Unpolarized Raman Spectra Shift in Solidified Oil-Water-Saltwater
DOI:
https://doi.org/10.55674/ias.v14i2.251839Keywords:
Transmittance, Absorbance, Raman Shift, Unpolarized Visible Spectrum, Polarizability; Dipole MomentAbstract
The study of unpolarized Raman spectral shifts in solidified oil-water-saltwater systems is crucial for understanding complex multiphase interactions under varying environmental conditions. Such systems are commonly found in natural and industrial processes, including oil spill remediation, geological formations, and desalination technologies. The need for detailed insights into molecular behavior and structural changes during solidification arises from the necessity to optimize these processes and mitigate environmental impacts. By analyzing Raman spectral shifts, this research provides essential information on the reorganization of molecular bonds and the influence of saltwater on oil-water interfaces, contributing significantly to environmental science, materials engineering, and energy resource management. The objective of this study is to analyze the transmittance, absorbance, and Raman shift spectra of water, soybean oil, and saltwater using an unpolarized visible spectrum at a low temperature of –10 °C. Experimental observations indicate that transmittance decreases with increasing wavelength, while absorbance increases. The transmittance and absorbance behaviors exhibit a nonlinear (bumping) pattern due to molecular rotational and vibrational effects. Additionally, intensity ratio analysis before and after the increase reveals two Gaussian peaks: one between 2 × 103 cm⁻¹ and 4 × 103 cm⁻¹ and another between 5 × 103 cm⁻¹ and 8 × 103 cm⁻¹ for water, soybean oil, and saltwater. The intensity ratio for water and the water-soybean oil-saltwater sample is higher when observed with Raman spectral shifts. This is due to the high polarizability of the molecules caused by molecular vibrations and dipole moments. At the considered temperature, in terms of transmittance, soybean oil exhibits the highest transmittance at higher wavelengths, making it the most efficient for light transmission. In contrast, saltwater has the highest absorbance at high wavelengths, meaning it absorbs more light compared to water and soybean oil.
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