Flocculation of bacteria by depletion interactions due to rod-shaped cellulose nanocrystals

Sun, Xiaohui; Danumah, Christophe; Liu, Yang; Boluk, Yaman

doi:10.1016/j.cej.2012.05.114

Cited by 55 publications

(39 citation statements)

References 25 publications

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“…14 [304]. For example, CNCs with responsive polymers have been demonstrated as flocculating agents [305][306][307] and emulsion stabilizers/breakers [308] and the potential for other water treatment technologies with CNCs has recently been reviewed [264]. Additionally, CNCs as supports for catalysts [309], antimicrobial agents [310], and metal and luminescent nanoparticles [311][312][313][314] is another quickly growing topic in the literature.…”

Section: Cnc Properties and Performancementioning

confidence: 99%

Nanocellulose as a natural source for groundbreaking applications in materials science: Today’s state

et al. 2018

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Nanocelluloses are natural materials with at least one dimension in the nano-scale. They combine important cellulose properties with the features of nanomaterials and open new horizons for materials science and its applications. The field of nanocellulose materials is subdivided into three domains: biotechnologically produced bacterial nanocellulose hydrogels, mechanically delaminated cellulose nanofibers, and hydrolytically extracted cellulose nanocrystals. This review article describes today's state regarding the production, structural details, physicochemical properties, and innovative applications of these nanocelluloses. Promising technical applications including gels/foams, thickeners/stabilizers as well as reinforcing agents have been proposed and research from last five years indicates new potential for groundbreaking innovations in the areas of cosmetic products, wound dressings, drug carriers, medical implants, tissue engineering, food and composites. The current state of worldwide commercialization and the challenge of reducing nanocellulose production costs are also discussed.

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Section: Cnc Properties and Performancementioning

confidence: 99%

Nanocellulose as a natural source for groundbreaking applications in materials science: Today’s state

et al. 2018

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“…Then 1−2 drops were put on a clean glass slide and smeared to a thin layer with a burned inoculating loop. The samples were naturally dried and measured by atomic force microscopy (AFM) in tapping mode within 3 days . Five to six photos of each sample, with the smear in different positions, were taken and 30−50 bacterial morphologies were observed on each smear.…”

Section: Methodsmentioning

confidence: 99%

Disinfection of municipal secondary effluents with microwave-induced electrodeless ultraviolet irradiation for water reuse

Zhang

Wang

et al. 2016

J. Chem. Technol. Biotechnol.

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BACKGROUND: Disinfection is an essential way to ensure the safety of recycled water. Ultraviolet (UV) is an effective and environmentally friendly technique suitable for the disinfection of recycled water. However, UV disinfection also leads to photoreactivation. This work proposes a combined use of UV irradiation and microwave technique to compensate for the limitations of UV disinfection. RESULTS: The process of microwave-induced electrodeless ultraviolet (MW-EUV) irradiation was utilized to disinfect municipal secondary effluents. A homemade columnar electrodeless UV lamp was used as the source of UV irradiation. Good disinfection results under optimal microwave power at 600 W were obtained. There was no photoreactivation after sufficient irradiation. Cell damage to Escherichia coli by MW-EUV irradiation was investigated by measuring the leakage of K + and protein from cells and was observed by atomic force microscopy (AFM).CONCLUSION: The MW-EUV irradiation was demonstrated to be a faster and more effective disinfection method than UV or microwave irradiation alone. The irradiated samples met the hygiene standard for the reuse of urban recycling water (Standard Number GB/T 18920-2002) in China. Disinfection depended mainly on UV irradiation, while microwaves were the main cause of bacterial breakup and deformation. This irreversible damage offsets the biological self-healing phenomenon of UV disinfection.

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“…Many studies have focused on the modification of the physical and chemical structure to improve nanocellulose properties. For instance, Sun et al [ 144 ] reported the effectiveness of applying CNCs to flocculate Gram negative bacteria ( Pseudomonas aeruginosa PAO1). The study found that the flocculation efficiency based on the depletion of bacteria depended on the shape of the cellulose colloidal particles.…”

Section: Reviewmentioning

confidence: 99%

Nanocellulose: Recent advances and its prospects in environmental remediation

Shak¹,

Pang²,

Mah³

2018

Beilstein J. Nanotechnol.

212

119

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Among many other sustainable functional nanomaterials, nanocellulose is drawing increasing interest for use in environmental remediation technologies due to its numerous unique properties and functionalities. Nanocellulose is usually derived from the disintegration of naturally occurring polymers or produced by the action of bacteria. In this review, some invigorating perspectives on the challenges, future direction, and updates on the most relevant uses of nanocellulose in environmental remediation are discussed. The reported applications and properties of nanocellulose as an adsorbent, photocatalyst, flocculant, and membrane are reviewed in particular. However, additional effort will be required to implement and commercialize nanocellulose as a viable nanomaterial for remediation technologies. In this regard, the main challenges and limitations in working with nanocellulose-based materials are identified in an effort to improve the development and efficient use of nanocellulose in environmental remediation.

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Flocculation of bacteria by depletion interactions due to rod-shaped cellulose nanocrystals

Cited by 55 publications

References 25 publications

Nanocellulose as a natural source for groundbreaking applications in materials science: Today’s state

Nanocellulose as a natural source for groundbreaking applications in materials science: Today’s state

Disinfection of municipal secondary effluents with microwave-induced electrodeless ultraviolet irradiation for water reuse

Nanocellulose: Recent advances and its prospects in environmental remediation

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