Abstract:
The influence of temperature 011 the extraction and selectivity of naproxen, ibuprofen, and
triclosan by a thin-walled hollow fiber silicone rubber membrane was investigated.
Determination of the diffusion coefficients and flux values at 25, 40, and 60 degrees
Celsius was undertaken. The diffusion coefficient and flux were found to illcrease with
temperature. It W(tS also observed that at higher temperatures, mass transfer was
influenced by the amount extracted in the acceptor phase. However, diffusion from the
bulk donor phase through the hollow jiber silicone rubber membrane was shown to
control the transport of analytes at lower temperatures. When applied to wastewater, the
hollow jiber silicone rubber showed remarkable selectivity toward the analytes, However,
at high temperatures, the amount of matrix components extracted also increased slightly.
The amount extracted nearly doubled when extraction was performed at 40 degrees
Celsius compared to 25 degrees Celsius, indicating that temperature increased the
efficiency of the hollow fiber silicone rubber membrane. The application of the technique
to municipal wastewater showed remarkable selectivity and reproducibility, The
concentrations of these compounds were from 18.4 (1.37 percent} micrograms per liter
fOJ' triclosan to 1.1 (0.16 percent) micrograms per liter for naproxen ill the influent and
2.7 (0.29 percent} micrograms pel' liter for triclosan to 0.4 (0,01 percent) micrograms
pel' liter for naproxen in the effluent