Image Analysis of Alum Coagulated Mineral Suspensions
Image Analysis of Alum Coagulated Mineral Suspensions
复制标题
DOI：
10.1080/09593331708616505
复制
发表时间：
1996-12
影响因子：
2.8
通讯作者：
B. Gorczyca;J. Ganczarczyk
中科院分区：
文献类型：
--
作者：
B. Gorczyca;J. Ganczarczyk
对四种不同的矿物悬浮液进行混凝，以确定所形成的絮凝体的几何特征是否会随着聚集颗粒的组成而变化。实验中选择的矿物是安大略湖底部沉积物中常见的物质。采用多曝光摄影技术测定了静水柱中絮凝体的沉降速度和粒径。采用计算机图像分析系统BIOQUANT IV测定铝絮凝体的以下物理特性：横截面积、最长尺寸、周长、形状因子、等效圆直径和沉降速度。四种絮凝体的沉降速率差异较大。温度和pH值的变化可能对形成絮凝体的大小有显著影响。四组絮凝体的分形维数不同，其分形维数的差异不能用表面电荷量的不同来解释。
Four different mineral suspensions were coagulated in order to determine whether the geometric characteristics of flocs formed would vary with the composition of aggregating particles. Minerals chosen for the experiment were materials commonly found in Lake Ontario bottom sediments. The settling velocities along with the sizes of the coagulated flocs were measured in a quiescent water column by a multiexposure photography technique. The computerized image analysis system BIOQUANT IV was applied for the determination of the following physical characteristics of aluminium coagulation flocs: cross-sectional area, longest dimension, perimeter, shape factor, equivalent circular diameter and settling velocity. The settling rates of the four types of studied flocs varied significantly. Temperature and pH variations may have had a significant effect on sizes of formed flocs. Fractal dimensions were different for the four sets of flocs, and the differences could not be explained by the various surface charge (stic...