Biosorption of reactive dye using acid-treated rice husk: Factorial design analysis

Venkatachalam, P.; Krithika, V.; Madhuram, R.; Srivastava, S.N.

doi:10.1016/j.jhazmat.2006.08.040

Cited by 166 publications

(102 citation statements)

References 31 publications

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“…Values of resulting parameters and regression coefficients (R 2 ) are listed in Tables 4 and 5. The R 2 value for the Freundlich isotherm was 0.9990, which is higher than the values obtained from the Langmuir and Temkin isotherm models. The experimental data fit very well to this isotherm model, and indicates that fluoride adsorption occurs on heterogeneous surfaces, which is similar to the conclusion reached for nZVI [38][39][40].…”

Section: Adsorption Isothermssupporting

confidence: 84%

Response Surface Methodology for Adsorption of Fluoride Ion Using Nanoparticle of Zero Valent Iron from Aqueous Solution

Fakhri¹

2013

J Chem Eng Process Technol

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This study is removal of fluoride ion from aqueous solution by nano zero valent iron (nZVI). Effects of the factor variables (temperature, nZVI dose and pH) and their interactions on adsorption of fluoride ion were investigated by response surface methodology (RSM) based on Box-Behnken design (BBD). Optimized values of temperature, nZVI dose and pH for fluoride sorption were found as 313K, 0.5 g, and 4, respectively. The effect of initial fluoride concentration on the adsorption amount was investigated by a batch experiment. For study the fluoride removal mechanism, various adsorption isotherms such as Langmuir, Freundlich and Temkin were fitted. The results showed that the Freundlich isotherm gave high fit for fluoride adsorption. The time of adsorption reaction was rapid and subordinated pseudo-second-order kinetics. The values of thermodynamic parameters indicated that adsorption was spontaneous and endothermic in nature. The nano zero valent iron (nZVI) could be used as a potential adsorbent for fluoride ion containing aqueous solution.

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Section: Adsorption Isothermssupporting

confidence: 84%

Response Surface Methodology for Adsorption of Fluoride Ion Using Nanoparticle of Zero Valent Iron from Aqueous Solution

Fakhri¹

2013

J Chem Eng Process Technol

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“…To remove these toxic and stable dyes, numerous researchers have made great efforts to explore various absorbers in the past few decades, including active carbon, 1 fly ash, 2,3 zeolite, 4,5 montmorillonite, 6,7 graphene, 8,9 and agricultural wastes. [10][11][12] However, all these methods have limitations due to the complex regeneration process and high cost. 13 Considering this scenario, it is indispensible to develop the new materials for the removal of dyes.…”

Section: Introductionmentioning

confidence: 99%

Calcined Mg-Fe layered double hydroxide as an absorber for the removal of methyl orange

Peng

Dai

et al. 2015

AIP Advances

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In this work, methyl orange (MO) was effectively removed from aqueous solution with the calcined product of hydrothermal synthesized Mg/Fe layered double hydroxide (Mg/Fe-LDH). The structure, composition, morphology and textural properties of the Mg/Fe-LDH before and after adsorption were characterized by X-ray diffraction, Fourier transformation infrared spectroscopy, transmission electron microscopy, nitrogen adsorption apparatus and X-ray photoelectron spectroscopy. It was confirmed that MO had been absorbed by calcined Mg/Fe-LDH which had strong interactions with MO. The adsorption of MO onto the Mg/Fe-LDH was systematically investigated by batch tests. The adsorption capacity of the Mg/Fe-LDH toward MO was found to be 194.9 mg • g−1. Adsorption kinetics and isotherm studies revealed that the adsorption of MO onto Mg/Fe-LDH was a spontaneous and endothermic process. These results indicate that Mg/Fe-LDH is a promising material for the removal of MO.

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“…The biomass was treated with 2.0 mol/L nitric acid for a period of 1 h and it was washed with distilled water and finally washed Stem was dried at 105• in oven (15). The resultant biomass was subsequently used in sorption experiments.…”

Section: Preparation Of Adsorbentmentioning

confidence: 99%

“…Many physical and chemical treatment methods including adsorption, coagulation, precipitation, filtration, electrodialysis, membrane separation and oxidation have been used for the treatment of dyecontaining effluents (14). Although the mentioned methods have been widely used, however they have many limitations to use such as high cost, formation of hazardous byproducts and intensive energy requirements (15,16). Among the mentioned techniques, the adsorption is one of the most effective and low-cost method for the dyes removal from aqueous solutions (17,18).…”

Section: Introductionmentioning

confidence: 99%

Removal of Acid Orang 7(AO7) Dye from Aqueous Solution by Using of Adsorption on to Rice Stem Waste: Kinetic and Equilibrium Study

Tilaki¹,

Balarak

Ghasemi

2014

Iran J Health Sci

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Background and purpose: dye is widely used in industries such as cosmetic, leather, paper and textile and release to the environment via their effluents. The purpose of this study was to compare the efficiency of low-cost adsorbents in acid orang 7 dyes removal from water. Materials and Methods:The Rice Stem biomass was sun dried, crushed and sieved to particle sizes in range of 1-2 mm. Then treated with 2.0 mol/L nitric acid for a period of 1 h followed by washing with distilled water and finally washed Stem was dried at 105• in oven. The residues concentration of acid orang 7 dyes was measured by spectrophotometer in λmax of 452 nm. The effect of pH, contact time and initial AO7 dye concentration, kinetic and isotherm models were studied. Then data interpreted and analyzed by Excel 16 software. Results:The pH value of 3, contact time of 75 min, adsorbent dosage of 8 g/L and dye concentration were 10 mg/l determined as optimum conditions for adsorbents. The most acid orang 7 dyes removal efficiency of 98% was obtained for modified Rice Stem in optimum conditions. The equilibrium data is best fitted on Langmuir isotherm and the adsorption kinetic model follows pseudo-second model.Conclusion: Based on data obtained in this study, it can be concluded that adsorption by modified Rice Stem is an efficient and reliable adsorbent for acid orang 7 dyes removal from liquid solutions.

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Biosorption of reactive dye using acid-treated rice husk: Factorial design analysis

Cited by 166 publications

References 31 publications

Response Surface Methodology for Adsorption of Fluoride Ion Using Nanoparticle of Zero Valent Iron from Aqueous Solution

Response Surface Methodology for Adsorption of Fluoride Ion Using Nanoparticle of Zero Valent Iron from Aqueous Solution

Calcined Mg-Fe layered double hydroxide as an absorber for the removal of methyl orange

Removal of Acid Orang 7(AO7) Dye from Aqueous Solution by Using of Adsorption on to Rice Stem Waste: Kinetic and Equilibrium Study

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