Biopolymers for dye removal via foam separation

Groß, M.; Lima, Michelle Tupinamba; Uhlig, Martin; Ebraheme, A.; Roeber, O.; Olschewski, B.; Klitzing, Regine von; Schomäcker, Reinhard; Schwarze, Michael

doi:10.1016/j.seppur.2017.07.025

Cited by 43 publications

(11 citation statements)

References 30 publications

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“…The flotation technique was originally applicable in the mineral processing practices to extract minerals and particulate solids from water. The application of these techniques mainly comprises the treatment of heavy metals and dyes containing water and wastewater (Deliyanni et al, 2017;Gross et al, 2017). The efficiency of floatation techniques are dependent on the surface properties of different particles, pH value, temperature, current density, initial dye concentration, ionic strength, and stirring speed (El-Hosiny et al, 2017).…”

Section: Flotation Techniquesmentioning

confidence: 99%

Biomass-Based Adsorbents for Removal of Dyes From Wastewater: A Review

Aragaw

Bogale

2021

Front. Environ. Sci.

107

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Dyes, especially azo dyes contained in wastewaters released from textile, pigment, and leather industries, are entering into natural waterbodies. This results in environmental deterioration and serious health damages (for example carcinogenicity and mutagenesis) through food chains. Physiochemical, membrane processes, electrochemical technology, advanced oxidation processes, reverse osmosis, ion exchange, electrodialysis, electrolysis, and adsorption techniques are commonly used conventional treatment technologies. However, the limitations of most of these methods include the generation of toxic sludge, high operational and maintenance costs. Thus, technological advancements are in use to remediate dyes from effluents. Adsorption using the nonconventional biomass-based sorbents is the greatest attractive alternatives because of their low cost, sustainability, availability, and eco-friendly. We present and reviewed up-to-date publications on biomass-based sorbents used for dye removal. Conceptualization and synthesizing their state-of-the-art knowledge on their characteristics, experimental conditions used were also discussed. The merits and limitations of various biosorbents were also reflected. The maximum dye adsorption capacities of various biosorbents were reviewed and synthesized in the order of the biomass type (algae, agricultural, fungal, bacterial, activated carbon, yeast, and others). Surface chemistry, pH, initial dye concentration, temperature, contact time, and adsorbent dose as well as the ways of the preparations of materials affect the biosorption process. Based on the average dye adsorption capacity, those sorbents were arranged and prioritized. The best fit of the adsorption isotherms (for example Freundlich and Langmuir models) and basic operating parameters on the removal dyes were retrieved. Which biomass-based adsorbents have greater potential for dye removal based on their uptake nature, cost-effectiveness, bulk availability, and mono to multilayer adsorption behavior was discussed. The basic limitations including the desorption cycles of biomass-based adsorbent preparation and operation for the implementation of this technology were forwarded.

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Section: Flotation Techniquesmentioning

confidence: 99%

Biomass-Based Adsorbents for Removal of Dyes From Wastewater: A Review

Aragaw

Bogale

2021

Front. Environ. Sci.

107

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“…The foam, together with the removed matter, is collected from the top of the floatation system. There are many examples in the literature, often to remove contaminants from water, e.g., dyes [37,38]. Bubble size and rise velocity are important parameters to design an efficient flotation process [39] but the surfactant concentration must be considered, too.…”

Section: Flotationmentioning

confidence: 99%

Recycling of Catalysts from Surfactant Systems

Schwarze

2020

Chemie Ingenieur Technik

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This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. Dedicated to Prof. Dr.-Ing. Matthias Kraume on the occasion of his 65th birthday Surfactant systems belong to the green solvents and can be used as reaction media for very different stoichiometric and catalytic reactions. The possibilities to separate catalysts and products afterward are very diverse. This overview article illustrates the different possibilities, with selected examples. There is no general separation concept, but the separation method has to be chosen according to the selected reaction system.

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“…However, for anionic dyes, a further cationic surfactant, DTAB, should be added; the removal can thus be increased from 5% to 70%. 51 Hu et al also used ion otation technology to remove methylene blue using commercial hydrophobic silica nanoparticles (SNP) (200.0 AE 10.0 nm average particle size) as a collector without using any surfactants. Removal efficiencies of methylene blue and SNPs and volume ratios of 91.1 AE 4.6%, 93.9 AE 4.7%, and 10.5 AE 0.5% could be respectively obtained at pH 9.0, a SNP concentration of 600 mg L À1 , an anhydrous ethanol dosage of 8 ml and a otation column height of 600 mm.…”

Section: Wastewater Treatmentmentioning

confidence: 99%