Dual nanofibrillar-based bio-sorbent films composed of nanocellulose and lysozyme nanofibrils for mercury removal from spring waters

Silva, Nuno H.C.S.; Figueira, Paula; Fabre, Elaine; Pinto, Ricardo J.B.; Pereira, Manuela; Silvestre, Armando J. D.; Marrucho, Isabel M.; Vilela, Carla; Freire, Carmen S.R.

doi:10.1016/j.carbpol.2020.116210

Cited by 38 publications

(35 citation statements)

References 37 publications

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“…At the end of the analysis, the remaining CNF/PVA aerogel and CNF/PVA/PEI nanoparticle were 31% and 16%, respectively. The thermal stability of the adsorbents up to 205°C can be a valuable asset in the industrial sector context where the e uents can be warm or hot (Silva et al 2020).…”

Section: Resultsmentioning

confidence: 99%

Novel Cellulose Nanofibers/Polyvinyl Alcohol/Polyethyleneimine Nanoparticle for Cu2+ Removal in Water

et al. 2021

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In this study, environmentally friendly CNF/PVA/PEI nanoparticle was obtained by assembling PEI (polyethyleneimine) into CNF/PVA aerogels, which were prepared by freeze-drying method with the help of glutaraldehyde. FTIR results showed that PEI likely assembled into the CNF/PVA aerogel due to appearances of bending vibration of the CNF/PVA/PEI nanoparticle at 1615cm− 1. BET results further demonstrated that PEI have successfully assembled into aerogel since the specific surface area (22.93m2/g) of CNF/PVA/PEI nanoparticle was lower than that (56.37m2/g) of CNF/PVA aerogel. SEM results also showed that PEI could obviously regulate the morphology of CNF/PVA aerogel. TGA indicated that CNF/PVA/PEI nanoparticle was structurally stable at 216.4°C. The adsorption kinetics of the CNF/PVA/PEI nanoparticle for Cu2+ removal presented good correlations with the Pseudo-second-order model. The adsorption and desorption results showed that the removal rate of 2g/L CNF/PVA/PEI nanoparticle for Cu2+in water could reach more than 93% when the concentration of Cu2+ ranged from 20 to 80mg/L in one hour, and it could still retain more than 80% after 3 cycles.

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Section: Resultsmentioning

confidence: 99%

Novel Cellulose Nanofibers/Polyvinyl Alcohol/Polyethyleneimine Nanoparticle for Cu2+ Removal in Water

et al. 2021

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“…The obtained freestanding films were flexible and easy to manipulate. The Hg(II) removal efficiency of cellulose/nanofibrils hybrid films, after adding the lysozyme nanofibrils, improved from 35% to above 80%, indicating the high propensity of protein fibrils for adsorbing Hg(II) ions 45 . Furthermore, gold, mercury, lead, and palladium removal efficiencies above 90% were achieved by hybrid membranes composed of lysozyme amyloid fibrils and activated carbon 8 .…”

Section: Protein Nanofibrils As New Water Purification Agentsmentioning

confidence: 99%

“…Lysozyme plays a key role as a food preservative, by reducing the food products deterioration by maintaining the quality and extending the shelf life of foods 40 . Lysozyme amyloid nanofibrils have been widely used for dyes and heavy metals removal from water, due to their high binding affinity and stability 27,[43][44][45] .…”

Section: Protein Nanofibrils As New Water Purification Agentsmentioning

confidence: 99%

“…Cellulose and carbon are the most used matrixes for fabricating lysozyme nanofibrils films and membranes, exploiting their high binding tendency with heavy metals. For instance, dual nanofibrillar-based bio-sorbent films composed of lysozyme and cellulose nanofibrils were fabricated and used for the removal of Hg(II) from water 45 . The obtained freestanding films were flexible and easy to manipulate.…”

Section: Protein Nanofibrils As New Water Purification Agentsmentioning

confidence: 99%

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Protein nanofibrils for next generation sustainable water purification

2021

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Water scarcity is rapidly spreading across the planet, threatening the population across the five continents and calling for global sustainable solutions. Water reclamation is the most ecological approach for supplying clean drinking water. However, current water purification technologies are seldom sustainable, due to high-energy consumption and negative environmental footprint. Here, we review the cutting-edge technologies based on protein nanofibrils as water purification agents and we highlight the benefits of this green, efficient and affordable solution to alleviate the global water crisis. We discuss the different protein nanofibrils agents available and analyze them in terms of performance, range of applicability and sustainability. We underline the unique opportunity of designing protein nanofibrils for efficient water purification starting from food waste, as well as cattle, agricultural or dairy industry byproducts, allowing simultaneous environmental, economic and social benefits and we present a case analysis, including a detailed life cycle assessment, to establish their sustainable footprint against other common natural-based adsorbents, anticipating a bright future for this water purification approach.

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“…Compared with 197m 2 /g for NC, the speci c surface area of NCPY was signi cantly increased (488m 2 /g). The maximum adsorption capacity of NCPPY for Cr 6+ was 147.3mg/g possibly duo to the -OH and -NH 2 adsorption sites on its surface.3.4 Nanocellulose based adsorbents for Hg 2+ removalSilva et al (2020). dissolved lysozyme protein extracted from egg white in a solution containing 20 mmol/L glutamic acid and 5% (V/V) DES (choline chloride/acetic acid) to obtain lysozyme nano brils (LNFs)(Silva et al 2018),and then mixed with different proportions of CNFs to obtain dual-nano brillar lms (CNFs/LNFs).…”

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confidence: 97%

Nanocelllulose Based Adsorbents for Heavy Metal Ions Removal

Wang

Chen

et al. 2021

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Heavy metal ion pollutions are of serious threat for our human health, and advanced technologies on removal of heavy metal ions in water or soil are in the focus of intensive research worldwide. Nanocellulose based adsorbents are emerging as an environmentally friendly appealing materials platform for heavy metal ions removal as nanocellulose has higher specific surface area, excellent mechanical properties and good biocompatibility. In this review, we briefly compare the differences of three kinds of nanocellulose and their preparation method. Then we cover the most recent work on nanocellulose based adsorbents for heavy metal ions removal, and present an in-depth discussion of the modification technologies for nanocellulose in assembling high performance heavy ions adsorbent process. By introducing functional groups, such as amino, carboxyl, phenolic hydroxyl, and thiol, the nanocellulose based adsorbents not only remove single heavy metal ions through ion exchange, chelation/complexation/coordination, electrostatic attraction, hydrophobic actions, binding affinity and redox reactions, but also can selectively adsorb multiple heavy ions in water. Finally, some challenges of nanocellulose based adsorbents for heavy metal ions are also prospected. We anticipate that the review supplies some guides for nanocellulose based adsorbents applied in heavy metal ions removal field.

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Dual nanofibrillar-based bio-sorbent films composed of nanocellulose and lysozyme nanofibrils for mercury removal from spring waters

Cited by 38 publications

References 37 publications

Novel Cellulose Nanofibers/Polyvinyl Alcohol/Polyethyleneimine Nanoparticle for Cu2+ Removal in Water

Novel Cellulose Nanofibers/Polyvinyl Alcohol/Polyethyleneimine Nanoparticle for Cu2+ Removal in Water

Protein nanofibrils for next generation sustainable water purification

Nanocelllulose Based Adsorbents for Heavy Metal Ions Removal

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