Amino-functionalization of lignocellulosic biopolymer to be used as a green and sustainable adsorbent for anionic contaminant removal

Mei, Meng; Du, Peiyu; Li, Weilin; Xu, Lei; Wang, Teng; Liu, Jingxin; Chen, Si; Li, Jinping

doi:10.1016/j.ijbiomac.2022.11.322

Cited by 11 publications

(3 citation statements)

References 57 publications

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“…Water quality issues are a major challenge in promoting sustainable development worldwide [ 1 , 2 ]. Eutrophication is an increasingly global problem that can cause several adverse environmental impacts, such as anoxia and death of aquatic animals.…”

Section: Introductionmentioning

confidence: 99%

“…Among these, the adsorption process is considered to be the most promising choice due to its simple operation, convenient recyclability and high reliability. In recent years, biomass-derived adsorbents have attracted increasing attention in the field of pollution removal because of their sustainable resources, biocompatibility and low environmental impact [ 1 , 4 ]. In addition, abundant reactive groups on the surfaces of biomass enable functionalization, thereby enhancing the adsorption capacity towards target pollutants [ 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

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A Recyclable Magnetic Aminated Lignin Supported Zr-La Dual-Metal Hydroxide for Rapid Separation and Highly Efficient Sequestration of Phosphate

et al. 2023

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The application of lignin-based adsorbents in the efficient removal of phosphate from wastewater has attracted much attention and been intensively studied in recent years. However, most currently reported lignin-based adsorbents are difficult to recover and recycle. Herein, we have developed a recyclable, nanostructured bio-adsorbent, poly(ethyleneimine) (PEI)-modified lignin (LG) integrated with Fe3O4 and Zr-La dual-metal hydroxide (LG-NH2@Fe3O4@Zr-La), by the Mannich reaction followed by the chemical coprecipitation method. Multilayer adsorption existed on the surface of LG-NH2@Fe3O4@Zr-La based on the isotherm fitting curve, and its adsorption capacity reached 57.8 mg P g−1, exhibiting a higher phosphate uptake than most reported metallic oxide-based composites. The adsorption process was dominated by inner-sphere complexation of ligand-exchange and electrostatic interactions. Moreover, LG-NH2@Fe3O4@Zr-La exhibited excellent selectivity against coexisting anions, and the adsorption was more efficient under acidic conditions. When the phosphate concentration was 2.0 mg P L−1, the removal efficiency of phosphate reached 99.5% and the residual concentration was only 10 μg P L−1, which meets the United States Environmental Protection Agency (USEPA) standard for eutrophication prevention. In addition, the LG-NH2@Fe3O4@Zr-La displayed excellent reusability, maintaining 91.8% of removal efficiency after five cycles. Importantly, owing to the magnetic properties of the loaded Fe3O4, the resulting composite could be separated within 30 s under an external magnetic field. Thus, the separable and recyclable biobased magnetic adsorbent developed in this work exhibited promising application in phosphate capture from real sewage. This research study provides a new perspective for lignin valorization in lignocellulose biorefineries and establishes an approach for developing an economical and efficient bio-adsorbent for phosphate removal from wastewater.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Recyclable Magnetic Aminated Lignin Supported Zr-La Dual-Metal Hydroxide for Rapid Separation and Highly Efficient Sequestration of Phosphate

et al. 2023

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“…As mentioned above, flavonoids have somewhat weak acidity owing to phenol hydroxyls. Therefore, simultaneously grafting the hydrophobic groups and hydrophilic alkali groups like -NH 2 on collagen fiber may be conducive to the formation of hydrophobic interaction, hydrogen bonding [22] and electrostatic association [23,24], and is considered as a more efficient strategy to improve the adsorption and separation effects for flavonoid aglycones. In addition, electrostatic interaction is a kind of long range force [25,26] and is expected to improve both the adsorption strength and adsorption rate.…”

Section: Introductionmentioning

confidence: 99%

Synergistically enhancing hydrogen bonding, hydrophobic interaction and electrostatic association of collagen fiber to flavonoid aglycones for their effective separation by polyethyleneimine modification

Zhang,

Wang,

Shi

2023

Collagen & Leather

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Compared with flavonoid glycosides, flavonoid aglycones are difficult to be separated since they have less hydroxyls. Collagen fiber (CF), a natural polymer, was once used as packing material for separation of kaempferol and quercetin (the typical flavonoid aglycones) after crosslinking by glutaraldehyde mainly based on hydrogen bonding and hydrophobic interaction in column length-diameter ratio of 60:1. Hydrophobic modification by grafting alkyl chains was then employed to enhance the hydrophobic interaction between CF and flavonoid aglycones, which can improve the separation efficiency and decrease column length-diameter ratio to 19:1. In order to further improve the adsorption capacity and separation efficiency, the strategy of simultaneously grafting hydrophobic alkyl chains (–CH2–CH2–) and alkali groups (–NH2) was adopted in this work to enhance hydrophobic interaction, hydrogen bonding and electrostatic association to flavonoid aglycones at the same time through grafting polyethyleneimine (PEI). PEI modified CF (PEI-CF) maintained the fiber structure of CF, and had higher adsorption extent and rate to flavonoid aglycones through the enhanced synergetic effect of hydrophobic interaction, hydrogen bonding and electrostatic association. As a result, PEI-CF presented a satisfactory column separation efficiency for kaempferol and quercetin even the length-diameter ratio of column was decreased to 11:1, which was much better than previously developed glutaradehyde-crosslinked collagen fiber and isobutyl-grafted collagen fiber, as well as commonly used polyamide and Sephadex LH-20. Graphical abstract

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An ingenious investigation on the adsorptive and antibacterial properties of a novel silver-doped hydrochar

Suhas,

Chaudhary,

Chaudhary

et al. 2024

Int. J. Environ. Sci. Technol.

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Amino-functionalization of lignocellulosic biopolymer to be used as a green and sustainable adsorbent for anionic contaminant removal

Cited by 11 publications

References 57 publications

A Recyclable Magnetic Aminated Lignin Supported Zr-La Dual-Metal Hydroxide for Rapid Separation and Highly Efficient Sequestration of Phosphate

A Recyclable Magnetic Aminated Lignin Supported Zr-La Dual-Metal Hydroxide for Rapid Separation and Highly Efficient Sequestration of Phosphate

Synergistically enhancing hydrogen bonding, hydrophobic interaction and electrostatic association of collagen fiber to flavonoid aglycones for their effective separation by polyethyleneimine modification

An ingenious investigation on the adsorptive and antibacterial properties of a novel silver-doped hydrochar

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