泥沙研究2026，Vol.51Issue(3)：1-8,8.DOI:10.16239/j.cnki.0468-155x.2026.03.001
基于Zeta电位及微观形态的极细石英质粉砂絮凝特性研究
Study on the flocculation characteristics of ultrafine quartz silt based on Zeta potential and micromorphology
摘要
Abstract
The flocculation of fine-grained sediment significantly influences their transport behavior and coastal evolution,making it essential to understand their flocculation characteristics and underlying mechanisms.In this study,ultrafine quartz silt was selected as a representative non-clay mineral,with kaolinite serving as a typical clay mineral for comparison.The flocculation behavior of quartz silt particles was investigated by analy-zing the grain size distribution,microscopic morphology,and Zeta potential variations of both samples in NaCl and CaCl2 solutions with varying concentrations.Results indicate that ultrafine quartz silt can flocculate in freshwater,primarily through the aggregation of fine particles.As electrolyte concentration increases,the Zeta potentials of both minerals exhibit an initial sharp increase followed by fluctuations around a stable value.However,the fluctuation centers and amplitudes differ between the two samples.The trend of floc Zeta poten-tial and gradation parameters of non-clay mineral components of particle size less than 8 μm with variation of e-lectrolyte concentration are similar to those of clay minerals.It is suggested that cohesive sediment theory can be applied to estimate floc size and settling velocity for non-clay particles smaller than 8 μm.关键词
石英砂/高岭土/絮凝特性/Zeta电位/微观形态Key words
quartz silt/kaolinite/flocculation characteristics/Zeta potential/micromorphology分类
建筑与水利引用本文复制引用
姚鹏,赵欣,董嘉威,王远,苏敏..基于Zeta电位及微观形态的极细石英质粉砂絮凝特性研究[J].泥沙研究,2026,51(3):1-8,8.基金项目
国家重点研发计划项目(2023YFC3008100) （2023YFC3008100）
国家自然科学基金项目(42476166) （42476166）
江苏省自然资源科技创新项目(JSZRKJ202402) （JSZRKJ202402）
自然资源部华东海岸带野外科学观测研究站开放课题(ORSECCZ2025101) （ORSECCZ2025101）
