Removal of Microcystis aeruginosa by ultrasound: Inactivation mechanism and release of algal organic matter

Yuan, Kong; Peng, Yazhou; Zhang, Zhi; Zhang, Meng; Zhou, Yuanhang; Duan, Zhuang

doi:10.1016/j.ultsonch.2019.04.017

Cited by 90 publications

(24 citation statements)

References 42 publications

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“…Some commonly used engineering controls at drinking water treatment plants (DWTPs) are filtration, ozonation, coagulation, chlorination, reverse osmosis, photocatalysis, potassium permanganate, and powdered activated carbon [15,[29][30][31][32][33][34][35][36][37]. However, newer techniques are being explored, such as inactivation by ultrasound, biological approaches for neutralizing toxins, starch-based flocculation, silica-quaternary ammonium nanofilm-coated fiberglass mesh, and engineered polysaccharide lyases [33,[38][39][40][41].…”

Section: Microcystin-lrmentioning

confidence: 99%

Recent Advancements in the Removal of Cyanotoxins from Water Using Conventional and Modified Adsorbents—A Contemporary Review

Abbas

Kajjumba

Ejjada

et al. 2020

Water

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The prevalence of cyanobacteria is increasing in freshwaters due to climate change, eutrophication, and their ability to adapt and thrive in changing environmental conditions. In response to various environmental pressures, they produce toxins known as cyanotoxins, which impair water quality significantly. Prolonged human exposure to cyanotoxins, such as microcystins, cylindrospermopsin, saxitoxins, and anatoxin through drinking water can cause severe health effects. Conventional water treatment processes are not effective in removing these cyanotoxins in water and advanced water treatment processes are often used instead. Among the advanced water treatment methods, adsorption is advantageous compared to other methods because of its affordability and design simplicity for cyanotoxins removal. This article provides a current review of recent developments in cyanotoxin removal using both conventional and modified adsorbents. Given the different cyanotoxins removal capacities and cost of conventional and modified adsorbents, a future outlook, as well as suggestions are provided to achieve optimal cyanotoxin removal through adsorption.

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Section: Microcystin-lrmentioning

confidence: 99%

Recent Advancements in the Removal of Cyanotoxins from Water Using Conventional and Modified Adsorbents—A Contemporary Review

Abbas

Kajjumba

Ejjada

et al. 2020

Water

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“…From the appearance of the EOM and IOM extracts, the component structures of cyanobacteria EOM and IOM should be significantly different. Researches found that DOC and UV 254 values were the visual spectroscopic reflection of dissolved organic pollutants in water (Leloup et al 2013;Kong et al 2019). The SUVA value related to these two parameters was also often used to characterize the aromatic characteristics of organic compounds, which was positively correlated with the aromaticity of substances and the number of hydrophobic substances.…”

Section: Analysis Of Spectral Absorption Characteristics Of Cyanobacteria Aommentioning

confidence: 99%

Component structure and characteristic analysis of cyanobacterial organic matters

Sun

et al. 2022

Water Science and Technology

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The characteristic analysis of cyanobacterial organic matters is an important premise of cyanobacterial organic pollution control. This paper investigated the component structure characteristics of algal organic matters (AOM) secreted and released by cyanobacteria in laboratory culture and actual Taihu Lake environment by spectroscopic quantitative and qualitative methods. Results showed that the secretion amount of AOM was mainly 4–6 μg COD/106 cells during the growth period of Microcystis aeruginosa, and the content ratio of extracellular organic matters (EOM) to intracellular organic matters (IOM) gradually increased from 0.83 in adaptation and logarithmic period to 3.33 in stable and decay period. The secretion of IOM showed a decrease trend, which indicated the decrease of its synthesis or the gradual infiltration and loss caused by cell membrane damage. From the component characteristics, the EOM had lower SUVA value and higher proportion of small molecular substances with molecular weight <3 kDa, indicating its more difficult to separate from water than IOM. Compared with the laboratory culture environment, the actual Taihu Lake resulted in more obvious characteristic heterogeneity of cyanobacteria EOM and IOM.

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“…When the sound waves propagate in water, cavitation nucleus are formed inside the algae cells during the alternating process of the expansion and compression phases of the waves [17] , [18] , [19] . With sufficient ultrasonic density, the cavitation nucleus is compressed and exploded after multiple alternating cycles, destroying the gas vesicles in algae cells and interrupting photosynthetic activity [20] , [21] , [22] . Currently, a variety of ultrasonic algae removal devices have been developed and employed [23] , [24] , [25] .…”

Section: Introductionmentioning

confidence: 99%

Study on a novel omnidirectional ultrasonic cavitation removal system for Microcystis aeruginosa

Feng

Wang

et al. 2022

Ultrasonics Sonochemistry

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Removal of Microcystis aeruginosa by ultrasound: Inactivation mechanism and release of algal organic matter

Cited by 90 publications

References 42 publications

Recent Advancements in the Removal of Cyanotoxins from Water Using Conventional and Modified Adsorbents—A Contemporary Review

Recent Advancements in the Removal of Cyanotoxins from Water Using Conventional and Modified Adsorbents—A Contemporary Review

Component structure and characteristic analysis of cyanobacterial organic matters

Study on a novel omnidirectional ultrasonic cavitation removal system for Microcystis aeruginosa

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