Fractal dimensions of flocs between clay particles and HAB organisms
文献类型：CNKI期刊论文
| 作者 | Wang HL(王洪亮); Yu ZM(俞志明) ; Cao XH(曹西华); Song XX(宋秀贤)
|
| 发表日期 | 2011-05-15 |
| 出处 | Chinese Journal of Oceanology and Limnology
 |
| 关键词 | harmful algal blooms modified clay fractal dimensions Heterosigma akashiwo Alexandrium tamarense Skeletonema costatum |
| 英文摘要 | The impact of harmful algal blooms (HABs) on public health and related economics have been increasing in many coastal regions of the world. Sedimentation of algal cells through flocculation with clay particles is a promising strategy for controlling HABs. Previous studies found that removal efficiency (RE) was influenced by many factors, including clay type and concentration, algal growth stage, and physiological aspects of HAB cells. To estimate the effect of morphological characteristics of the aggregates on HAB cell removal, fractal dimensions were measured and the RE of three species of HAB organism, Heterosigma akashiwo, Alexandrium tamarense, and Skeletonema costatum, by original clay and modified clay, was determined. For all HAB species, the modified clay had a higher RE than original clay. For the original clay, the two-dimensional fractal dimension (D2) was 1.92 and three-dimensional fractal dimension (D3) 2.81, while for the modified clay, D2 was 1.84 and D3 was 2.50. The addition of polyaluminum chloride (PACl) lead to a decrease of the repulsive barrier between clay particles, and resulted in lower D2 and D3. Due to the decrease of D3, and the increase of the effective sticking coefficient, the flocculation rate between modified clay particles and HAB organisms increased, and thus resulted in a high RE. The fractal dimensions of flocs differed in HAB species with different cell morphologies. For example, Alexandrium tamarense cells are ellipsoidal, and the D3 and D2 of flocs were the highest, while for Skeletonema costatum, which has filamentous cells, the D3 and D2 of flocs were the lowest. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | Supported by the Fund for Creative Research Groups by National Natural Science Foundation of China (No. 40821004) ; the National Natural Science Foundation of China (No. 40906055) ; the National Basic Research Program of China (973 Program) (No. 2010CB428706) |
| 卷 | v.29期:03页:166-173 |
| 语种 | 英文; |
| 分类号 | S917.4 |
| ISSN号 | 0254-4059 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/191699]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.KeyLaboratoryofMarineEcologyandEnvironmentalScience,InstituteofOceanology,ChineseAcademyofSciences 2.GraduateUniversityofChineseAcademyofSciences |
| 推荐引用方式 GB/T 7714 | Wang HL,Yu ZM,Cao XH,et al. Fractal dimensions of flocs between clay particles and HAB organisms. 2011. |
入库方式： OAI收割
来源：海洋研究所
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