Fixed-bed column study for removal of phenol by neem leaves – Experiment, MLR and ANN analysis

Mandal, Arabinda; Majumder, Akanksha; Banik, Ihita; Ghosh, Koushik; Bar, Nathalie; Das, Sudip Kumar

doi:10.1016/j.scp.2021.100514

Cited by 13 publications

(2 citation statements)

References 65 publications

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“…This could be due to the restriction caused by a significant lack of an adsorbent material in substantial quantity [15]. Lignocellulosic biomasses that have been utilized to remove the phenol from wastewater in fixed-bed are Lantana camara [16], sugarcane bagasse [17], date palm [18], fox nutshell [19], corn cob [20], neem leaves [21], and rice husk [22]. These biomasses offer an alternative to traditional sources, which may serve as potential precursors to produce AC.…”

Section: Introductionmentioning

confidence: 99%

Adsorption Performance of Fixed-Bed Columns for the Removal of Phenol Using Baobab Fruit Shell Based Activated Carbon

Nedjai,

Kabbashi,

Alam

et al. 2024

IIUMEJ

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A continuous adsorption study in a fixed-bed column using baobab fruit shell activated carbon (BF-AC) was investigated for phenol removal from an aqueous solution. Baobab fruit shell (BFS) was chemically activated using potassium hydroxide (KOH) at 700 °C in a nitrogen (N2) atmosphere. Scanning electron microscope (SEM), X-ray diffraction (XRD), and BET surface area analyses were performed for the characterization of BF-AC. Fixed-bed experiments were carried out and the effect of feed flowrate (10, 15, 20 mL/min) and bed height (5, 10, 15 cm) on the adsorption were investigated by evaluating the breakthrough curves. BET surface area of BF-AC was 1263 m2/g, indicating its well-developed pores and its good quality as an adsorbent. The findings showed that the exhaustion time (t????) and breakthrough time (tb) reduced as the flowrate augmented, while they increased as the bed height augmented. With the increase in the bed height and the flowrate, phenol solution volume treated was augmented. Also, BF-AC with bed height of 15 cm provided better elimination of phenol with carbon usage rate (CUR) of 1.74 g/L and empty bed contact time (EBCT) of 9.9 minutes. According to the findings, BF-AC is an effective adsorbent for removing phenol from aqueous solutions. ABSTRAK: Kajian penjerapan berterusan menggunakan kulit buah baobab diaktifkan karbon (BF-AC) telah dikaji mengguna pakai kolum lapisan tetap bagi penyingkiran fenol daripada larutan cecair. Kulit buah Baobab (BFS) diaktifkan secara kimia menggunakan kalium hidroksida (KOH) pada suhu 700 °C dalam atmosfera nitrogen (N2). Imbasan mikroskop elektron (SEM), pembelahan sinar-X (XRD, dan analisis permukaan BET dijalankan bagi pencirian BF-AC. Eksperimen kolum lapisan tetap bagi mengkaji kesan penjerapan pada aliran suapan (10, 15, 20 mL/min) dengan ketinggian (5, 10, 15 cm) dinilai melalui lengkung bulus. Kawasan permukaan BET BF-AC adalah 1263 m2/g, menunjukkan liang yang elok terbentuk dan berkualiti baik sebagai penyerap. Penemuan ini menunjukkan bahawa puncak masa maksima (t????) dan masa terbaik (tb) berkurangan pada kadar aliran bertambah, sebaliknya ianya meningkat pada ketinggian bertambah. Dengan penambahan ketinggian katil dan kadar aliran, jumlah larutan fenol yang dirawat telah bertambah. Selain itu, BF-AC pada ketinggian 15 cm menunjukkan penghapusan fenol terbaik pada kadar penggunaan karbon (CUR) 1.74 g/L dan masa sentuhan kolum kosong (EBCT) 9.9 minit. Ini menunjukkan, BF-AC adalah penyerap yang berkesan bagi menyingkirkan fenol daripada larutan cecair.

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Section: Introductionmentioning

confidence: 99%

Adsorption Performance of Fixed-Bed Columns for the Removal of Phenol Using Baobab Fruit Shell Based Activated Carbon

Nedjai,

Kabbashi,

Alam

et al. 2024

IIUMEJ

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“…Batch adsorption processes may not be a convenient method for an industrial scale to deal with high-flow rate treatments, although it provides very useful information for the design of industrial-scale processes. Adsorption in a fixed bed column can be used continuously under high effluent flow rates, and it has been used in many pollution control processes [11][12][13][14]. However, to properly design and operate fixed-bed filters, the adsorption process must be understood, and both equilibrium and dynamic adsorption studies are required.…”

Section: Introductionmentioning

confidence: 99%

Batch and Continuous Column Adsorption of p-Nitrophenol onto Activated Carbons with Different Particle Sizes

et al. 2023

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The study focused on investigating the solvent adsorption of p-Nitrophenol (PNP) onto activated carbons for wastewater treatment. It explored the influence of adsorbate concentration and adsorbent size on equilibrium isotherms and removal rates to develop efficient adsorption processes. The study examined adsorption isotherms under equilibrium conditions utilizing both the Langmuir and Double-Langmuir models and the Dubinin–Radushkevich equation. Remarkably, all the models demonstrated equally excellent fitting to the experimental data. Kinetics of PNP adsorption were investigated using pseudo-first-order, pseudo-second-order, and intraparticle diffusion kinetic models. This provided insights into the dominant adsorption mechanism and mass transfer phenomena, aiding the design of efficient wastewater treatment processes. Strong correlations (correlation coefficients > 0.9) were found between the models and experimental data for three types of activated carbons under batch conditions. This validation enhances the reliability and applicability of the models, supporting their practical use. The study also observed a slight increase in maximum adsorption capacity (qmax) with decreasing particle size, although there is not a significant difference: 340, 350, and 365 mg·g−1, for CB-L, CB-M, and CB-S, respectively. This insight helps in selecting appropriate activated carbon for effective PNP removal, considering both adsorption capacity and particle size. Furthermore, the analysis of PNP adsorption under dynamic conditions in fixed-bed columns highlighted the significance of inlet velocity and carbon mass in determining breakthrough time, with particle size playing a secondary role. This information aids in optimizing the design and operation of fixed-bed adsorption systems for efficient PNP removal. In summary, this study’s significant contributions lie in enhancing our understanding of PNP adsorption in wastewater treatment. By investigating equilibrium isotherms, kinetics, and mass transfer phenomena, it provides validated models, insights into adsorption capacity and particle size, and practical guidance for dynamic adsorption systems. These findings contribute to the development of efficient and sustainable wastewater treatment methods.

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A Machine Learning Technique for the Study of Adsorption of Phenol Using Solid Waste

Bar,

Mandal,

Das

2023

Studies in Big Data

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Fixed-bed column study for removal of phenol by neem leaves – Experiment, MLR and ANN analysis

Cited by 13 publications

References 65 publications

Adsorption Performance of Fixed-Bed Columns for the Removal of Phenol Using Baobab Fruit Shell Based Activated Carbon

Adsorption Performance of Fixed-Bed Columns for the Removal of Phenol Using Baobab Fruit Shell Based Activated Carbon

Batch and Continuous Column Adsorption of p-Nitrophenol onto Activated Carbons with Different Particle Sizes

A Machine Learning Technique for the Study of Adsorption of Phenol Using Solid Waste

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