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| Adsorption of nitrogen and water vapor by sliding zone soils of Huangtupo landslide |
| CHEN Qiong1, XIANG Wei1, 2, CUI De-shan1, 2, LIU Qing-bing2, ZHANG Qian1 |
| 1. Faculty of Engineering, China University of Geosciences, Wuhan 430074, China; 2. Three Gorges Research Center for Geo-hazard, Ministry of Education, China University of Geosciences, Wuhan 430074, China |
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Abstract In order to study the adsorption of water vapor and nitrogen by sliding zone soils of Huangtupo landslide, the specific surface area and pore size analyzer instrument of Autosorb-iQ of United States and the F-sorb3400 of China are taken. The adsorption tests on water vapor at 293 K and nitrogen at 77 K under drying samples and vacuum freeze-dried samples of sliding zone soils are carried out. The theories of Brunauer-Emmet and Teller (BET) and Frenkel-Halsey-Hill (FHH) are taken to calculate the specific surface area and surface fractal dimension. The test results show that the specific surface area calculated by water vapor adsorption is larger than that by nitrogen. The adsorption volume of water vapor on per unit mass sliding zone soils is more than that of nitrogen. It is found that smaller water vapor molecules can get into the micropore and adsorb on the clay mineral surfaces and intralayer with function of polar, which makes the surface cations of clay mineral hydrate and makes the adsorbed water surface more smooth. On the contrary, the bigger nitrogen molecules cannot get into all the micropore and the surface of nitrogen adsorbed seems to be more uneven. The adsorption capacity of water vapor in dried samples is weaker than that of the freeze-dried samples because of weak hydrogen bonds.
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Received: 28 June 2012
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[1] HUNDAL L S, PARISHA N S. Adsorption-desorption kinetics of potassium as influenced by temperature and background anions[J]. Geoderma, 1998,833/4:215-225.
[2] 唐晓武,应 丰,寇乃羽,等. 吸附离子对粉质粘土及改良土特性的影响[J]. 岩土力学, 2010,318:2519-2524. TANG Xiao-wu, YING Feng, KOU Nai-yu, et al. Effects of cation adsorption on properties of silt clay and mixed dredged soil[J]. Rock and Soil Mechanics, 2010, 318
[3] BALA P, BHARDWAJ S S, SIDHU P S. Kinetics of phosphate adsorption by alluvial soils at different temperatures[J]. Asian Journal of Chemistry, 1999,113:996-1000.
[4] 谢海建,陈仁朋,陈云敏,等. 考虑非线性吸附时污染物在半无限黏土中的一维扩散解[J]. 岩土工程学报, 2007,99:1404-1408. XIE Hai-jian, CHEN Ren-peng, CHEN Yun-min, et al. Analytical solution of contaminant diffusion through semi-infinite clay under non-linear adsorption condition[J]. Chinese Journal of Geotechnical Engineering, 2007, 99
[5] 张金利,杨 庆,栾茂田. 非线性吸附条件下填埋场污染物运移过程二维数值分析[J]. 岩土工程学报, 2008,303:354-360. ZHANG Jin-li, YANG Qing, LUAN Mao-tian.
Two-dimensional numerical analysis of landfill contaminant migration considering non-linear adsorption[J]. Chinese Journal of Geotechnical Engineering, 2008, 303: 354-360. (in Chinese)
[6] 谭罗荣,孔令伟. 特殊岩土工程土质学[M]. 北京: 科学出版社, 2006.TAN Luo-rong, KONG Ling-wei.
Special geotechnical engineering soil property[M]. Beijing: Science Press, 2006. (in Chinese)
[7] MAYER L M, XING B. Organic matter-surface area relationships in acid soils[J]. Soil Science Society of America Journal, 2001,651:250-258.
[8] 近藤精一,石川达雄,安部郁夫. 吸附科学[M]. 北京: 化学工业出版社, 2005.SEIICHI Kondo, TATSUO Ishikawa, IKUO Abe. Adsorption science[M]. Beijing
[9] SOKOLOWSKA Z, BOROWKO M, Reszko0Zygmunt J,et al. Adsorption of nitrogen and water vapor by alluvial soils[J]. Geoderma, 2002,1071/2:33-54.
[10] PFEIFER P, AVNIR D. Chemistry in noninteger dimensions between two and three[J]. Chem Phys, 1983,797:3558-3565.
[11] 邵明安,王全九,黄明斌. 土壤物理学[M]. 北京: 高等教育出版社, 2006.SHAO Ming-an, WANG Quan-jiu, HUANG Ming-bin.
Soil physics[M]. Beijing: Higher Education Press, 2006. (in Chinese)
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