中文摘要：

采用专业的软件对聚合氯化铁一腐殖酸（PFC—HA）絮体二维图像进行灰度解析与高度校正，确定了聚合氯化铁混凝腐殖酸的体系中不同PFC投药量时典型絮体的空间高程分布矩阵；并据此分别计算了PFC絮体的二维分形维数（Ds）、不同方向的Hurst指数及一维自仿射分形维数日．结果表明，不同PFC投药量下，利用TPSAM、PCM、CCM和ICCM等方法计算的絮体二维D。值均大于2．0，符合分形维数的定义；而且这些D。值均随着投药量的增加而降低，说明在吸附电中和作为混凝的主要机理时形成的絮体空间填充能力稍微大一些，形貌涨落趋势稍强，高频成分多；而随着聚合氯化铁的沉淀、表面吸附和卷扫絮凝过程的出现，PFC—HA絮体变得较为密实，其空间填充能力稍低，形貌涨落较为平缓，空间波长相对长，微观结构稍微简单一些．此外，同一PFC投药量下，絮体空间不同方向上的Hurst指数和一维自仿射分形维数均呈现不同的数值，表明絮体具有空间各向异性．

英文摘要：

The morphological gray of polyferric analyzed through a professional software, chloride-humic acid （PFC-HA） flocs two-dimensional images was and the corresponding height of the rough surface of PFC-HA floes based on above gray was calibrated. Then, the space height distribution matrixes of typical flocs produced under different PFC dosages were identified as well. Fractal dimension （D~）, Hurst indices and self-affine fractal dimensions （D~） in different directions on the PFC-HA floc were calculated accordingly. The results showed that all the DS values of PFC-HA flocs under different PFC dosages are greater than 2.0, which were calculated through the following four methods：Triangular Prism Surface Area Method （TPSAM）, Projective Covering Method（PCM）, Cubic Covering Method（CCM） and Improved Cubic Covering Method（ICCM）. It＇s obvious that these Ds values are consistent with the definition of fractal dimension. Also the DB are reduced slightly with the increasing of PFC dosage, which implied that PFC-HA flocs formed under adsorption and charge neutralization mechanism have a slight larger space-filling capacity, and showed stronger fluctuation and more high-frequency components in space morphology. As the surface adsorption/complexation and sweep flocculation mechanism gradually appeared, PFC-HA flocs displayed a slight more compact and simpler microstructure, and the smaller space-filling capacity, gentle fluctuation and longer wave should exist in their space morphology. In addition, both Hurst indices and D~ values in different direction on PFC-HA floes, being formed under the same PFC dosage, were different from each other, which demonstrated that surface of PFC- HA floes was anisotropie.