| Title: | Effect of photocatalytic pretreatment on the biodegradation of n-hexane vapours in a biofilter |
| Author(s): | Hajizadeh Y; Jafari N; Mokhtari M; Mohammadi A; Momtaz SM; Fanaei F; Abdolahnejad A; |
| Address: | "Department of Environmental Health Engineering, Faculty of Health, Environmental Research Center, Research Institute for Primordial Prevention of Non-Communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran. Environmental Science and Technology Research Center, Department of Environmental Health Engineering, Faculty of Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran. Department of Public Health, Maragheh University of Medical Sciences, Maragheh, Iran. Department of Environmental Health Engineering, Faculty of Health, Bam University of Medical Sciences, Bam, Iran. Department of Environmental Health Engineering, Faculty of Health, Iran University of Medical Sciences, Tehran, Iran" |
| DOI: | 10.1016/j.mex.2020.100991 |
| ISSN/ISBN: | 2215-0161 (Print) 2215-0161 (Electronic) 2215-0161 (Linking) |
| Abstract: | "Hydrophobic volatile organic compounds (VOCs) such as n-hexane are not completely biodegradable by a single biofilter. So, in the present study, a photoreactor system packed with scoria granules coated with TiO(2), as a pretreatment unit, was used for increasing the removal efficiency of n-hexane by a biofilter during an operation period of 191 days. The inlet and outlet concentration of n-hexane was analyzed with a gas chromatography coupled with a flame ionization detector (GC/FID). The results indicated that the removal efficiency of the single biofilter with input concentrations of 0.18 - 1 g/m(3) at empty bed residence times (EBRTs) of 30, 60, and 120 s was 10.06%, 21.45%, and 46.8%, respectively. When the photoreactor was used as a pretreatment system, the removal efficiency of the combined system in corresponding EBRTs was improved to 39.79%, 63.08%, and 92.60%, respectively. The results proved that the combined system provided higher removal efficiencies than the single biofilter. Thus, the application of the photoreactor as a pretreatment step was much effective in increasing the removal efficiency of n-hexane from the polluted air by the biofilter" |
| Keywords: | Biofilter Hybrid system Photoreactor n-hexane vapor; |
| Notes: | "PubMed-not-MEDLINEHajizadeh, Yaghoub Jafari, Negar Mokhtari, Mehdi Mohammadi, Amir Momtaz, Seyed Mojtaba Fanaei, Farzad Abdolahnejad, Ali eng Netherlands 2020/07/28 MethodsX. 2020 Jul 10; 7:100991. doi: 10.1016/j.mex.2020.100991. eCollection 2020" |
