悬浮颗粒的浓度对其在饱和多孔介质中迁移和沉积特性的影响

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

Influence of concentration of suspended particles on transport and deposition characteristics in saturated porous media

Suspended particles transport and deposition in porous media play an important role in pollutant purification,oil exploration,nuclear waste disposal,water-soil conservation.In order to study the effect of suspended particles concentration on the breakthrough curves,4 different suspended particle concentrations have been studied under 3 flow velocities in columns of saturated porous media.The studies show that,under constant suspended particle concentration,the relative concentration is increase with the flow velocity.Meanwhile,under a constant flow velocity,there exists a critical concentration for suspended particles.Below the critical concentration,relative concentration in breakthrough curves is in creased with the suspended particles concentration;but the trend is inversely when the suspended particle concentration is more than the critical value.Besides,the critical concentration of suspended particles is related to the flow velocity;the critical value is increased with the flow velocity.