Adsorption of chromium (VI) by strong alkaline anion exchange fiber in a fixed-bed column: Experiments and models fitting and evaluating

Wang, Wenqing; Li, Mingyu; Zeng, Qingxuan

doi:10.1016/j.seppur.2015.05.022

Cited by 85 publications

(28 citation statements)

References 43 publications

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“…Conversely, the values of N0 decrease when there is an increase in bed mass, whereas there is an increase in the value of N0 with initial concentration and flow rate increasing. These results confirm that the sorption kinetics is surmounted by external mass transfer (Bhaumik et al, 2013;Wang et al, 2015).…”

Section: Bohart-adams Modelsupporting

confidence: 82%

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Preparation and application of silver oxide/sawdust nanocomposite for Chromium(VI) ion removal from aqueous solutions using column system

2017

Global NEST Journal

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This study describes the removal of Cr (VI) ions from aqueous solutions using silver oxide/sawdust nanocomposite (Ag2O/SD NC) that was prepared using the chemical precipitation method. Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FT-IR) techniques were used for characterization of Ag2O/SD NC. The effect of various parameters such as feed solution pH (2, 6, and 10), influent concentration of Chromium (VI) (25-100 mg/L), flow rate (1-5 mL/min) and bed depth (4-12 cm) on breakthrough curves (BTC) were investigated. Three wellknown column adsorption kinetics models including Thomas, Adams-Bohart and Bed Depth Service Time (BDST) models were applied to fitting the column experimental data. Based on Thomas model, the equilibrium adsorption reached 13.41 mg/g when a Cr (VI) polluted solution with influent concentration of 25 mg/L Cr (VI) passed through the column with a flow rate of 2 mL/min. Desorption studies reveal that recovery of uploaded Cr (VI) from the Ag2O/SD NC adsorbent or exhausted column regeneration can readily be achieved using a dilute solution of NaOH (0.01 M) as eluent. This study indicated that the Ag2O/SD NC can be used as an effective, efficient and environmentally friendly adsorbent for the removal of Cr (VI) ions from water resources.

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Section: Bohart-adams Modelsupporting

confidence: 82%

“…Generally, it is descriptive to analyze the initial part of a breakthrough curve (Ct/C0 < 0.5) (Bhaumik et al, 2013;Wang et al, 2015). The expression is as follows:…”

Section: Bohart-adams Modelmentioning

confidence: 99%

Preparation and application of silver oxide/sawdust nanocomposite for Chromium(VI) ion removal from aqueous solutions using column system

2017

Global NEST Journal

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“…Considering that there is light metals release from the surface of the residue during the biosorption process, and that this release may influence the amount of Zn ions removed, these results indicate greater competition between zinc ions and the light cations for the same binding sites. The same behavior was previously reported …”

Section: Resultsmentioning

confidence: 99%

“…The same behavior was previously reported. [37][38][39][40] Evaluating zinc removal on a fixed-bed using specifically multimetal binding biosorbent (MMBB), Abdolali et al 41 observed a maximum biosorption capacity of 0.539 mmol g -1 . The authors used the following experimental conditions: 0.3 mmol L -1 (initial concentration), 10 mL min -1 (flow rate) and bed length of 31 cm.…”

Section: Effect Of Inlet Zn(ii) Concentrationmentioning

confidence: 99%

Dealginated seaweed waste for Zn(II) continuous removal from aqueous solution on fixed‐bed column

Cardoso

Costa

Silva

et al. 2017

J of Chemical Tech & Biotech

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BACKGROUND The alginate extraction residue from Brazilian Sargassum filipendula was employed as biosorbent for Zn(II) removal through a fixed‐bed column in order to explore its adsorptive properties and to establish a new use for this waste. RESULTS The best operating conditions were 0.5 mL min‐1 and 1.0 mmol L‐1 (inlet concentration), providing lower mass transfer zone and higher uptake. Elution percentages of 52 and 73% were obtained for the first and second desorption cycles, respectively, using CaCl2 as eluent. The Yan et al. model was more representative of the experimental data. Characterization revealed that ion exchange is involved between zinc ions and light metals (Ca, Na, K and Mg). A decrease was observed in real and apparent densities of biomass, with an increase in particle porosity of the residue after process. CONCLUSION The study revealed that this biomass has potential for Zn removal from aqueous solution, encouraging its application as a biosorbent in future studies involving multicomponent systems. © 2017 Society of Chemical Industry

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“…Este modelo se puede expresar con la ayuda de la cinética de reacción reversible de segundo orden donde no se produce dispersión axial, donde K Th es la constante de Thomas en mL.min -1 .mg -1 , Q 0 la concentración máxima de soluto en fase sólida en mg/g, X la cantidad de adsorbente en la columna dada en g, y Q es velocidad de flujo en mL.min -1 [32,33].…”

Section: Pruebas De Adsorción En Sistema Lecho Fijounclassified

Adsorción competitiva de plomo y niquel sobre cáscara de ñame y bagazo de palma en sistema continuo

TOVAR¹,

MERCADO²,

MOSCOTE³

et al. 2018

BSAA

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Adsorption of chromium (VI) by strong alkaline anion exchange fiber in a fixed-bed column: Experiments and models fitting and evaluating

Cited by 85 publications

References 43 publications

Preparation and application of silver oxide/sawdust nanocomposite for Chromium(VI) ion removal from aqueous solutions using column system

Preparation and application of silver oxide/sawdust nanocomposite for Chromium(VI) ion removal from aqueous solutions using column system

Dealginated seaweed waste for Zn(II) continuous removal from aqueous solution on fixed‐bed column

Adsorción competitiva de plomo y niquel sobre cáscara de ñame y bagazo de palma en sistema continuo

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