Harvesting of Chlorella vulgaris using Fe3O4 coated with modified plant polyphenol

Zhao, Yuan; Wang, Xiaoyu; Jiang, Xiaoxue; Fan, Qianlong; Li, Xue; Jiao, Liyang; Liang, Wenyan

doi:10.1007/s11356-018-2677-8

Cited by 22 publications

(9 citation statements)

References 64 publications

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“…The elevated isoelectric point also means that more ion exchange occurs between nano-Fe 3 O 4 and the coated polymer, which results in magnetic composites with more functional groups. This significantly broadens the applicability of nano-Fe 3 O 4 [56][57][58].…”

Section: Nano-fe 3 O 4 Particle Preparationmentioning

confidence: 96%

Preparation and Application of Magnetic Composites Using Controllable Assembly for Use in Water Treatment: A Review

Zhao,

Liu,

et al. 2023

Molecules

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The use of magnetic composites in wastewater treatment has become widespread due to their high flocculating characteristics and ferromagnetism. This review provides an analysis and summary of the preparation and application of magnetic composites through controllable assembly for use in wastewater treatment. The applications of magnetic composites include the treatment of dye wastewater, heavy metal wastewater, microalgae suspensions, and oily wastewater. Additionally, the recycling and regeneration of magnetic composites have been investigated. In the future, further research could be focused on improving the assembly and regeneration stability of magnetic composites, such as utilizing polymers with a multibranched structure. Additionally, it would be beneficial to explore the recycling and regeneration properties of these composites.

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Section: Nano-fe 3 O 4 Particle Preparationmentioning

confidence: 96%

Preparation and Application of Magnetic Composites Using Controllable Assembly for Use in Water Treatment: A Review

Zhao,

Liu,

et al. 2023

Molecules

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“…The effective detachment of the magnetic particles from the Fe3O4@Q-PP-cell aggregates was reached by ultrasounds application and more than 96 % of magnetit was recovered. The recycled Fe3O4@Q-PP also achieved a high harvesting efficiency of the microalgae cells (76 % harvesting efficiency at the tenth cycle) [51].…”

Section: Nanoparticles + Plant Polyphenol (Pp)mentioning

confidence: 96%

Microalgae Harvesting: A Review

Kucmanová

Gerulová

2019

Research Papers Faculty of Materials Science and Technology Slovak University of Technology

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Microalgae are photosynthetic autotrophic microscopic organisms growing in a range of aquatic and terrestrial habitats. They produce a huge complex of compounds in their surroundings which are of important use to humans. Their commercial use lies in human nutrition, animal and aquatic feed, in cosmetics products, natural pigments, pharmaceutical industry, bio-fertilizer for extracting high-value molecules, stable isotope biochemicals, and for the synthesis of antimicrobial, antiviral, antibacterial and anticancer drugs. Therefore, it is necessary to develop a simple, effective and economically advantageous method for harvesting the algal products. Magnetic separation is a simple separation process. Different synthesis methods have been used by researchers to obtain magnetic particles of varying size and shapes according to the algae to be studied. Chemical co-precipitation method has been the most commonly used method, which helps in synthesizing magnetic particles of the micro to nano range. Naked, coated and surface modified are the general types of magnetic particles used for algal harvesting with its own advantages and disadvantages.

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“…Magnetite (Fe 3 O 4 ) nanoparticles (MNPs) have been recently tested as a reusable means to capture microalgae from bulk algal suspensions (Figure 2C). MNPs have generally been applied for capturing Botryococcus braunii , [ 39 ] Microcystis aeruginosa , [ 40 ] Chlorella , [ 39,41,42 ] Nannochloropsis , [ 43,44 ] Scenedesmus , [ 41,42,45 ] and Chlamydomonas spp. [ 46 ] These particles, about 12 nm in size, attach to microalgae and allow for harvesting the algae–nanoparticle aggregate with magnets.…”

