Adsorptive removal of basic dyes from aqueous solutions by surfactant modified bentonite clay (organoclay): Kinetic and competitive adsorption isotherm

Anirudhan, T.S.; Ramachandran, M.

doi:10.1016/j.psep.2015.03.003

Cited by 343 publications

(148 citation statements)

References 40 publications

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“…The researchers are looking for cheaper, easily available materials for dye adsorption [20][21]. Various types of clay sepiolite [19], zeolite [22], montmorillonite [23][24], smectite [25], and bentonite [26] may be used as alternative low-cost adsorbents for treating dye effluents. Specific surface area, high chemical and mechanical stability, and various structural and surface properties make the clays widely useful.…”

Section: Introductionmentioning

confidence: 99%

Adsorption Characteristics of Magnesium-Modified Bentonite Clay with Respect to Acid Blue 129 in Aqueous Media

Hussain¹,

Ullah²,

Gul³

et al. 2016

Pol. J. Environ. Stud.

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Locally available bentonite clay has been modified by magnesium and used to eliminate acid blue 129 from aqueous solutions. The adsorption was studied under different experimental conditions such as dye concentrations, temperature, and shaking time. The adsorption of the dye increased with time and followed the pseudo-first-order kinetic with rate constant "k" 0.126 min -1 at 283 K. Thermodynamic parameters such as ΔH°, ΔS°, and ΔG° were calculated from the slope and intercept of the linear plots of ln K against 1/T. Analysis of adsorption results obtained at temperatures of 283, 293, 303, and 313 K showed that the adsorption pattern on bentonite seems to follow Langmuir and Freundlih. The increase in temperature reduces adsorption capacity by magnesium-modified bentonite due to the enhancement of the desorption step in the mechanism. The activation energy of the adsorption process was found to be 3.55 kJ mol -1 . The Mg-bentonite showed better adsorption than Ba and Al-bentonite. Our study reveals that abundantly available local clay may be used to eliminate dyes from aqueous solutions.

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Section: Introductionmentioning

confidence: 99%

Adsorption Characteristics of Magnesium-Modified Bentonite Clay with Respect to Acid Blue 129 in Aqueous Media

Hussain¹,

Ullah²,

Gul³

et al. 2016

Pol. J. Environ. Stud.

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“…Natural bentonite is also available in large quantities and easily obtained in tropical country such as Indonesia [8]. Natural bentonite was largely used as effective adsorbent for several dyes such as congo red [9], methylene blue [10], procion red [2], basic red [11], reactive yellow [1], and also other acidic and basic dyes [12]. These process were emphasized on adsorption process only and limited study was found for kinetic studies in term of reactivity of adsorbate into adsorbent.…”

Section: Introductionmentioning

confidence: 99%

“…Kinetic adsorption was determined using batch adsorption system at various times in several concentrations of procion red. Time of adsorption was investigated at 5,10, 20, 30, 45, 60, 90, and 120 minutes in 10, 25, 50, and 75 mg/L of procion red. The data was calculated using Langmuir-Hinshelwood kinetic equation.…”

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confidence: 99%

Adsorption of Procion Red on Natural Bentonite: Kinetic Studies

Taher¹,

Lesbani²

2016

sje

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Adsorption of procion red on natural bentonite was studied by kinetic study to know the reactivity of procion red. Kinetic adsorption was determined using batch adsorption system at various times in several concentrations of procion red. Time of adsorption was investigated at 5,10, 20, 30, 45, 60, 90, and 120 minutes in 10, 25, 50, and 75 mg/L of procion red. The data was calculated using Langmuir-Hinshelwood kinetic equation. The diffusions process of procion red into bentonite at lower concentration was faster than at higher concentration in general with fit correlation between [(ln(Co/C))/C] vs t/C from Langmuir-Hinshelwood data. The adsorption procion red on bentonite data at various times shows Langmuir monolayer adsorption process in the surface of bentonite. Keyword: adsorption, procion red, natural bentonite, kinetic Abstrak (Indonesian): Adsorpsi procion merah pada bentonit alam telah dipelajari melalui studi kinetik untuk mengetahui reaktivitas procion merah. Kinetika adsorpsi ditentukan menggunakan sistem adsorpsi simultan pada berbagai waktu dalam beberapa konsentrasi procion merah. Waktu adsorpsi dipelajari pada 5, 10, 20, 30, 45, 60, 90, dan 120 menit pada konsentrasi procion merah 10, 25, 50, dan 75 mg/L. Data dihitung menggunakan persamaan kinetika Langmuir-Hinshelwood. Proses difusi procion merah ke dalam bentonit pada konsentrasi rendah lebih cepat dibanding pada konsentrasi lebih tinggi secara umum dengan hubungan korelasi yang lurus antara [(ln(Co/C))/C] versus t/C dari data Langmuir-Hinshelwood. Adsorpsi procion merah pada bentonit dengan berbagai variasi waktu adsorpsi menunjukkan proses adsorpsi satu lapisan pada permukaan bentonit.

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“…Ingestion of this dye may cause gastrointestinal irritation; discoloration of the oral mucosa; irritation of the lips, mouth, and throat; paleness of the complexion; lack of coordination; or drowsiness. 9) Moreover, crystal violet (CV) can cause bladder cancer in human and cancer of the digestive system in other animals. 10) Ingestion of CV at higher concentrations causes nausea, vomiting, and central nervous system depression.…”

mentioning

confidence: 99%

“…10) Ingestion of CV at higher concentrations causes nausea, vomiting, and central nervous system depression. 9) Therefore, cationic dyes have to be removed from environmental water. There are various removal treatment processes for dye from wastewater, for example, physical separation, advanced chemical oxidation, and biological degradation.…”

mentioning

confidence: 99%

Adsorption Capability of Cationic Dyes (Methylene Blue and Crystal Violet) onto Poly-γ-glutamic Acid

Ogata

Nagai

Kawasaki

2017

CHEMICAL & PHARMACEUTICAL BULLETIN

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In this study, the adsorption capability of cationic dyes, which were methylene blue and crystal violet, by poly-γ-glutamic acid (PGA) in a single or binary solution system was investigated. The effect of the molecular weight of PGA, initial dye concentration, solution pH, and temperature on the adsorption of dyes was evaluated. The adsorption mechanism of dyes onto PGA was the interaction between -COOH group on the PGA surface and the polarity groups of dyes. These results indicated that PGA is useful for removal of dyes and cationic organic compounds from a single or binary solution system.

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Adsorptive removal of basic dyes from aqueous solutions by surfactant modified bentonite clay (organoclay): Kinetic and competitive adsorption isotherm

Cited by 343 publications

References 40 publications

Adsorption Characteristics of Magnesium-Modified Bentonite Clay with Respect to Acid Blue 129 in Aqueous Media

Adsorption Characteristics of Magnesium-Modified Bentonite Clay with Respect to Acid Blue 129 in Aqueous Media

Adsorption of Procion Red on Natural Bentonite: Kinetic Studies

Adsorption Capability of Cationic Dyes (Methylene Blue and Crystal Violet) onto Poly-γ-glutamic Acid

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