h with both the UV radiation and air-sparging was 50% higher than that with only the UV radiation. Variations of the paraquat concentration at the UV intensities of 4 and 8 W/m2 decreased slowly with time, but that at 12 W/m2 decreased more rapidly. The removal efficiency at the air-sparging flow rate of 1 //min increased as a UV light intensity increased. pH value in the reactor at the UV intensity of 12 W/m2 decreased with time until 12 h and then increased with time over 12 h.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::15625abc6c8d0567425ecd200b4838e3 https://doi.org/10.1007/bf02697289 Zobrazit plný text záznamu Full text from SpringerLink