Hydrothermal synthesis of magnetic carbon microspheres for effective adsorption of Cd(II) in water
| Autor: | Yi-Jian Zhong, Xuan Zhou, Nanqi Ren, Yang Gan, Xiu-Heng Wang, Shijie You |
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| Rok vydání: | 2013 |
| Předmět: |
Langmuir
Renewable Energy Sustainability and the Environment Coprecipitation General Chemical Engineering Organic Chemistry Inorganic chemistry Oxide chemistry.chemical_element Nanoparticle Pollution Inorganic Chemistry chemistry.chemical_compound Fuel Technology Adsorption chemistry Wastewater Water environment Waste Management and Disposal Carbon Biotechnology |
| Zdroj: | Journal of Chemical Technology & Biotechnology. 89:1051-1059 |
| ISSN: | 0268-2575 |
| DOI: | 10.1002/jctb.4200 |
| Popis: | BACKGROUND: Heavy metals present a great challenge due to pollution of the water environment. Conventional adsorption materials may be problematic for sustainable applications due to energy-intensive processing, low adsorption capacity and difficult liquid/solid separation. To address this issue, this study investigated monosaccharide biomass (i.e. glucose) as startingmaterial forhydrothermalsynthesis of carbonmicrospheres (CMS),followed by immobilizationof magneticiron oxide nanoparticles by a chemical co-precipitation method. RESULTS:Theresultsdemonstratedthatthehydrothermalmethodcouldyieldhigh-qualityhomogeneouscarbonmicrospheres (0.2−0.6 µm in diameter) with abundant oxygen-containing functional groups. The alkali treatment and chemical coprecipitation process produced magnetic Fe3O4 nanoparticles (10‐20 nm) uniformly dispersed on the CMS surface. The MCMS exhibited effective adsorption of Cd(II) ions in water, which was consistent with quasi-second-order kinetics and Langmuir isotherms. On reaching adsorption equilibrium, the MCMS could be separated from the liquid phase instantly and completely in the presence of an applied external magnetic field gradient. CONCLUSION:TheMCMSsynthesizedbyahydrothermalandco-precipitationmethodshowgreatpromiseasanewsustainable carbon-based adsorbent for potential application in the elimination of heavy metals from water and wastewater. c � 2013 Society of Chemical Industry |
| Databáze: | OpenAIRE |
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