Kim, Byoung Chan Lee, Jinwoo Um, Wooyong Kim, Jaeyun Joo, Jin Lee, Jin Hyung Kwak, Ja Hun Kim, Jae Hyun Lee, Changha Lee, Hongshin Addleman, R. Shane Hyeon, Taeghwan Gu, Man Bock Kim, Jungbae 2024-01-20T16:30:22Z 2024-01-20T16:30:22Z 2021-09-05 2011-09-15 0304-3894 https://pubs.kist.re.kr/handle/201004/129986 We have synthesized two different magnetic mesoporous materials that can be easily separated from aqueous solutions by applying a magnetic field. Synthesized magnetic mesoporous materials, Mag-SBA-15 (magnetic ordered mesoporous silica) and Mag-OMC (magnetic ordered mesoporous carbon), have a high loading capacity of contaminants due to high surface area of the supports and high magnetic activity due to the embedded iron oxide particles. Application of surface-modified Mag-SBA-15 was investigated for the collection of mercury from water. The mercury adsorption using Mag-SBA-15 was rapid during the initial contact time and reached a steady-state condition, with an uptake of approximately 97% after 7 h. Application of Mag-OMC for collection of organics from water, using fluorescein as an easily trackable model analyte, was explored. The fluorescein was absorbed into Mag-OMC within minutes and the fluorescent intensity of solution was completely disappeared after an hour. In another application. Mag-SBA-15 was used as a host of tyrosinase, and employed as recyclable catalytic scaffolds for tyrosinase-catalyzed biodegradation of catechol. Crosslinked tyrosinase in Mag-SBA-15, prepared in a two step process of tyrosinase adsorption and crosslinking, was stable enough for catechol degradation with no serious loss of enzyme activity. Considering these results of cleaning up water from toxic inorganic and organic contaminants, magnetic mesoporous materials have a great potential to be employed for the removal of environmental contaminants and potentially for the application in large-scale wastewater treatment plants. (C) 2011 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV SELF-ASSEMBLED MONOLAYERS MOLECULAR-SIEVES MESOSTRUCTURED SILICA ACTIVATED CARBON ADSORPTION SEPARATION SUPPORTS NANOMATERIALS SURFACES IMPACT Magnetic mesoporous materials for removal of environmental wastes Article 10.1016/j.jhazmat.2011.06.022 1 JOURNAL OF HAZARDOUS MATERIALS, v.192, no.3, pp.1140 - 1147 JOURNAL OF HAZARDOUS MATERIALS 192 3 1140 1147 scie scopus 000295236800028 2-s2.0-80052025963 Engineering, Environmental Environmental Sciences Engineering Environmental Sciences & Ecology Article SELF-ASSEMBLED MONOLAYERS MOLECULAR-SIEVES MESOSTRUCTURED SILICA ACTIVATED CARBON ADSORPTION SEPARATION SUPPORTS NANOMATERIALS SURFACES IMPACT Magnetic mesoporous materials Adsorption Mercury Tyrosinase Catehcol degradation