Malachite green removal using ionic flocculation

Malachite green removal using ionic flocculation

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 remo...

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Bibliographic Details
Published in:Water practice and technology Vol. 17; no. 5; pp. 1113 - 1128
Main Authors: Teixeira, Y. N., Melo, R. P. F., Fernandes, M. R., Carmo, S. K. S., Neto, E. L. Barros
Format: Journal Article
Language:English
Published: London IWA Publishing 01-05-2022
Subjects:
Adsorbents
Adsorption
Alcohol
Aquaculture
Calcium
Centrifugation
Centrifuging
Dyes
Efficiency
Effluents
Electrolytes
Energy
Equilibrium
Flocculation
ionic flocculation
isotherms
kinetics
Malachite green
Pollutant removal
Pollutants
Removal
surfactant
Surfactants
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Summary: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.
ISSN:1751-231X
1751-231X
DOI:10.2166/wpt.2022.054