Efficiency of iron modified <i>Pyrus pyrifolia</i> peels biochar as a novel adsorbent for methylene blue dye abatement from aqueous phase: equilibrium and kinetic studies

Fakhar, Nida; Khan, Suhail Ayoub; Khan, Tabrez Alam; Siddiqi, Weqar Ahmad

doi:10.1080/15226514.2021.2021848

Cited by 15 publications

(3 citation statements)

References 56 publications

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“…The Freundlich model states that adsorption happens at nonuniform surfaces, in contrast to the Langmuir isotherm model’s premise that monolayer adsorption occurs at homogeneous active sites on the adsorbent structure. 30 , 31 The Freundlich isotherm displayed the best-fit model in this experiment because it had a higher correlation coefficient ( R 2 = 0.95) than Langmuir. By different factors, it can be demonstrated that C. bonplandianus biochar treated with Fe 3 O 4 has nonuniform surfaces on which BB 1 and BO 2 dyes adsorb.…”

Section: Resultsmentioning

confidence: 83%

“…By using Langmuir and Freundlich models, the isotherm results of BB 1 and BO 2 dye sorption on FO-CBPBB were examined (Table and Figure ). The Freundlich model states that adsorption happens at nonuniform surfaces, in contrast to the Langmuir isotherm model’s premise that monolayer adsorption occurs at homogeneous active sites on the adsorbent structure. , The Freundlich isotherm displayed the best-fit model in this experiment because it had a higher correlation coefficient ( R 2 = 0.95) than Langmuir. By different factors, it can be demonstrated that C.…”

Section: Resultsmentioning

confidence: 86%

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Metal Oxide-Impregnated Biochar for Azo Dye Remediation as Revealed through Kinetics, Thermodynamics, and Response Surface Methodology

Aslam,

Batool,

Noreen

et al. 2024

ACS Omega

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This study reports for the first time the adsorption capacity of a novel adsorbent Croton bonplandianus Baill. biochar. Its adsorption capacity was further enhanced by loading magnetic composites on it, which makes it an efficient medium for the adsorption of dyes. Two azo dyes, Basic Brown 1 (BB 1 ) and Basic Orange 2 (BO 2 ), were studied for their effective adsorption from aqueous media. A comprehensive characterization was performed by using scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) to study the properties of Fe 2 O 3 -loaded C. bonplandianus Baill. biochar (FO-CBPBB). A series of batch experiments were conducted to optimize various parameters (pH, contact time, adsorbent amount, initial BB 1 and BO 2 concentrations, and temperature) for the maximum adsorption of BB 1 and BO 2 on the FO-CBPBB adsorbent. The percentage of BB 1 and BO 2 dyes that adsorb to FO-CBPBB under the best experimental circumstances (pH of solution 7, contact time 80 min, temperature of solution 40 °C, initial BB 1 and BO 2 dye concentrations 80 mg L −1 , and adsorbent dose 1 g L −1 ) was 93 and 95%, respectively. The best adsorption of BB 1 and BO 2 was accomplished by optimizing the effects of several factors, including the starting dye concentration, contact time, and temperature, based on the central composite design. The Freundlich and Langmuir isotherm models were used to examine the equilibrium data. The Langmuir isotherm with the greatest adsorption capacity and R 2 value effectively captured the experimental results. When kinetic parameters were investigated, it was found that pseudo-second-order was appropriate, reflecting the fact that the dye−adsorbent interaction was the rate-controlling factor in this study. The sorption process was endothermic and spontaneous, as shown by the thermodynamic variables. Based on the interaction between the adsorbent and azo dyes, it was concluded that the adsorption process was electrostatic in nature. Adsorbents that have been synthesized can effectively remove azo dyes from wastewater. Excellent regeneration efficiency was exhibited by FO-CBPBB, which makes it an ecofriendly and cost-effective alternative to other costly techniques applied for water purification.

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Section: Resultsmentioning

confidence: 83%

Section: Resultsmentioning

confidence: 86%

Metal Oxide-Impregnated Biochar for Azo Dye Remediation as Revealed through Kinetics, Thermodynamics, and Response Surface Methodology

Aslam,

Batool,

Noreen

et al. 2024

ACS Omega

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“…The magnetic properties of biochar facilitate easy separation from solution, thereby enhancing its removal efficiency. Fakhar et al fabricated a magnetic biochar adsorbent using discarded peels from Pyrus pyrifolia, impregnated with FeCl 3 as a precursor [137]. This magnetic biochar, easily separable, proved efficient in removing methylene blue as a model organic dye pollutant.…”

Section: Iron-modified Biochar (Magnetic Biochar)mentioning

confidence: 99%

Advancements in application of modified biochar as a green and low-cost adsorbent for wastewater remediation from organic dyes

Hama Aziz,

Fatah,

Muhammad

2024

R. Soc. Open Sci.

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

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Adsorption behavior of lead, cadmium, and arsenic on manganese-modified biochar: competition and promotion

Zeng,

Si,

Dong

et al. 2024

Environ Geochem Health

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Efficiency of iron modified Pyrus pyrifolia peels biochar as a novel adsorbent for methylene blue dye abatement from aqueous phase: equilibrium and kinetic studies

Cited by 15 publications

References 56 publications

Metal Oxide-Impregnated Biochar for Azo Dye Remediation as Revealed through Kinetics, Thermodynamics, and Response Surface Methodology

Metal Oxide-Impregnated Biochar for Azo Dye Remediation as Revealed through Kinetics, Thermodynamics, and Response Surface Methodology

Advancements in application of modified biochar as a green and low-cost adsorbent for wastewater remediation from organic dyes

Adsorption behavior of lead, cadmium, and arsenic on manganese-modified biochar: competition and promotion

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