摘要
研究了水力条件、物理化学条件等因素对絮凝体分形维数的影响，用聚合氯化铝做絮凝试验，观察絮凝体的电镜照片并计算了絮凝体的分形维数，结果表明，当水力停留时间从低于标准停留时间的20．00％逐渐增加到超过33．30％时，絮凝体的分形维数数值从低于标准值的5．13％逐渐增加到高于标准值的16．03％；絮凝剂投加量最佳时分形维数最大，投加量不足时分形维数的数值下降了17．06％～33．15％，投加最过量时分形维数的数值下降了22．65％-35．63％；实验表明絮凝体的分形维数与絮凝条件有显著的相关性，可以作为絮凝效果定量化研究的参数。
The flocculation experiment using PAC was carried out to study the impact of the physico-chemical condition of micro-organic-polluted water and hydraulic condition on fractal dimension of aggregated floc by scanning the electron microscope photos. The results showed that the fractal dimension increases from 5.13% lower than the standard to higher 16.03% when residence time from 20.00% shorter than the reference time to longer 33.30%, the fractal dimension is the biggest when the coagulant dosage is optimal, and the fractal dimension of aggregated floc decreases by 17.06% -31.5% and increases to 24.39% -28.13% when the coagulant dosage is short and excessive separately. The results showed that the fractal dimension has good response to the flocculation factor, and it can be used as a parameter of quantitative analysis of flocculation efficiency.
出处
《四川大学学报（工程科学版）》
EI
CAS
CSCD
北大核心
2006年第6期79-82,共4页
Journal of Sichuan University (Engineering Science Edition)
基金
建设部科技资助项目(2001-45)
重庆市科技项目(CSTC2006AB7020)
关键词
絮凝
分形维数
微污染源水
flocculation
fractal dimension
micro-organic-polluted- water
