Activation and adsorption mechanisms of methylene blue removal by porous biochar adsorbent derived from eggshell membrane

Wu, Tiantian; Yang, Gaopeng; Cao, Jinxing; Zhou, Xu; Jiang, Xiaohong

doi:10.1016/j.cherd.2022.08.042

Cited by 46 publications

(21 citation statements)

References 51 publications

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“…After MB adsorption, the carbonyl group shift from 1630 to 1726 cm −1 might be due to the hydrogen interaction between MB molecules and functional groups in composite membrane. The existence of the peak at 1602 cm −1 due to the vibration benzene rings and unsaturated conjugate bonds in MB chemical structure 27 . The peaks at 1384, 1247, and 884 cm −1 might be originated from the vibration of CH group in methyl group, CN group in benzene ring, and the aromatic ring skeletons of MB 28 .…”

Section: Resultsmentioning

confidence: 95%

“…The negative values of Δ G indicated that adsorption of MB from the aqueous medium on PAM‐DP composite membrane was spontaneous in nature and thermodynamically favorable. Furthermore, the negative value of enthalpy (Δ H ) suggested that the adsorption of MB on PAM‐DP composite membrane was exothermic processes 27 . Therefore, the MB removal on such membrane was feasible at lower temperature conditions.…”

Section: Resultsmentioning

confidence: 99%

“…The existence of the peak at 1602 cm À1 due to the vibration benzene rings and unsaturated conjugate bonds in MB chemical structure. 27 The peaks at 1384, 1247, and 884 cm À1 might be originated from the vibration of C H group in methyl group, C N group in benzene ring, and the aromatic ring skeletons of MB. 28 These findings suggested that MB was successfully adsorbed on the composite membrane.…”

Section: Characterization Of Materialsmentioning

confidence: 99%

“…Furthermore, the negative value of enthalpy (ΔH) suggested that the adsorption of MB on PAM-DP composite membrane was exothermic processes. 27 Therefore, the MB removal on such membrane was feasible at lower temperature conditions. On the other hands, the positive value of ΔS showed the MB uptake on PAM-DP composite membrane was randomness increased at solid-liquid interface during adsorption processing.…”

Section: Adsorption Thermodynamicsmentioning

confidence: 99%

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Adsorptive removal of methylene blue dye using durian peel waste reinforced polyvinyl alcohol‐based composite membrane

Pham,

Nguyen,

Phung

et al. 2024

J of Applied Polymer Sci

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A large amount of dye effluents with biodegradable and highly toxic nature from the dyeing and finishing processes has discharged into natural water bodies without adequate treatment, which adversely impacted on aquatic life and human health. Herein, polyvinyl alcohol/agarose/maltodextrin composite membrane (PAM)‐reinforced durian skin fiber is fabricated for methylene blue (MB) uptake from aqueous medium. Structural analyses of the as‐prepared composite membrane are conducted using scanning electron microscopy, Fourier‐transform infrared spectroscopy, water contact angle, and nitrogen adsorption/desorption isotherm measurement. The important influence of experimental conditions including exposure time between adsorbates and adsorbents, initial MB concentration, solution temperature, and pH are also explored. Furthermore, thermodynamic behavior, nonlinear isotherms, and kinetics along with possible adsorption mechanism are provided to attain the insight into the adsorption nature. The results show that PAM‐reinforced durian peel waste possesses high MB adsorption capacity (105.54 mg g−1), which was controlled by diffusion and chemisorption mechanism. The thermodynamics of methyl blue removal on the composite membrane suggest that the adsorption is spontaneous, favorable, and endothermic in nature. This contribution is expected to inspire the efficient utilization of agriculture by‐products into eco‐friendly and biodegradable adsorbents to purify the dye‐contaminated water.

