Kaang, Byung Kwon Lee, Han Bi Koo, Hye Young Choi, Won San 2024-01-19T16:34:05Z 2024-01-19T16:34:05Z 2022-01-25 2020-09 2168-0485 https://pubs.kist.re.kr/handle/201004/118156 A wastepaper (WP)-based cylindrical hollow air filter (CHAF) is prepared by oxidative heat treatment of WP fragments, followed by vacuum filtration of a WP solution to form a WP column that underwent boring. The CHAF shows excellent PM2.5 removal efficiency (99.12%) and an extremely low pressure drop (4 Pa) at a flow rate of 1.5 m/s because of the structural and chemical characteristics of the CHAF. CHAFs that are connected in series and parallel demonstrate the advantages of an increased removal efficiency and a decreased pressure drop, respectively. Thus, combinations of CHAFs connected in series and parallel further increase the PM2.5 removal efficiency and decrease the pressure drop at a high PM2.5 concentration of 644,000 mu g/m(3) and a high flow rate of 5-10 m/s. The CHAFs are also able to simultaneously remove particulate matter (PM) and formaldehyde (HCHO) at very low concentration levels (below 0.1 ppm). A miniature air cleaner equipped with the CHAF can effectively remove 5 L of PM2.5 at extremely high concentrations of over 650,000 mu g/m(3) and a high flow rate of 5 m/s with a high efficiency (99.24-96.88%), low pressure drop (31-34 Pa), and short removal time (3.5 min) for up to 270 cycles. English American Chemical Society Wastepaper-Based Cylindrical Hollow Air Filter Module for the Removal of Particulate Matter (PM10 and PM2.5) and HCHO Article 10.1021/acssuschemeng.0c03714 1 ACS Sustainable Chemistry & Engineering, v.8, no.37, pp.13984 - 13996 ACS Sustainable Chemistry & Engineering 8 37 13984 13996 N scie scopus 000575352800012 2-s2.0-85092782678 Chemistry, Multidisciplinary Green & Sustainable Science & Technology Engineering, Chemical Chemistry Science & Technology - Other Topics Engineering Article HIGH-EFFICIENCY POLLUTION CONTROL VOCS FILTRATION OXIDATION MEMBRANE WATER air filter particulate matter wastepaper pressure drop removal efficiency air cleaner