摘要
为了探究不同因素对土壤胶体在多孔介质中的运移,本次研究采集密怀顺某处河床土并从中提取土壤胶体,采用细石英砂,孔隙度n=0.42,作为多孔介质设计穿透批试验。探究影响因素为pH值,离子强度和胶体粒径,并探究实验结果是否符合经典DLVO理论。试验结果表面,三种因素均对穿透有较大影响。胶体在中性条、小粒径和低离子强度条件下有较好穿透能力,有最大胶体出流相对浓度c/c0最大值0.85。结合DLVO理论显示,试验结果基本符合经典DLVO理论,在酸性条件下出现不符。
In order to explore the migration of soil colloids in porous media by different factors,a river bed soil in Mihuashun was collected and soil colloids were extracted from it.Fine quartz sand with porosity n=0.42 was used as porous media to design a penetration batch test.The influencing factors are pH value,ionic strength and colloidal particle size,and whether the experimental results conform to the classical DLVO theory.On the surface of the test results,all three factors have great influence on the penetration.Colloids have good penetration ability under neutral strip,small particle size and low ionic strength conditions,and the maximum relative concentration of colloid outflow is 0.85.Combining with DLVO theory,the experimental results basically conform to the classical DLVO theory,and there is a discrepancy under acidic conditions.
作者
张凡
张永祥
王祎啸
Zhang Fan;Zhang Yongxiang;Wang Yixiao(Institute of Civil Engineering,Beijing Key Lab of Water Quality Science and Water Environmental Restoration Engineerin,Beijing University of Technology,Beijng100124,China)
出处
《山东化工》
CAS
2019年第13期227-231,233,共6页
Shandong Chemical Industry
基金
京津冀水资源安全保障技术研发集成与示范应用(2016YFC0401404)
2016年国家重点研发计划
