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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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Concerns have been raised over the impact of nano materials on soil and groundwater environment with the increasing attention to the potential applications of carbon nano materials in various fields. Particularly, carbon nano materials introduced into water environment readily make complexes with humic acid (HA) due to their hydrophobic nature, so there have been increasing numbers of studies on the interaction between HA and carbon nano materials. In this study, we investigated the solubility of HA and multiwalled carbon nanotubes (MWCNT) in three different surfactant solutions of sodium dodecyl sulfate (SDS), Brij 30 and Triton X-100, and evaluated whether the HA can be effectively desorbed from the surface of MWCNT by surfactant. The objective of this study was to determine the optimal adsorption condition for HA to MWCNT. Futhermore, sodium dodecyl sulfate (SDS), Brij 30, Triton X-100 were used to elucidate the effect of desorption and separation on adsorbed HA on MWCNT. As a result, HA solution with 12.7 mg of total organic carbon (TOC) and 5 mg of MWCNT showed the highest adsorption capacity at pH 3 reacted for 72 hrs. Weight solubilizing ratio (WSR) of surfactants on HA and MWCNT was calculated. HA had approximately 2 times lower adsorption capacity for the applied three surfactants compared to those of MWCNT, implying that the desorption of HA may occur from the HA/MWCNT complex. According to the results of adsorption isotherm and weight solubilizing ratio (WSR), the most effective surfactants was the SDS 1% soluiton, showing 53.63% desorption of HA at pH 3.
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참고문헌 (26)
참고문헌 신청
Ahna, C. K. / 2008 / Soil washing using various nonionic surfactants and their recovery by selective adsorption with activated carbon / J. Hazard. Mater. 154(1):153~160
Arnaud M. / 2006 / Cellular toxicity of carbon-based nanomaterials / Nano Lett. 6(6):1121~1125
Buffle, J. / 1990 / Complexation reactions in aquatic systems, an analytical approach / Ellis Horwood :692
Chen, W. / 2007 / Adsorption of polar and nonpolar organic chemicals to carbon nanotubes / Environ. Sci. Technol 41:8295~8300
Chiou, C. T. / 1986 / Water solubility enhancement of some organic pollutants and pesticides by dissolved humic and fulvic acids / Environ. Sci. Technol. 20:502~507
Arnaud M. / 2006 / Cellular toxicity of carbon-based nanomaterials / Nano Lett. 6(6):1121~1125
Buffle, J. / 1990 / Complexation reactions in aquatic systems, an analytical approach / Ellis Horwood :692
Chen, W. / 2007 / Adsorption of polar and nonpolar organic chemicals to carbon nanotubes / Environ. Sci. Technol 41:8295~8300
Chiou, C. T. / 1986 / Water solubility enhancement of some organic pollutants and pesticides by dissolved humic and fulvic acids / Environ. Sci. Technol. 20:502~507
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