Removing of Congo red from aqueous solution by 2-hydroxyethyl methacrylate-g-poly(ethylene terephthalate) fibers

2019 ◽  
Vol 76 (12) ◽  
pp. 6179-6191 ◽  
Author(s):  
Zehra Gün Gök ◽  
Kübra Günay ◽  
Metin Arslan ◽  
Mustafa Yiğitoğlu
Keyword(s):  
Aqueous Solution ◽  
Congo Red ◽  
Ethylene Terephthalate ◽  
Hydroxyethyl Methacrylate ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

Use of 4-vinylpyridine and 2-hydroxyethylmethacrylate monomer mixture grafted poly(ethylene terephthalate) fibers for removal of congo red from aqueous solution

e-Polymers ◽  
2008 ◽  
Vol 8 (1) ◽  
Author(s):  
Metin Arslan ◽  
Mustafa Yiğitoğlu
Keyword(s):  
Congo Red ◽  
Ethylene Terephthalate ◽  
Adsorption Equilibrium ◽  
Treatment Time ◽  
Monomer Mixture ◽  
Adsorption Time ◽  
Poly Ethylene Terephthalate ◽  
Vinyl Pyridine ◽  
Pet Fibers ◽  
Poly Ethylene

AbstractIn this study, a novel fibrous adsorbent made by grafting 4-vinyl pyridine (4-VP) and 2-hydroxyethylmethacrylate (HEMA) monomer mixture onto poly(ethylene terephthalate) (PET) fibers was used for removal of Congo red (CR) in aqueous solutions by a batch equilibration technique. The influence of treatment time, pH of solution, dyes concentration, and reaction temperature on adsorbed amount was investigated. Adsorption time of 60 min. was found sufficient to reach adsorption equilibrium for CR. It was found that the adsorption isotherm of CR fits to Langmuir type isotherms. The highest adsorption capacity was found to be 11.87 mg CR per gram adsorbent. The adsorption rate of CR is much higher on the comonomers grafted PET fibers than on the ungrafted PET fibers. CR was removed 97 % when the initial dye concentration was 5 mg L-1 and 38% at 150 mg L-1 by monomers mixture grafted PET fibers. The adsorption of the dye was endothermic in nature (ΔH°=45.3 KJmol-1). It was found that the reactive fibers are stable and regenerate by acid without losing its activity.

Improving the adhesion of poly(ethylene terephthalate) fibers to poly(hydroxyethyl methacrylate) hydrogels by ozone treatment: Surface characterization and pull-out tests

Polymer ◽  
2005 ◽  
Vol 46 (23) ◽  
pp. 9840-9850 ◽  
Author(s):  
Lino Ferreira ◽  
Marta B. Evangelista ◽  
Ma Cristina L. Martins ◽  
Pedro L. Granja ◽  
José L. Esteves ◽  
...  
Keyword(s):  
Surface Characterization ◽  
Ethylene Terephthalate ◽  
Ozone Treatment ◽  
Hydroxyethyl Methacrylate ◽  
Pull Out ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

Aromatic-aliphatic copolyesters based on waste poly(ethylene terephthalate) and their biodegradability

e-Polymers ◽  
2008 ◽  
Vol 8 (1) ◽  
Author(s):  
Irena Prokopová ◽  
Eva Vlčková ◽  
Václav Šašek ◽  
Josef Náhlík ◽  
Veronika Soukupová–Chaloupková ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Aqueous Solution ◽  
Lactic Acid ◽  
Ethylene Terephthalate ◽  
Molar Mass ◽  
Amorphous Structure ◽  
Structural Units ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene ◽  
Physical Degradation

AbstractThe solvolysis of poly(ethylene terephthalate) from disposed beverage bottles by an aqueous solution of lactic acid, followed by the zinc acetate catalyzed polycondensation of the solvolytic product, yielded a series of aromatic-aliphatic copolyesters containing up to 55 mol.% of incorporated lactic acid structural units. Their molecular parameters were determined using SEC and viscometry. According to DSC, the copolyesters have amorphous structure. Selected copolyester samples were subjected to abiotic hydrolysis at pH 7 and 60 °C. After three days of hydrolysis, the mass of the samples decreased substantially and their molar mass was reduced. At 37 °C, strong degradation of copolyesters by action of the actinomycete Rhodococcuserythropolis was observed. Biodegradability of the copolyesters was confirmed by a composting test. In addition to the changes of the molecular structure of the composed samples, the physical degradation of the foils of the samples tested was also documented by SEM.

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