Hydrothermally engineered Eriobotrya japonica leaves/MgO nanocomposites with potential applications in wastewater treatment

Messaoudi, Noureddine El; Khomri, Mohammed El; Fernine, Yasmine; Bouich, Amal; Jada, Amane; Sher, Farooq; Lima, Éder C.

doi:10.1016/j.gsd.2022.100728

Cited by 40 publications

(9 citation statements)

References 59 publications

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“…2, it was observed that the R 2 value is nearer to 1 in the case of the pseudo‐second‐order than the pseudo‐first‐order equation, stating that chemisorption is the rate‐limiting step. Similar observations were reported by El Messaoudi et al 10, 21.…”

Section: Resultssupporting

confidence: 91%

Application of Preformed Floc Adsorbents in the Removal of Acid Dye from an Aqueous Solution

Nijagala,

Vallameti

2024

Chem Eng & Technol

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Preformed flocs prepared by using coagulants, i.e. Fe2(SO4)3, MnSO4.4H2O, and MnCl2.4H2O, were applied as adsorbents for the decolorization of an aqueous C.I. Acid Red 1 dye solution. In order to determine the decolorizing efficiency of different adsorbents, kinetic and equilibrium studies were carried out at the optimum pH. Excellent color removal of 87 % was obtained with Fe2(SO4)3 at pH 4, good color removal of 65 % was achieved with manganese sulfate at pH 10, and moderate color removal of 58 % was obtained with manganese chloride at pH 10, at an optimum sorbent dose of 500 mg L−1 and an equilibrium contact time of 15 min. The sorption data of the equilibrium studies fitted well to the Langmuir isotherm, stating the occurrence of monolayer formation in the adsorption process of dye color removal. The maximum adsorption capacities of ferric sulfate and manganese sulfate are 47.619 and 23.474 mg g−1, respectively. The data of the kinetic studies fitted well to the pseudo‐second‐order equation, stating that chemisorption is the rate‐limiting step.

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Section: Resultssupporting

confidence: 91%

Application of Preformed Floc Adsorbents in the Removal of Acid Dye from an Aqueous Solution

Nijagala,

Vallameti

2024

Chem Eng & Technol

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“…The predicted values obtained from the model are close to the experimental values, as shown by the high regression coefficient, R 2 value. The values of R 2 (94.56%) and adequate precision (>4) obtained for the regression models indicates the high accuracy of the chosen models [ 45 ]. It also means that the model does not explain only about 5.44% of the variation.…”

Section: Resultsmentioning

confidence: 99%

Rapid Removal of Toxic Remazol Brilliant Blue-R Dye from Aqueous Solutions Using Juglans nigra Shell Biomass Activated Carbon as Potential Adsorbent: Optimization, Isotherm, Kinetic, and Thermodynamic Investigation

Parimelazhagan

Yashwath

Pushparajan

et al. 2022

IJMS

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Recently, the treatment of effluent by agricultural waste biomass has significantly attracted wide interest among researchers due to its availability, efficacy, and low cost. The removal of toxic Remazol Brilliant Blue-R (RBBR) from aqueous solutions using HNO3-treated Juglans nigra (walnut) shell biomass carbon as an adsorbent has been examined under various experimental conditions, such as initial pH, adsorbate concentration, adsorbent dosage, particle size, agitation speed, and type of electrolyte. The experiments are designed to achieve the maximum dye removal efficiency using the response surface methodology (RSM). The optimum pH, adsorbent dosage, and particle size were found to be 1.5, 7 g L−1, and 64 μm, respectively for maximum decolorization efficiency (98.24%). The prepared adsorbent was characterized by particle size, Brunauer–Emmett–Teller (BET) surface area, pore volume, zero-point charge (pHzpc), Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy/energy dispersive X-ray spectroscopy (FE-SEM/EDX), X-ray diffraction (XRD), and thermogravimetric analysis (TGA). Based on fitting the experimental data with various models, the isotherm and kinetic mechanism are found to be more appropriate with Langmuir isotherm and pseudo-second-order kinetics. The adsorption mechanism can be described by the intra-particle diffusion model, Bangham, and Boyd plots. The overall rate of adsorption is controlled by the external film diffusion of dye molecules. The maximum monolayer adsorption capacity, (qmax) 54.38 mg g−1 for RBBR dye, was obtained at a temperature of 301 K. From a thermodynamic standpoint, the process is endothermic, spontaneous, and the chemisorption process is favored at high temperatures. Desorption studies were conducted with various desorbing reagents in various runs and the maximum desorption efficiency (61.78% in the third run) was obtained using the solvent methanol. Reusability studies demonstrated that the prepared adsorbent was effective for up to three runs of operation. The investigation outcomes concluded that walnut shell biomass activated carbon (WSBAC) is a cost-effective, eco-friendly, and bio-sustainable material that can be used for synthetic dye decolorization in aqueous media.

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“…First, based on the adsorption mechanism of the adsorbent, the adsorption/desorption kinetics can be accelerated by proper modification of the adsorbent. Also, Taheri et al proved that the active sites of biochar from pomegranate are the reason for its rapid adsorption kinetics at the initial stage of adsorption process [160] . As mentioned above, although the water vapor adsorption mechanism of various adsorbents is different, it can be generally classified into the following processes: nucleation, cluster/layer adsorption and pore filling.…”

Section: Kinetics Process Of Adsorbentmentioning

confidence: 99%

Recent advances in porous adsorbent assisted atmospheric water harvesting: a review of adsorbent materials

2023

Chem Synth

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Water shortage is an increasing threat to humankind. Porous sorbent assisted atmospheric water harvesting (psaAWH) has emerged as an effective technological countermeasure. In this review, we summarize the types of porous adsorbents used in psaAWH and provide an overview of their states of development. The water adsorption mechanism and the processes associated with each material are analyzed, and the application prospects of the adsorbents are evaluated. The effect of the inherent properties (pore size, functional group, etc.) of the adsorbent on the water harvesting performance is also discussed. Further, we focus on the water adsorption/desorption kinetics of the adsorbents and outline various methods to improve the kinetics. At this stage, there are many strategies for improving the kinetics of the adsorbent, which in turn influences the adsorption process and intra/inter-crystalline diffusion. However, there is still limited research on the transport of water molecules in microporous adsorbents for psaAWH. Thus, this aspect is re-examined herein from a new perspective (superfluidity) in the review. Based on the discussion, we can reasonably infer that water molecule superfluidity can exist in nanoconfined channels, thus promoting the rapid transport of water molecules. The formation of water superfluidity is a feasible strategy for improving the intracrystalline diffusion of the psaAWH adsorbent. Finally, we consider the future developments and challenges of psaAWH in detail. We think this review can serve as a guide for further research in this ever-expanding field.

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Hydrothermally engineered Eriobotrya japonica leaves/MgO nanocomposites with potential applications in wastewater treatment

Cited by 40 publications

References 59 publications

Application of Preformed Floc Adsorbents in the Removal of Acid Dye from an Aqueous Solution

Application of Preformed Floc Adsorbents in the Removal of Acid Dye from an Aqueous Solution

Rapid Removal of Toxic Remazol Brilliant Blue-R Dye from Aqueous Solutions Using Juglans nigra Shell Biomass Activated Carbon as Potential Adsorbent: Optimization, Isotherm, Kinetic, and Thermodynamic Investigation

Recent advances in porous adsorbent assisted atmospheric water harvesting: a review of adsorbent materials

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