Synthesis of magnetic sodium lignosulfonate hydrogel(Fe3O4@LS) and its adsorption behavior for Cd2+ in wastewater

Chen, Wu; Xie, Hao; Jiang, Nan; Guo, Xianzhe; Liu, Zhuozhuang

doi:10.1016/j.ijbiomac.2023.125498

Cited by 14 publications

(4 citation statements)

References 112 publications

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“…Therefore, the electrostatic repulsion between the Mn 3 O 4 –AL and Pb 2+ , Cu 2+ , Ni 2+ also resulted in a reduction of adsorption capacity. As the initial pH increased beyond the pH pzc , the surface charge of the Mn 3 O 4 –AL became negative [ 61 ]. Therefore, a stronger electrostatic attraction increases the adsorption capacity through electrostatic attraction [ 62 ].…”

Section: Resultsmentioning

confidence: 99%

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Resourcization of Argillaceous Limestone with Mn3O4 Modification for Efficient Adsorption of Lead, Copper, and Nickel

Li,

et al. 2024

Toxics

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Argillaceous limestone (AL) is comprised of carbonate minerals and clay minerals and is widely distributed throughout the Earth’s crust. However, owing to its low surface area and poorly active sites, AL has been largely neglected. Herein, manganic manganous oxide (Mn3O4) was used to modify AL by an in-situ deposition strategy through manganese chloride and alkali stepwise treatment to improve the surface area of AL and enable its utilization as an efficient adsorbent for heavy metals removal. The surface area and cation exchange capacity (CEC) were enhanced from 3.49 to 24.5 m2/g and 5.87 to 31.5 cmoL(+)/kg with modification, respectively. The maximum adsorption capacities of lead (Pb2+), copper (Cu2+), and nickel (Ni2+) ions on Mn3O4-modified argillaceous limestone (Mn3O4–AL) in mono-metal systems were 148.73, 41.30, and 60.87 mg/g, respectively. In addition, the adsorption selectivity in multi-metal systems was Pb2+ > Cu2+ > Ni2+ in order. The adsorption process conforms to the pseudo-second-order model. In the multi-metal system, the adsorption reaches equilibrium at about 360 min. The adsorption mechanisms may involve ion exchange, precipitation, electrostatic interaction, and complexation by hydroxyl groups. These results demonstrate that Mn3O4 modification realized argillaceous limestone resourcization as an ideal adsorbent. Mn3O4-modified argillaceous limestone was promising for heavy metal-polluted water and soil treatment.

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Section: Resultsmentioning

confidence: 99%

“…Therefore, a stronger electrostatic attraction increases the adsorption capacity through electrostatic attraction [ 62 ]. In addition, the surface functional groups of the adsorbent were protonated at low pH, which weakened the complexation between the adsorbent and the heavy metal ions [ 61 ].…”

Section: Resultsmentioning

confidence: 99%

Resourcization of Argillaceous Limestone with Mn3O4 Modification for Efficient Adsorption of Lead, Copper, and Nickel

Li,

et al. 2024

Toxics

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“…At the lower MB concentration, f 2 was 0.45, indicating a mixed kinetic process where the firstorder process dominates. The fitted parameters for 44.4 mg L −1 MB fit to a PFO model and 88 mg L −1 MB fit to PSO were used to estimate the initial sorption rate h 0 (mg g −1 min −1 ) according to the equation proposed by Ho: 26 = × h k q n e n 0 (15) where k n is the rate constant [min −1 (g mg −1 ) n−1 ], q e is the adsorbed MB at equilibrium (mg g −1 ), and n is the order of the kinetic model. For Ind, the calculated values were 1.53 ± 0.05 mg g −1 min −1 for the low concentration and 1.46 ± 0.09 mg g −1 min −1 for the high concentration, while for Ind-R the rate was found to be 1.87 ± 0.02 mg g −1 min −1 (only the high concentration tested).…”

