Biosorption of Reactive Black 5 from aqueous solutions by chitosan: Column studies

Barron-Zambrano, Jesus; Szygula, Agata; Ruiz, Magda; Sastre, Ana Marı́a; Guibal, Eric

doi:10.1016/j.jenvman.2010.07.033

Cited by 48 publications

(14 citation statements)

References 43 publications

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“…These results demonstrate that the change of concentration gradient affects the saturation rate and breakthrough time. These results are similar to those found by other researchers in adsorption systems in columns for different synthetic dyes and using different sorbent materials .…”

Section: Resultssupporting

confidence: 92%

Adsorption of malachite green from aqueous solution by naoh‐modified rice husk: Fixed‐bed column studies

Chowdhury

Das

2012

Env Prog and Sustain Energy

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In this work, a continuous fixed‐bed adsorption study was carried out by using NaOH‐modified rice husk (NMRH) as an adsorbent for the removal of malachite green (MG) from its aqueous solution. The influence of important process parameters such as initial solution pH, influent concentration of MG, feed flow rate, and bed height on breakthrough curve and breakthrough time was investigated. The breakthrough time increased with decreasing flow rate. The same effect was noted when the bed height was increased. On the other hand, the breakthrough time decreased as the inlet dye concentration was increased keeping the flow rate and bed height constant. Four different kinetic models, namely Adams–Bohart, bed depth service time bed depth service time (BDST), Thomas model, and Yoon–Nelson model were fitted to the experimental data. The Thomas model showed best fit at all experimental conditions studied. Overall, this study showed that NMRH has potential for technological application as adsorbent in dye wastewater treatment. © 2012 American Institute of Chemical Engineers Environ Prog, 32: 633–639, 2013

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Section: Resultssupporting

confidence: 92%

Adsorption of malachite green from aqueous solution by naoh‐modified rice husk: Fixed‐bed column studies

Chowdhury

Das

2012

Env Prog and Sustain Energy

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“…All the studied bed depths gave a similar shaped breakthrough curve, with a slightly flatter slope as the bed depth increased, suggesting that the adsorption rates were not considerably different among the bed depths [24]. An increased bed depth (or sorbent mass) provided a greater surface area for dye adsorption and increased the contact time between the bed and the dye [16]. As expected, the V b and V E values increased with a higher bed depth in this study.…”

Section: Effect Of Bed Depthsupporting

confidence: 77%

“…Further investigation in a continuous flow system is necessary for industry applications [16,17]. Since small-scale column experiments have been reported to give good predictions for dye removal from wastewater [18], they should be conducted before carrying out any high-cost, pilot-scale, column experiments.…”

Section: Introductionmentioning

confidence: 99%

Analysis and modeling of column operations on reactive dye removal onto alkaline-treated biomass fly ash

Pengthamkeerati

Satapanajaru

2015

Desalination and Water Treatment

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A B S T R A C TThe adsorption characteristics of Reactive Black 5 (RB5) dye on alkaline-treated biomass fly ash (TFA) were investigated in aqueous solutions in a fixed-bed column. The breakthrough curves increased with decreasing initial dye concentration and the flow rate, and with increasing bed depth. In this column study, the optimum flow rate and bed depth were 5 ml min −1 and 10 cm, respectively. The Thomas model provided a good prediction of the breakthrough curve of RB5 removal by the TFA. The maximum adsorption capacity from the column study was in accordance with the equilibrium capacity in a batch experiment. The bed-depth service time model was used to describe the effect of bed depth on the breakthrough curves, and it revealed a good fit with the experimental data. These results suggest that the fixed-bed TFA is suitable for treating dye wastewater.

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“…This was also confirmed by Barron-Zabrana et al [32], who were examining adsorption capacity of dyes onto chitosan. They achieved the highest degree of adsorption capacity use (at around 40%) for dye concentration of 50 mg/l and flow intensity 0.5 m/h [33]. Results obtained in our study enable concluding that the highest effectiveness of metals removal in the process of adsorption onto immobilized activated sludge was achieved at higher concentrations of the influent.…”

Section: Degree Of Adsorption Capacity Usesupporting

confidence: 55%

Effect of conditions of air-lift type reactor work on cadmium adsorption

Filipkowska

Szymczyk

Kuczajowska-Zadrożna

et al. 2015

Korean J. Chem. Eng.

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We investigated cadmium sorption by activated sludge immobilized in 1.5% sodium alginate with 0.5% polyvinyl alcohol. Experiments were conducted in an air-lift type reactor at the constant concentration of biosorbent reaching 5 d.m./dm 3 , at three flow rates: 0.1, 0.25 and 0.5 V/h, and at three concentrations of the inflowing cadmium solution: 10, 25 and 50 mg/dm 3 . Analyses determined adsorption capacity of activated sludge immobilized in alginate as well as reactor's work time depending on flow rate and initial concentration of the solution. Results achieved were described with the use of Thomas model. The highest adsorption capacity of the sorbent (determined from the Thomas model), i.e., 200.2 mg/g d.m. was obtained at inflowing solution concentration of 50 mg/dm 3 and flow rate of 0.1 V/h, whereas the lowest one reached 53.69 mg/g d.m. at the respective values of 10 mg/dm 3 and 0.1 V/h. Analyses were also carried out to determine the degree of biosorbent adsorption capacity utilization at the assumed effectiveness of cadmium removal -at the breakthrough point (C=0.05*C 0 ) and at adsorption capacity depletion point (C− 0.9*C 0 ). The study demonstrated that the effectiveness of adsorption capacity utilization was influenced by both the concentration and flow rate of the inflowing solution. The highest degree of sorbent capacity utilization was noted at inflowing solution concentration of 50 mg/dm 3 and flow rate of 0.1 V/h, whereas the lowest one at the respective values of 10 mg/dm 3 and 0.1 V/h. The course of the process under dynamic conditions was evaluated using coefficients of tangent inclination -a, at point C/C 0 =½. A distinct tendency was demonstrated in changes of tangent slope a as affected by the initial concentration of cadmium and flow rate of the solution. The highest values of a coefficient were achieved at the flow rate of 0.1 V/h and initial cadmium concentration of 50 mg/dm 3 .

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Biosorption of Reactive Black 5 from aqueous solutions by chitosan: Column studies

Cited by 48 publications

References 43 publications

Adsorption of malachite green from aqueous solution by naoh‐modified rice husk: Fixed‐bed column studies

Adsorption of malachite green from aqueous solution by naoh‐modified rice husk: Fixed‐bed column studies

Analysis and modeling of column operations on reactive dye removal onto alkaline-treated biomass fly ash

Effect of conditions of air-lift type reactor work on cadmium adsorption

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