aqueous phase thiosulfate removal using photo catalysis

نویسندگان

m.s. vohra

s.m. selimuzzaman

m.s. al-suwaiyan

چکیده

removal of thiosulfate (s2o32-, 200 mg/l) from simulated wastewater samples was investigated under varying co-pollutants and ph conditions employing the titanium dioxide (tio2) mediated photocatalysis. for thiosulfate only studies higher substrate removal was noted at lower ph with a specific trend of ph 4 > ph 7 > ph 10. furthermore, near complete thiosulfate removal was also achieved at ph 4. a similar thiosulfate removal trend was also noted for the binary thiosulfate & p-cresol and thiosulfate & thiocyanate systems at ph 4, indicating high photocatalysis process efficiency. however, thiosulfate removal from the mixed systems at ph greater than 4 was slower as compared to the respective thiosulfate only systems. nevertheless for the binary thiosulfate & thiocyanate system, significant thiosulfate removal was noted even at ph 12 when the thiosulfate concentration was reduced to 40 mg/l.

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عنوان ژورنال:
international journal of environmental research

ناشر: university of tehran

ISSN 1735-6865

دوره 5

شماره 1 2010

کلمات کلیدی

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