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Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 99%

Section: Characterization Of Materialsmentioning

confidence: 99%

Section: Adsorption Thermodynamicsmentioning

confidence: 99%

See 2 more Smart Citations

Adsorptive removal of methylene blue dye using durian peel waste reinforced polyvinyl alcohol‐based composite membrane

Pham,

Nguyen,

Phung

et al. 2024

J of Applied Polymer Sci

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“…Recently, among the different traditional methods for separating surfactant-stabilised oil–water emulsions, membrane processes have been acknowledged as the most promising alternative separation medium because of their rapid separation, low energy consumption, and facile operating conditions, especially compared with air flotation [ 15 , 16 ], adsorption [ 17 , 18 ], coalescence [ 19 ], gravity settling, and coagulation [ 20 , 21 , 22 ]. Enhancing the interface hydrophilicity of membranes has shown excellent performance when dealing with oily wastewater [ 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

Constructing a Hierarchical Hydrophilic Crosslink Network on the Surface of a Polyvinylidene Fluoride Membrane for Efficient Oil/Water Emulsion Separation

Zhang

Gao

et al. 2023

Membranes

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Oil/water mixtures from industrial and domestic wastewater adversely affect the environment and human beings. In this context, the development of a facile and improved separation method is crucial. Herein, dopamine was used as a bioadhesive to bind tea polyphenol (TP) onto the surface of a polyvinylidene fluoride (PVDF) membrane to form the first hydrophilic polymer network. Sodium periodate (NaIO4) is considered an oxidising agent for triggering self-polymerisation and can be used to introduce hydrophilic groups via surface manipulation to form the second hydrophilic network. In contrast to the individual polydopamine (PDA) and TP/NaIO4 composite coatings for a hydrophobic PVDF microfiltration membrane, a combination of PDA, TP, and NaIO4 has achieved the most facile treatment process for transforming the hydrophobic membrane into the hydrophilic state. The hierarchical superhydrophilic network structure with a simultaneous underwater superoleophobic membrane exhibited excellent performance in separating various oil-in-water emulsions, with a high water flux (1530 L.m−2 h−1.bar) and improved rejection (98%). The water contact angle of the modified membrane was 0° in 1 s. Moreover, the steady polyphenol coating was applied onto the surface, which endowed the membrane with an adequate antifouling and recovery capability and a robust durability against immersion in an acid, alkali, or salt solution. This facile scale-up method depends on in situ plant-inspired chemistry and has remarkable potential for practical applications.

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Improved Carboxylate Density in Functionalized Biochar for Methylene Blue Adsorption

Rani,

Tiwari,

Sharma

et al. 2024

ChemistrySelect

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Carboxylate appended biochar BCKA was synthesized by a two‐step functionalization of leached rice straw biochar using ethyl 2‐bromoacetate/K2CO3/DMF and hydrolysis to furnish the modfied biochar. The modified biochar was characterized using proximate analysis, CHNS, SS CPMAS 13C NMR, FESEM, FTIR, XPS, BET, and zeta potential. Biochar BCKA was optimized for pH and dose, respectively, as 7 and 0.2 g/L for methylene blue (MB) adsorption with a contact time of 6 h at 298 K. MB removal up to 98% from 20 mg/L dye solution, using BCKA as adsorbent pH 7, 298 K. The nonlinear fit to Langmuir, Freundlich, Temkin, SIPS, and D‐R adsorption isotherm showed a good fit with correlation coefficients (R2) 0.970, 0.969, 0.988, 0.984, and 0.983, respectively, and maximum MB adsorption (qm) of 261 mg/g. Thermodynamic parameters for the adsorption of MB using BCKA were 38.72 kJ/mol (∆H°), 225.42 J/mole K (∆S°), and negative ∆G° confirming the spontaneity driven by entropy. Kinetic studies showed good nonlinear fit to pseudo‐second order (R2 0.967), intraparticle diffusion (R2 0.977), and Elovich equation (R2 0.958) with chemisorption‐based interaction between BCKA and MB. Chemisorption, particularly ion exchange on the surface of BCKA with MB, is inferred from the D‐R isotherm and kinetic analysis. Column breakthrough studies showed Thomas model fit with qt 267.09 mg/g, and efficiency >80% was retained for two cycles of MB adsorption.

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Activation and adsorption mechanisms of methylene blue removal by porous biochar adsorbent derived from eggshell membrane

Cited by 46 publications

References 51 publications

Adsorptive removal of methylene blue dye using durian peel waste reinforced polyvinyl alcohol‐based composite membrane

Adsorptive removal of methylene blue dye using durian peel waste reinforced polyvinyl alcohol‐based composite membrane

Constructing a Hierarchical Hydrophilic Crosslink Network on the Surface of a Polyvinylidene Fluoride Membrane for Efficient Oil/Water Emulsion Separation

Improved Carboxylate Density in Functionalized Biochar for Methylene Blue Adsorption

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