Efficient removal of Congo red and Alkali Blue 6b using biochar derived from wheat bran：kinetics, isotherms, and mechanism DOI Creative Commons

Ningjie Liang,

Weihua Zou, Qingyun Li

et al.

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 29, 2024

Abstract The biochar with rich functional groups and well-developed pore structure was obtained from wheat bran (WB) via immersing non-immersing (BC-NaK BC-NaK-n) followed by mixed molten salt template for activation. specific surface areas (SBET) of BC-NaK BC-NaK-n were 851.59 m2 g− 1 564.22 1, respectively, which used as adsorbents the removal anionic dyes Congo red (CR) Alkali Blue 6b (AB6b) aqueous solution. results adsorption experiments showed that had better adsorptive capacities than CR AB6b. behaviors AB6b onto in accordance pseudo-second-order kinetic model Langmuir, Sips Koble-Corrigan isotherm models. maximum monolayer on reached 1150.11 mg 622.28 at 298K, respectively. In addition, thermodynamic parameters indicated processes spontaneous endothermic. mechanism mainly included hydrogen bonding, electrostatic interactions, π-π interactions hydrophobic interactions. Overall, prepared WB superior AB6b, could be promising adsorbent organic dye wastewater.

Language: Английский

Synthesis and application of novel sodium carboxy methyl cellulose-g-poly acrylic acid carbon dots hydrogel nanocomposite (NaCMC-g-PAAc/ CDs) for adsorptive removal of malachite green dye DOI Creative Commons

Hayder Jihad Majeed,

Thulfiqar Jasim Idrees,

Makarim A. Mahdi

et al.

Desalination and Water Treatment, Journal Year: 2024, Volume and Issue: unknown, P. 100822 - 100822

Published: Oct. 1, 2024

Language: Английский

Citations

29
Advancements in application of modified biochar as a green and low-cost adsorbent for wastewater remediation from organic dyes DOI Creative Commons
Kosar Hikmat Hama Aziz,

Nazhad Majeed Fatah,

Khalid Taib Muhammad

et al.

Royal Society Open Science, Journal Year: 2024, Volume and Issue: 11(5)

Published: May 1, 2024

Synthetic organic dyes, which are resistant to biodegradation, pose a notable health risk, potentially leading cancer and respiratory infections. Researchers have addressed this concern by exploring physicochemical methods remove dyes from wastewater. A particularly promising solution involves modified biochar adsorbents, demonstrate high efficiency in dye removal. Biochar, charcoal-like material derived biomass pyrolysis, offers advantages such as low cost, eco-friendliness, reusability. Beyond its role sustainable soil remediation, proves effective removing wastewater after undergoing physical or chemical modification. Acid–base activation metal–heteroatom impregnation enhances biochar's adsorption capacity. This comprehensive review examines the attributes of biochar, common for production modification, impacts raw materials, pyrolysis temperature, heating rate residence time. It further elucidates mechanism removal assessing factors influencing efficiency, including feedstock, pH, particle size, initial concentration, dosage reaction explores challenges, opportunities, reusability regeneration treating also discusses recent advances using adsorption-based biochar. The ultimately advocates enhancing performance through post-modification.

Language: Английский

Citations

20
Eco-friendly sensing of hexavalent chromium ions via copper-doped carbon quantum dots: a fluorescent probe for water safety DOI Creative Commons
Shubam Sudan, Jyotsna Kaushal, Thakur Gurjeet Singh

et al.

Microchimica Acta, Journal Year: 2025, Volume and Issue: 192(2)

Published: Jan. 15, 2025

Abstract The hydrothermal synthesis is presented of copper-doped carbon dots (Cu-CDs) from citric acid, urea, and copper chloride, resulting in blue-fluorescent particles with stable emission at 438 nm when excited 340 nm. Through comprehensive spectroscopic microscopic characterization (FTIR, XPS, UV, HRTEM), the Cu-CDs demonstrated remarkable stability across varying pH levels, ionic strengths, temperatures, UV exposure. Notably, exhibit ultra-sensitive selective detection hexavalent chromium [Cr(VI)] ions aqueous environments driven by fluorescence quenching. system showed a robust linear response to Cr(VI) 0–80 µM range, an impressive limit (LOD) 0.186 µM, significantly lower than WHO’s permissible 0.96 µM. These findings position as effective tool for environmental monitoring water safety applications. Graphical

Language: Английский

Citations

2
Biowaste-derived multifunctional CeO2@carbon dot nanospheres for efficient sono-catalytic degradation of Rhodamine B dye and electrochemical sensing of 4-nitrophenol DOI
Vinit Kumar, Indu Kaushal, Ashok K. Sharma

et al.

