Removal of Reactive Blue 19 using nonionic surfactant in cloud point extraction

Melo, Ricardo Paulo Fonsêca; Neto, Eduardo Lins de Barros; Moura, M. C. P. A.; Dantas, Tereza Neuma de Castro; Neto, Afonso Avelino Dantas; Oliveira, Humberto Neves Maia de

doi:10.1016/j.seppur.2014.10.009

Cited by 40 publications

(15 citation statements)

References 28 publications

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“…Surfactants were tested as separation agents in a number of processes, such as cloud point extraction (Melo et al 2014), microemulsion (Beltrame et al 2005) and micellar ultrafiltration (Ahmad et al 2006). Another promising process is ionic flocculation, in which low-cost surfactants are used.…”

Section: Graphical Abstract Introductionmentioning

confidence: 99%

Malachite green removal using ionic flocculation

Teixeira

Melo

Fernandes

et al. 2022

Water Practice and Technology

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The use of ionic flocculation is proposed to remove malachite green (MG), in this case, from water. A surfactant with the polluted solution and calcium is added. The surfactant-calcium reaction forms a precipitate, which aggregates into flocs on agitation. The flocs adsorb MG, which can then be removed by centrifugation. Ionic flocculation was assessed by varying parameters including: surfactant and MG concentrations, electrolyte content, pH, contact time, etc. The isotherm and adsorption kinetic models that best fit this process are the Langmuir and pseudo-second order models, respectively. MG removal efficiency of 96% was obtained at pH 9, with surfactant concentration 1,400 mg L−1, MG concentration 10 mg L−1 and contact time 10 minutes. The process has potential for pollutant removal.

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Section: Graphical Abstract Introductionmentioning

confidence: 99%

Malachite green removal using ionic flocculation

Teixeira

Melo

Fernandes

et al. 2022

Water Practice and Technology

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“…Over the past decades, nanometric materials have been widely used for high-efficiency photocatalytic applications. Heterogeneous photocatalysis is a process that involves the degradation of organic compounds through the formation of hydroxyl radicals on the surface of semiconductor materials by irradiation of sunlight or artificial light [10,11]. The photocatalytic behavior of TiO 2 supported by Mo 2 C in vapor phase decomposition of formic acid was studied, where Mo 2 C prepared with TiO 2 increased the extent of photocatalytic decomposition exhibited by pure TiO 2 , with dehydrogenation and dehydration reactions occurring at the same time [12,13].…”

Section: Introductionmentioning

confidence: 99%

Molybdenum carbide doped with nanostructured nickel for application in degradation of reactive dyes

et al. 2020

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Carbide-type ceramic materials such as nickel-doped molybdenum carbide have promising photocatalytic degradation activity. The addition of nickel to the molybdenum carbide aims to increase its reaction yield and also its characteristics. The objective of this paper was to study the photocatalytic activity of Mo2C and 5% and 10% nickel-doped Mo2C materials used for the degradation of the Maxilon Blue GRL 300 textile dye. The structural properties were characterized by X-ray diffraction and scanning electron microscopy. For the determination of band gap energy, diffuse reflectance spectroscopy was used. The samples of the photocatalysis tests were analyzed by UV-visible spectroscopy. The best reaction yield was observed for the 5% nickel-doped molybdenum carbide sample in photocatalytic tests, reaching a yield of around 92% in the final concentration of the dye solution.

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“…For decades, scientists have proposed many ways to deal with dyeing wastewater, such as ozone oxidation [4], extraction [5], flocculation [6], filtration [7] and electrochemical methods [8], as well as 2 of 13 fungal decolorization by microbial degradation [9]. The ozone oxidation and the electrochemical method can destroy the dye quickly and remove the macromolecular organic matter from the wastewater, to effectively remove the refractory organic matter in different wastewaters [10,11].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Porous Fe/C Bio-Char Adsorbent for Rhodamine B from Waste Wood: Characterization, Kinetics and Thermodynamics

et al. 2019

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In the past decades, dyes waste waters produced from industries have become a major source of environmental pollution causing the destruction of aquatic communities in the ecosystem and greatly threatened human health. Herein, a novel magnetic adsorbent was synthesized by carbonizing iron (III) 2,4-pentanedionate (Fe(acac)3) pre-enriched forestry waste wood at a pyrolysis temperature of 1000 °C. The characterization of the adsorbent conducted via SEM, EDS, VSM, XRD, XPS, and FT-IR spectroscopy. The adsorption trend followed the pseudo-second order kinetics model. The corresponding adsorption performance was efficient with an equilibrium time of only 1 min. Affect factors on the adsorption performance, such as adsorbent dosage, contact time and temperature, were investigated. The magnetic bio-char showed a high adsorption capacity and an efficient adsorption toward RhB, implying great potential application in the treatment of colored wastewaters.

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Removal of Reactive Blue 19 using nonionic surfactant in cloud point extraction

Cited by 40 publications

References 28 publications

Malachite green removal using ionic flocculation

Malachite green removal using ionic flocculation

Molybdenum carbide doped with nanostructured nickel for application in degradation of reactive dyes

Synthesis of Porous Fe/C Bio-Char Adsorbent for Rhodamine B from Waste Wood: Characterization, Kinetics and Thermodynamics

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