Thermally activated adsorbent over chemically modified Carica papaya tree adsorbents for removal of chromium from tannery wastewater

Hashem, Md. Abul; Mim, Sadia; Payel, Sofia; Husne-Al-Jabeen,; Sakib, Md. Sajedur Rahman; Mizan, Al; Basaran, Bahri; Yapici, Ali Nail; Sarker, Majher I.

doi:10.1016/j.biteb.2023.101692

Cited by 3 publications

(5 citation statements)

References 64 publications

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“…Various parameters, such as contact time (0-315 min), initial concentration (50-200 ppm), temperature (25-50 • C), pH (4-10), and dosage (0.5-0.95 g), were systematically investigated to assess their impact on adsorption efficiency. The adsorption capacity (q), a critical metric quantifying the maximum adsorbate binding per unit mass or volume on the adsorbent, was determined using the formula presented in Equation (1) [32][33][34]:…”

Section: Batch Experimentationmentioning

confidence: 99%

“…Various isotherm models, including Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich (D-R), were utilized to explore the relationship between adsorbate concentration in the solution and its interaction with the adsorbent material [32][33][34]. The Langmuir model, representing monolayer adsorption on a uniform surface, is defined by Equation ( 2).…”

Section: Batch Experimentationmentioning

confidence: 99%

“…The Dubinin-Radushkevich model, describing adsorption on heterogeneous surfaces, is formulated in Equation ( 5). Kinetic adsorption studies employing the pseudo-first-order (Equation ( 6)) and pseudo-second-order (Equation ( 7)) models were conducted to elucidate the adsorption rate over time [33][34][35]. Thermodynamic analysis, vital for understanding the spontaneity, randomness, and energetics of the adsorption process, involves parameters such as Gibbs free energy (∆G), calculated using Equation ( 8) [33][34][35].…”

Section: Batch Experimentationmentioning

confidence: 99%

“…Kinetic adsorption studies employing the pseudo-first-order (Equation ( 6)) and pseudo-second-order (Equation ( 7)) models were conducted to elucidate the adsorption rate over time [33][34][35]. Thermodynamic analysis, vital for understanding the spontaneity, randomness, and energetics of the adsorption process, involves parameters such as Gibbs free energy (∆G), calculated using Equation ( 8) [33][34][35]. Enthalpy (∆H) and entropy (∆S), revealing the energy and randomness of adsorption, are determined using the van't Hoff equation in Equation ( 9) [34,36]:…”

Section: Batch Experimentationmentioning

confidence: 99%

“…SiO2 ( )), 31.64° (intensity 56, SiO2),33.24° (intensity 62, Na2O), 34.7° (intensity 92, Al2O3 ()), 35.62° (intensity 58, SiO2), 37.7° (intensity 32, Al2O3), 41.04° (intensity 24, Al2O3), 42.8° (intensity 60, Al2O3), 49.48° (intensity 26, Al2O3), 51.98° (intensity 28, MgO ( )), 52° (intensity 24, MgO), 54.2° (intensity 28, MgO), 58.36° (intensity 38, Al2O3), 62.3° (intensity 28, Al2O3), 63.98° (intensity 34, Al2O3), and 64.42° (intensity 28, SiO2), these alterations suggest a reconfiguration of the clay matrix conducive to enhanced adsorption properties, particularly for MB removal[39,45].…”

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confidence: 99%

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Optimized Bentonite Clay Adsorbents for Methylene Blue Removal

Hamad,

Idrus,

Yusuf

et al. 2024

Processes

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This study addresses the urgent need for effective water treatment methods by synthesizing and characterizing activated bentonite clay (ABC) adsorbents to remove methylene blue (MB) from aqueous solutions efficiently. Conventional adsorbents often exhibit limitations in efficiency and regeneration capabilities, necessitating novel approaches to water treatment. The primary objective is synthesizing and characterizing high-quality ABC adsorbents capable of effectively removing MB. The activation process was optimized, and adsorbent performance was evaluated regarding MB removal efficiency and regeneration potential. Various activation dos-ages were investigated, and comprehensive physicochemical characterization was performed using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), BET (Brunauer–Emmett–Teller) analysis, X-ray fluorescence (XRF), thermogravimetric analysis (TGA), and X-ray diffraction (XRD). The synthesized adsorbents demonstrated exceptional MB removal efficiency (99.593%) and impressive adsorption capacity (22.131 mg/g) when activated with 16 M sodium hydroxide. The adsorption process exhibited spontaneity and exothermicity, as validated by Freundlich and second-order kinetic models. Furthermore, the adsorbents showcased successful regeneration and reusability over three cycles, highlighting their potential for long-term application in water treatment. This study significantly advances water treatment by offering a novel approach to MB removal using base-activated bentonite clay (BABC) adsorbents, contributing to the development of sustainable water treatment solutions.

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Section: Batch Experimentationmentioning

confidence: 99%

Section: Batch Experimentationmentioning

confidence: 99%

Section: Batch Experimentationmentioning

confidence: 99%

Section: Batch Experimentationmentioning

confidence: 99%

mentioning

confidence: 99%

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Optimized Bentonite Clay Adsorbents for Methylene Blue Removal

Hamad,

Idrus,

Yusuf

et al. 2024

Processes

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Use of Carica papaya waste as bio-adsorbent for sewage wastewater treatment

Nady,

Abdel-Halim,

Hegazy

et al. 2024

Biomass Conv. Bioref.

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A large amount of wastewater is generated, with the rapid increase in the human population, industrialization, and agricultural development, that leads to a decrease in freshwater amount at an alarming rate. Hence, the current research aims to investigate the effect of the mark of natural bio-sorbent on the improvement of the physicochemical properties of sewage wastewater. The obtained powder was characterized by a Fourier transmission infrared spectrophotometer (FTIR), field emission scanning electron microscopy (SEM), dynamic light scattering (DLS), X-ray diffractometer (XRD), X-ray fluorescence (XRF), Brunauer–Emmett–Teller (BET), and zeta potential. The batch adsorption process was carried out to study the effect of adsorbent dose (0.25–1.5 g/mL) and contact time (0–180 min) at a constant temperature of 23 ± 2 °C and a stirring speed of 150 rpm. After treatment with the obtained powder, the physicochemical properties of wastewater were significantly improved, and 77, 79.2, 95, 37.4, 50, and 38.1% reductions of COD, BOD, TSS, TDS, TN, and TP were reached, respectively, at an adsorbent dose of 0.5 g/500 mL and contact time of 180 min. The adsorption equilibrium data were examined, and the adsorption data was well represented by the Langmuir isotherm model, and the most appropriate kinetic model was pseudo-second order. The current research proves that Carica papaya seeds are considered a potential recyclable adsorbent to improve the physicochemical properties of wastewater.

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