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Removal and recovery of chromium(VI) ion via Tri-n-octyl methylammonium chloride-kerosene polypropylene supported liquid membrane
Raja Norimie Raja Sulaiman1, Norasikin Othman2.
The presence of chromium in the natural water can be toxic to aquatic organism and is one of the major environmental problems.
Therefore, the removal and recovery of chromium from industrial wastewater is very crucial to accomplish the standard
discharge concentration limit. Supported liquid membrane is one of the processes which combines the extraction and recovery
process in one single stage. This paper presents an experimental study on the removal and recovery of chromium ions from
acidic aqueous solutions through a flat-sheet supported liquid membrane (FSSLM) system. Through this system, chromium ions
were transported from feed phase into stripping phase via Tri-n-octyl-methylammoniumchloride (TOMAC)-kerosenepolypropylene
supported liquid membrane (SLM). The liquid membrane phase was prepared by dissolving the corresponding
volume of the carrier, TOMAC in organic diluent of kerosene. The stripping agent used was sodium hydroxide (NaOH) solution
whereas the membrane support used was commercial Accurel polypropylene membrane with good features of 100 µm thickness,
porosity of 72% and effective pore size of 0.10 µm. The chromium ion concentration in the feed and stripping phases as a
function of time was analysed using an atomic absorption spectrometry (AAS). The effects of different operational variables
such as TOMAC concentration in the membrane phase, NaOH concentration in the stripping phase and pH of the aqueous feed
phase were investigated. The result demonstrated that about 90 and 98% of 150 ppm of chromium was removed and recovered,
respectively at favorable condition of 1.0 M TOMAC, 0.5 M NaOH and pH 2 of the feed phase.
Affiliation:
- Universiti Teknologi Malaysia, Malaysia
- Universiti Teknologi Malaysia, Malaysia
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Indexation |
Indexed by |
MyJurnal (2019) |
H-Index
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0 |
Immediacy Index
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0.000 |
Rank |
0 |
Indexed by |
Scopus (SCImago Journal Rankings 2016) |
Impact Factor
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0 |
Rank |
Q4 (Analytical Chemistry) |
Additional Information |
0.152 (SJR) |
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