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In this paper, authors developed a laboratory scale dielectric barrier discharge (DBD) reactor which generates atmospheric NTP to study the removal of low-concentration formaldehyde (HCHO), a typical indoor air VOC in the built environment associated with cancer and leukemia, under different processing conditions. Strong ionization NTP was generated between the DBD electrodes by a pulse power zero-voltage switching flyback transformer (ZVS-FBT), which caused ionization of air molecules leading to active species formation to convert HCHO into carbon dioxide (CO\n                    <jats:sub>2<\/jats:sub>\n                    ) and water vapor (H\n                    <jats:sub>2<\/jats:sub>\n                    O). The impact of key electrical and physical processing parameters i.e. discharge power (P), initial concentration (C\n                    <jats:sub>in<\/jats:sub>\n                    ), flow rate (F), and relative humidity (RH) which affect the formaldehyde removal efficiency (\u0273) were studied to determine optimum conditions. Results show that, the correlation coefficient (R\n                    <jats:sup>2<\/jats:sup>\n                    ) of removal efficiency dependence on the processing parameters follow the order R\n                    <jats:sup>2<\/jats:sup>\n                    (F)\u2009=\u20090.99\u2009&gt;\u2009R\n                    <jats:sup>2<\/jats:sup>\n                    (RH)\u2009=\u20090.96,\u2009&gt;\u2009R\n                    <jats:sup>2<\/jats:sup>\n                    (C\n                    <jats:sub>in<\/jats:sub>\n                    )\u2009=\u20090.94\u2009&gt;\u2009R\n                    <jats:sup>2<\/jats:sup>\n                    (P)\u2009=\u20090.93. The removal efficiency reached 99% under the optimum conditions of P\u2009=\u20090.6\u00a0W, C\n                    <jats:sub>in<\/jats:sub>\n                    \u2009=\u20090.1\u00a0ppm, F\u2009=\u20090.2 m\n                    <jats:sup>3<\/jats:sup>\n                    \/h, and RH\u2009=\u200965% with no secondary pollution. The study provided a theoretical and experimental basis for the application of DBD plasma for air purification in the built environment.\n                  <\/jats:p>","DOI":"10.1038\/s41598-021-02276-1","type":"journal-article","created":{"date-parts":[[2021,11,24]],"date-time":"2021-11-24T06:02:33Z","timestamp":1637733753000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":62,"title":["Indoor air quality improvement and purification by atmospheric pressure Non-Thermal Plasma (NTP)"],"prefix":"10.1038","volume":"11","author":[{"given":"Prince Junior","family":"Asilevi","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Patrick","family":"Boakye","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sampson","family":"Oduro-Kwarteng","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bernard","family":"Fei-Baffoe","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yen Adams","family":"Sokama-Neuyam","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2021,11,24]]},"reference":[{"key":"2276_CR1","doi-asserted-by":"publisher","first-page":"1","DOI":"10.1186\/s41021-021-00183-5","volume":"43","author":"DS Kang","year":"2021","unstructured":"Kang, D. 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