Perovskite-type titanate zirconate as photocatalyst for textile wastewater treatment

• Published in: Environmental science and pollution research international Vol. 24; no. 14; pp. 12529 - 12537
• Main Authors: Ferrari-Lima, A. M., Ueda, A. C., Bergamo, E. A., Marques, R. G., Ferri, E. A. V., Pinto, C. S., Pereira, C. A. A., Yassue-Cordeiro, P. H., Souza, R. P.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.05.2017; Springer Nature B.V
• Subjects: Aquatic Pollution; Atmospheric Protection/Air Quality Control/Air Pollution; Calcium; Calcium Compounds; Calcium titanate; Calcium zirconate; Chemical oxygen demand; Chemical synthesis; Coagulants; Coagulation; Combined treatment; Earth and Environmental Science; Ecotoxicology; Environment; Environmental Chemistry; Environmental Health; Environmental Photocatalysis and Photochemistry for a Sustainable World: A Big Challenge; Environmental science; Flocculation; Methylene blue; Oxides; Photoacoustic spectroscopy; Photocatalysis; Photocatalysts; Spectroscopy; Structural analysis; Textile Industry; Textile industry wastewaters; Textiles; Titanium; Ultraviolet radiation; Ultraviolet Rays; Waste Disposal, Fluid; Waste Water - chemistry; Waste Water Technology; Wastewater treatment; Water Management; Water Pollution Control; X-ray diffraction; Textile wastewater; Titanate Zirconate; Perovskites; Photocatalyst; Photocatalysis
• ISSN: 0944-1344; 1614-7499
• DOI: 10.1007/s11356-016-7590-4

Calcium titanate zirconate, Ca(Ti (1-x) Zr x )O 3 (CZT), powders have been synthesised by the polymeric precursor method. The structural analysis of the CZT powders was monitored by X-ray diffraction (XRD), photoacoustic spectroscopy (PAS) and textural analysis. The photocatalytic properties were evaluated by methylene blue (MB) decomposition and real textile wastewater (RTW) combined treatment (coagulation/flocculation/photocatalysis). Chemical oxygen demand (COD) of RTW was successfully reduced from 6195 mg L −1 (untreated) to 662 mg L −1 after coagulation/flocculation with a tannin-based coagulant (Tanfloc ® ) and finally to 471 mg L −1 after combined treatment (coagulation/flocculation/photocatalysis) applying ultraviolet radiation and CaTiO 3 as photocatalyst.