Functionalized bentonites for dye adsorption: Depollution and production of new pigments

Queiroga, Líbia N.F.; França, D.B.; Rodrigues, Francisco H. A.; Santos, I. M. G.; Fonseca, Maria G.; Jaber, Maguy

doi:10.1016/j.jece.2019.103333

Cited by 30 publications

(14 citation statements)

References 37 publications

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“…Functionalized clays have also attracted broad attention in the field of lake pigments since they provide better chemical and thermal stability. Recent studies have improved the clay properties by pillaring process (Trigueiro et al, 2018), organo-functionalization with aminosilane (De Queiroga et al, 2019) as well as incorporating a variety of surfactants (Wang and Wang, 2008;Baez et al, 2009;Micó-Vicent et al, 2017). In addition, our group recently reported hybrid pigments with excellent stability by incorporation of alizarin with a variety of organo-modified clays with cetyltrimethylammonium bromide (CTAB) (Silva et al, 2020), Rhodamine 640 perchlorate, sulforhodamine B and Kiton red 620 (Tangaraj et al, 2017) dyes.…”

Section: Introductionmentioning

confidence: 99%

Saponite-anthocyanin derivatives: The role of organoclays in pigment photostability

Lima

Silva

Silva-Filho

et al. 2020

Applied Clay Science

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Hybrid pigments based on organo-saponite (cetyltrimethyl ammonium bromide (CTAB-Sap) and a commercial anthocyanin (ACN) dye, Crystal Red Grape, were prepared. The interactions between organic dye guest and hosts (including saponite and organo-saponite) were investigated by X-ray diffraction, transmission electron microscopy and Fourier transform infrared spectroscopy. The pigments exhibit different colors function of their host-guest interactions. The blue color of organo-clay-anthocyanin indicates the stabilization of quinoidal base form of the dye. The hybrids have good stability against visible light irradiation and basic pH conditions. These dyed materials are environmentally friendly and can be promising candidates in different application fields.

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Section: Introductionmentioning

confidence: 99%

Saponite-anthocyanin derivatives: The role of organoclays in pigment photostability

Lima

Silva

Silva-Filho

et al. 2020

Applied Clay Science

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“…Another important factor was the quantity of NaCl in the medium because removal efficiency increased at lower NaCl concentrations. The final phosphate removal capacity in that study was 95% [261,262].…”

Section: Bentonitementioning

confidence: 74%

“…One of the options that has been applied to the reuse these colorants is to employ them as pigments [76,229,262,[301][302][303][304]. Once trapped inside a substrate such as clays, they can remain in this element to be later utilized during stamping processes.…”

Section: Pigmentmentioning

confidence: 99%

Uses of Nanoclays and Adsorbents for Dye Recovery: A Textile Industry Review

et al. 2021

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Wastewater recovery is one of the most pressing contaminant-related subjects in the textile industry. Many cleaning and recovery techniques have been applied in recent decades, from physical separation to chemical separation. This work reviews textile wastewater recovery by focusing on natural or synthetic nanoclays in order to compare their capabilities. Presently, a wide variety of nanoclays are available that can adsorb substances dissolved in water. This review summarizes and describes nanoclay modifications for different structures (laminar, tubular, etc.) to compare adsorption performance under the best conditions. This adsorbent capacity can be used in contaminant industries to recover water that can be used and be recontaminated during a second use to close the production circle. It explores and proposes future perspectives for the nanoclay hybrid compounds generated after certain cleaning steps. This is a critical review of works that have studied adsorption or desorption procedures for different nanoclay structures. Finally, it makes a future application proposal by taking into account the summarized pros and cons of each nanoclay. This work addresses contaminant reuse, where part of the employed dyes can be reused in printing or even dyeing processes, depending on the fixing capacity of the dye in the nanoclay, which is herein discussed.

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“…Among these new techniques is the use of nanoclays [7][8][9][10][11][12] as adsorbents for pollutants; also known as nanoadsorbents, they are capable of collecting dyes in textile effluents and separating them from the water. In previous works, several authors have demonstrated the adsorption capacity of these clays [13][14][15][16][17], although they have not reused these clays to make new dye baths. Some clays such as Laponite [18,19] can show desorption rates of around 20-40%.…”

Section: Of 18mentioning

confidence: 99%

Dyeing with Hydrotalcite Hybrid Nanoclays and Disperse, Basic and Direct Dyes

López-Rodríguez

Jordán-Núñez

Gisbert-Payá

et al. 2023

IJMS

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Textile effluents are among the most polluting industrial effluents in the world. Textile finishing processes, especially dyeing, discharge large quantities of waste that is difficult to treat, such as dyes. By recovering this material from the water, in addition to cleaning and the possibility of reusing the water, there is the opportunity to reuse this waste as a raw material for dyeing different textile substrates. One of the lines of reuse is the use of hybrid nanoclays obtained from the adsorption of dyes, which allow dye baths to be made for textile substrates. This study analyses how, through the use of the nanoadsorbent hydrotalcite, dyes classified by their charge as anionic, cationic and non-ionic can be adsorbed and recovered for successful reuse in new dye baths. The obtained hybrids were characterised by X-ray diffraction and infrared spectroscopy. In addition, the colour was analysed by spectrophotometer in the UV-VIS range. The dyes made on cotton, polyester and acrylic fabrics are subjected to different colour degradation tests to assess their viability as final products, using reflection spectroscopy to measure the colour attribute before and after the tests, showing results consistent with those of a conventional dye.

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Functionalized bentonites for dye adsorption: Depollution and production of new pigments

Cited by 30 publications

References 37 publications

Saponite-anthocyanin derivatives: The role of organoclays in pigment photostability

Saponite-anthocyanin derivatives: The role of organoclays in pigment photostability

Uses of Nanoclays and Adsorbents for Dye Recovery: A Textile Industry Review

Dyeing with Hydrotalcite Hybrid Nanoclays and Disperse, Basic and Direct Dyes

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