Section: Kinetics and Equilibrium Study Of Mb Adsorptionmentioning

confidence: 99%

“…11 The modification of lignin impacts the adsorption of dyes, attributed to alterations in lignin's H-bonding capacity and the introduction of new adsorption sites. 12 Common modifications of lignin encompass its deposition onto inorganic substrates such as Si 13 and Fe 14,15 oxides, chemical alterations via the grafting of functional groups containing oxygen, nitrogen, or sulfur, 12 and pretreatments involving phenolation, demethylation, hydroxymethylation, reduction, or oxidation. 16 The efficiency of the adsorbent in removing contaminant species relies on interactions between the adsorbate and the functional groups of the adsorbent.…”

Section: Introductionmentioning

confidence: 99%

Unveiling the Nature of lignin’s Interaction with Molecules: A Mechanistic Understanding of Adsorption of Methylene Blue Dye

Tkachenko,

Diment,

Rigo

et al. 2024

Biomacromolecules

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The valorization of lignin into advanced materials for water and soil remediation is experiencing a surge in demand. However, it is imperative that material research and manufacturing be sustainable to prevent exacerbating environmental issues. Meeting these requirements necessitates a deeper understanding of the role of lignin's functional groups in attracting targeted species. This research delves into the interaction mechanisms between lignin and organic molecules, using the adsorption of the cationic dye Methylene Blue (MB + ) as a case study. Herein, we aim to quantitatively estimate the contribution of different interaction types to the overall adsorption process. While carbonyl groups were found to have no significant role in attraction, carboxylic groups (−COOH) exhibited significantly lower adsorption compared with hydroxyl groups (−OH). Through alternately blocking aliphatic and phenolic −OH groups, we determined that 61% of the adsorption occurred through hydrogen bonding and 38% via electrostatic interactions. Performance studies of modified lignin along with spectroscopic methods (XPS, FTIR) confirmed the negligible role of π−π interactions in adsorption. This study offers fundamental insights into the mechanistic aspects of MB adsorption on lignin, laying the groundwork for potential modifications to enhance the performance of lignin-based adsorbents. The findings underscore the importance of hydroxyl groups and provide a roadmap for future studies examining the influence of steric factors and interactions with other organic molecules.

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Two approaches to prepare cationic lignin‐based adsorbents for efficient removal of phosphate ion from wastewater

Zhang,

Sun,

et al. 2024

J of Applied Polymer Sci

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In this work, two types of cationic lignin‐based adsorbents (AL‐METAC and AL‐GTA) were prepared through free radical polymerization or etherification reaction of alkali lignin with 2,3‐epoxypropyl‐3‐trimethylammonium chloride or methylacrylloxyethyl trimethyl ammonium chloride (METAC). The contents of quaternary ammonium groups in the adsorbents were adjusted by changing the dosages of 2,3‐epoxypropyl‐3‐trimethylammonium chloride and METAC to fabricate the adsorbents with excellent adsorption capacity. The structures, aqueous solubility, and physical properties of adsorbents were analyzed. Meanwhile, the effects of adsorbents dosage, pH value of solution, temperature, and ionic strength on the adsorption capacity of adsorbents were also analyzed. These two types of adsorbents exhibited outstanding affinity for phosphate, with a maximum removal efficiency of 51.8 and 73.2 mg/g, respectively. The adsorption processes followed pseudo‐second‐order and Langmuir models well. In addition, the AL‐GTA exhibited higher removal efficiency than AL‐METAC. Moreover, the AL‐METAC and AL‐GTA still retained 69.7% and 69.0% adsorption capacity after four times regeneration. The fabricated lignin‐based adsorbents have potential applications in the removal of phosphate from wastewater, which would promote the high‐value application of lignin.

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Synthesis of magnetic sodium lignosulfonate hydrogel(Fe3O4@LS) and its adsorption behavior for Cd2+ in wastewater

Cited by 14 publications

References 112 publications

Resourcization of Argillaceous Limestone with Mn3O4 Modification for Efficient Adsorption of Lead, Copper, and Nickel

Resourcization of Argillaceous Limestone with Mn3O4 Modification for Efficient Adsorption of Lead, Copper, and Nickel

Unveiling the Nature of lignin’s Interaction with Molecules: A Mechanistic Understanding of Adsorption of Methylene Blue Dye

Two approaches to prepare cationic lignin‐based adsorbents for efficient removal of phosphate ion from wastewater

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