One-step removal of harmful algal blooms by dual-functional flocculant based on self-branched chitosan integrated with flotation function

Lin, Min-Zhao; Li, Weixiong; Hu, Ting; Bu, Huaitian; Li, Zeng-Lin; Wu, Tianfu; Wu, Xia-Xiao; Sun, Chao; Li, Yongtao; Jiang, Gang‐Biao

doi:10.1016/j.carbpol.2021.117710

Cited by 14 publications

(4 citation statements)

References 55 publications

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“…To overcome the drawbacks of settling flocculants (i.e., reliance on complex and expensive equipment for filtration and aeration devices required for flotation [ 95 ]), various novel flotation technologies have been developed to enable one-step removal of bloom-forming cyanobacteria. For example, Lin et al [ 96 ] utilized a novel flocculant (self-branched chitosan) integrated with flotation function (induced by CaO 2 @PEG) to develop a CP-SBC (CaO 2 @PEG-loaded water-soluble self-branched chitosan) system that removed multiple algae species from water in one step without additional instrumentation.…”

Section: Emerging Application Of Nanoparticles To Hcb Mitigationmentioning

confidence: 99%

Nanoparticles for Mitigation of Harmful Cyanobacterial Blooms

Tseytlin,

Antrim,

Gong

2024

Toxins

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With the rapid advancement of nanotechnology and its widespread applications, increasing amounts of manufactured and natural nanoparticles (NPs) have been tested for their potential utilization in treating harmful cyanobacterial blooms (HCBs). NPs can be used as a photocatalyst, algaecide, adsorbent, flocculant, or coagulant. The primary mechanisms explored for NPs to mitigate HCBs include photocatalysis, metal ion-induced cytotoxicity, physical disruption of the cell membrane, light-shielding, flocculation/coagulation/sedimentation of cyanobacterial cells, and the removal of phosphorus (P) and cyanotoxins from bloom water by adsorption. As an emerging and promising chemical/physical approach for HCB mitigation, versatile NP-based technologies offer great advantages, such as being environmentally benign, cost-effective, highly efficient, recyclable, and adaptable. The challenges we face include cost reduction, scalability, and impacts on non-target species co-inhabiting in the same environment. Further efforts are required to scale up to real-world operations through developing more efficient, recoverable, reusable, and deployable NP-based lattices or materials that are adaptable to bloom events in different water bodies of different sizes, such as reservoirs, lakes, rivers, and marine environments.

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Section: Emerging Application Of Nanoparticles To Hcb Mitigationmentioning

confidence: 99%

Nanoparticles for Mitigation of Harmful Cyanobacterial Blooms

Tseytlin,

Antrim,

Gong

2024

Toxins

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“…In addition, some nanomaterials can lower the density of flocs by generating small bubbles, causing them to float on the water surface. Lin et al developed a novel self-supporting chitosan dual-functional nanoparticle, CaO 2 @PEG-loaded, that can rapidly flocculate algae and naturally float flocs by continuously releasing oxygen [ 112 ]. Li et al conducted a study on the risk of algal toxin release within coagulation flocs.…”

Section: Nanoparticles To Control Habsmentioning

confidence: 99%

Nanoparticles, an Emerging Control Method for Harmful Algal Blooms: Current Technologies, Challenges, and Perspectives

Song,

Xu,

Chen

et al. 2023

Nanomaterials

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Harmful algal blooms (HABs) are a global concern because they harm aquatic ecosystems and pose a risk to human health. Various physical, chemical, and biological approaches have been explored to control HABs. However, these methods have limitations in terms of cost, environmental impact, and effectiveness, particularly for large water bodies. Recently, the use of nanoparticles has emerged as a promising strategy for controlling HABs. Briefly, nanoparticles can act as anti-algae agents via several mechanisms, including photocatalysis, flocculation, oxidation, adsorption, and nutrient recovery. Compared with traditional methods, nanoparticle-based approaches offer advantages in terms of environmental friendliness, effectiveness, and specificity. However, the challenges and risks associated with nanoparticles, such as their toxicity and ecological impact, must be considered. In this review, we summarize recent research progress concerning the use of nanoparticles to control HABs, compare the advantages and disadvantages of different types of nanoparticles, discuss the factors influencing their effectiveness and environmental impact, and suggest future directions for research and development in this field. Additionally, we explore the causes of algal blooms, their harmful effects, and various treatment methods, including restricting eutrophication, biological control, and disrupting living conditions. The potential of photocatalysis for generating reactive oxygen species and nutrient control methods using nanomaterials are also discussed in detail. Moreover, the application of flocculants/coagulants for algal removal is highlighted, along with the challenges and potential solutions associated with their use. This comprehensive overview aims to contribute to the development of efficient and sustainable strategies for controlling HAB control.

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“…It is usually filled with water at night, contingent on the availability of electricity and the water is distributed for irrigation during the day. The capacity of water to dissolve nutrients and support other forms of life in interaction with the sun's energy results in algae growth in the tank (Lin et al, 2021). The algae accumulate in the night storage tank with time, and every few years, it will block the outlet of the tank.…”

Section: Algae Managementmentioning

confidence: 99%

“…The villages are administered by the village head who assists the headman in administrative duties. These functionaries work in close association with the Chiefs to govern the people and administer the political will of the government, including influencing elections (Chigwata, 2016; Makumbe, 2010). The assumed direct association of chiefs – as well as headmen and village heads who serve him – to the supernatural realm reinforces the authority they receive through their appointed positions.…”

Section: Characterising Contemporary Moral Ecological Rationalities I...mentioning

confidence: 99%

‘Our humanism cannot be captured in the bylaws’: How moral ecological rationalities and care shape a smallholder irrigation scheme in Zimbabwe

Chitata

Kemerink-Seyoum

Cleaver

2022

Environment and Planning E: Nature and Space

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In this article, we bring concepts of institutional bricolage, moral ecological rationalities and care into engagement, to explain the everyday management of an irrigation scheme in Zimbabwe. In doing this we: (a) emphasise the constant processes of bricolage through which irrigators adapt to changing circumstances and dynamically enact irrigation management; (b) illustrate some of the key features of the contemporary, hybridised moral-ecological rationalities that shape these processes of bricolage; (c) show how motivations to care (for people, the environment and infrastructure) as well as to control shape the bricolaged management arrangements. Through this approach, we aim to contribute to expanding ways of thinking about rationalities, including those that express the aspiration to live well together with human and non-human others, including water and infrastructure. The focus on moral-ecological rationalities is central to our contribution to critical water studies. This sheds light on actual practices of governing water and relationships between society-water/people and the environment. In so doing it helps us to understand the possibilities of caring for natural resources.

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One-step removal of harmful algal blooms by dual-functional flocculant based on self-branched chitosan integrated with flotation function

Cited by 14 publications

References 55 publications

Nanoparticles for Mitigation of Harmful Cyanobacterial Blooms

Nanoparticles for Mitigation of Harmful Cyanobacterial Blooms

Nanoparticles, an Emerging Control Method for Harmful Algal Blooms: Current Technologies, Challenges, and Perspectives

‘Our humanism cannot be captured in the bylaws’: How moral ecological rationalities and care shape a smallholder irrigation scheme in Zimbabwe

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