Han, Nara Park, Sol Kaang, Byung Kwon Jang, Wooree Koo, Hye Young Choi, Won San 2024-01-19T19:03:59Z 2024-01-19T19:03:59Z 2021-08-31 2019-10 1996-1944 https://pubs.kist.re.kr/handle/201004/119547 There is significant interest in developing novel absorbents for hazardous material cleanup. Iron oxide-coated melamine formaldehyde sponge (MFS/IO) absorbents with various IO layer thicknesses were synthesized. Various other absorbents were also synthesized and compared to evaluate the absorption capability of the MFS/IO absorbents for strong acid (15%, v/v) and base (50%, m/m) solutions. Specifically, absorbent and solution drop tests, dust tests, and droplet fragment tests were performed. Among the various absorbents, MFS/IO absorbents possessing a needlelike surface morphology showed several unique characteristics not observed in other absorbents. The MFS/IO absorbents naturally absorbed a strong base solution (absorption time: 0.71-0.5 s, absorption capacity: 10,000-34,000%) without an additional external force and immediately absorbed a strong acid solution (0.31-0.43 s, 9830-10,810%) without absorption delay/overflow during absorbent and solution drop tests, respectively. The MFS/IO absorbents were also demonstrated to be ideal absorbents that generated fewer dust particles (semiclass 1 (ISO 3) level of 280 piece/L) than the level of a clean room (class 100). Furthermore, the MFS/IO absorbents were able to prevent the formation of droplet fragments and solution overflow during the solution drop test due to their unique surface morphology and extremely high absorption speed/capacity, respectively. English MDPI CONDUCTIVE CARBON AEROGELS OIL/WATER SEPARATION COPPER-MESH WATER MEMBRANES CATALYSTS An Active Absorbent for Cleanup of High-Concentration Strong Acid and Base Solutions Article 10.3390/ma12203389 1 MATERIALS, v.12, no.20 MATERIALS 12 20 scie scopus 000498402100112 2-s2.0-85074222450 Chemistry, Physical Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Physics, Applied Physics, Condensed Matter Chemistry Materials Science Metallurgy & Metallurgical Engineering Physics Article CONDUCTIVE CARBON AEROGELS OIL/WATER SEPARATION COPPER-MESH WATER MEMBRANES CATALYSTS chemical absorbents iron oxide strong acid and base drop test dust test