دورية أكاديمية
Influence of Algal Organic Matter on Algal Removal Efficiency by Flocculation of Modified Clay
| العنوان: | Influence of Algal Organic Matter on Algal Removal Efficiency by Flocculation of Modified Clay |
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| المؤلفون: | Mingyong Wang, Bowen Zhang, Xihua Cao, Fang Li, Xiuxian Song, Zhiming Yu |
| المصدر: | Journal of Marine Science and Engineering, Vol 11, Iss 3, p 613 (2023) |
| بيانات النشر: | MDPI AG, 2023. |
| سنة النشر: | 2023 |
| المجموعة: | LCC:Naval architecture. Shipbuilding. Marine engineering LCC:Oceanography |
| مصطلحات موضوعية: | modified clay, algal organic matter, flocculation, harmful algal blooms, removal efficiency, Naval architecture. Shipbuilding. Marine engineering, VM1-989, Oceanography, GC1-1581 |
| الوصف: | Modified clay (MC) technology is the most effective method to control harmful algal blooms (HABs) and has been widely testified in many countries in recent decades. Although dissolved algal organic matter (dAOM) has been found to be abundant in HAB-affected waters, little is known about its effect on MC flocculation. Prorocentrum donghaiense was chosen as the model organism in this study. The flocculation of MC with different concentrations of dAOM was observed by particle image velocimeter, and the removal efficiency of MC to microalgae was determined using a fluorometer. The results showed that a small amount of dAOM resulted in faster flocculation, larger flocs, higher floc strength and better floc regeneration capacity, and the removal efficiency of microalgae by MC could reach about 80%. However, large amounts of dAOM produced during the occurrence of HABs could inhibit the flocculation of MC, and the removal efficiency of microalgae was only about 35%. Furthermore, with the increase of dAOM, the zeta potential of MC particles decreases from 1.56 mV to −18.9 mV, and the repulsive force between the particles also increases. The examination of 18-angle laser light scattering gel permeation chromatography and specific ultraviolet absorption (SUVA254) revealed that some hydrophobic organic macromolecules preferred to attach to MC and increase MC flocculation at a tiny amount of dAOM, while a higher concentration of dAOM would inhibits flocculation by reducing surface activity and intergranular repulsion. According to the findings of this study, the dosage of MC must be increased in order to obtain the best algal removal efficiency with MC. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2077-1312 |
| Relation: | https://www.mdpi.com/2077-1312/11/3/613; https://doaj.org/toc/2077-1312 |
| DOI: | 10.3390/jmse11030613 |
| URL الوصول: | https://doaj.org/article/cb6a8a77b6be4468938f5b2dfbbff50a |
| رقم الأكسشن: | edsdoj.b6a8a77b6be4468938f5b2dfbbff50a |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 20771312 |
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| DOI: | 10.3390/jmse11030613 |