论文部分内容阅读
多孔介质中悬浮颗粒迁移和沉积特性的研究对地下污染物净化、石油开采、核废料处置、水土保持等有很重要的意义。对4种不同浓度的悬浮颗粒在3种不同的渗流速度下进行室内试验,研究悬浮颗粒的浓度对其迁移和沉积特性的影响。结果表明,在一定的悬浮颗粒浓度下,随着渗流速度的增加,穿透曲线中的悬浮颗粒的相对浓度也增大。同时,渗流速度一定时,悬浮颗粒的浓度存在一个临界值,小于该临界值,穿透曲线中的相对浓度随悬浮颗粒的浓度增大而增大;大于该临界值时,相对浓度随悬浮颗粒的浓度增大而减小。另外,悬浮颗粒的临界浓度是与渗流速度相关的,随着渗流速度增加,悬浮颗粒的临界浓度也逐渐增大。
The study on the migration and deposition characteristics of suspended particles in porous media is of great significance for the purification of underground pollutants, oil exploration, disposal of nuclear waste and soil and water conservation. Four different concentrations of suspended particles were tested at three different seepage velocities to study the effects of suspended particle concentration on their migration and deposition characteristics. The results show that at a certain concentration of suspended particles, the relative concentration of suspended particles in the breakthrough curve also increases with the increase of seepage velocity. At the same time, when the seepage velocity is constant, the concentration of suspended particles has a critical value, which is smaller than the critical value. The relative concentration in the breakthrough curve increases with the concentration of suspended particles. Above the critical value, the relative concentration increases with the suspended particles The concentration increases and decreases. In addition, the critical concentration of suspended particles is related to the seepage velocity, and as the seepage velocity increases, the critical concentration of suspended particles also gradually increases.