Seasonal variation in the properties of titania photocatalysts produced from Ti-salt flocculated bioresource sludge

• Published in: Bioresource technology 2011-05, Vol.102 (9), p.5545-5549
• Main Authors: Okour, Y., Shon, H.K., Liu, H., Kim, J.B., Kim, J.H.
• Format: Article
• Language: English
• Subjects: Alkalies - chemistry; Anatase; Applied sciences; Biological and medical sciences; Catalysis - radiation effects; Characterisations; Exact sciences and technology; Flocculating; Flocculation; Flocculation - radiation effects; Fundamental and applied biological sciences. Psychology; Hardness - radiation effects; Humic Substances - analysis; Metals, Heavy - isolation & purification; Microscopy, Electron, Scanning; Microscopy, Electron, Transmission; Nephelometry and Turbidimetry; Phosphorus - isolation & purification; Photocatalysis; Photocatalysts; Photoelectron Spectroscopy; Pollution; Rhodamines - chemistry; Seasonal variation; Seasonal variations; Seasons; Sewage - chemistry; Sludge; Spectrometry, X-Ray Emission; Surface Properties - radiation effects; Ti-salts; Titania; Titanium; Titanium - chemistry; Titanium dioxide; Treated sewage; Ultraviolet Rays; Waste Disposal, Fluid; Wastes; X-Ray Diffraction
• ISSN: 0960-8524; 1873-2976
• DOI: 10.1016/j.biortech.2010.11.060

Ti-salt flocculation of biologically treated sewage effluent (BTSE) was carried out on monthly basis during one year to trace the seasonal variation in the properties of BTSE, Ti-salt flocculated BTSE and titania photocatalysts. Titania photocatalysts were produced from incineration of Ti-salt flocculated sludge at 600 °C. The physio-chemical properties of BTSE, Ti-salt flocculated BTSE and titania photocatalysts were investigated. The photocatalytic activity of titania was examined using different substrates of rhodamine B and humic acid under UV light irradiation. Results indicated that the flocculation performance of Ti-salt was not affected by the seasonal variation of BTSE. BTSE characteristics resulted in marginal effect in titania characterisation and photocatalytic activity. Titania photocatalysts produced from Ti-salt flocculated sludge in different seasons showed constant anatase phase, high BET surface area and high photocatalytic activity.