Chitosan, nanoclay and chitosan–nanoclay composite as adsorbents for Rhodamine-6G and the resulting optical properties

Vanamudan, Ageetha; Pamidimukkala, Padmaja

doi:10.1016/j.ijbiomac.2014.11.009

Cited by 94 publications

(34 citation statements)

References 20 publications

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“…Wastewater from textile and dying industries do not only contain heavy metal ions and dyes but also several sodium salts such as phosphates, sulfates, nitrates, and chlorides thereby affecting adsorption efficiency of the system . For this purpose, several experiments were carried out to see the effect of sodium salts (PO 4 ³ – ,

{SO}_{4}^{2 -}

{NO}_{3}^{-}

, and Cl – ) on the adsorption of CS‐MMT hydrogel for Cu(II) and NY dye.…”

Section: Resultsmentioning

confidence: 99%

“…Standard stock solutions of Cu(II) and NY dye were prepared by dissolving known amounts of copper nitrate trihydrate and NY dye in 250 mL flasks to obtain 500 ppm and 200 ppm of Cu(II) and NY dye stock solutions, respectively. The equilibrium uptake capacity ( q e ) and percentage removal (%R) of the hydrogel were calculated using the following equations:

q_{e} = (|, C_{o} - C_{e}) \frac{V}{M}

% R = \frac{C_{o} - C_{e}}{C_{o}} \times 100

where C o represents initial concentration (ppm) of the metal ion and dye, C e is the equilibrium concentration (ppm), M is the mass of biosorbent (g), V is the volume of metal ion and dye (L), q e is the equilibrium amount of metal ion and dye adsorbed (mg/g), and %R is the percentage removal …”

Section: Methodsmentioning

confidence: 99%

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Synergistic removal of Cu(II) and nitrazine yellow dye using an eco‐friendly chitosan‐montmorillonite hydrogel: Optimization by response surface methodology

Ngwabebhoh

Erdem

Yıldız

2016

J of Applied Polymer Sci

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A comprehensive feasibility study on adsorption of Cu(II) and a water‐soluble nitrazine yellow (NY) dye by chitosan‐montmorillonite (CS‐MMT) hydrogel as the biosorbent was investigated as a function of biosorbent dosage, initial concentration, pH, temperature, and the presence of salts. Box–Behnken methodology was applied to optimize the adsorption experiments. Maximum adsorption values were determined as 132.74 mg/g and 144.41 mg/g at pH = 5.0, for Cu(II) and NY dye, respectively. Equilibrium isotherms of Langmuir and Freundlich were analyzed by the non‐linear regression model. The equilibrium data were well described by Freundlich model and the adsorption process well fitted pseudo‐second order kinetics. The enthalpy change of adsorption (ΔH°) were calculated as −3.78 kJ/mol and −5.75 kJ/mol for Cu(II) and NY dye, respectively, indicating that the adsorption processes were exothermic. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43664.

show abstract

{SO}_{4}^{2 -}

{NO}_{3}^{-}

, and Cl – ) on the adsorption of CS‐MMT hydrogel for Cu(II) and NY dye.…”

Section: Resultsmentioning

confidence: 99%

q_{e} = (|, C_{o} - C_{e}) \frac{V}{M}

% R = \frac{C_{o} - C_{e}}{C_{o}} \times 100

Section: Methodsmentioning

confidence: 99%

Synergistic removal of Cu(II) and nitrazine yellow dye using an eco‐friendly chitosan‐montmorillonite hydrogel: Optimization by response surface methodology

Ngwabebhoh

Erdem

Yıldız

2016

J of Applied Polymer Sci

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show abstract

“…[7][8][9] Introduction of new functional groups to the amine groups provides additional properties such as new functional groups, surface charge control, and tunable hydrophilic/hydrophobic characteristics. 7,8 Therefore, many researchers have paid attention to amine-based polymers, such as polyethyleneimine (PEI), [10][11][12][13][14] chitosan, [15][16][17][18][19] melamine, [20][21][22] and so on. In recent years, among the amine-based polymers PEI has drawn special attention due to its superior properties for DNA transfection [23][24][25] and CO 2 capture.…”

Section: Introductionmentioning

confidence: 99%

Poly ionic liquid cryogel of polyethyleneimine: Synthesis, characterization, and testing in absorption studies

Şahiner

Demirci

2016

J of Applied Polymer Sci

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Here, we report the synthesis of polyethyleneimine (PEI) cryogels for the first time via cryopolymerization technique. The crosslinking of amine groups on the branched PEI chains is accomplished with epoxy groups of glycerol diglycidyl ether (GDE) based on epoxy-amine reactions in excess water at 218 8C in about 16 h. Superporous PEI cryogels with pore sizes >100 lm were shown to have very fast equilibrium swelling behavior, e.g., 10 s to reach maximum swelling in DI water. Furthermore, the synthesized PEI cryogels were exposed to anion exchange reaction after protonation by HCl treatments to generate PEI ionic liquid cryogels containing hexafluorophosphate, thiocyanate, dicyanamide, and tetrafluoroborate. It was also demonstrated that PEI cryogels modified with [PF 6 ] 2 absorbed 47.8 6 5.7 mg/g of bovine serum albumin (BSA). Moreover, PEI cryogels were shown to be very useful as simple filtration filling materials for the direct removal of organic dyes such as methyl orange (MO) and eosin Y (EY) from their corresponding aqueous solutions with 98.5 and 98.6% yields, respectively. The separation of methylene blue (MB) from MO and EY mixture by using PEI cryogels as column filler materials was also demonstrated.

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“…In the last few years the combination between bentonite with other materials such as metal oxide, polymers, and natural polymers has received a great deal of attention (Srinivasan, 2011;Dukic et al, 2015;Ianchis et al, 2015;Rzayev et al, 2015;Vanamudan and Pamidimukkala, 2015). Many of those composites were used as ecofriendly and efficient adsorbent for removal of organic, inorganic, and pathogenic contaminants from water and wastewater (Srinivasan, 2011), however, the main drawback for the application of those composites as adsorbent in real water or wastewater system is in the production cost of the composite.…”

Section: Introductionmentioning

confidence: 99%

Bentonite-hydrochar composite for removal of ammonium from Koi fish tank

Ismadji

Tong

Soetaredjo

et al. 2015

Applied Clay Science

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Chitosan, nanoclay and chitosan–nanoclay composite as adsorbents for Rhodamine-6G and the resulting optical properties

Cited by 94 publications

References 20 publications

Synergistic removal of Cu(II) and nitrazine yellow dye using an eco‐friendly chitosan‐montmorillonite hydrogel: Optimization by response surface methodology

Synergistic removal of Cu(II) and nitrazine yellow dye using an eco‐friendly chitosan‐montmorillonite hydrogel: Optimization by response surface methodology

Poly ionic liquid cryogel of polyethyleneimine: Synthesis, characterization, and testing in absorption studies

Bentonite-hydrochar composite for removal of ammonium from Koi fish tank

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