Adsorptive removal of Cr(VI) from wastewater by hexagonal boron nitride-magnetite nanocomposites: Kinetics, mechanism and LCA analysis

Usman, Usman Lawal; Allam, Bharat Kumar; Singh, N. B.; Banerjee, Sushmita

doi:10.1016/j.molliq.2022.118833

Cited by 24 publications

(8 citation statements)

References 57 publications

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“…Notably, linear fitting of the Weber–Morris model exhibited a nonzero intercept, showing that the adsorption process depended on intraparticle diffusion and extra diffusive resistance was involved. 37 …”

Section: Resultsmentioning

confidence: 99%

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One-Step Pyrolysis Fabrication of Magnetic Bagasse Biochar Composites with Excellent Lead Adsorption Performance

et al. 2022

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In the present study, a magnetically separable adsorbent, manganese ferrite (MnFe 2 O 4 )/sugarcane bagasse biochar magnetic composites (MFSCBB-MCs), was fabricated through a one-step pyrolysis method. The characterization of the prepared adsorbents indicated that MnFe 2 O 4 nanoparticles were successfully embedded into the biochar matrix, offering magnetic separability and increasing the negative charges on the surface relative to the pristine biochar. Batch adsorption tests indicated that the adsorption of lead on MFSCBB-MCs was pH- and dose-dependent. The experimental results were effectively fitted using the pseudo-second-order kinetic model ( R 2 > 0.99) and the Langmuir isotherm equation ( R 2 > 0.99), indicating the main chemisorption pathway and monolayer coverage process. Meanwhile, lead adsorption was found to be spontaneous and endothermic, as shown by the study of thermodynamic parameters. The maximum capacity, q m , calculated from the Langmuir model was 155.21 mg·g –1 at 25 °C, demonstrating excellent adsorption capability compared with several previously reported bagasse adsorbents. Based on adsorption mechanism analysis, physical adsorption, electrostatic attraction, and complexation were all involved in the lead(II) adsorption process on MFSCBB-MCs. Furthermore, the adsorbent was easily regenerated as indicated by the high magnetic separation and chemical desorption potential after five cycles, so it is a cost-effective and environmentally favorable adsorbent for wastewater lead removal.

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Section: Resultsmentioning

confidence: 99%

“…The slope decreased toward zero thereafter, and the adsorption gradually changed to equilibrium. Notably, linear fitting of the Weber–Morris model exhibited a nonzero intercept, showing that the adsorption process depended on intraparticle diffusion and extra diffusive resistance was involved …”

Section: Resultsmentioning

confidence: 99%

One-Step Pyrolysis Fabrication of Magnetic Bagasse Biochar Composites with Excellent Lead Adsorption Performance

et al. 2022

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“…Then, the final product was stored in a desiccator. hBN-Fe 3 O 4 [93], Me-Mn (Me = Co, Ni, Sn) [94], Fe-Ti [50], CoCu-Mof [95] and Fe-Cr bimetallic nanoparticles have also been synthesized using this method.…”

Section: Chemical Precipitationmentioning

confidence: 99%

Synthesis of Bimetallic Nanoparticles and Applications—An Updated Review

Idris

Roy

2023

Crystals

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The manipulation of matter at the atomic level (nanotechnology) has experienced an explosion in research interest in recent years. Bimetallic nanoparticles are vital due to their high biocompatibility, stability and comparatively less toxicity. The synthesis methods that include physical, chemical and biological methods are explored and explained in detail, along with their advantages. They have a wide range of applications due to their synergistic properties including biological applications (in medicine and agriculture), environmental application (in water treatment and removal of toxic contaminants), engineering application (in nanosensors, nanochips and nano-semiconductors) and chemical and physical application (in optics, catalysis and paints). The green synthesis approach is a promising method of synthesis that can give rise to more biocompatible and less toxic bimetallic nanoparticles due to increasing environmental pollution. However, despite these interesting attributes of bimetallic nanoparticle, there is still much work to be done to improve the biocompatibility of bimetallic nanoparticles because of their toxicity and potentially hazardous effects.

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“…21,22 Moreover, many boron-containing compounds were also developed to improve the efficiency of the iron cycle. [23][24][25][26][27][28][29] In the periodic table, the specic electronic conguration (1s 2 2s 2 2p 1 ) of the metalloid element boron usually endows boron with high affinity to the metalloid and metal elements. Boron atoms with low valency on the surface of boron powder could provide electrons for Fe(III) species to generate Fe(II).…”

Section: Introductionmentioning

confidence: 99%

“…21,22 Moreover, many boron-containing compounds were also developed to improve the efficiency of the iron cycle. 23–29…”

Section: Introductionmentioning

confidence: 99%

Enhanced Fe(ii)/Fe(iii) cycle by boron enabled efficient Cr(vi) removal with microscale zero-valent iron

Shen,

Gao,

Liu

et al. 2024

RSC Adv.

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Adsorptive removal of Cr(VI) from wastewater by hexagonal boron nitride-magnetite nanocomposites: Kinetics, mechanism and LCA analysis

Cited by 24 publications

References 57 publications

One-Step Pyrolysis Fabrication of Magnetic Bagasse Biochar Composites with Excellent Lead Adsorption Performance

One-Step Pyrolysis Fabrication of Magnetic Bagasse Biochar Composites with Excellent Lead Adsorption Performance

Synthesis of Bimetallic Nanoparticles and Applications—An Updated Review

Enhanced Fe(ii)/Fe(iii) cycle by boron enabled efficient Cr(vi) removal with microscale zero-valent iron

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