Biosorption of a reactive textile dye from aqueous solutions utilizing an agro-waste

Akar, Sibel Tunali; Akar, Tamer; Özcan, Adnan; Kaynak, Zerrin

doi:10.1016/j.desal.2008.09.012

Cited by 152 publications

(67 citation statements)

References 40 publications

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“…Furthermore, at higher contents of the adsorbent, the adsorption capacity declined, which is due to the overlap of adsorptive sites on the adsorbent's surface. Of course, it can be also attributed to the decreasing impact of the slope between dye molecule and adsorbent concentrations (26). The results of the current study were in close absorbance with those of the Yousefi N et al (24).…”

Section: Effect Of Graphene and Active Carbon Concentrationsupporting

confidence: 77%

Comparison Between the Performance of Activated Carbon and Graphene in Removal of Reactive Red 198

Samarghandi

Poormohammadi

Shanesaz

et al. 2017

Avicenna J Environ Health Eng

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The current study aimed at comparing the performances of activated carbon and graphene in the removal of reactive red 198. The experiments were conducted in a batch reactor and the effects of some operational parameters including initial dye concentration, pH, contact time, and different doses of activated carbon and graphene on the removal efficiency of dye were investigated. The results showed that the adsorption efficiency was affected by initial dye concentration. In general, with increasing contact time up to 180 minutes, the removal efficiency increased significantly. The removal efficiency of reactive red 198 increased with increasing contact time, and after 60 minutes of contact time, adsorption phase reached the equilibrium. When activated carbon was used, the maximum removal efficiency happened at pH 3. At this pH value, reactive red 198 was removed completely (100%) after 120 minutes, whereas the minimum efficiency was observed at pH 10. A similar trend was also observed for graphene as an adsorbent. Moreover, the removal efficiency of the dye by both adsorbents increased with the increase of the adsorbent dosage. The experimental data showed that the adsorption of reactive red198 on both active carbon and graphene fitted well into the second-order kinetic model. Active carbon and graphene fitted well Langmuir 1 model. According to the results, graphene acts as suitable adsorbent and can be applied in treating several industrial effluents and contaminated water in greater scales. The main upside of grapheme, in comparison with activated carbon, is that it reaches the equilibrium in a shorter time. Further, grapheme adsorbed the dye nearly completely (98% to 100%).

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Section: Effect Of Graphene and Active Carbon Concentrationsupporting

confidence: 77%

Comparison Between the Performance of Activated Carbon and Graphene in Removal of Reactive Red 198

Samarghandi

Poormohammadi

Shanesaz

et al. 2017

Avicenna J Environ Health Eng

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“…As the biosorbent dosage was increased from 2 to 10 g, the biosorption capacity reduced from 4.35 to 0.929 mg/g (Figure 5a). This may be due to the decrease in total biosorption surface area available to 2,4-DNP, resulting from overlap or aggregation of biosorption sites [51,52]. Similar observations have been reported [18,53,54].…”

Section: Effect Of Biosorbent Dosagesupporting

confidence: 74%

Chemically treated kola nut pod as low-cost natural adsorbent for the removal of 2,4-dinitrophenol from synthetic wastewater: batch equilibrium, kinetic, and thermodynamic modelling studies

Agarry¹,

Ogunleye²

2014

Turkish J Eng Env Sci

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Abstract:The feasibility of using chemically treated kola nut pod to remove 2,4-dinitrophenol from its aqueous solutions under batch mode was investigated. The results showed that biosorption of 2,4-dinitrophenol was dependent on initial concentration, contact time, pH, biosorbent particle size, biosorbent dosage, and temperature. The batch equilibrium biosorption data were analyzed by 2 two-parameter (Langmuir and Freundlich) and 2 three-parameter (Redlich-Peterson and Sips) adsorption isotherm models using linear and nonlinear regression methods. The Sips isotherm equation employing the parameter sets derived using the HYBRID/MPSD/ARE errors provided the overall best model to describe the biosorption data of the 2,4-dinitrophenol-kola nut pod system. The maximum monolayer biosorption capacity ( Qmax) was obtained to be 32.26 mg/g with linear regression and 30.10 mg/g with nonlinear regression. The biosorption kinetic data were fitted to 6 biosorption kinetic models using the linear regression method. The 6 kinetic models fitted well to the biosorption kinetic data; however, the pseudo-first-order kinetic model gave the best fit and the biosorption mechanism was controlled by film diffusion. The thermodynamic analysis indicates that the biosorption process was spontaneous, feasible, exothermic, and physical in nature. Thus, chemically modified kola nut pod has potential for application as an effective bioadsorbent for 2,4-dinitrophenol removal from wastewater.

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“…Although the percentage removal of CR dye increased with increase of adsorbent dosage, the equilibrium adsorption capacity decreased with increase of adsorbent dosage (figure not shown). This may be due to aggregation of the adsorption sites which limits the availability of all the active sites during adsorption process [17,26].Similar trend has been reported for the adsorption of CR dye by Roots of Eichhornia crassipe [27]. …”

Section: Effect Of Adsorbent Dosagesupporting

confidence: 68%

Adsorption of Congo Red Dye from Aqueous Solution Using Agricultural Waste

Conrad¹,

Nnaemeka²,

Uchechi³

et al. 2016

IOSR

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Biosorption of a reactive textile dye from aqueous solutions utilizing an agro-waste

Cited by 152 publications

References 40 publications

Comparison Between the Performance of Activated Carbon and Graphene in Removal of Reactive Red 198

Comparison Between the Performance of Activated Carbon and Graphene in Removal of Reactive Red 198

Chemically treated kola nut pod as low-cost natural adsorbent for the removal of 2,4-dinitrophenol from synthetic wastewater: batch equilibrium, kinetic, and thermodynamic modelling studies

Adsorption of Congo Red Dye from Aqueous Solution Using Agricultural Waste

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