{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,16]],"date-time":"2026-01-16T17:15:03Z","timestamp":1768583703783,"version":"3.49.0"},"reference-count":38,"publisher":"MDPI AG","issue":"20","license":[{"start":{"date-parts":[[2019,10,17]],"date-time":"2019-10-17T00:00:00Z","timestamp":1571270400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>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\u20130.5 s, absorption capacity: 10,000\u201334,000%) without an additional external force and immediately absorbed a strong acid solution (0.31\u20130.43 s, 9830\u201310,810%) 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.<\/jats:p>","DOI":"10.3390\/ma12203389","type":"journal-article","created":{"date-parts":[[2019,10,17]],"date-time":"2019-10-17T11:07:59Z","timestamp":1571310479000},"page":"3389","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["An Active Absorbent for Cleanup of High-Concentration Strong Acid and Base Solutions"],"prefix":"10.3390","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9141-6081","authenticated-orcid":false,"given":"Nara","family":"Han","sequence":"first","affiliation":[{"name":"Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseodaero, Yuseong-gu, Daejeon 305-719, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sol","family":"Park","sequence":"additional","affiliation":[{"name":"Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseodaero, Yuseong-gu, Daejeon 305-719, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Byung Kwon","family":"Kaang","sequence":"additional","affiliation":[{"name":"Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseodaero, Yuseong-gu, Daejeon 305-719, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wooree","family":"Jang","sequence":"additional","affiliation":[{"name":"Functional Composite Materials Research Center, Korea Institute of Science and Technology (KIST) Jeonbuk Institute of Advanced Composite Materials, 92 Chudong-ro, Bongdong-eup, Wanju-gun, Jeollabuk-do 55324, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hye Young","family":"Koo","sequence":"additional","affiliation":[{"name":"Functional Composite Materials Research Center, Korea Institute of Science and Technology (KIST) Jeonbuk Institute of Advanced Composite Materials, 92 Chudong-ro, Bongdong-eup, Wanju-gun, Jeollabuk-do 55324, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4546-0732","authenticated-orcid":false,"given":"Won San","family":"Choi","sequence":"additional","affiliation":[{"name":"Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseodaero, Yuseong-gu, Daejeon 305-719, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2019,10,17]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"3024","DOI":"10.1039\/C4CC07715F","article-title":"Hierarchical Layered Double Hydroxide Nanocomposites: Structure, Synthesis and Applications","volume":"51","author":"Gu","year":"2015","journal-title":"Chem. 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