The enhancement of reactive red 24 adsorption from aqueous solution using agricultural waste-derived biochar modified with ZnO nanoparticles

Van, Huu Tap; Nguyen, Lan Huong; Dang, Nguyen Van; Chao, Huan‐Ping; Nguyen, Quang Trung; Nguyen, Thu Huong; Nguyen, Thi Bich Lien; Thành, Đặng Văn; Nguyen, Hai Duy; Thang, Phan Quang; Thanh, Pham Thi Ha; Hoang, Vinh Phu

doi:10.1039/d0ra09974k

Cited by 24 publications

(7 citation statements)

References 60 publications

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“…The adsorption capacity of compost estimated from both equations for all dyes was similar and very close to that determined directly from the laboratory experiment (Table 3). These results indicate that the adsorption of the studied dyes on the compost was dominated by valence forces through electron exchange between the dye anions and positively charged sites on the compost surface, such as iron oxides ( Van et al 2021).…”

Section: Study Of Kineticsmentioning

confidence: 83%

“…Most intermediate metabolites of azo dyes are also aromatic substances, often mutagenic and carcinogenic (Türgay et al 2011). Some azo dyes may be incompletely degraded or converted to harmful aromatic amines in the presence of anoxic sediments ( Van et al 2021). In addition, dye-contaminated wastewater typically contains high levels of chemical oxygen demand (COD), biochemical oxygen demand (BOD), total dissolved solids (TDS) and pH (Millington 2009), often exceeding the limits for e uent standards set by the US EPA (2021) and/or national regulations (Minister of Maritime Economy and Inland Navigation 2019).…”

Section: )mentioning

confidence: 99%

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Compost as green adsorbent for the azo dyes - structural characterization and dye removal mechanism

Kyzioł-Komosińska

Dzieniszewska

Pasieczna-Patkowska

et al. 2023

Preprint

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The aim of the study was to determine the feasibility of using compost as a 'green adsorbent' for the removal of five anionic azo dyes belonging to the monoazo, disazo and trisazo classes: Direct Red 81 (DR-81), Direct Blue 74 (DB-74), Reactive Blue 81 (RB-81), Reactive Red 198 (RR-198) and Acid Black 194 (ABk-194) from aqueous solutions. The adsorption capacity of the compost was determined using a batch method with initial dye concentrations ranging from 1 to 1000 mg/L. The kinetics of dye removal followed a pseudo-second-order model, indicating chemisorption as the rate-limiting step. The monoazo dyes RB-81, RR-198 and ABk-194 with the smaller molecule size were adsorbed the fastest. The Langmuir and Sips models best fit the adsorption system with maximum adsorption capacities in the range of 12.64 mg/g (RR-198) − 20.92 mg/g (ABk-194) and 12.57 mg/g (RR-198) − 25.43 mg/g (ABk-194), respectively. The adsorption depended on the dye structure, especially on the ratio of the numbers of proton donor to proton acceptor locations in functional groups. The differences in adsorption mechanism could be explained by thermodynamic properties such as dipole moments, HOMO-LUMO energy gap, polarisability, electron affinity, ionisation potential, electronegativity and chemical hardness obtained by Density Functional Theory.

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Section: Study Of Kineticsmentioning

confidence: 83%

Section: )mentioning

confidence: 99%

Compost as green adsorbent for the azo dyes - structural characterization and dye removal mechanism

Kyzioł-Komosińska

Dzieniszewska

Pasieczna-Patkowska

et al. 2023

Preprint

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“…The reusability of the adsorbents was examined for 6 repeated cycles under similar operational conditions. After each cycle, the used adsorbents were separated by an external magnet, washed for several times, and dried for reuse for the next cycle [96]. Figure 11 shows the adsorption efficiency of CF and CG on Ba(II) for 6 repeated uses, although the adsorption efficiency of CF and CG was reduced after each cycle the adsorption capacity.…”

Section: Effect Of Ph On Stability Of Cf and Cg Adsorbentsmentioning

confidence: 99%

Study of Barium Adsorption from Aqueous Solutions Using Copper Ferrite and Copper Ferrite/rGO Magnetic Adsorbents

