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RISS 인기검색어
- 검색키워드
- 저자 : ( Jacqueline Lalthlengliani ) (검색결과 3 건)
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Attenuation of radiotoxic strontium using immobilized nano-iron oxide sand: Batch and column studies
( Lalhmunsiama ),( Jacqueline Lalthlengliani ),( Diwakar Tiwari ),이승목 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
Iron oxide nano-particles were immobilized onto the surface of natural sand using wet impregnation method. A reasonable amount of iron was loaded onto the sand surface and the immobilized iron particles were stable within a wide pH rangei.e., pH3.0 to 10.0. The surface morphology of iron modified sand and bare sand was obtained by taking the FE-SEM images of these solids. The elemental compositions of the materials were obtained by the EDX analysis. Further, the material is assessed for the attenuation of radiotoxic Sr(Ⅱ) from aqueous solutions under batch and column reactor experiment. The batch studies showed that increasing the sorptive pH significantly favours the uptake of Sr(Ⅱ) and the equilibrium state sorption data under the concentration dependence study fits better to the Langmuir adsorption isotherm rather than the Freundlich adsorption isotherm. The kinetic data obtained is fitted well to both pseudo-first-order and pseudo-second-order kinetic models. Moreover, the breakthrough data is fitted well to non-linear Thomas equation and the loading capacity of Sr(Ⅱ) is estimated.
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Iron-oxide modified sand in the attenuation of radiotoxic cesium from aqueous solutions
( Lalhmunsiama ),( Jacqueline Lalthlengliani ),( Diwakar Tiwari ),이승목 한국공업화학회 2014 한국공업화학회 연구논문 초록집 Vol.2014 No.1
The aim of this investigation is to obtain immobilized small sized iron oxide particles onto the natural sand using the wet impregnation method. The surface morphology of iron modified sand and bare sand is obtained by the SEM-EDX analytical methods. Further, the material is assessed for the attenuation of one of radio logically important Cs(I) from aqueous solutions. The batch studies show that increasing the sorptive pH favours significantly the uptake of Cs(I) and the equilibrium state sorption results under the concentration dependence study, suggests that Freundlich adsorption isotherm is better fitted than Langmuir adsorption isotherm. Kinetic data is fitted well to both pseudo first order and pseudo second order kinetic models. The breakthrough data as obtained by the column studies were fitted well to the Thomas equation and hence, the loading capacity of Cs(I) is estimated.
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Attenuation of radiotoxic ions from aqueous solutions using immobilized iron-oxide sand
( Lalhmunsiama ),( Jacqueline Lalthlengliani ),( Diwakar Tiwari ),이승목 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0
The present work deals with the immobilization of iron oxide nanoparticles onto the surface of natural sand. The synthesized material was employed for the efficient removal of radiotoxic cesium and strontium from aqueous solutions. The surface morphology and elemental compositions of immobilized iron-oxide sand as well as bare sand were obtained by SEM-EDX analysis. Moreover, the materials were characterizedby XRD and FT-IR analyses. Reasonable amount of iron was loaded onto the sand surface and the immobilized iron particles were stable within a wide pH ranges i.e., pH 3.0 to 10.0. Batch experiments showed that increasing the sorptive pH significantly favours Cs(I) and Sr(II) removal and the equilibrium state sorption data under the concentration dependence study reasonably fit to Langmuir and Freundlich adsorption isotherm. Moreover, the breakthrough data were collected and the non-linear Thomas equation was utilized to determine the loading capacity of Cs(I) and Sr(II) using column packed with immobilized iron-oxide sand.
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