收藏本站
收藏 | 投稿 | 手机打开
二维码
手机客户端打开本文

Activated Sericite:An Efficient and Effective Natural Clay Material for Attenuation of Cesium from Aquatic Environment

D.TIWARI  LALHMUNSIAMA  S.I.CHOI  S.M.LEE  
【摘要】:Sericite is mica-based natural clay that is annealed at 800 ℃ for 4 h, followed by acid activation using 3.0 mol L-1HCl at 100℃. The interaction of cesium(I), Cs(I), with sericite could provide useful data for the study of soil erosion or mass water movement utilizing the natural radioactive Cs. In this study sericite and activated sericite were used to assess their suitability in the attenuation of Cs from the aquatic environment under both batch and column experiments. The surface morphological studies indicated that a disordered and heterogeneous surface structure was exhibited by the activated sericite, whereas the native sericite exhibited a compact and layered structure. The Brunauer-Emmett-Teller(BET) specific surface area results indicated a significant increase in the surface area due to the activation of sericite. The batch reactor data collected for various parametric studies revealed that an increase in p H(from 2.0 to 8.0) and sorbate concentration(from 10.0 to 100.0 mg L-1) apparently favored the attenuation of Cs(I). The timedependent sorption data revealed that Cs(I) uptake was very rapid, and it achieved its saturation value within just 50 min of contact.The kinetic modeling studies indicated that the uptake of Cs(I) followed a pseudo-second-order rate equation; hence, the attenuation capacity of these solids for Cs(I) was estimated to be 0.858 and 4.353 mg g-1for sericite and activated sericite solids, respectively.The adsorption isotherm modeling data showed a reasonably good applicability of the Freundlich model than the Langmuir model.The effect of background electrolyte concentrations(0.001 to 0.1 mol L-1) of Mg(NO3)2indicated that the presence of this electrolyte could not significantly affect the percent removal of Cs(I) by activated sericite. Furthermore, the fixed-bed column reactor operations were performed to obtain the breakthrough data, which were fitted well to the Thomas non-linear equation. Therefore, the loading capacity of Cs(I) was estimated to be 1.585 mg g-1at the initial influent Cs(I) concentration of 30.0 mg L-1at p H 5.0.

知网文化
【相似文献】
中国期刊全文数据库 前20条
1 ;STUDY ON SORPTION OF UREA BY MEANS OF MNTAL-POLYMER COMPLEXES[J];Chinese Chemical Letters;1992年08期
2 ;Incorporating sorption/desorption of organic pollutants into river water quality model[J];Journal of Environmental Sciences;2004年04期
3 ;Phosphorus sorption capacities in a headstream landscape—The pond chain structure[J];Journal of Environmental Sciences;2006年05期
4 ;Solubility and sorption of petroleum hydrocarbons in water and cosolvent systems[J];Journal of Environmental Sciences;2008年10期
5 ;Modeling of radionickel sorption on MX-80 bentonite as a function of pH and ionic strength[J];Science in China(Series B:Chemistry);2009年03期
6 ;Influence of organic amendments on the sorption of pentachlorophenol on soils[J];Journal of Environmental Sciences;2009年04期
7 ;Impacts of soil organic matter, pH and exogenous copper on sorption behavior of norfloxacin in three soils[J];Journal of Environmental Sciences;2009年05期
8 ;Effects of temperature and surfactants on naphthalene and phenanthrene sorption by soil[J];Journal of Environmental Sciences;2009年05期
9 ;Effect of biosurfactant on the sorption of phenanthrene onto original and H_2O_2-treated soils[J];Journal of Environmental Sciences;2009年10期
10 Rai S.Kookana;;Enhanced and irreversible sorption of pesticide pyrimethanil by soil amended with biochars[J];Journal of Environmental Sciences;2010年04期
11 ;Characteristics and mechanisms of sorption of organic contaminants onto sodium dodecyl sulfate modified Ca-Al layered double hydroxides[J];Chinese Science Bulletin;2011年32期
12 ;Carbon dioxide sorption and diffusion in coals:Experimental investigation and modeling[J];Science China(Earth Sciences);2012年04期
13 Jintao Wang;Yian Zheng;Aiqin Wang;;Investigation of acetylated kapok fibers on the sorption of oil in water[J];Journal of Environmental Sciences;2013年02期
14 Jianzhong Li;Lu Jiang;Xi Xiang;Shuang Xu;Rou Wen;Xiang Liu;;Competitive sorption between 17α-ethinyl estradiol and bisphenol A/4-n-nonylphenol by soils[J];Journal of Environmental Sciences;2013年06期
15 尹邦跃,王零森,樊毅,张金生;Agglomerate control in the complexing sol-gel process[J];Transactions of Nonferrous Metals Society of China;1999年04期
16 ;Dicyandiamide Sorption-Desorption Behavior on Soils and Peat Humus[J];Pedosphere;2004年03期
17 ;Impact of atrazine and nitrogen fertilizers on the sorption of chlorotoluron in soil and model sorbents[J];Journal of Environmental Sciences;2007年03期
18 ;Effects of humic acid coatings on phenanthrene sorption to black carbon[J];Journal of Environmental Sciences;2007年10期
19 S. GHOSH;P. C. BHOWMIK;;Sorption and Fractionation of a Peat Derived Humic Acid by Kaolinite, Montmorillonite, and Goethite[J];Pedosphere;2009年01期
20 ;Effects of free iron oxyhydrates and soil organic matter on copper sorption-desorption behavior by size fractions of aggregates from two paddy soils[J];Journal of Environmental Sciences;2009年05期
中国重要会议论文全文数据库 前4条
1 ;Linear and non-linear relationships between soil sorption and hydrophobicity:model,validation and influencing factors[A];第六届全国环境化学大会暨环境科学仪器与分析仪器展览会摘要集[C];2011年
2 ;A Rapid-response SAW-based Sensor for H2S Detection[A];2011年全国压电和声波理论及器件应用研讨会报告程序册及摘要集[C];2011年
3 ;The rat bowel of β-asaron absorbs the research[A];两岸三地药理学与临床药理学术会议论文集[C];2008年
4 ;Effect of Dissolved Organic Matter on Mobility and Activation of Chlorotoluron and Prometryne in Soil and Wheat[A];第五届全国环境化学大会摘要集[C];2009年
中国知网广告投放
 快捷付款方式  订购知网充值卡  订购热线  帮助中心
  • 400-819-9993
  • 010-62982499
  • 010-62783978