盐度对蒙脱土动水絮凝影响的研究  

Effect of Salinity on the Hydrodynamic Flocculation of Montmorillonite

作　　者：陆天琳[1] 谢当汉[1] 林捷[1] 蒯宇[1] 

机构地区：[1]河海大学港口海岸与近海工程学院,江苏南京210098

出　　处：《物流工程与管理》2013年第8期132-134,共3页Logistics Engineering and Management

基　　金：河海大学大学生创新创业训练计划(创新训练项目)基金(201205XCX027)

摘　　要：河口三角洲的变迁、拦门沙的形成与发育均与细颗粒泥沙絮凝的沉降特性有关。细颗粒泥沙的絮凝特性,除了在静水试验所揭示的现象以外,还与当地水流的运动状况,以及泥沙在动水中的絮凝沉降特性有关。通过选取单一矿物蒙脱土,利用室内环形水槽,通过调整水槽的流速,得到蒙脱土的起动流速大致为8cm/s～12cm/s,且当水槽内流速为24.5cm/s时,蒙脱土的最佳絮凝盐度为19‰,并从电化学反应、颗粒的碰撞及絮凝体所受到的剪切力及其抗剪强度四方面对试验结果进行解释。Changes of estuarine delta,the formation and development of sandbar are all relevant to the sedimentation characteristics of fine sediment flocculation.In addition to the phenomenon revealed in the hydrostatic test and movement conditions of the local flow,the characteristics of fine sediment flocculation are still related to the hydrodynamic sedimentation characteristics of fine sediment flocculation.By selecting the single mineral montmorillonite and using indoor annulus cistern to complete the experiment.It can get the consequence that montmorillonite starting velocity is approximately 8cm/s-12cm/s by adjusting the flow rate of annulus cistern.And when the flow rate of cistern is 24.5cm/s,the best flocculation salinity of montmorillonite is 19 ‰,.From electrochemical reaction,the particle collisions and shear force acting on the flocculation body and shear strength these four aspects,the experimental results are interpreted.

关 键 词：絮凝 蒙脱土 盐度 动水沉降 环形水槽 

分 类 号：P641.73[天文地球—地质矿产勘探]