TiO 2 as an effective nanocatalyst for photocatalytic degradation of humic acid in water environment

Research Article| December 28 2016 TiO2 as an effective nanocatalyst for photocatalytic degradation of humic acid in water environment Sandhya Babel; Sandhya Babel Search for other works by this author on: This Site PubMed Google Scholar Putri A. Sekartaji; Putri A. Sekartaji Search for other works by this author on: This Site PubMed Google Scholar Hanggara Sudrajat Hanggara Sudrajat Search for other works by this author on: This Site PubMed Google Scholar Journal of Water Supply: Research and Technology-Aqua (2017) 66 (1): 25–35. https://doi.org/10.2166/aqua.2016.102 Article history Received: September 12 2016 Accepted: November 04 2016 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Cite Icon Cite Permissions Search Site Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAll JournalsThis Journal Search Advanced Search Citation Sandhya Babel, Putri A. Sekartaji, Hanggara Sudrajat; TiO2 as an effective nanocatalyst for photocatalytic degradation of humic acid in water environment. Journal of Water Supply: Research and Technology-Aqua 13 February 2017; 66 (1): 25–35. doi: https://doi.org/10.2166/aqua.2016.102 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Photocatalysis with TiO2 is used to remove humic acid (HA) in a water environment under UVA and UVC light. The effects of operating parameters, including light intensity, HA concentration, catalyst dose, and contact time are investigated at neutral pH conditions. Results show that HA degradation increases with increasing contact time and light intensity and decreases with increasing HA concentration. Increasing catalyst dose increases the HA degradation up to an optimum value. At pH 7 with an initial HA concentration of 14 mg/L, UVA light of 0.236 mW/cm2 and catalyst dose of 0.3 g/L, 100% efficiency of the HA degradation can be achieved in 3 h. Under identical experimental conditions with UVC light of 0.284 mW/cm2, the efficiency of HA degradation also reaches 100%. Based on total organic carbon (TOC) analysis, the mineralization of HA is found to be lower than the degradation of HA. A negligible amount of TOC on the catalyst surface confirms that HA removal is due to photocatalysis. Moreover, a higher degree of mineralization of HA is found under UVA light although degradation is better under UVC light. This indicates that TiO2 under UVA light has relatively low selectivity to degrade different compounds, including various intermediates from HA degradation. humic acid, photocatalysis, reusability, TiO2, TOC, UV light © IWA Publishing 2017 Supplementary data Supplementary material- docx file You do not currently have access to this content.