Authors :
Arnaldi Dwi Laksita; Nita Aryanti
Volume/Issue :
Volume 8 - 2023, Issue 1 - January
Google Scholar :
https://bit.ly/3IIfn9N
Scribd :
https://bit.ly/3Wzve17
DOI :
https://doi.org/10.5281/zenodo.7571380
Abstract :
Excessive use of surfactants in metal waste
treatment by the MEUF process resulted a secondary
pollution. To overcome the problem, the combination of
the acidification method followed by ultrafiltration is an
efficient and simple surfactant recovery method. This
research studied the effect of pH value on surfactant
recovery, metal ion rejection and surfactant micelle
formation at low surfactant concentrations. The retentate
solution that will be recovered is obtained through the
initial MEUF process using Sodium Dodecyl Sulphate
(SDS) with an initial concentration of 7 mM less than the
Critical Micelle Concentration (CMC), Cu2+ metal ion
solution used as the pollutant feed. The recovery process
carried out at various pH, namely 3; 2; 1 and 0,5. The
separation between metal ions and surfactants increased
as the pH value decreased. Optimal surfactant recovery at
pH 0,5 with a value of recovery surfactant of 61% and
metal ion rejection of 72%. The formation of micelle
affects the recovery process by ultrafiltration membranes.
At pH 0,5 the surfactant CMC value can decrease up to
69% compared with the pure SDS surfactants CMC value
(8,16 mM). The research shows that surfactant micelles
formed even under CMC value of pure surfactant by the
addition of acid.
Keywords :
MEUF; Acidification; Recovery; Surfactant.
Excessive use of surfactants in metal waste
treatment by the MEUF process resulted a secondary
pollution. To overcome the problem, the combination of
the acidification method followed by ultrafiltration is an
efficient and simple surfactant recovery method. This
research studied the effect of pH value on surfactant
recovery, metal ion rejection and surfactant micelle
formation at low surfactant concentrations. The retentate
solution that will be recovered is obtained through the
initial MEUF process using Sodium Dodecyl Sulphate
(SDS) with an initial concentration of 7 mM less than the
Critical Micelle Concentration (CMC), Cu2+ metal ion
solution used as the pollutant feed. The recovery process
carried out at various pH, namely 3; 2; 1 and 0,5. The
separation between metal ions and surfactants increased
as the pH value decreased. Optimal surfactant recovery at
pH 0,5 with a value of recovery surfactant of 61% and
metal ion rejection of 72%. The formation of micelle
affects the recovery process by ultrafiltration membranes.
At pH 0,5 the surfactant CMC value can decrease up to
69% compared with the pure SDS surfactants CMC value
(8,16 mM). The research shows that surfactant micelles
formed even under CMC value of pure surfactant by the
addition of acid.
Keywords :
MEUF; Acidification; Recovery; Surfactant.
