

FOLLOWUS
1. Key Laboratory of Marine Ecology and Environmental Science Institute of Oceanology Chinese Academy of Sciences
2. Graduate University of Chinese Academy of Sciences
网络首发:2011-05-15,
纸质出版:2011
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Fractal dimensions of flocs between clay particles and HAB organisms[J]. 海洋湖沼学报(英文), 2011,29(3):656-663.
Wang, H., Yu, Z., Cao, X. et al. Fractal dimensions of flocs between clay particles and HAB organisms., Chin. J. Ocean. Limnol. 29, 656–663 (2011). https://doi.org/10.1007/s00343-011-0065-z
Fractal dimensions of flocs between clay particles and HAB organisms[J]. 海洋湖沼学报(英文), 2011,29(3):656-663. DOI: 10.1007/s00343-011-0065-z.
Wang, H., Yu, Z., Cao, X. et al. Fractal dimensions of flocs between clay particles and HAB organisms., Chin. J. Ocean. Limnol. 29, 656–663 (2011). https://doi.org/10.1007/s00343-011-0065-z DOI:
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 (D 2) was 1.92 and three-dimensional fractal dimension (D 3) 2.81
while for the modified clay
D 2 was 1.84 and D 3 was 2.50. The addition of polyaluminum chloride (PACl) lead to a decrease of the repulsive barrier between clay particles
and resulted in lower D 2 and D 3. Due to the decrease of D 3
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 D 3 and D 2 of flocs were the highest
while for Skeletonema costatum
which has filamentous cells
the D 3 and D 2 of flocs were the lowest.
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