广东省水动力学应用研究重点实验室 / 广东省水利水电科学研究院,广东 广州 510635
邓智瑞(1990年生),男;研究方向:水力学及河流动力学;E-mail: dzhirui@foxmail.com
宫鹏杰(1984年生),男;研究方向:水力学及河流动力学;E-mail: 271527349@qq.com
收稿:2024-09-04,
修回:2025-04-19,
录用:2025-04-21,
网络出版:2025-06-17,
纸质出版:2025-09-25
移动端阅览
邓智瑞,宫鹏杰.微藻的絮凝过程和絮团特性[J].中山大学学报(自然科学版)(中英文),2025,64(05):11-18.
DENG Zhirui,GONG Pengjie.Microalgal flocculation processes and floc characteristics: Case studies with Chlorella sp. and Nitzschia palea[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2025,64(05):11-18.
邓智瑞,宫鹏杰.微藻的絮凝过程和絮团特性[J].中山大学学报(自然科学版)(中英文),2025,64(05):11-18. DOI: 10.13471/j.cnki.acta.snus.ZR20240271.
DENG Zhirui,GONG Pengjie.Microalgal flocculation processes and floc characteristics: Case studies with Chlorella sp. and Nitzschia palea[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2025,64(05):11-18. DOI: 10.13471/j.cnki.acta.snus.ZR20240271.
为揭示不同体积分数(
φ
)条件下微藻的絮凝过程和絮团特性,选取小球藻(
Chlorella
sp.)、谷皮菱形藻(
Nitzschia palea
)为代表性藻类,开展环形水槽控制实验研究。实验结果表明,小球藻的絮团粒径随着
φ
(样品)的增加而增大,从
φ
(样品)=0.02%时约8 μm增至
φ
(样品)=0.08%时约22 μm。相较之下,菱形藻的絮团粒径在相同条件下呈现相反趋势,从
φ
(样品)=0.02%时约20 μm降至
φ
(样品)=0.08%时约13 μm。 小球藻的粒径分布随
φ
(样品)增加而发生显著变化,由分散颗粒逐渐聚合形成大颗粒絮团,而菱形藻则没有明显的絮凝倾向。 此外,小球藻在
φ
(样品)
=
0.06%时显示出快速的絮凝现象,形成的絮团粒径是
φ
(样品)低值时的2倍以上。 研究发现微藻的形态对其絮凝行为有显著影响,小球藻的球形结构比菱形藻的菱形结构更易于絮凝,此外,微藻的分泌物等特性也可能导致其絮凝效果差异。 研究结果为理解微藻絮凝过程提供了重要参考,并有助于研究水体中物质输运过程。
This study aimed to elucidate the flocculation dynamics and floc characteristics of microalgae under varying volume fractions. Using
Chlorella
sp. and
Nitzschia palea
as model species, we conducted controlled experiments in an annular flume to systematically analyze the response of algal aggregation to hydrodynamic conditions. Experimental results demonstrated that the floc size of
Chlorella
sp. exhibited a concentration-dependent increase, expanding from approximately 8 μm at 0.02% to 22 μm at 0.08%. In contrast,
N. palea
displayed an inverse trend under identical conditions, with floc size decreasing from approximately 20 μm at 0.02% to 13 μm at 0.08%. Significant alterations in particle size distribution were observed in
Chlorella
sp., transitioning from dispersed particles to large aggregated flocs
with increasing concentrations, while
N. palea
maintained limited flocculation propensity. Notably,
Chlorella
sp. exhibited rapid flocculation at 0.06%, forming flocs exceeding double the size observed at lower concentrations. The research findings indicate that the morphology of microalgae has a significant influence on their flocculation behavior. The spherical structure of
Chlorella
sp. facilitates flocculation more readily than the rhomboid structure of
N. palea
, furthermore, characteristics such as algal secretions may also lead to variations in flocculation efficiency. These findings provide critical insights into microalgal flocculation mechanisms and offer valuable references for understanding material transport processes in aquatic systems.
曹晶 , 刘建辉 , 储昭升 , 等 , 2015 . 鄱阳湖水体颗粒物对3种典型藻类的生长及絮凝作用 [J]. 环境科学学报 , 35 ( 5 ): 1318 - 1324 .
洪松 , 2006 . 水体沉积物重金属质量基准研究 [D]. 北京 : 北京大学 .
刘静 , 2013 . 东江流域底栖硅藻多样性及集合群落的研究 [D]. 广州 : 暨南大学 .
BRINKMANN B W , VONK J A , BEUSEKOM S A M , et al , 2019 . Benthic hotspots in the pelagic zone: Light and phosphate availability alter aggregates of microalgae and suspended particles in a shallow turbid lake [J]. Limnol Oceanogr , 64 ( 2 ): 585 - 596 .
CAO J , WANG P , CHU Z , et al , 2018 . Effect of aquatic particles on the flocculation of M. aeruginosa and Nitzschia [J]. Environ Eng Sci , 35 ( 10 ): 1109 - 1116 .
DE LUCAS PARDO M A , BAKKER M , VAN KESSEL T , et al , 2013 . Erodibility of soft freshwater sediments in markermeer: The role of bioturbation by meiobenthic fauna [J]. Ocean Dyn , 63 ( 9/10 ): 1137 - 1150 .
