摘要
研究天然胶体在多孔介质中迁移沉积及环境效应,对土壤及地下水污染防治措施的选择与实践具有重要意义。以天然胶体作为实验材料,结合土柱实验和水槽搅拌实验,研究三种强度的水动力扰动对天然胶体的迁移和沉积特性及铜行为的影响。结果表明:胶体浓度一定时(土柱63mg/L),水动力扰动越强(最大流速约330mL/h),天然胶体越易穿透,达到平衡的时间越短,且平衡浓度越高;水动力扰动作用下,天然胶体对铜在多孔介质中的迁移起促进作用,而铜的吸附降低了天然胶体的迁移性。
The research on transport,deposition and environmental effect of natural colloid in porous media plays an important role in the prevention and management of soil and groundwater pollution.Taking natural colloid as experiment material,combining the test of soil column and water stir,the paper studied the effect of 3 different hydrodynamics on transport,deposition and copper behavior of natural colloids.The results indicated that when there is a constant concentration of colloid(soil columns:63 mg /L),the stronger the stir of water dynamics becomes,the easier the natural colloid is penetrated thrugh,the shorter the time of reaching balance,the higher the quilibrium concentration becomes.Under the role of hydrodynamics disturbance,the natural colloid play a promotion role for copper in transport of porous media,but copper adsorption decreases the mobility of natural colloid.
引文
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