Investigation of the adsorption kinetics of methylene blue onto cotton wastes

Acemioğlu, Bilal; Ertaş, Murat; Alma, Mehmet Hakkı; Usta, Mustafa

doi:10.3906/kim-1304-88

Cited by 8 publications

(4 citation statements)

References 20 publications

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“…Also, values in the table and the fixed amounts of dye adsorption are showed [17]. This is an indication of experimental and theoretically pseudo-second-order compliance [17,18].…”

Section: Amount Of Substance Extracted By Alcohol (Physical Adsorptiosupporting

confidence: 56%

A Study on Copolymer Systems of Styrene with Diethanolamine Side Group and Methyl Methacrylate

Açıkses

Taskan

Barim

2018

Journal of Chemistry

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4-Diethanolaminomethyl styrene (DEAMSt) monomer was prepared by the modification of 4-chloromethyl styrene with diethanolamine. The copolymers in different combinations (0.11, 0.19, and 0.30 by mole) of DEAMSt and methyl methacrylate (MMA) were prepared by free radical polymerization method at 60°C in the presence of 1,4-dioxane and AIBN as initiator. The structures of DEAMSt and DEAMSt-MMA copolymer were characterized by FT-IR and 1H-NMR. The glass transition temperature (Tg) of the copolymers was measured by DSC. Thermal decomposition behavior of the copolymers was investigated by TGA. The average molecular weights of the copolymers were determined by GPC. The dye uptaking properties of the copolymers were investigated using bromocresol green. Then, the dielectric constant, dielectric loss factor, and conductivity of copolymers were investigated as a function of temperature and frequency. The activation energies (Ea) of the copolymers were determined by impedance analyzer.

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“…Also, values in the table and the fixed amounts of dye adsorption are showed [17]. This is an indication of experimental and theoretically pseudo-second-order compliance [17,18].…”

Section: Amount Of Substance Extracted By Alcohol (Physical Adsorptiosupporting

confidence: 56%

A Study on Copolymer Systems of Styrene with Diethanolamine Side Group and Methyl Methacrylate

Açıkses

Taskan

Barim

2018

Journal of Chemistry

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“…7 Adsorption implementations to accomplish MB removal cover a wide variety of low cost materials. The following adsorbents exemplify the recent investigations considering beech sawdust, 1 kaolinite, 8 spinel magnesium aluminate nanoparticles, 9 modified and/or unmodified montmorillonite/clay, 10−13 sepiolite, 14 zeolite, 15−18 silica nanosheets derived from vermiculite, 19 cotton wastes, 20 biosorbents like modified Ficus carica, 4 polymeric sorbents such as cross-linked poly(hydroxymethylacrylamide-co-acrylic acid) 21 and composite materials such as starch-graft-acrylic acid/Na-MMT nanocomposite hydrogels 22 and chitosan-g -poly(acrylic acid)/montmorillonite nanocomposites, 23 ionic composite hydrogels based on polyacrylamide and dextran sulfate, 24 polymethacrylic acid grafted cellulose/montmorillonite composite, 25 and graphene oxide-magnetite nanocomposite. 26 Among these, clay minerals and zeolites are particularly attractive adsorbents since they are easily available at low cost due to their high abundance in nature, in addition to their excellent mechanical and thermal resistance, and large surface area thanks to their layered and lattice structure.…”

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confidence: 69%

Adsorptive features of polyacrylamide--aluminosilicate composites for methylene blue

Baybaş

Ulusoy²

2016

Turk J Chem

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Polyacrylamide-montmorillonite (PAAm-Mt) and polyacrylamide-clinoptilolite (PAAm-Z) composites were prepared by cross-linked polymerization of acrylamide in dispersions of Mt and Z. The composites were characterized by FT-IR, SEM, XRD, CEC, and PZC analysis. The adsorptive features of PAAm-Mt and PAAm-Z for methylene blue (MB) were investigated by their relevance to initial dye concentration, temperature, contact time, PZC, and pH. The monolayer adsorption capacities were 0.14 and 0.08 mol kg −1 for PAAm-Z and PAAm-Mt, respectively. The changes in pH of MB solution had an insignificant influence on their adsorption capacities. The values of enthalpy and entropy changes were positive ( ∆ H P AAm−M t = 7.6 and ∆ H P AAm−Z = 17.6 kJ mol −1 , ∆ S P AAm−M t = 55.7, and ∆ S P AAm−Z = 107.2 J mol −1 K −1 ) . The negative free enthalpy change was proof of the spontaneity of adsorption ( ∆ G P AAm−M t = -9.0, ∆ G P AAm−Z = -14.4 kJ mol −1 ) . The adsorption kinetics obeyed a pseudo-second order model (k P AAm−M t= 11.5 and k P AAm−Z = 1.18 mol −1 kg min −1 , R 2 > 0.99). The adsorption mechanism was the combination of chemical and physical adsorption governed by Coulombic forces (liquid film diffusion) on which the contribution of intraparticle diffusion was not significant. This was consistent with a low value of the adsorption activation energy (E a = 9.4 kJ mol −1 ) . The composites had amphoteric features buffering the pH of the studied adsorption environment to approximately neutral levels.

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confidence: 99%

“…The fixing process of reactive dyes in the D5 dyeing system is rarely studied, and the reaction between dyes and fibers is mainly characterized by the absorbance method or the color depth of the dyed textiles. 20,21 For the degree of reaction between dyes and fibers, the spectroscopic method can be employed to characterize the bonding reaction. 22,23 Patino et al 22 employed the X-ray electron spectroscopy (XPS) method to characterize the amount of dye which had been reacted with the fiber by measuring the changes in the surface element content of the fiber before and after dyeing.…”

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confidence: 99%

Study on reactive dyeing in a sustainable nonaqueous medium dyeing system by X-ray electron spectroscopy

Chen

Shi

et al. 2023

Textile Research Journal

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In the nonaqueous medium dyeing system (decamethylcyclopenta siloxane; D5), the bonding between cotton fiber and reactive dye may be influenced by the dyeing medium. To evaluate the dyeing performance of reactive dye in the D5 dyeing system, the fixing of reactive dyes with different structures was studied. Before and after dyeing, the chemical environment of cotton fiber was investigated by X-ray electron spectroscopy, and compared with the spectroscopic method. Compared with traditional reactive dyeing, the color depth of the dyed cotton fabrics and the final fixation of dyes are much higher in the D5 dyeing system. The elements of the cellulose fiber surface are changed after dyeing. Especially for N element, its content is increased after dyeing. After 30 minutes, the final fixation of reactive dye is about 80% by analyzing the account of N. Compared with the undyed cellulose fiber, the peak area of C–C or C–H is gradually increased after dyeing, but the proportion of C–O is decreased with the fixing time. The proportion of O–C–O is not changed much with the fixation time. Therefore, the C–C or C–H chemical environment on the cellulose fiber surface will be changed after dyeing. Therefore, the bonding of dyes and fibers can be analyzed through the change of the C1s chemical environment or the amount of N element before and after dyeing. This investigation successfully developed a method which could evaluate the fixation process in the D5 dyeing system.

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Investigation of the adsorption kinetics of methylene blue onto cotton wastes

Cited by 8 publications

References 20 publications

A Study on Copolymer Systems of Styrene with Diethanolamine Side Group and Methyl Methacrylate

A Study on Copolymer Systems of Styrene with Diethanolamine Side Group and Methyl Methacrylate

Adsorptive features of polyacrylamide--aluminosilicate composites for methylene blue

Study on reactive dyeing in a sustainable nonaqueous medium dyeing system by X-ray electron spectroscopy

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