| Title: | UV-activated adsorbents as novel materials for enhanced removal of malodorous gases |
| Author(s): | Kim S; Gupta NK; Bae J; Kim KS; |
| Address: | "University of Science and Technology (UST), Daejeon, Republic of Korea; Department of Land, Water, and Environment Research, Korea Institute of Civil Engineering and Building Technology (KICT), Goyang, Republic of Korea. Department of Land, Water, and Environment Research, Korea Institute of Civil Engineering and Building Technology (KICT), Goyang, Republic of Korea. University of Science and Technology (UST), Daejeon, Republic of Korea; Department of Land, Water, and Environment Research, Korea Institute of Civil Engineering and Building Technology (KICT), Goyang, Republic of Korea. Electronic address: kskim@kict.re.kr" |
| DOI: | 10.1016/j.chemosphere.2020.128943 |
| ISSN/ISBN: | 1879-1298 (Electronic) 0045-6535 (Linking) |
| Abstract: | "The performance of UV-activated Fe(2)O(3)-containing ZSM-5 (UFZ5) and silica (UFS) as adsorbents for the removal of low concentration of volatile organic sulfur compounds (VOSCs) was investigated in ambient conditions. A approximately 99.9% and approximately 89.2% removal of 10 ppm DMDS was observed for UFZ5 and UFS, respectively, due to a higher proportion of iron in UFZ5. The N(2) adsorption isotherm confirmed an unpredictable increase in the surface area and pore volume of adsorbents after the fifth adsorption-oxidation cycle, which made adsorbents highly reusable for multiple cycles. The spectroscopic analysis predicted an increase in the hydroxyl density along with the resistance of catalytic sites against sulfur deactivation, which favored the adsorption-oxidation process. The adsorption capacity of UFZ5 remained in the range of 0.12-0.22, 0.26-0.48, 0.40-0.75 mg g(-1) for methyl mercaptan (MM), dimethyl sulfide (DMS), and dimethyl disulfide (DMDS), respectively which were significantly higher than those calculated for UFS. The analysis confirmed SO(2), CO, CH(3)OH, H(2)O, and elemental S as by-products. The UFZ5 was found competent and robust for the treatment of VOSCs-contaminated indoor air" |
| Keywords: | Adsorption *Air Pollution Gases Sulfur Sulfur Compounds/analysis *Volatile Organic Compounds/analysis Adsorption-oxidation Organic sulfur compounds Silica UV-Activation Zsm-5; |
| Notes: | "MedlineKim, Suho Gupta, Nishesh Kumar Bae, Jiyeol Kim, Kwang Soo eng England 2020/11/22 Chemosphere. 2021 Mar; 266:128943. doi: 10.1016/j.chemosphere.2020.128943. Epub 2020 Nov 11" |