Section: Harvesting Microalgaementioning

confidence: 99%

“…MNPs can be functionalized to improve properties including stability and harvesting efficiency, [ 45 ] typically by improving MNPs’ adherence to negatively charged algal cells via electrostatic attraction with a positively charged coating material. [ 47 ] Coatings including cationic polyacrylamide (CPAM), [ 39,46 ] polyethyleneimine (PEI), [ 40,41 ] and plant polyphenols [ 42 ] were able to produce harvesting efficiencies of >95% for B. braunii (1.8 g algal dry weight L −1 ), Chlorella ellipsoidea (0.7 g L −1 ), and Chlamydomonas sp. (1.2–1.5 × 10 7 cells mL −1 ), 98.45% ± 0.35% for Chlorella pyrenoidosa (0.5 g L −1 ) and 97.5% for M. aeruginosa (1.5 × 10 6 cells mL −1 ), and 90.9% of Chorella vulgaris (3.06 g L −1 ), respectively.…”

Section: Harvesting Microalgaementioning

confidence: 99%

“…The nanoparticles can be cleaned by increasing the pH and rinsing [ 45,49 ] and/or ultrasonication [ 42,45 ] followed by recoating [ 42 ] if needed. In the examined studies, harvesting efficiencies of reused particles remained high, from 90.9% to 80.2% after 10 cycles [ 42 ] and 90% to 84.1% after five cycles. [ 45 ] MNPs can be cost‐effective, at an estimated US $347 ton −1 of harvested algae, even without reuse and at a 1:1 ratio of biomass to MNP mass.…”

Section: Harvesting Microalgaementioning

confidence: 99%

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Harvesting Microalgae for Food and Energy Products

et al. 2020

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their size and physiology, and they belong to many different phylogenetic groups that are distinct from plants. [1] Microalgae are the subset of algae that are unicellular and range in size from several to a few hundred micrometers. Most microalgae diversity resides in freshwater or marine systems. Microalgae can grow in extreme environments such as deserts and polar regions, [2] and often show greater efficiency in synthesizing bioproducts compared to land plants. [3] Moreover, algae produce oxygen and sequester the greenhouse gas carbon dioxide at globally relevant scales, [4] and account for half of the oceans' net primary production. [5] They grow fast and can produce high-value biomass. [6] While microalgae are phylogenetically diverse, most biotechnology interest applies to the green algae (Chlorophyceae), diatoms (Bacillariophyceae), blue-green algae (Cyanobacteria), and Eustigmatophyceae (including Nannochloropsis), which are well-characterized species for valuable bioproducts. 1.2. Microalgae as Sustainable Biofactories Microalgae have the potential to produce large amounts of valuable products sustainably, since they do not require arable land and can be produced using seawater, wastewater, or brackish water. Reduction in environmental impacts of fuels and food products will be important for the mitigation of climate change. [7] Microalgae are also being used in powerplants as a means to capture carbon dioxide and sequester it into biomass, which may provide opportunities for large-scale production of carbon-neutral energy and products. [8] Vaccines and other pharmaceutical proteins are among the most high-value products that microalgae are used to produce, as well as effectively store and orally administer those products. [9] Other high-value products derived from microalgae include cosmetics, [10] food supplements and additives, [11] cooking oils, [12] and animal feed. [13,14] These have been developed as potentially more sustainable alternatives to synthetic or animal-derived products. Microalgae also provide feedstocks for biodiesel [15] and ethanol, [16] contributing to renewable and sustainable energy resource developments that may displace fossil fuels and food-derived fuels. Genetic and synthetic biology approaches can accelerate the development of microalgae strains capable of producing novel specialty products [17-19] or producing conventional products with improved lipid content, [20] growth rate, and production efficiency. [21,22] Unlike field-grown transgenic crops, multi ple Microalgae are promising biological factories for diverse natural products. Microalgae tout high productivity, and their biomass has value in industrial products ranging from biofuels, feedstocks, food additives, cosmetics, pharmaceuticals, and as alternatives to synthetic or animal-derived products. However, harvesting microalgae to extract bioproducts is challenging given their small size and suspension in liquid growth media. In response, technologic developments have relied upon mechanical, chemical, thermal, and b...

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Harvesting of Chlorella vulgaris using Fe3O4 coated with modified plant polyphenol

Cited by 22 publications

References 64 publications

Preparation and Application of Magnetic Composites Using Controllable Assembly for Use in Water Treatment: A Review

Preparation and Application of Magnetic Composites Using Controllable Assembly for Use in Water Treatment: A Review

Microalgae Harvesting: A Review

Harvesting Microalgae for Food and Energy Products

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