Continuous Fixed-Bed Adsorption of Heavy Metals Using Biodegradable Adsorbent: Modeling and Experimental Study

Renu, null; Agarwal, Madhu; Singh, Kanhaiya; Gupta, Ragini; Dohare, Rajeev Kumar

doi:10.1061/(asce)ee.1943-7870.0001636

Cited by 32 publications

(7 citation statements)

References 60 publications

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“…This model's constants were determined and displayed in table 4, and R 2 values were found to be quite high (> 0.95). This validates the Lagergren model's applicability in the adsorption process, implying that the adsorption process has achieved saturation (Renu et al, 2020). The kinetics of metal ion adsorption using groundnut shell charcoal powder was investigated by graphing qt vs ln t using the Elovich model.…”

Section: Pseudo First Order Modelsupporting

confidence: 66%

Biosorption of heavy metal ions from the aqueous solutions using groundnut shell activated carbon: batch adsorption, kinetic and thermodynamic studies

2022

Global NEST: The International Journal

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<p>Batch adsorption studies of heavy metals were carried out using activated charcoal groundnut shell powder as an adsorbent material. The groundnut shell was collected and synthesized by chemical synthesis to convert it into charcoal form. The prepared adsorbent’s pore size & surface area was analyzed by BET surface analysis using N2 – adsorption & desorption process. XRD techniques analyzed the crystalline structure of charcoal adsorbent, and the functional groups & behaviour of the surface were analyzed through FTIR, SEM, and EDX analysis. The optimum adsorption parameters of pH, temperature, time of contact between adsorbent and adsorbate, groundnut shell dose, and metal ion concentrations were obtained from the batch studies, and the mass transfer mechanism and rate-controlling step was identified by isotherm and kinetic studies. Thermodynamic studies confirm the endothermic nature of the adsorption process between adsorbent and adsorbate, and the spent metal ions have been recovered using concentrated sulfuric acid.</p>

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Section: Pseudo First Order Modelsupporting

confidence: 66%

Biosorption of heavy metal ions from the aqueous solutions using groundnut shell activated carbon: batch adsorption, kinetic and thermodynamic studies

2022

Global NEST: The International Journal

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“…By referring the curves, up to optimum point the rate of desorption has been increased gradually and after that it starts decreasing for all three eluents of 0.1, 0.2 & 0.3N (Renu et al, 2020). Similar trend also followed for lead and zinc solutions.…”

Section: Desorption and Regenerationsupporting

confidence: 57%

Investigation of Mechanisam of Metal Ion Adsorption From Aqueous Solutions Using Prosopis Julyflora Roots: Batch and Fixed Bed Column Studies

2022

Global NEST: The International Journal

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<p>Adsorption of heavy metal ions (Cr, Pb & Zn) using prosopis julyflora roots has been investigated by batch adsorption and fixed bed column process. The various properties of adsorbent were analysed and the FT-IR spectra & SEM studies of prosopis julyflora powder, before and after adsorption of metal ions also examined. From the batch adsorption study, maximum amount of metal ion adsorption was found to be 87.12% for Cr (VI), 92.28% for Pb (II) and 95.62% for Zn (II) metal ions. The Freundlich isotherm model fitted well than the Langmuir adsorption isotherm with high regression values. From the column study, optimum bed height of 5 cm, flow rate of 5 mL/min and metal ion concentration of 100 mg/L was obtained by breakthrough analysis. The fixed bed column study followed Thomas & Yoon-Nelson model plots with good correlations and maximum desorption rate was achieved by adding 0.3M of concentrated H2SO4.</p>

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“…The adsorption experiment was carried out to optimize the pH, metal ions concentration, dose, and experimental time, which are shown in bents surface at a specific pH value Renu et al, 2020). At higher pH due to the conflicting of hydrogen positive (H + ) ions with copper and cadmium ions for active sites, the reduced the performance (Ni et al, 2019).…”

Section: Optimization Of Parametersmentioning

confidence: 99%

Interparticle diffusion and thermodynamic modeling studies for the removal of heavy metals using mixed adsorbents in industrial effluents

Tadepalli

Murthy

Sahu

2022

Environmental Quality Mgmt

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Pollution of water, air, and soil by industrial effluents is a major problem nowadays. A variety of contaminants are too responsible for changing the physicochemical properties of the receiving body. There are practical treatment solutions available to clean up contaminants from various resources. The term "adsorption" refers to one of them.The purpose of the research work is to remove heavy metals from industrial effluent.Mixed adsorbents prepared from activated charcoal and bone charcoals were used to remove the copper and cadmium ions. The experiment carried out in a batch operation and modeling of these data for intraparticle diffusion and thermodynamic calculations were reported in this research work. At optimum operating condition pH 6; metal ion concentration 50 mg/L; dose 5 g/L; agitation 180 rpm and temperature 40 • C maximum 99.41% copper ions and 88.12% cadmium ion removal was achieved. Cadmium ions were well fitted in the thermodynamic model compared to copper ions, as demonstrated by the higher correlation coefficient R 2 (0.9824) value. Intra particle diffusion demonstrated that film diffusion was a rate-limiting step at the start of the reaction, while microporous intraparticle diffusion was the rate-determining phase later on. A Fourier transformation infrared spectroscopy, X-ray diffraction, and scanning electron micrography analysis confirmed the suitability of mixed adsorbents for the removal of cadmium and copper metal ions.

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Continuous Fixed-Bed Adsorption of Heavy Metals Using Biodegradable Adsorbent: Modeling and Experimental Study

Cited by 32 publications

References 60 publications

Biosorption of heavy metal ions from the aqueous solutions using groundnut shell activated carbon: batch adsorption, kinetic and thermodynamic studies

Biosorption of heavy metal ions from the aqueous solutions using groundnut shell activated carbon: batch adsorption, kinetic and thermodynamic studies

Investigation of Mechanisam of Metal Ion Adsorption From Aqueous Solutions Using Prosopis Julyflora Roots: Batch and Fixed Bed Column Studies

Interparticle diffusion and thermodynamic modeling studies for the removal of heavy metals using mixed adsorbents in industrial effluents

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