Kinetic and equilibrium studies on adsorption of Reactive Blue 19 dye from aqueous solutions by nanohydroxyapatite adsorbent

Ciobanu, Gabriela; Barna, Simona; Harja, Maria

doi:10.1515/aep-2016-0014

Cited by 45 publications

(25 citation statements)

References 27 publications

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“…Thus, the experimental and modeling results indicated that T. conoides-derived biochar could be a practical and valuable sorbent to reactive dye-bearing wastewater. Magnetite/Graphene oxide nanocomposite (prepared from coprecipitation method) 62.5 [41] Nanohydroxyapatite (prepared from wet chemical precipitation method) 90.1 [42] Pineapple (Ananas comosus) leaf powder 42.0 [40] Prosopis juliflora-derived biochar (prepared from Peroxide-assisted microwave pyrolysis)…”

Section: Discussionmentioning

confidence: 99%

Characterization and evaluation of reactive dye adsorption onto Biochar Derived from Turbinaria conoides Biomass

Vijayaraghavan

Thirunavukkarasu

2019

Env Prog and Sustain Energy

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Biochar, produced from brown seaweed Turbinaria conoides through microwave assisted pyrolysis, was employed as a sorbent for the remediation of Remazol brilliant blue R (RBB). Pyrolysis experiments were conducted at different processing conditions and the resulting products of microwave pyrolysis (biochar, bio‐oil, and gas) at each condition were quantified. The optimum yield of 27.3 wt% for the biochar was achieved by applying pyrolysis conditions including power of 280 W and feedstock ratio of 10:4 as seaweed: activated carbon. The biochar was characterized using Fourier transform infrared spectroscopy, energy dispersive X‐ray analysis and scanning electron microscope. The results indicated that pyrolysis increased roughness and number of pores on the biochar surface thereby enhanced the sorption potential of seaweed. Adsorption experiments revealed that optimum RBB biosorption occurred at pH 2 for seaweed‐derived biochar with maximum RBB sorption capacity of 85.3 mg/g. Application of different isotherm models (Freundlich, Langmuir, and Toth) indicated that the three‐parameter Toth model resulted in improved prediction of isotherm data with less % error, high correlation coefficient, less chi‐square and root mean square error values. The experimental kinetics data analyzed using different models highlighted that the pseudo‐second order kinetic model produced superior description of the experimental data. The elution experiments carried out using various elutants (0.1 M HNO3, HCl, H2SO4, NaOH, Na2CO3, and EDTA) indicated that NaOH performed better in releasing RBB from dye‐bounded biochar with elution efficiency of 99.5%. The regenerated biochar sample was restored and successfully employed for three sorption‐elution cycles. © 2019 American Institute of Chemical Engineers Environ Prog, 38:e13143, 2019

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Section: Discussionmentioning

confidence: 99%

Characterization and evaluation of reactive dye adsorption onto Biochar Derived from Turbinaria conoides Biomass

Vijayaraghavan

Thirunavukkarasu

2019

Env Prog and Sustain Energy

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“…From these results, it can be concluded that equilibrium was reached in several minutes, and the maximum amount of sorbed dye at native pH was 838.56 mg g −1 . Electrochemically synthesized sorbent (ECBBN) exhibits much higher sorption capacity for RB19 than other sorbents, especially than inorganic sorbents synthesized by conventional methods, such as precipitation, coprecipitation and hydrothermal methods, reported in previous studies (Table 2) [20][21][22][23][24][25][26][27]. Another advantage of the electrochemically synthesized sorbent is much lower sorption equilibrium time, which makes the sorption process considerably faster.…”

