Modification of coal fly ash and its use as low-cost adsorbent for the removal of directive, acid and reactive dyes

Hussain, Zawar; Chang, Na; Sun, Jingqiu; Xiang, Simeng; Ayaz, Tehreem; Zhang, Hao; Wang, Haitao

doi:10.1016/j.jhazmat.2021.126778

Cited by 110 publications

(32 citation statements)

References 43 publications

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“…There are many adsorbents have been studied such as activated carbon (Hameed et al, 2007), graphene oxide (Zhang et al, 2011), carbon nanotubes (Li et al, 2013), bentonite (Oussalah and Boukerroui, 2020), and diatomite (Du and Danh, 2021). Furthermore, a numerical study on using low-cost and regeneration adsorbents have been investigated (Abdul et al, 2021;Alorabi et al, 2021;Hussain et al, 2022;Misran et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Biochar Derived from Sesbania sesban Plant as a Potential Low-Cost Adsorbent for Removal of Methylene Blue

Hiep¹,

Thu²,

Quyen³

et al. 2022

Environ. Nat. Resour. J.

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In this study, biochar made from the Sesbania sesban plant, under slow pyrolysis at 300°C was used to adsorb methylene blue (MB) in aqueous solution. The biochar properties were clarified by diverse analytical methods such as FTIR, SEM, and BET. The results indicated that the surface of biochar was relatively smooth, had porous texture, and stacked evenly. In addition, the biochar had a large specific surface area of 561.8 m2/g and the pHpzc value was 6.9. The effect of adsorbent dosage, initial pH, contact time, and concentration of dye solution on biochar were investigated. The optimum conditions for MB adsorption were found at the MB concentration of 50 mg/L, initial pH of 11, biochar mass of 0.6 mg, and contact time of 30 min. Under these optimal conditions, MB dye removal efficiency was above 90%. Adsorption isotherm data were fitted with the Langmuir isotherm model (R2=0.897) suggesting the adsorption was monolayer, and its maximum adsorption capacity was about 6.6 mg/g. The adsorption kinetic models showed that the linear pseudo-second-order by R2=0.999 was well fitted. The results indicated the enormous potential of Sesbania sesban plant to produce biochar as a low-cost and rather high-effective adsorbent for dye removal from wastewater as well as water quality improvement.

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Section: Introductionmentioning

confidence: 99%

Biochar Derived from Sesbania sesban Plant as a Potential Low-Cost Adsorbent for Removal of Methylene Blue

Hiep¹,

Thu²,

Quyen³

et al. 2022

Environ. Nat. Resour. J.

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“…There are a number of ways for removing synthetic dye nowadays, for instance, biodegradation methods, chemical processing, and adsorption. 3 − 5 Adsorption plays an important role in wastewater treatment, featured as low-cost, efficient, and easy operation in comparison to other ways. 4 , 6 There are several kinds of adsorbents for wastewater treatment, such as diatomite, 7 alumina, 8 calcite, 9 zeolite, 10 and so on.…”

Section: Introductionmentioning

confidence: 99%

“…At the same time, the wastewater entering the receiving water body will destroy the ecological balance and affect the photosynthetic activity due to the reduction of light penetration. There are a number of ways for removing synthetic dye nowadays, for instance, biodegradation methods, chemical processing, and adsorption. − Adsorption plays an important role in wastewater treatment, featured as low-cost, efficient, and easy operation in comparison to other ways. , There are several kinds of adsorbents for wastewater treatment, such as diatomite, alumina, calcite, zeolite, and so on. In recent years, biochar has been recognized as an effective adsorbent for dye removal due to its specific structural characteristics, economic feasibility, and environmental sustainability.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization, and Dye Removal of ZnCl₂-Modified Biochar Derived from Pulp and Paper Sludge

