The Role of Internal Droplet Size on Emulsion Stability and the Extraction Performance of Kraft Lignin Removal from Pulping Wastewater in Emulsion Liquid Membrane Process

It has been discovered that the size of internal droplets in primary emulsion determines emulsion dispersion and stability in emulsion liquid membrane (ELM) process for removal of lignin from pulping wastewater. Generally, primary emulsion contains kerosene, Aliquat 336, sodium bicarbonate, as well...

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Bibliographic Details
Published in:Journal of dispersion science and technology 2016-04, Vol.37 (4), p.544-554
Main Authors: Ooi, Zing-Yi, Othman, Norasikin, Choo, Ching-Li
Format: Article
Language:English
Subjects:
Aliquat
Dispersions
Droplets
Emulsion liquid membrane
Emulsions
Extraction
internal droplet size
kraft lignin removal
Pulping
pulping industry
stability
Surfactants
Wastewater treatment
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Summary:It has been discovered that the size of internal droplets in primary emulsion determines emulsion dispersion and stability in emulsion liquid membrane (ELM) process for removal of lignin from pulping wastewater. Generally, primary emulsion contains kerosene, Aliquat 336, sodium bicarbonate, as well as Span 80 as diluent, carrier, internal phase, and surfactant, respectively. Hence, this study had looked into the parameters, including concentration of surfactant, carrier, and stripping agent; emulsification speed and time; as well as agitation speed and time. As a result, the diameter of the smallest droplets (1.4 µm) was formed with maximum lignin extraction (95%), minimum swelling (5%) at 3% (w/v) surfactant concentration, 12,000 rpm of emulsification within 5 minutes, 0.01 M of Aliquat 336, 0.1 M of NaHCO 3, and 250 rpm of extraction within 10 minutes.
ISSN:0193-2691
1532-2351
DOI:10.1080/01932691.2015.1050728