Methylene blue removal by alginate–clay quasi-cryogel beads

Uyar, Güler; Kaygusuz, Hakan; Erim, F. Bedia

doi:10.1016/j.reactfunctpolym.2016.07.001

Cited by 92 publications

(37 citation statements)

References 36 publications

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“…The resulting effluents can affect the photosynthetic activities of aquatic plants by inhibiting the penetration of sunlight into deeper water layers and cause health hazards like skin diseases, allergy, neurological problems, kidney dysfunction, and throat swelling, besides serious environmental threat. [11][12][13][14][15][16] Therefore, it is imperative to reduce and eliminate such pollutants through a suitable technology that can achieve the desired level of industrial wastewater treatment for environmental safeguarding. 17 Currently, several technologies, such as adsorption, [18][19][20][21][22][23][24] membrane separation 20,25 nanoltration, 26,27 ozonation, 28,29 electrootation, 30 precipitation, 31 oxidation, 32,33 and coagulation, [34][35][36] have been developed to remove these dyes.…”

Section: Introductionmentioning

confidence: 99%

A novel method for highly effective removal and determination of binary cationic dyes in aqueous media using a cotton–graphene oxide composite

et al. 2020

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Section: Introductionmentioning

confidence: 99%

A novel method for highly effective removal and determination of binary cationic dyes in aqueous media using a cotton–graphene oxide composite

et al. 2020

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“…Natural polymers are interesting materials to produce cryogels due to their abundance, low cost, biocompatibility, and biodegradability. For instance, cryogels of chitosan/alginate complexes decorated with hydroxyapatite were successfully applied for the proliferation of osteosarcoma cells, 3‐aminophenlyboronic acid modified agarose/chitosan monolithic cryogels presented specific recognition for glycoproteins, hydrophobic cellulose cryogels were reported as potential adsorbents for petroleum, alginate‐montmorillonite and hydroxypropyl methylcellulose (HPMC) cryogels displayed efficient removal of methylene blue from aqueous medium.…”

Section: Introductionmentioning

confidence: 99%

Cellulose Based Cryogels as Adsorbents for Organic Pollutants

Toledo

Martins

Pirich

et al. 2019

Macromolecular Symposia

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Cryogels of hydroxypropyl methylcellulose (HPMC) and bacterial cellulose nanocrystals (CNC) were prepared with 0, 5, or 15 wt% contents of CNC. Two types of CNC were used, namely, CNC‐SO4 and CNC, with ζ‐potential values of − (46 ± 1) mV and − (5 ± 1) mV, respectively. Regardless the CNC type or content, all cryogels presented similar density, capillarity constant, contact angle, swelling rate values, and morphology. However, the addition of only 5% of CNC‐SO4 to HPMC cryogels increased the compressive modulus from (120 ± 15) kPa to (150 ± 19) kPa. The cryogels were tested as adsorbents for 17α‐ethinyl estradiol (EE) and methylene blue (MB). In the dilute range, the pollutants removal efficiency of reinforced cryogels was considerably larger than that of neat cryogels. In the more concentrated range, all adsorbents presented similar efficiency. The adsorption isotherms of EE and MB onto cryogels fitted with sigmoidal and Freundlich adsorption models, indicating higher affinity for aerogels with 5% CNC‐SO4. Cryogels could be recycled 10 and 5 times, respectively, for MB and EE adsorption/desorption under flow without losing efficiency, disclosing their potential for preconcentration of pollutants, and environmental remediation.

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“…Even small amounts of dyes are capable of coloring huge volumes of water, thereby influencing the aesthetic value and decreasing light penetration needed for aquatic plant photosynthesis. Moreover, a lot of dyes are poisonous or carcinogenic ( Uyar et al., 2016 ; Santos and Boaventura, 2016 ; Zhou et al., 2014 ). Hence, the elimination of dyes from wastewater is of great importance for environmental safeguard.…”

Section: Introductionmentioning

confidence: 99%

Calcined magnesite as an adsorbent for cationic and anionic dyes: characterization, adsorption parameters, isotherms and kinetics study

Ngulube

Gumbo

Masindi

et al. 2018

Heliyon

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The ability of calcined magnesite for Methylene Blue (MB), Direct Red 81 (DR81), Methyl Orange (MO) and Crystal Violet (CV) dye removal was evaluated in this study. The experiments were designed to test the hypothesis that alkaline earth carbonates can remove dyes from water through a combination of sorption and coagulative reactions involving Mg2+. To achieve that, several operational factors like residence time, dosage, adsorbent concentration and temperature were appraised. The batch study proved that calcined magnesite is effective in the treatment of MB, DR81, CV and MO contaminated water and moreover it performed well in terms of color removal. The adsorption equilibrium data were analysed by the Langmuir, Freundlich, Dubinin–Radushkevich and Temkin isotherm models, and the Dubinin–Radushkevich and Temkin models were found to be the most appropriate fit to MB and MO dyes respectively. The adsorption kinetics process primarily followed the Elovich and Pseudo-second order model, a possible indication that chemisorption was the rate limiting step during the dye uptake process. With the adsorption–desorption cycle repeated four times, the calcined magnesite regeneration efficiency for DR81 and MO loaded dyes remained very high. According to the results of this study, it can be concluded that calcined magnesite can be used effectively for the adsorption of MB, DR81, CV and MO from wastewater.

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Methylene blue removal by alginate–clay quasi-cryogel beads

Cited by 92 publications

References 36 publications

A novel method for highly effective removal and determination of binary cationic dyes in aqueous media using a cotton–graphene oxide composite

A novel method for highly effective removal and determination of binary cationic dyes in aqueous media using a cotton–graphene oxide composite

Cellulose Based Cryogels as Adsorbents for Organic Pollutants

Calcined magnesite as an adsorbent for cationic and anionic dyes: characterization, adsorption parameters, isotherms and kinetics study

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