Author/Authors :
Vohra، M.S نويسنده Civil Engineering Department, King Fahd University of Petroleum and Minerals, Dhahran, Kingdom of Saudi Arabia 31261 , , Selimuzzaman، S.M نويسنده Civil Engineering Department, King Fahd University of Petroleum and Minerals, Dhahran, Kingdom of Saudi Arabia 31261 , , Al-Suwaiyan، M.S نويسنده Civil Engineering Department, King Fahd University of Petroleum and Minerals, Dhahran, Kingdom of Saudi Arabia 31261 ,
Abstract :
:Removal of thiosulfate (S2
O3
2-
, 200 mg/L) from simulated wastewater samples was investigated
under varying co-pollutants and pH conditions employing the titanium dioxide (TiO2
) mediated photocataly-
sis. 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.
