Adsorption and identification of traces of dyes in aqueous solutions using chemically modified eggshell membranes

Candido, Iuri C. M.; Soares, Juliana Mikaelly Dias; Barbosa, Jaderson de Araújo Barros

doi:10.1016/j.biteb.2019.100267

Cited by 21 publications

(9 citation statements)

References 44 publications

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“…The two models of adsorption kinetics, pseudo-first-order (Equation ( 4)) and pseudosecond-order (Equation ( 5)), were used to evaluate interactions between adsorbents and pollutants [4,33]. dq t dt = k 1 q e − q t or ln q e − q t = lnq e − k 1 t (4) dq t dt = k 2 q e − q t 2 (5) where q e and q t are the adsorption capacity at the equilibrium (mg g −1 ) and at time t, k 1 and k 2 are the pseudo-first-order and pseudo-second-order rate constants (min −1 ), respectively, and t is the adsorption time (min).…”

Section: Adsorption Kineticsmentioning

confidence: 99%

“…Among them, dyes and heavy metals are two of the most severe aquatic pollutants [1]. These pollutants usually come from effluents of various industries such as textile dyeing, printing, cosmetics, paints, leather products, mining, chemical manufacturing, electroplating, battery manufacturing, and metal processing [3][4][5]. For example, methylene blue (MB) is a popular thiazine dye used in silk, cotton, and wood dyeing processing.…”

Section: Introductionmentioning

confidence: 99%

“…There are various techniques available for the removal of heavy metals and dyes from wastewater, such as membrane filtration [8,12], chemical precipitation [13], ion exchange [14], electrolytic techniques [15], biological methods [16], chemical oxidation or reduction process [17], and adsorption [4][5][6][7][9][10][11]. The adsorption method has been exhibited as a facile, efficient, low-cost, and environment-friendly method for wastewater treatment.…”

Section: Introductionmentioning

confidence: 99%

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Highly Porous Hydroxyapatite/Graphene Oxide/Chitosan Beads as an Efficient Adsorbent for Dyes and Heavy Metal Ions Removal

et al. 2021

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Dye and heavy metal contaminants are mainly aquatic pollutants. Although many materials and methods have been developed to remove these pollutants from water, effective and cheap materials and methods are still challenging. In this study, highly porous hydroxyapatite/graphene oxide/chitosan beads (HGC) were prepared by a facile one-step method and investigated as efficient adsorbents. The prepared beads showed a high porosity and low bulk density. SEM images indicated that the hydroxyapatite (HA) nanoparticles and graphene oxide (GO) nanosheets were well dispersed on the CTS matrix. FT-IR spectra confirmed good incorporation of the three components. The adsorption behavior of the obtained beads to methylene blue (MB) and copper ions was investigated, including the effect of the contact time, pH medium, dye/metal ion initial concentration, and recycle ability. The HGC beads showed rapid adsorption, high capacity, and easy separation and reused due to the porous characteristics of GO sheets and HA nanoparticles as well as the rich negative charges of the chitosan (CTS) matrix. The maximum sorption capacities of the HGC beads were 99.00 and 256.41 mg g−1 for MB and copper ions removal, respectively.

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Section: Adsorption Kineticsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Highly Porous Hydroxyapatite/Graphene Oxide/Chitosan Beads as an Efficient Adsorbent for Dyes and Heavy Metal Ions Removal

et al. 2021

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“…Alternatives are observed from the use of paper-based devices [27] with advantages related to the intrinsic porous structure of cellulosic fibers (such as the adsorption). Another possibility to produce SERS devices on natural fibers has been observed from the synthesis of metal nanoparticles on fibers of eggshell membranes [57].…”

Section: Preparation Of Sers Devicesmentioning

confidence: 99%

Metal nanoparticles/carbon dots nanocomposites for SERS devices: trends and perspectives

Oliveira

Gomes

2020

SN Appl. Sci.

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Carbon dots and carbon dots-based nanocomposites have found a myriad of technological applications. Despite the primary use of carbon dots as catalysts in the reduction process to form metal nanoparticles, their strong interaction with metal nanostructures in nanocomposites can be further exploited. By tuning the emission of carbon dots and the absorption band of metal nanoparticles, it is possible to reach adequate surface-enhanced Raman scattering (SERS) from the resulting nanocomposites. Herein, it is reported the state-of-art in metal/carbon dots nanocomposites applied as active elements for SERS devices in the detection of traces of analytes. Strategies of synthesis, morphology (aggregation and anti-aggregation methods) and the improvement in the homogeneous distribution of noble metal nanoparticles on substrates have been discussed to reach the best performance for highly efficient SERS devices.

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“…A promising alternative to those experimental systems refers to the production of fluorescent sensors such as carbon dots-based materials with high efficiency and low-cost for the identification of metal ion traces [3]. Concerning the removal of dyes and pigments contaminants from wastewater, different strategies have been considered such as electrocoagulation, ion exchange and ultrafiltration [4] that are associated with high costs techniques for large scale applications. An alternative solution is a porous net structure for adsorption of dye molecules in which a high porosity medium with high surface area offers available sites to adsorb contaminants [5].…”

Section: Introductionmentioning

confidence: 99%

Carbon Dots-Doped Electrospun Fibers for Simultaneous Metal Ion Detection and Adsorption of Dyes

Oliveira

Pires

et al. 2020

Adv. Fiber Mater.

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The required treatment and monitoring of contaminants in wastewater reinforces the development of low-cost adsorbents/ chemosensors, introducing advantages relative to the detection/removal of toxic metals and dyes. Herein, it is reported a two-step process of fabrication of fluorescent carbon dots via the hydrothermal treatment of amino acids for the following encapsulation in electrospun fibers. The prominent anionic behavior of electrospun fibers of Eudragit L100 was explored for adsorption of cationic dyes (methylene blue and crystal violet)-with the prevailing electrostatic interaction of parts being favored by the formation of monolayers on the surface of adsorbents. On the other hand, the controlled release of carbon dots (CDs) from fibers to the reactor can be explored for a second application: the nitrogen ligands from released glycinebased carbon dots can be explored to indicate the presence of metal ions in aqueous solution. Our experiment resulted in a quenching in the fluorescence of the CDs in order of 90% in the emission of particles in the response of the presence of Fe 3+ ions, characterizing a promising perspective for this experimental system.

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Adsorption and identification of traces of dyes in aqueous solutions using chemically modified eggshell membranes

Cited by 21 publications

References 44 publications

Highly Porous Hydroxyapatite/Graphene Oxide/Chitosan Beads as an Efficient Adsorbent for Dyes and Heavy Metal Ions Removal

Highly Porous Hydroxyapatite/Graphene Oxide/Chitosan Beads as an Efficient Adsorbent for Dyes and Heavy Metal Ions Removal

Metal nanoparticles/carbon dots nanocomposites for SERS devices: trends and perspectives

Carbon Dots-Doped Electrospun Fibers for Simultaneous Metal Ion Detection and Adsorption of Dyes

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