DENG Z , 2022 . The role of algae in fine cohesive sediment flocculation [D]. Delft : Delft University of Technology .
DENG Z , HE Q , CHASSAGNE C , et al , 2021 . Seasonal variation of floc population influenced by the presence of algae in the Changjiang (Yangtze river) estuary [J]. Mar Geol , 440 : 106600 .
DENG Z , HE Q , MANNING A J , et al , 2023 . A laboratory study on the behavior of estuarine sediment flocculation as function of salinity, EPS and living algae [J]. Ma Geo , 459 : 107029 .
DENG Z , HUANG D , HE Q , et al , 2022 . Review of the action of organic matter on mineral sediment flocculation [J]. Front Earth Sci , 10 : 965919 .
DROPPO I G , LEPPARD G G , FLANNIGAN D T , et al , 1997 . The freshwater floc: A functional relationship of water and organic and inorganic floc constituents affecting suspended sediment properties [M]//EVANS R D,et al,eds. Interact Sediments Water . Dordrecht : Springer Netherlands: 43 - 53 .
DROPPO I G , ONGLEY E D , 1992 . The state of suspended sediment in the freshwater fluvial environment: A method of analysis [J]. Water Res , 26 ( 1 ): 65 - 72 .
FETTWEIS M , BAEYE M , 2015 . Seasonal variation in concentration, size, and settling velocity of muddy marine flocs in the benthic boundary layer [J]. J Geophys Res Oceans , 120 ( 8 ): 5648 - 5667 .
GRATIOT N , MANNING A J , 2004 . An experimental investigation of floc characteristics in a diffusive turbulent flow [J]. J Coast Res(Special Issue No . 41 ): 105 - 113 .
GUO J , ZHENG Y , TENG J , et al , 2021 . Characteristics of spatial distribution for microbial ecology inside and outside source water reservoir [J]. J Clean Prod , 311 : 127697 .
HO Q N , FETTWEIS M , SPENCER K L , et al , 2022 . Flocculation with heterogeneous composition in water environments: A review [J]. Water Res , 213 : 118147 .
KIM TIAM S , LAVOIE I , DOOSE C , et al , 2018 . Morphological, physiological and molecular responses of Nitzschia palea under cadmium stress [J]. Ecotoxicology , 27 ( 6 ): 675 - 688 .
LAVIALE M , BEAUSSART A , ALLEN J , et al , 2019 . Probing the Adhesion of the Common Freshwater Diatom Nitzschia palea at Nanoscale [J]. ACS Appl Mater Interfaces , 11 ( 51 ): 48574 - 48582 .
LEE B J , FETTWEIS M , TOORMAN E , et al , 2012 . Multimodality of a particle size distribution of cohesive suspended particulate matters in a coastal zone: A multimodal psd of cohesive sediments [J]. J Geophys Res Oceans , 117 (C3).
PROCHNOW J V , SPORK V , JAHNKE J , et al , 2001 . Using dissolved and particulate carbon for the prediction [J]. Phys Chem Earth Part B Hydrol Oceans Atmosphere , 26 ( 1 ): 53 - 58 .
PUGAZHENDHI A , SHOBANA S , BAKONYI P , et al , 2019 . A review on chemical mechanism of microalgae flocculation via polymers [J]. Biotechnol Rep, 21: e 00302 .
ROUND F E , 1981 . The ecology of algae [M]. Cambridge [Eng.]; New York : Cambridge University Press .
SADIQ I M , DALAI S , CHANDRASEKARAN N , et al , 2011 . Ecotoxicity study of titania (TiO 2 ) NPs on two microalgae species: Scenedesmus sp. and Chlorella sp .[J]. Ecotoxicol Environ Saf , 74 ( 5 ): 1180 - 1187 .
SAFAR Z , DENG Z , CHASSAGNE C , 2023 . Applying a logistic growth equation to model flocculation of sediment in the presence of living and dead organic matter [J]. Front Mar Sci , 10 : 1227849 .
SINGH H M , SHARMA M , TYAGI V V , et al , 2023 . Potential of biogenic and non-biogenic waste materials as flocculant for algal biomass harvesting: Mechanism, parameters, challenges and future prospects [J]. J Environ Manage , 337 : 117591 .
WALSBY A E , 1968 . Mucilage secretion and the movements of blue-green algae [J]. Protoplasma , 65 ( 1/2 ): 223 - 238 .
WANG J , LIU Q , ZHAO X , et al , 2019 . Molecular biogeography of planktonic and benthic diatoms in the Yangtze River [J]. Microbiome , 7 ( 1 ): 153 .
XIA J , HU H , GAO X , et al , 2024 . Phytoplankton diversity, spatial patterns, and photosynthetic characteristics under environmental gradients and anthropogenic influence in the Pearl River Estuary [J]. Biology , 13 ( 7 ): 550 .
YE L , PENALOZA-GIRALDO J A , MANNING A J , et al , 2023 . Biophysical flocculation reduces variability of cohesive sediment settling velocity [J]. Commun Earth Environ , 4 ( 1 ): 1 - 9 .
ZHANG Y , XU Y , ZHANG N , et al , 2025 . Measured and predicted floc size of cohesive sediment in the presence of microalgae [J]. Water Res , 268 : 122519 .
0
浏览量
137
下载量
0
CSCD
关联资源
相关文章
相关作者
相关机构
京公网安备11010802024621
