Aldehyde-functionalized porous nanocellulose for effective removal of heavy metal ions from aqueous solutions

Yao, Chunhua; Wang, F.; Cai, Zhiyong; Wang, X.

doi:10.1039/c6ra20598d

Cited by 44 publications

(18 citation statements)

References 40 publications

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“…e values exceed those reported previously [28][29][30][31][32][33][34]. e maximum adsorption capacity of Cr(VI) by the quaternary ammonium-modified NFC cryogel was 18 mg/g, showing 16% removal rate increase compared with nonmodified NFC cryogels [28].…”

Section: Advances In Polymer Technologycontrasting

confidence: 43%

“…Figure 4: TEM images of the MMFC cryogel and filter paper/MFC film with MNPs (note that the filter paper was treated three times for iron coprecipitation). Advances in Polymer Technology Aldehyde-functionalized NFC cryogels showed an improved Pb(II) adsorption of 156 mg/g [32]. Chitosan-based magnetic hydrogel beads reached 171 mg/g Pd 2+ adsorption capacity with Fe 2 O 3 and NFC addition, but only 118 mg/g with no addition [33].…”

Section: Advances In Polymer Technologymentioning

confidence: 99%

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Loading of Iron (II, III) Oxide Nanoparticles in Cryogels Based on Microfibrillar Cellulose for Heavy Metal Ion Separation

Jin¹,

Yang²,

Silva

et al. 2020

Advances in Polymer Technology

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Cryogels based on microfibrillar cellulose (MFC) and reinforced with chitosan to endow water resistance were loaded with magnetite nanoparticles (MNPs) and characterized by TEM, XRD, and TGA. e MNP-loaded cryogels were tested for heavy metal ion removal from aqueous matrices. e adsorption capacity under equilibrium conditions for Cr(VI), Pd(II), Cd(II), and Zn(II) was measured to be 2755, 2155, 3015, and 4100 mg/g, respectively. e results indicate the potential of the introduced bicomponent cryogels for nanoparticle loading, leading to a remarkably high metal ion sorption capacity.

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Section: Advances In Polymer Technologycontrasting

confidence: 43%

Section: Advances In Polymer Technologymentioning

confidence: 99%

Loading of Iron (II, III) Oxide Nanoparticles in Cryogels Based on Microfibrillar Cellulose for Heavy Metal Ion Separation

Jin¹,

Yang²,

Silva

et al. 2020

Advances in Polymer Technology

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“…Besides, each cation can interact with a single molecule of Cr VI, forming a monolayer as a consequence (Giles et al1974). However, results also show a high adjustment to the Freundlich isotherm, which means that multilayer adsorption also occurs (Yao, 2016).…”

Section: Analysis Of Adsorption Isothermsmentioning

confidence: 90%

Remediation of contaminated water with Chromium VI by sorption in surface-activated-nanocellulose

Renata¹,

Bernardo²,

Patricia³

et al. 2021

Preprint

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Chromium VI is a frequent pollutant of industrial liquid effluents resulting from industrial waste. It is a substance classified into the carcinogen group I. In this study, a Cr VI sorption mechanism was developed by using nanocellulose beads (hydrogel) obtained from ivory nut. Cr VI was detected in water by a colorimetric method, using 1, 5-diphenylcarbazide at λ 540 nm. The sorption capacity of nanocellulose spheres was tested by varying the solution's pH and temperatures. Our results showed that nanocellulose can efficiently adsorb at pH 4 and 25°C. Removal percentages were between 91.29%(+/-1.36) and 95.33%(+/- 0.86) of the total Cr VI. The sorption kinetics showed that the material reaches equilibrium after 20–30 minutes. Additionally, an analysis of adsorption isotherms showed a high fit with the Langmuir and Freundlinch isotherms. Therefore, this method seem to be applied both to decontaminate industrial and drinking water employing an organic matrix such as nanocelullose beads.

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“…Yao et al. have attached aldehyde functional groups to the NC fiber surface and they have removed Cu(II) and Pb(II) from aqueous solution with a removal capacity of 0.75 mmol g −1 for Pb(II) and 0.58 mmol g −1 for Cu(II) . Sheikhi et al.…”

Section: Functionalizing Cellulosementioning

confidence: 99%

Functionalized Cellulose for Water Purification, Antimicrobial Applications, and Sensors

Bethke

Palantöken

Andrei

et al. 2018

Adv Funct Materials

217

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As the most abundant natural polymer, cellulose presents a unique advantage for large-scale applications. To fully unlock its potential, the introduction of desired functional groups onto the cellulose backbone is required, which can be realized by either chemical bonding or physical surface interactions. This review gives an overview of the chemistry behind the state-of-the-art functionalization methods (e.g., oxidation, esterification, grafting) for cellulose in its various forms, from nanocrystals to bacterial cellulose. The existing and foreseeable applications of the obtained products are presented in detail, spanning from water purification and antibacterial action, to sensing, energy harvesting, and catalysis. A special emphasis is put on the interactions of functionalized cellulose with heavy metals, focusing on copper as a prime example. For the latter, its toxicity can either have a harmful influence on aquatic life, or it can be conveniently employed for microbial disinfection. The reader is further introduced to recent sensing technologies based on functionalized cellulose, which are becoming crucial for the near future especially with the emergence of the internet of things. By revealing the potential of water filters and conductive clothing for mass implementation, the near future of cellulose-based technologies is also discussed.not suitable for drinking water treatment in rural areas or not applicable on a large scale. Other methods involving materials which have high adsorption capacities for pollutants, for example activated charcoal have been explored. [27,28] Nevertheless, there are no universal adsorbents for all pollutants, meaning that superior alternatives are still required. In recent years, biodegradable adsorbents such as cellulose and chitosan have attracted much attention for the removal of heavy metals.In particular cellulose has a number of advantages, which include high abundance, low cost, easy access, nontoxicity and biodegradability. It is particularly suited for the removal of low concentrations of heavy metals which occur in contaminated ground or tap water. [26] Beyond the aspects of copper removal from water, in this review we indicate how the metal's increased toxicity for microbial life can present an advantage for medical applications. Moreover, we also take a closer look at further applications of functionalized cellulose, including catalysis and sensing, which can make a great impact regarding energy conversion and management. The inclusion of conductive cellulose sensors within the internet of things global network is of particular interest, since an accurate weather forecast can provide swift adjustments in the usage of the often intermittent renewable energy sources. In order to understand what confers functionalized cellulose its versatility for broad applications, we first exemplify the functionalization techniques on a molecular basis.

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Aldehyde-functionalized porous nanocellulose for effective removal of heavy metal ions from aqueous solutions

Abstract: Nanoscale sorption is a promising strategy for catalyst and purification system design.

Cited by 44 publications

References 40 publications

Loading of Iron (II, III) Oxide Nanoparticles in Cryogels Based on Microfibrillar Cellulose for Heavy Metal Ion Separation

Loading of Iron (II, III) Oxide Nanoparticles in Cryogels Based on Microfibrillar Cellulose for Heavy Metal Ion Separation

Remediation of contaminated water with Chromium VI by sorption in surface-activated-nanocellulose

Functionalized Cellulose for Water Purification, Antimicrobial Applications, and Sensors

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