A novel nitrogen-doped porous carbon derived from black liquor for efficient removal of Cr(VI) and tetracycline: Comparison with lignin porous carbon

Tian, Yuxin; Zhou, Haifeng

doi:10.1016/j.jclepro.2021.130106

Cited by 57 publications

(24 citation statements)

References 67 publications

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“…Meanwhile, the as-synthesized M-MCM-41 has the characteristics of type IV isotherm with a tiny hysteresis loop owing to the capillary condensation in the relative pressure region of 0.3 ∼ 0.9, which ChemistrySelect demonstrate the existence of mesopores in M-MCM-41. [53,54,55] The mesopores can provide larger pores for M-MCM-41, which is conducive to the adsorption of adsorbates, especially for the macromolecular pollutants. The pore size distribution diagram of the M-MCM-41 in Figure5b shows that the average diameter of micropores and mesopores are 0.7-2 nm and 2-4.5 nm, respectively.…”

Section: Resultsmentioning

confidence: 99%

Fly‐Ash‐Based Hierarchical MCM‐41 Molecular Sieve as an Efficient Adsorbent for Methylene Blue Removal from Wastewater over a Wide pH

et al. 2022

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The development of cost-effective adsorbents with high sorption capacity and excellent renewability over a wide range of pH is essential for removal of toxic methylene blue (MB) from wastewater. The micro-mesoporous MCM-41 molecular sieve (M-MCM-41) was prepared by coal fly ash (CFA). The low temperature N 2 physical adsorption reveals that the prepared M-MCM-41 has hierarchically micro-mesoporous structure with high surface area (909.5 m 2 ⋅g À 1 ). As a result, M-MCM-41 possesses superior adsorption presentation towards MB with prominently high sorption capacity of 574.7 mg⋅g À 1 , and rapid sorption rate of 0.29 g⋅mg À 1 ⋅h À 1 (13 fold that of CFA). Surprisingly, 95 % of the incipient adsorption capacity remains well after five cycles. More importantly, the M-MCM-41 maintains almost the same maximum sorption capacity in the pH range of 5-9, which is close to the wastewater discharge standard (6 ∼ 9) without excessive pH adjustment. The adsorption kinetics and equilibrium data fit well with pseudo-secondorder model and the Langmuir isotherm model, respectively. And the thermodynamic investigations show that the adsorption behavior is spontaneous and exothermic. The M-MCM-41 has well-defined micro-mesoporous porosity and could be used as an effective adsorbent to remove MB from wastewater. This work provides a new sight for the solid waste resource utilization, which is beneficial to the development of recycling economy.

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Section: Resultsmentioning

confidence: 99%

Fly‐Ash‐Based Hierarchical MCM‐41 Molecular Sieve as an Efficient Adsorbent for Methylene Blue Removal from Wastewater over a Wide pH

et al. 2022

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“…However, these materials are generally produced from non-renewable resources through multiple steps, thereby increasing their final cost. Therefore, cost-effective carbonaceous materials derived from black liquor have been used for electromagnetic wave absorption 13,14 , as an electrocatalyst support for fuel cells 3 , for adsorption of heavy metals [15][16][17] and antibiotics 15 , in electrical systems 18 , and for energy storage 19 .…”

Section: Introductionmentioning

confidence: 99%

Bio-based Carbon Electrochemically Decorated with Cu Nanoparticles: Green Synthesis and Electrochemical Performance

Fonseca¹,

Araujo²,

Pinheiro³

et al. 2022

Mat. Res.

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This study aimed to synthesize a composite material composed of bio-based, porous carbon matrix and Cu nanoparticles through a simple, low-cost, and environmentally friendly method. Concentrated Kraft black liquor was used as a carbon precursor, and Cu nanoparticles were homogeneously deposited on the carbon matrix using electrochemical deposition. The textural properties determined using N 2 isotherms indicated increased surface area of a carbon matrix with a micro-mesoporous structure. Voltammetric tests demonstrated that the composite exhibited catalytic properties for electrochemical CO 2 reduction. Compared to the bio-based, porous carbon sample (C matrix), the bio-based carbon electrode electrochemically decorated with Cu nanoparticles (C-Cu composite) exhibited increased current values of approximately 2.4 times, a potential shift of approximately 90 mV, and an onset potential of −1.02 V, under CO 2 saturation.

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“…The possibility of metal recovery from lignin by acidification is followed by precipitation [ 10 ], and heavy metal adsorption onto lignins of various origins has been documented in the literature [ 1 , 11 , 12 , 13 , 14 , 15 ]. More recently, lignin modifications have been made to improve its adsorption capacity [ 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Valorisation of Lignocellulosic Wastes, the Case Study of Eucalypt Stumps Lignin as Bioadsorbent for the Removal of Cr(VI)

Lourenço

Kukić²,

Vasić³

et al. 2022

Molecules

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The main objective of this work was to assess Eucalyptus globulus lignin as an adsorbent and compare the results with kraft lignin, which has previously been demonstrated to be an effective adsorbent. Eucalypt lignin was extracted (by the dioxane technique), characterised, and its adsorption properties for Cr(VI) ions were evaluated. The monomeric composition of both types of lignin indicated a high content of guaiacyl (G) and syringyl (S) units but low content of p-hydroxyphenyl (H), with an H:G:S ratio of 1:50:146 (eucalypt lignin) and 1:16:26 (kraft lignin), as determined by Py-GC/MS. According to elemental analysis, sulphur (2%) and sodium (1%) were found in kraft lignin, but not in eucalypt lignin. The adsorption capacity of the eucalypt lignin was notably higher than the kraft lignin during the first 8 h, but practically all the ions had been absorbed by both the eucalypt and kraft lignin after 24 h (93.4% and 95%, respectively). Cr(VI) adsorption onto both lignins fitted well using the Langmuir adsorption isotherm model, with capacities of 256.4 and 303.0 mg/g, respectively, for eucalypt and kraft. The study’s overall results demonstrate the great potential of eucalypt lignin as a biosorbent for Cr(VI) removal from aqueous solutions.

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A novel nitrogen-doped porous carbon derived from black liquor for efficient removal of Cr(VI) and tetracycline: Comparison with lignin porous carbon

Cited by 57 publications

References 67 publications

Fly‐Ash‐Based Hierarchical MCM‐41 Molecular Sieve as an Efficient Adsorbent for Methylene Blue Removal from Wastewater over a Wide pH

Fly‐Ash‐Based Hierarchical MCM‐41 Molecular Sieve as an Efficient Adsorbent for Methylene Blue Removal from Wastewater over a Wide pH

Bio-based Carbon Electrochemically Decorated with Cu Nanoparticles: Green Synthesis and Electrochemical Performance

Valorisation of Lignocellulosic Wastes, the Case Study of Eucalypt Stumps Lignin as Bioadsorbent for the Removal of Cr(VI)

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