期刊文献+

Na_2O-CaO-Al_2O_3-SiO_2-H_2O系胶凝材料水化物对锶离子的吸附性研究 被引量:1

Adsorption Properpoty of Strontium Ion in Cementitious Material Hydration Products from Na_2O-CaO-Al_2O_3-SiO_2-H_2O System
在线阅读 下载PDF
导出
摘要 在35℃恒温水化反应90天条件下,制备了Na2O-CaO-Al2O3-SiO2-H2O系胶凝材料体系水化物,用X射线衍射法(XRD)对水化物进行了表征;用静态吸附法研究了该胶凝材料的化学组成,即(Ca+Na)-(Si+Al)摩尔比C(Ca+Na)/(Si+Al)、Al-Si摩尔比CAl/Si对Sr吸附性能的影响。结果表明,在实验条件下,制备的水化物主要是结晶程度差的C-S-H凝胶;当有Al存在时,生成少量的水化钙铝黄长石。当水化物中C(Ca+Na)/(Si+Al)=0.8时,吸附性能最佳;CAl/Si增大,吸附量增加。当C(Ca+Na)/(Si+Al)=0.8,CAl/Si=0.6时,水化物对Sr2+72h的吸附量可达0.0922mmol.g-1。 The hydration products from Na2O-CaO-Al2O3-SiO2-H2O cementitious material system were synthesized at 35 ℃ for 90 days and characterized by means of X-ray diffraction (XRD).The influence of chemical compositions of the hydration products,i.e.the atomic ratio of (Ca+Na) to (Si+Al) and Al to Si,on adsorption capacity of Sr was investigated by static adsorption method.The results show that the major hydration product is poor crystalline calcium silicate hydrate gel and a small amount of stratlingite generates in the present of Al.The adsorption capacity of the hydration products in which the atomic ratio of (Ca+Na) to (Si+Al) is 0.8 is the best in all environmental specimens.The adsorption capacity of Sr in the hydrate gel increases with the atomic ratio of Al to Si.The adsorption capacity of Sr in the hydrate gel in which the atomic ratio of (Ca+Na) to (Si+Al) and Al to Si is respectively 0.8 and 0.6 is 0.092 2 mmol/g at 72 h.
机构地区 西南科技大学
出处 《辐射防护》 CAS CSCD 北大核心 2010年第3期164-169,共6页 Radiation Protection
基金 西南科技大学国防重点学科实验室重点培育项目
关键词 吸附 Na2O-CaO-Al2O3-SiO2-H2O系胶凝材料 水化物 Strontium Cementitious Material from Na2O-CaO-Al2O3-SiO2-H2O System Hydration Products Adsorption
作者简介 李玉香(1964-),男,1987年7月毕业于四川建筑材料工业学院硅酸盐工程专业,1995年7月毕业于四川大学环境工程专业,获硕士学位,2005年7月毕业于中国工程物理研究院研究生部核燃料循环与材料专业,获博士学位,教授。E—mail:liyuxiang@swust.edu.cn
  • 相关文献

参考文献14

  • 1Komarneni S and Roy DM. Mechanisms of immobilization of nuclear waste elements by cement minerals, cement and mortar[J]. Cem Concr Res, 1981, 11:789-794.
  • 2Crawford RW, Mcculloch C, Angus M, et al. Intrinsic sorption potential of cement components for ^134 Cs [J]. Cem Concr Res, 1984, 14: 595-599.
  • 3Shrivastava OP, Rashmi Shrivastava. Sr^2+ uptake and leachability study on cured aluminum-substituted tobermoriteOPC admixtures [ J ]. Cem Concr Res, 2001, 31: 1251-1255.
  • 4Shrivastava OP, Rashmi Shrivastava. Cation exchange applications of synthetic tobermorite for the immobilization and solidification of cesium and strontium in cement matrix [ J ]. Bull Mater Sci, 2000, 23 (6) : 515-520.
  • 5Sakr K, Sayed MS, Hafez N. Comparison studies between cement and cement-kaolinite properties for incorporation of low-level radioactive wastes [ J ]. Cem Concr Res., 1997, 27(12) : 1919-1926.
  • 6El-Kamash AM, El-Naggar MR, El-Dessouky MI. Immobilization of cesium and strontium radionuclides in zeolite-cement blends[J]. J Hazard Mater, 2006,B136:310-316.
  • 7Plecas IB, Pavlovic RS , Pavlovic SD. Leaching of ^60Co and ^137 Cs from spent ion exchange resins in cement-bentonite clay matrix[ J]. Bull Mater Sci,2003, 26(7) : 699-701.
  • 8Guangren Qian, Darren Delai Sun, Joo Hwa Tay.New aluminium-fich alkali slag matrix with clay minerals for immobilizing simulated radioactive Sr and Cs waste[J]. J Nuel Mater, 2001, 299: 199-204.
  • 9李玉香,易发成,陈雅斓,傅依备.Sr、Cs在碱矿渣-粘土复合水泥水化物粉体中的吸附行为[J].四川大学学报(工程科学版),2005,37(4):59-64. 被引量:16
  • 10Fernanz-Jimenez A, Macphee DE, Lachowski EE, et ai. Immobilization of cesium in alkaline activated fly ash matrix[J]. J Nucl Mater, 2005,346: 185-193.

二级参考文献11

共引文献50

同被引文献6

引证文献1

二级引证文献5

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部