多孔介质中铁的吸附分配和迁移特征

Distribution of adsorption and transport characteristics of iron in porous media

为了掌握多孔介质中铁的吸附分配和迁移特征,采用室内试验和数学模拟的方法,研究了地下水中铁的迁移规律。结果表明:天津市7类多孔介质对铁的吸附均符合Langmuir吸附模式;多孔介质颗粒越细,吸附铁的能力较强,铁迁移滞后系数越大,迁移性越差,颗粒较粗,吸附铁的能力较差,铁迁移滞后系数越小,迁移性越好;在多孔介质中,铁随地下水流动的迁移能力极差。该成果对研究地下水中铁的迁移具有一定的参考价值和指导意义。

We study the iron transportation disciplinarian in ground water by way of indoor test and mathematical simulation to find out the distribution of adsorption and transport characteristics of iron in the porous media. The result shows tha the iron adsorption models of 7 kinds of porous media in Tianjin all accord with the Langmuir adsorption model. That means in the porous media, the thinner the grain is, the stronger the adsorption ability of the iron is, so that the iron transport lag coefficient is big and the transport ability of iron in porous media is poor. On the contrary, the smaller the iron transport lag coefficient is, the stronger the iron transport ability in porous media is. In the porous media, the iron transport ability in the ground water flow is poor. That result can be the guidance to the research on iron transport in the ground water.