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温度和pH对多孔介质中悬浮颗粒渗透迁移的影响

薛传成, 王艳, 刘干斌, 陈航, 李轲轲

薛传成, 王艳, 刘干斌, 陈航, 李轲轲. 温度和pH对多孔介质中悬浮颗粒渗透迁移的影响[J]. 岩土工程学报, 2019, 41(11): 2112-2119. DOI: 10.11779/CJGE201911017
引用本文: 薛传成, 王艳, 刘干斌, 陈航, 李轲轲. 温度和pH对多孔介质中悬浮颗粒渗透迁移的影响[J]. 岩土工程学报, 2019, 41(11): 2112-2119. DOI: 10.11779/CJGE201911017
XUE Chuan-cheng, WANG Yan, LIU Gan-bin, CHEN Hang, LI Ke-ke. Effects of temperature and pH on permeation and migration of suspended particles in porous media[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(11): 2112-2119. DOI: 10.11779/CJGE201911017
Citation: XUE Chuan-cheng, WANG Yan, LIU Gan-bin, CHEN Hang, LI Ke-ke. Effects of temperature and pH on permeation and migration of suspended particles in porous media[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(11): 2112-2119. DOI: 10.11779/CJGE201911017

温度和pH对多孔介质中悬浮颗粒渗透迁移的影响  English Version

基金项目: 国家自然科学基金项目(51678311,51308310); 浙江省自然科学基金项目(LY19E080011); 宁波市社发重大项目(2017C510002)
详细信息
    作者简介:

    薛传成(1994— ),男,硕士研究生,主要研究方向:污染物渗透迁移。E-mail: 785335477@qq.com。

    通讯作者:

    王艳,E-mail:wangyan@nbu.edu.cn

  • 中图分类号: TU411.4

Effects of temperature and pH on permeation and migration of suspended particles in porous media

  • 摘要: 基于悬浮颗粒迁移的经典模型,在颗粒沉积动力学方程中考虑释放效应,求解了瞬时注入情况下悬浮颗粒的一维迁移问题的解析解,同时对两种不同悬浮颗粒(硅微粉和聚苯乙烯微球)进行室内土柱试验,得到不同pH(4,7,10)、不同温度T(20℃,30℃,40℃)和不同流速(0.042,0.127,0.212 cm/s)下的迁移曲线。利用解析解对试验数据进行拟合并确定迁移参数,讨论了温度、流速对迁移参数的影响。研究表明:温度、pH、颗粒种类是影响多孔介质中悬浮颗粒迁移的重要因素,当pH=7,T≤30℃时,悬浮颗粒排斥力起主导作用,pH=7,T>30℃时,布朗运动占主导作用;同时,随着流速的增大,水动力效应增大,温度对浓度峰值的影响不明显;随着pH的增大,聚苯乙烯微球在不同温度时的迁移曲线规律与硅微粉不同。
    Abstract: Based on the classical model for migration of suspended particles, the release effect is considered in the Kinetic equation for deposition of particles, and the analytical solution to the one-dimensional migration problem of suspended particles in case of instantaneous injection is obtained. The soil column experiments are carried out considering two different suspended particles (i.e., silicon powder and polystyrene microspheres), different pH (i.e., 4, 7 and 10), different temperatures (i.e., 20,30 and 40℃) and different flow rates (i.e., 0.042, 0.127 and 0.212 cm/s) to obtain a series of migration curves. The analytical solution is used to fit the experimental data, and the migration parameters are then determined. The effects of temperature and velocity of flows on the migration parameters are discussed, and the temperature, pH and particle type are found to be the important factors affecting the migration of suspended particles in porous media. At pH=7 and T≤30℃, the repulsive force of suspended particles plays a leading role, while the Brownian motion dominates at T >30℃. At the same time, the hydrodynamic effect increases with the increase of the flow rate, and the temperature has little effect on the peak concentration. With the increase of pH, the migration curve of polystyrene microspheres is different from that of silicon powder at different temperatures.
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出版历程
  • 收稿日期:  2018-12-11
  • 发布日期:  2019-11-24

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