Evaluation of the Adsorption Kinetics and Equilibrium for the Potential Removal of Congo Red Dye From Aqueous Medium by Using a Biosorbent

Patil, Paradip Rajaram; Marathe, Yogesh V.; Shrivastava, V. S.

doi:10.9734/bjast/2015/12590

Cited by 4 publications

(2 citation statements)

References 16 publications

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“…In the second stage, MB diffused into the interior of BC/g-C 3 N 4 . Both stages of the fitted lines did not pass the zero point, indicating that intraparticle diffusion was not the only rate control step [16]. The adsorption rate may also be affected by out-diffusion (surface adsorption and liquid film diffusion).…”

Section: Adsorption Kineticsmentioning

confidence: 97%

Preparation and Adsorption Properties of Biochar/g-C₃N₄ Composites for Methylene Blue in Aqueous Solution

2019

Journal of Nanomaterials

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Using straw and urea as raw materials, biochar (BC) and g-C3N4 were prepared by oxygen-free pyrolysis at 300°C and 550°C. BC/g-C3N4 was prepared by loading different amounts of g-C3N4 onto the surface of biochar and characterized by SEM and FT-IR. The adsorption effect on methylene blue (MB) was investigated from the aspects of dosage and pH. The studies of adsorption equilibrium isotherms and the kinetic and the thermodynamic parameters on the BC/g-C3N4 adsorbents are discussed. The results showed that BC/g-C3N4 0.16 g/L with a doping ratio of 1 : 3 was added to the MB solution with an initial concentration of 50 mg/L and pH=11. The adsorption rate and adsorption amount were 96.72% and 302.25 mg/g, respectively. The adsorption process included surface adsorption and intraparticle diffusion, which conformed to the pseudo-second-order kinetic model and Langmuir-Freundlich model. Thermodynamic parameters (ΔG0<0, ΔH0>0, and ΔS0>0) showed that the adsorption reaction is spontaneous, which positively correlated with temperature.

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Section: Adsorption Kineticsmentioning

confidence: 97%

Preparation and Adsorption Properties of Biochar/g-C₃N₄ Composites for Methylene Blue in Aqueous Solution

2019

Journal of Nanomaterials

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“…The adsorption method is a physical method that is simple to use and yields a strong purification effect, etc. However, the adsorbent has a high cost and often cannot be reused (Patil et al 2015).…”

Section: Introductionmentioning

confidence: 99%

The adsorption of lemon yellow dye using cationic cellulose fibers from rice straw as a sustainable biosorbent in aqueous media

Zhang

Zhu

et al. 2021

BioRes

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A biosorbent was prepared from the cellulose fibers found in rice straw through cationic modification. The effects of the dosage, pH, contact time, and initial concentration of lemon yellow dye were explored. The static adsorption results showed that cationic modification drastically improved the adsorption capacity of straw cellulose fiber. The maximum equilibrium adsorption capacity value was 137.6 mg/g and the highest removal reached 99%. The pseudo-second-order kinetic model was a good fit for the adsorption process, together with the Langmuir isotherm model. The adsorption reaction was spontaneous, and the adsorption process was an exothermic reaction, which was shown by the thermodynamic model. As the adsorption time became longer, the effluent concentration became larger until reaching equilibrium. The time was 420 min. After desorption using a dilute NaOH solution, the maximum adsorption capacity was still 36.1 mg/g and the maximum removal still reached 36.2%. The parameters calculated from the Yoon-Nelson model have a good fit with the experimental data. In short, cationic straw cellulose fiber is an effective and easy to prepare biosorbent. This work offers a new method for dye wastewater purification and solves the effective utilization of rice straw resources.

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Adsorption isotherms and kinetics of acid violet 48 onto sludge-straw adsorbent

Ren¹,

Lai²,

Sun³

et al. 2017

Desalination and Water Treatment

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Evaluation of the Adsorption Kinetics and Equilibrium for the Potential Removal of Congo Red Dye From Aqueous Medium by Using a Biosorbent

Cited by 4 publications

References 16 publications

Preparation and Adsorption Properties of Biochar/g-C₃N₄ Composites for Methylene Blue in Aqueous Solution

Preparation and Adsorption Properties of Biochar/g-C₃N₄ Composites for Methylene Blue in Aqueous Solution

The adsorption of lemon yellow dye using cationic cellulose fibers from rice straw as a sustainable biosorbent in aqueous media

Adsorption isotherms and kinetics of acid violet 48 onto sludge-straw adsorbent

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Evaluation of the Adsorption Kinetics and Equilibrium for the Potential Removal of Congo Red Dye From Aqueous Medium by Using a Biosorbent

Cited by 4 publications

References 16 publications

Preparation and Adsorption Properties of Biochar/g-C3N4 Composites for Methylene Blue in Aqueous Solution

Preparation and Adsorption Properties of Biochar/g-C3N4 Composites for Methylene Blue in Aqueous Solution

The adsorption of lemon yellow dye using cationic cellulose fibers from rice straw as a sustainable biosorbent in aqueous media

Adsorption isotherms and kinetics of acid violet 48 onto sludge-straw adsorbent

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Product

Resources

About

Preparation and Adsorption Properties of Biochar/g-C₃N₄ Composites for Methylene Blue in Aqueous Solution

Preparation and Adsorption Properties of Biochar/g-C₃N₄ Composites for Methylene Blue in Aqueous Solution