| Title: | Inhibition Effect of Negative Air Ions on Adsorption between Volatile Organic Compounds and Environmental Particulate Matter |
| Author(s): | Zhang C; Wu Z; Li Z; Li H; Lin JM; |
| Address: | "School of Chemistry, Beijing University of Chemical Technology, Beijing 100029, China. Department of Chemistry, Beijing Key Laboratory of Microanalytical Methods and Instrumentation, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing 100084, China" |
| DOI: | 10.1021/acs.langmuir.0c00109 |
| ISSN/ISBN: | 1520-5827 (Electronic) 0743-7463 (Linking) |
| Abstract: | "This work focused on the chemisorption of volatile organic compounds (VOCs) on particulate matter of less than 2.5 mum (PM(2.5)). The detection results illustrated that VOCs on PM(2.5) containing hydroxyl, carbonyl, and ester groups and C(x)H(y) on PM(2.5) were sequentially decreased as 70.02, 21.35, 6.42, and 2.21%, respectively. The chemisorption mechanism showed that the stronger the electronegativity of oxygen-containing functional groups of VOCs, the easier it is to adsorb them on the silicate PM(2.5) due to hydrogen bond formation. Strong electronegative oxygen-containing functional groups readily interacted through hydrogen bonds with silanol groups, which was the main component of PM(2.5), resulting in VOC adsorption on PM(2.5). Negative air ions (NAIs) can weaken the offset ability of the lone pair of electrons in oxygen-containing functional groups in VOCs, which could significantly weaken the possibility of forming hydrogen bonds with silanol groups. Therefore, NAIs can effectively inhibit the adsorption between VOCs and PM(2.5), leading to a significant reduction in VOCs on the surface of PM(2.5)" |
| Notes: | "PubMed-not-MEDLINEZhang, Chaoying Wu, Zengnan Li, Zenghe Li, Haifang Lin, Jin-Ming eng 2020/04/14 Langmuir. 2020 May 12; 36(18):5078-5083. doi: 10.1021/acs.langmuir.0c00109. Epub 2020 Apr 28" |