Mary¹,

Vijaya²,

Bououdina

et al. 2022

Adsorption Science & Technology

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The development of advanced materials for the removal of heavy metal ions is a never-ending quest of environmental remediation. In this study, a facile and cost-effective approach was employed to synthesize copper ferrite (CF) and copper ferrite/reduced graphene oxide (CG) by microwave assisted combustion method for potential removal of barium ions from aqueous medium. The physiochemical characterizations indicated the formation of magnetic nanocomposite with an average crystallite size of CF and CG is 32.4 and 30.3 nm and with specific surface area of 0.66 and 5.74 m 2 /g. The magnetic results possess multidomain microstructures with saturation magnetization of 37.11 and 33.84 emu/g for CF and CG. The adsorption studies prove that upon addition of rGO on the spherical spinel ferrite, the adsorption performance was greatly improved for CG nanocomposite when compared with the bare CF nanoparticles. The proposed magnetic adsorbent demonstrated a relatively high Ba 2+ adsorption capacity of 161.6 mg•g -1 for CG nanocomposite when compared to 86.6 mg•g -1 for CF nanoparticles under optimum conditions (pH = 7 ; T = 25 °C). The pseudo-first-order (PFO), pseudo-second-order (PSO), and Elovich models were fitted to the kinetic data, the yielded R 2 value of 0.9993 (PSO) for CF and 0.9994 (PSO) for CG which is greater than the other two models, which signify that the adsorption process is chemisorption. Thermodynamic studies show that barium adsorption using CF and CG adsorbents is endothermic. The as-fabricated CuFe 2 O 4 /rGO nanocomposite represents a propitious candidate for the removal of heavy metal ions from aqueous solutions.

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“…A combination of biochar and nanomaterials has been developed to improve adsorption capacity through several mechanisms, such as enhancing the porous structure and increasing the number of surface functional groups and the surface-to-volume ratio. − Techniques used to combine biochar and nanomaterials include impregnation, − chemical coprecipitation, , direct pyrolysis, − and others. , The porous carbon structure can be improved by activating the raw material with agents, such as ZnCl 2 , FeCl 3 , KOH, and H 3 PO 4 , in two different ways: aqueous state and solid state. ZnO nanoparticles are then loaded onto the biochar surface through self-reduction or precipitation mild pyrolysis.…”

Section: Introductionmentioning

confidence: 99%

Facile One-Step Pyrolysis of ZnO/Biochar Nanocomposite for Highly Efficient Removal of Methylene Blue Dye from Aqueous Solution

et al. 2023

Self Cite

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In this work, we developed a facile one-step pyrolysis method for preparing porous ZnO/biochar nanocomposites (ZBCs) with a large surface area to enhance the removal efficiency of dye from aqueous solution. Peanut shells were pyrolyzed under oxygen-limited conditions with a molten salt ZnCl 2 , which played the roles of the activating agent and precursor for the formation of nanoparticles. The effects of the mass ratio between the molten salt ZnCl 2 and peanut shells as well as pyrolysis temperature on the formation of ZBCs were investigated. Characterization results revealed that the as-synthesized ZBCs exhibited a highly porous structure with a specific surface area of 832.12 m 2 /g, suggesting a good adsorbent for efficient removal of methylene blue (MB). The maximum adsorption capacity of ZBCs on MB was 826.44 mg/g, which surpassed recently reported adsorbents. The formation mechanism of ZnO nanoparticles on the biochar surface was due to ZnCl 2 vaporization and reaction with water molecules extracted from the lignocellulosic structures. This study provides a basis for developing a simple and large-scale synthesis method for wastewater with a high adsorption capacity.

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The enhancement of reactive red 24 adsorption from aqueous solution using agricultural waste-derived biochar modified with ZnO nanoparticles

Abstract: In this study, two types of agricultural wastes, sugarcane bagasse (SB) and cassava root husks (CRHs), were used to fabricate biochars.

Cited by 24 publications

References 60 publications

Compost as green adsorbent for the azo dyes - structural characterization and dye removal mechanism

Compost as green adsorbent for the azo dyes - structural characterization and dye removal mechanism

Study of Barium Adsorption from Aqueous Solutions Using Copper Ferrite and Copper Ferrite/rGO Magnetic Adsorbents

Facile One-Step Pyrolysis of ZnO/Biochar Nanocomposite for Highly Efficient Removal of Methylene Blue Dye from Aqueous Solution

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