Section: The Ability Of Ecbbn To Remove Rb19mentioning

confidence: 94%

“…There are many studies of photocatalytic degradation of RB19 by diferent bismuth compounds used as photocatalyst [14][15][16][17][18][19]. Relative to the forego-ing techniques adsorption is considered to be simple, highly eicient and relatively inexpensive, and in a lot of studies, various organic and inorganic compounds are successfully used for removal of RB19 dye [9,[20][21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical synthesis and characterization of basic bismuth nitrate [Bi6O5(OH)3](NO3)5·2H2O: a potential highly efficient sorbent for textile reactive dye removal

et al. 2019

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A new method of synthesis was developed for the preparation of basic bismuth nitrate [Bi 6 O 5 (OH) 3 ](NO 3) 5 •2H 2 O (ECBBN). Electrochemical synthesis of the material was carried out by galvanostatic electrodeposition from an acidic Bi(III) solution on a Ti substrate and further thermal treatment in air at 200 °C. Characterization of ECBBN was conducted by employing SEM-EDX, N 2 adsorption, XRD and FTIR, and its pI was also determined. The analyses showed that the material obtained was pure [Bi 6 O 5 (OH) 3 ](NO 3) 5 •2H 2 O. Morphologically, ECBBN aggregates were composed of crystals, some smaller than 50 nm. Electrochemically synthesized sorbent (ECBBN) was used for the removal of the textile dye Reactive Blue 19 (RB19) from deionized water and model solutions of polluted river water, and it showed considerably superior sorption performance compared to other inorganic sorbents synthesized by conventional methods reported in the literature. A kinetic study suggests that the sorption process is both under reaction and difusion control. Equilibration of the sorption process was attained in several minutes, i.e. the sorption process is very fast. The sorption equilibrium data were well interpreted by the Langmuir, Redlich-Peterson and Brouers-Sotolongo isotherm. Using Langmuir isotherm, the maximum sorption capacity of ECBBN was reached at pH 2 and was 1049.19 mg g −1 .

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“…Similarly, optimal adsorption efficiency was determined by varying bed height (7.4 cm, 11.1 cm, 14.8 cm,18.5 cm, and 22.2 cm), pH (4 to 10), alginate:chitin ratio (1:2,1:3, 1:4, 1:5, 1:6, 1:7, 1:8, and 1:9), and dye concentration (20mg l -1 to 100 mg l -1 ). Removal efficiency of chitin is: …where C o is the initial concentration of methylene blue and C t is the solution concentration after adsorption at any time [6].…”

Section: Optimization Of Dye Adsorptionmentioning

confidence: 99%

Chitin Beads from Peneaus sp. Shells as a Biosorbent for Methylene Blue Dye Removal

Mabel¹,

Sundararaman²,

Parthasarathy³

et al. 2019

Pol. J. Environ. Stud.

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The adsorption potential of chitin, a polysaccharide found in the exoskeleton of shrimp, was evaluated using methylene blue cationic dye. Batch adsorption studies were done using a column by optimized bed height of 22.2 cm and retention time of 90 min. The alginate:chitin ratio was taken as 1:07 with 80 mgl-1initial dye concentration, and pH was maintained at 8. There was 90% adsorption of dye. Langmuir and Freundlich isotherms were studied along with the adsorption kinetics. The plots indicated that the data fitted Langmuir isotherm. The R 2 is greater for pseudo second-order kinetics and Weber and Morris' model on intra particle diffusion best fit this adsorption by chitin.

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Kinetic and equilibrium studies on adsorption of Reactive Blue 19 dye from aqueous solutions by nanohydroxyapatite adsorbent

Cited by 45 publications

References 27 publications

Characterization and evaluation of reactive dye adsorption onto Biochar Derived from Turbinaria conoides Biomass

Characterization and evaluation of reactive dye adsorption onto Biochar Derived from Turbinaria conoides Biomass

Electrochemical synthesis and characterization of basic bismuth nitrate [Bi6O5(OH)3](NO3)5·2H2O: a potential highly efficient sorbent for textile reactive dye removal

Chitin Beads from Peneaus sp. Shells as a Biosorbent for Methylene Blue Dye Removal

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