| 颗粒成像技术用于絮体分形结构研究 |
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| 引用本文： | 钟润生,张锡辉. 颗粒成像技术用于絮体分形结构研究[J]. 深圳信息职业技术学院学报, 2014, 0(3): 77-81 |
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| 作者姓名： | 钟润生 张锡辉 |
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| 作者单位： | 1. 深圳信息职业技术学院交通与环境学院,广东深圳,518172
2. 清华大学深圳研究生院环境工程与管理研究中心,广东深圳,518055 |
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| 基金项目： | 广东省自然科学基金，深圳市基础研究项目 |
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| 摘 要： | 利用颗粒成像技术对硫酸铝形成的高岭土和腐殖酸絮体在破碎后重新生长形成的絮体结构动态变化进行了研究。结果表明，在絮体生长一破碎一再生长过程中，腐殖酸存在时会导致絮体分形维数减小。絮体在生长过程中的分形维数随着粒径增加从1．60增加到1．80，破碎后絮体分形维数重新回到1．60。絮体重新生长形成的絮体的分形维数跟破碎强度有关，较长时间破碎形成的絮体分形维数没有明显变化，短时间破碎形成的絮体分形维数和生长阶段稳定阶段一致。絮体破碎后重构不是生长阶段絮体分形维数增加的原因，而是跟絮体分形尺度不变性及存在多级结构有关。
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| 关 键 词： | 絮体重构 分形维数 腐殖酸 颗粒成像技术 |
Fractal structure of alum flocs during floc growth-breakage-regrowth by particle imaging technique |
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| ZHONG Runsheng,ZHANG Xihui. Fractal structure of alum flocs during floc growth-breakage-regrowth by particle imaging technique[J]. Journal of Shenzhen Institute of Information Technology, 2014, 0(3): 77-81 |
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| Authors: | ZHONG Runsheng ZHANG Xihui |
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| Affiliation: | ZHONG Runsheng, ZHANG Xihui (1. School of Transportation and Environmental Science Shcnzhen Institute of Information Technology, Shenzhen 518172, P.R. China; 2. Research Center for Environmental Engineering ＆ Management, Graduate School at Shenzhen, Tsinghna Unversity, Shenzhen 518055, P.R. China) |
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| Abstract: | Characteristics of changes in fractal structure of alum floes during the floc growth-hreakage-regrowth were investigated. The results showed that the fractal dimensions of alum flocs decreased with the increasing humic acid concentration. The fractal dimension increased from about 1.60 to 1.80 during floc growth, decreased back to 1.60 after floc breakage. The fractal dimension of Mum floes after floc regrowth had a close relationship with breakage time. The fractal dimension of alum floes for 15 minutes breakage had no significantly change during floc regrowth, increased to about 1.80 for 30 seconds breakge. The changes in fractal dimension did not result from the floc restructuring after floc breakage, hut from the scale invariance and multi-level structure of fractal aggregates. |
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| Keywords: | floc structure floc restructuring fractal dimension humic acid particle imaging technique |
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