Abstract
A novel method for the extraction of Sudan dyes including Sudan I, II, III, and IV from environmental water by magnetic titanium dioxide nanoparticles (Fe3O4@TiO2) coated with sodium dodecylsulfate (SDS) as adsorbent was reported. Fe3O4@TiO2 was synthesized by a simple method and was characterized by transmission electron microscopy, Fourier-transform infrared spectrometry, and vibrating sample magnetometer. The magnetic separation was quite efficient for the adsorption and desorption of Sudan dyes. The effect of the amount of SDS, extraction time, pH, desorption condition, maximal extraction volume, and humic acid on the extraction process were investigated. This method was employed to analyze three environmental water samples. The results demonstrated that our proposed method had wide linear range (25–5,000 ng L−1) with a good linearity (R 2 > 0.999) and low detection limits (2.9–7.3 ng L−1). An enrichment factor of 1,000 was achieved. In all three spiked levels (25, 250, and 2,500 ng L−1), the recoveries of Sudan dyes were in the range of 86.9–93.6 %. The relative standard deviations obtained were ranging from 2.5 to 9.3 %. That is to say, the new method was fast and effective for the extraction of Sudan dye from environmental water.
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This work was supported by the Fundamental Research Funds for the Central Universities (No. 2572014EB06) and National Natural Science Foundation of China (No. 21205010).
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Li, C., Chen, L. & You, X. Extraction of Sudan dyes from environmental water by hemimicelles-based magnetic titanium dioxide nanoparticles. Environ Sci Pollut Res 21, 12382–12389 (2014). https://doi.org/10.1007/s11356-014-3153-8
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DOI: https://doi.org/10.1007/s11356-014-3153-8