Abstract
In the present study, the potential of Salvinia molesta for biodecolorization of methyl orange (MO) dye from water was examined. Six glass vessels were filled with 4 L of water contaminated with MO with three concentrations (5, 15, and 25 mg/L), three with plants and another three without plant as contaminant control. The influence of operational parameters, including initial dye concentration, pH, temperature, and plant growth, on the efficacy of the biodecolorization process by S. molesta was determined. Temperature and pH was in the range of 25–26 °C and 6.3 to 7.3, respectively. Phytotransformation was monitored after 10 days through Fourier transform infrared (FTIR) spectroscopy, and a significant variation in the peak positions was demonstrated when compared to the control plant spectrum, indicating the adsorption of MO. The highest biodecolorization was 42% in a 5 mg/L MO dye concentration at pH 7.3 and at 27 °C. According to the FTIR results, a potential method for the biodecolourization of MO dye by S. molesta was proven. Salvinia molesta can be successfully used for upcoming eco-friendly phytoremediation purposes for dye removal.
Highlights
Of methylene blue using Azolla pinnata, with 85% removal
The solution pH in the glass vessel with plants and without plant were in the range of pH 6.3–7.3, demonstrating the suitable pH needed for growth and activity of S. molesta, especially for dye removal
According to a study conducted by Yaseen and S cholz[37], pH has no obvious influence in phytoremediation with S. molesta
Summary
Phytoremediation was employed to removal toxic dyes and to perform decolorization with biological degradation p rocesses[29]. The floating plant Salvinia molesta was selected to explore the ability of the plant to decolourize methyl orange (MO) dye. The plant structure of S. molesta is a free-floating fern with rootless stems and hairy roots. Much research deals with floating plants, which are highly tolerable to many environmental contaminants, such as heavy metals and h ydrocarbons[32,33], but few studies have shown that the plants have the ability to biodecolorize textile d yes[2,34]. The aim of this research was to explore the ability of Salvinia molesta to decolourize MO dye in synthetic wastewater
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