Applied Surface Science, Journal Year: 2025, Volume and Issue: 688, P. 162351 - 162351

Published: Jan. 11, 2025

Language: Английский

Citations

1
Bentonite clay-modified coconut biochar for effective removal of fluoride: kinetic, isotherm studies DOI
Shubam Sudan, Jyotsna Kaushal,

Ajay Khajuria

et al.

Adsorption, Journal Year: 2024, Volume and Issue: 30(3-4), P. 389 - 401

Published: March 15, 2024

Language: Английский

Citations

8
Effect of varying concentration of dichroic dye on textural, electro-optical, phase transition and band gap studies of zinc oxide nanoparticles induced vertically aligned liquid crystals DOI

Chinky Jaggi,

Parul Malik, Pankaj Kumar

et al.

Journal of Molecular Structure, Journal Year: 2024, Volume and Issue: 1311, P. 138375 - 138375

Published: April 16, 2024

Language: Английский

Citations

4
In-situ homeotropic alignment of dye doped liquid crystal molecules on multilayered self assembled nanoparticles in confined cells for next generation display devices DOI
Ankit Rai Dogra, Vandna Sharma, Parul Malik

et al.

Optical Materials, Journal Year: 2024, Volume and Issue: 154, P. 115731 - 115731

Published: June 24, 2024

Language: Английский

Citations

4
Materials and synthesis of eco-friendly carbon dots for sustainable solutions DOI
Themba D. Ntuli, Lerato F. E. Machogo-Phao,

Morena Xaba

et al.

Comprehensive analytical chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Language: Английский

Citations

0
Areca Catechu Biochar and Nano-Biochar as Adsorbents for Congo Red: Synthesis, Characterization, and Performance Evaluation DOI Creative Commons
Robiatul Adawiyah,

Nova Yuliasari,

Yulizah Hanifah

et al.

BULLETIN OF CHEMICAL REACTION ENGINEERING AND CATALYSIS, Journal Year: 2025, Volume and Issue: 20(1), P. 112 - 128

Published: Feb. 10, 2025

The presence of hazardous synthetic dyes such as Congo Red in industrial wastewater poses a significant environmental threat. This study explores the potential biochar (BC) and nano-biochar (nano-BC), derived from Areca catechu husk sustainable adsorbents for dye removal. Nano-BC was synthesised via hydrothermal carbonisation mechanical ball milling, leading to enhanced structural surface properties. X-ray Diffraction (XRD) revealed that Pinang is predominantly amorphous, while BC exhibits increased crystallinity with sharp peaks, nano-BC demonstrates highest nanostructural refinement. Fourier Transform Infra (FTIR) confirmed transformation aliphatic-rich raw biomass into aromatic-dominant structures nano-BC, showing more pronounced graphite-like features. Scanning Electron Microscope (SEM) illustrated morphological evolution, exhibiting refined, uniformly porous structures. BET analysis has significantly higher area 41.38 m²/g smaller pore size 8.4928 nm compared 22.38 15.39 nm, enhancing adsorption capacity. Furthermore, kinetics followed pseudo-second-order model, isothermal monolayer maximum capacity (Qmax = 154.526 mg/g). These findings highlight superior performance emphasising its environmentally friendly water treatment applications. Copyright © 2025 by Authors, Published BCREC Publishing Group. an open access article under CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

Language: Английский

Citations

0
A comparative analysis of single-step and multi-step methods for producing magnetic activated carbon from palm kernel shells: Adsorption of methyl orange dye DOI Creative Commons
Joko Waluyo, Fitria Rahmawati,

Muhammad Ghozy Izzulhaq

et al.

Green Processing and Synthesis, Journal Year: 2025, Volume and Issue: 14(1)

Published: Jan. 1, 2025

Abstract Synthetic dyes in wastewater present a challenging problem that requires special attention due to the high environmental risks, and magnetic adsorbents appear as promising alternatives solve it. Magnetic activated carbons (MAC) were prepared by comparing single- multi-step methods. Palm kernel shells used precursors, with ZnCl 2 , then magnetized adding solution containing Fe 3+ ions (FeCl 3 ). Iron compound inclusion aims enhance effectiveness of carbon an adsorbent for liquid waste. Fourier transform infra-red characterization showed functional groups detected on MAC O–H, C═O, C═C, C≡N, C–O. The effect preparation methods dye concentration (10–30 mg·L −1 ) adsorption kinetics investigated. Characterization through pyrolysis (M-MAC) has larger pores, achieving capacity up 6.953 mg·g 28% removal efficiency, making it superior performance. Furthermore, data fitted well Redlich–Peterson isotherm model R = 0.9788 M-MAC, while agreed both pseudo-first-order pseudo-second-order models. Moreover, NaOH successfully recovered desorption efficiencies 98.34%.

Language: Английский

Citations

0