Zhao

Shan

Li³

et al. 2021

ACS Omega

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In this study, pulp sludge-derived biochar synthesized through modification with ZnCl 2 under multistep pyrolysis conditions was investigated for the effective removal of methylene blue (MB) from aqueous solution. Results showed that when the Zn2PT350-700 dosage was 10 mg, the largest adsorption amount of MB was 590.20 mg/g within 24 h under pH = 8. Kinetics and thermodynamics revealed that the adsorption process of MB can be described by the Freundlich isotherm model and the pseudo-second-order kinetic model, which means that multilayer sorption occurred on the heterogeneous surface of Zn2PT350-700. The analysis of the adsorption mechanism showed that electrostatic attraction between the deprotonated functional groups and MB + , cation exchange, and π-electron interaction played a major role in MB adsorption, followed by physical adsorption. After six cycles of desorption–adsorption, Zn2PT350-700 still maintained good adsorption performance. All results demonstrated that Zn2PT350-700 could perform as promising adsorbents for efficient MB removal from wastewater. Using biochar from paper and pulp sludge for wastewater remediation is an ingenious method, which can reduce the environmental and health risks related to industrial waste disposal, while providing remediation of water contaminated with industrial dye effluents.

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“…The primitive y ash has limited ability to remove pollutants. Therefore, the current research has focused on modi cation of y ash, so as to improve its ability to remove pollutants from wastewater (Gao et al 2021;Hussain et al 2021). used HCl and NaOH for acid-base modi cation of y ash to remove nor oxacin from water.…”

Section: )mentioning

confidence: 99%

Removal of COD in wastewater by magnetic coagulant prepared from modified fly ash

Wang

Zhang

et al. 2022

Environ Sci Pollut Res

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In order to investigate the effective method of COD removal from desulfurization wastewater, acidmodi ed y ash (AFA) and base-modi ed y ash (BFA) were prepared by impregnation method. Then, magnetic coagulants (Fe-AFA, Fe-BFA) were prepared by mixing the modi ed y ash with magnetic components. The structural characterization results showed that the speci c surface area and the porosity of y ash were obviously increased after modi cation. Fe-AFA magnetic coagulant has the best performance and superparamagnetism. Under the same experimental conditions, the maximum COD removal amounts of FA, BFA, AFA, Fe-BFA and Fe-AFA were 2.180, 3.209, 4.631, 3.710 and 5.687 mg/g, respectively. The COD removal amount of Fe-AFA was increased by 112.43% compared with the raw FA.The quasi-second-order kinetic and Langmuir equation could well t the COD coagulation process of ve coagulants. After ve cycles, the COD removal amount of Fe-AFA was 2.735 mg/g, and the removal rate still reached 67.53%. These ndings provide a feasible method for the treatment of y ash from coal-red power plants and the preparation of highly e cient COD trapping magnetic coagulants.

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Modification of coal fly ash and its use as low-cost adsorbent for the removal of directive, acid and reactive dyes

Cited by 110 publications

References 43 publications

Biochar Derived from Sesbania sesban Plant as a Potential Low-Cost Adsorbent for Removal of Methylene Blue

Biochar Derived from Sesbania sesban Plant as a Potential Low-Cost Adsorbent for Removal of Methylene Blue

Synthesis, Characterization, and Dye Removal of ZnCl₂-Modified Biochar Derived from Pulp and Paper Sludge

Removal of COD in wastewater by magnetic coagulant prepared from modified fly ash

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Modification of coal fly ash and its use as low-cost adsorbent for the removal of directive, acid and reactive dyes

Cited by 110 publications

References 43 publications

Biochar Derived from Sesbania sesban Plant as a Potential Low-Cost Adsorbent for Removal of Methylene Blue

Biochar Derived from Sesbania sesban Plant as a Potential Low-Cost Adsorbent for Removal of Methylene Blue

Synthesis, Characterization, and Dye Removal of ZnCl2-Modified Biochar Derived from Pulp and Paper Sludge

Removal of COD in wastewater by magnetic coagulant prepared from modified fly ash

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Product

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Synthesis, Characterization, and Dye Removal of ZnCl₂-Modified Biochar Derived from Pulp and Paper Sludge