Optimization of the adsorption of a textile dye onto nanoclay using a central composite design

Hassani, Aydin; Kıranşan, Murat; Soltani, Reza Darvishi Cheshmeh; Khataee, Alireza; Karaca, Semra

doi:10.3906/kim-1412-64

Cited by 55 publications

(7 citation statements)

References 44 publications

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“…These numbers indicate that humic acid adsorbed onto bentonite nanoparticles with more power in comparison with nano particles of montmorillonite. Other studies have reported similar results (20,21). According to Figure 5 regression coefficient, the BET isotherm provides a better description for humic acid ad- sorption on montmorillonite than the description that Langmuir and Freundlich isotherms provide for this process (adsorption of humic acid by montmorillonite).…”

Section: Discussionsupporting

confidence: 67%

Application of Different Isotherm Models for Humic Acid Adsorption on to Bentonite and Montmorillonite Nanoparticles

2016

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Background: Adsorption isotherms describe the relationship between the equilibrium concentration of the adsorbed matter in the solution and the amount of adsorbed matter on the surface of the adsorbent. Objectives:The main objective of the present research was to investigate different adsorption isotherms for describing adsorption of humic acid by nanoclay. Methods:In this study, Langmuir, Freundlich, BET, Temkin and Dubinin Radushkevich isotherms, for describing the behavior of humic acid adsorption by bentonite and montmorillonite nanoparticles, were examined. Results:The results showed that due to the regression coefficient (R 2 ), humic acid adsorption on bentonite and montmorillonite nanoparticles has greater compliance with Dubinin Radushkevich isotherms. The value of E or average energy of adsorption for humic acid by bentonite and montmorillonite nanoparticles was 0.17 and 0.15 kJ mol -1 , respectively, which specifies that the type of adsorption of humic acid on both nanoparticles was physisorption. The qmax value obtained from the Dubinin-Radushkevich isotherms, for bentonite and montmorillonite nanoparticles were 27.78 and 28.70 mg/g, respectively.Conclusions: According to the results of this study, bentonite and montmorillonite nanoparticles have a great potential for the removal of humic acid from aqueous solutions.

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Section: Discussionsupporting

confidence: 67%

Application of Different Isotherm Models for Humic Acid Adsorption on to Bentonite and Montmorillonite Nanoparticles

2016

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“…Biological treatments are not sufficiently to adsorbed organic dyes and delight colored wastewaters due to the low biodegradability of organic dyes. Therefore, physicochemical processes have been used to degrade or remove organic dyes in aqueous solutions [13,14]. Adsorption using solid adsorbent is one of the physicochemical treatment approaches, and has been established to be efficient and economical [14].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, physicochemical processes have been used to degrade or remove organic dyes in aqueous solutions [13,14]. Adsorption using solid adsorbent is one of the physicochemical treatment approaches, and has been established to be efficient and economical [14]. In spite of, activated carbon was the most widely adsorbent employed but it has been limited due to its high capital and operative costs [11,[15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Improvement of dyes removal from aqueous solution by Nanosized cobalt ferrite treated with humic acid during coprecipitation

2019

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Highly effective novel adsorbent [CoFe 2 O 4-humic acid(HA)] was synthesized by co-precipitation technique at pH 6 (H6) and pH 8 (H8). XRD, S BET and Zeta-potential measurements were used to study the physicochemical properties of the prepared nanoparticles. XRD results showed that the chemical treatment of CoFe 2 O 4 by HA causes the appearance of carbon as new active sites for adsorption process. Batch adsorption tests were achieved to eliminate anionic remazole-red (RR-133) and cationic methylene blue (MB) dyes. The obtained data showed that H6 and H8 solids calcined at 300 and 500 °C have higher adsorption rate for removing of dye than unmodified cobalt iron mixed oxide. The removal reached 100% after a period of dye contact time 2 min and 30 min for RR and MB, respectively. The uptake of RR and MB was much affected by the pH of dye solution. The pseudo-second-order kinetic model was the most fitted well and the adsorption process followed the Langmuir isotherm model. The adsorption of dye on adsorbent was chemisorption process. The as-prepared adsorbents can be regenerated and reused four times for both dyes. The efficiency of the prepared nano-samples and durability as adsorbent were accomplished.

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“…36 The goodness-of-fit of the model is checked by using an R 2 value of 0.9331 and means that approximately 93% of the data were compatible and 7% of the variance could not be explained by the model. 32,34 R 2 adj shows the degree of correlation between the experimental and predicted values 34,37 and also summarizes the model adequacy and fitness and serves to correct R 2 values for the sample size and the number of terms. 32 As values near 1 are acceptable, 32 an R 2 adj value of 0.8706 shows the proper significance of the model.…”

Section: Optimization Using Rsm Methodologymentioning

confidence: 99%

Development of a sample preparation strategy for the determination of tungsten in soil samples by inductively coupled plasma mass spectrometry using a response surface methodology

Erdemir¹

2017

Turk J Chem

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An alternative rapid digestion method has been developed for the determination of tungsten (W) in soil samples using fractionation studies and response surface methodology. The digestion method using the Kjeldahl instrument was applied to samples, and soluble tungsten was determined via inductively coupled plasma mass spectrometry. Digestion parameters were selected depending on the results of fractionation studies and optimized using a four-factor and five-level central composite design. The contributions of the phosphoric acid concentration (X 1) , digestion temperature (X 2) , digestion time (X 3) , and hydrochloric acid concentration (X 4) were evaluated for the determination of W from samples in which its levels were maximum. Optimum conditions for factors were found to be X 1 = 9.00 M, X 2 = 124 • C, X 3 = 45 min, and X 4 = 1.52 M using a predicted W level of 86.82 µ g L −1 . This yielded an expected level of 1736.40 mg kg −1 under the optimized conditions. Experimental W levels were in good agreement with this predicted level and found to be 1682.69 mg kg −1 . Thus, measured W levels showed the versatility of the central composite design in such a complex soil matrix for method development.

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Optimization of the adsorption of a textile dye onto nanoclay using a central composite design

Cited by 55 publications

References 44 publications

Application of Different Isotherm Models for Humic Acid Adsorption on to Bentonite and Montmorillonite Nanoparticles

Application of Different Isotherm Models for Humic Acid Adsorption on to Bentonite and Montmorillonite Nanoparticles

Improvement of dyes removal from aqueous solution by Nanosized cobalt ferrite treated with humic acid during coprecipitation

Development of a sample preparation strategy for the determination of tungsten in soil samples by inductively coupled plasma mass spectrometry using a response surface methodology

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