Extraction of Sudan dyes from environmental water by hemimicelles-based magnetic titanium dioxide nanoparticles

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.

Adsorption of Sudan-IV contained in oily wastewater on lipophilic activated carbons: kinetic and isotherm modelling

“…In another study (Sun et al 2015), dealing with the removal of different Sudan dyes from an aqueous solution by magnetic carbon nanotubes, a maximum adsorption of 18.8679 mg g −1 was achieved with S-IV at 45°C (determined from the Langmuir isotherm model). A part of other study (Li et al 2014) reveals that it is possible to achieve an adsorption equilibrium of S-IV (970.87 μg g −1 ) onto ferromagnetic titanium dioxide nanoparticles (determined by the pseudo-second-order kinetic adsorption). However, the aim of those works was not the treatment of wastewater or polluted organic solvents.…”

Electromagnetic dispersive solid‐phase extraction based on polyaniline‐coated magnetite/silica materials for the determination of Sudan red I in drinks

“…Based on the LOD, recoveries, adsorption dose, and time required for magnetic extraction, the proposed EM‐DSPE‐HPLC method was compared with some published MSPE techniques for Sudan red I determination, as shown in Table 1 [6,25,36–41]. The good recoveries, short extraction time were acquired with the EM‐DSPE‐HPLC method, indicting EM‐DSPE as an ideal preconcentration method.…”

Preparation of Polyamidoamine Dendrimer Modified Magnetic Nanoparticles and Its Application for Reliable Measurement of Sudan Red Contaminants in Natural Waters at Parts-Per-Billion Levels

“…Noticeably, SPE is regarded as a cost-effective tool due to its simplicity, high preconcentration, and low consumption of organic toxic solvents ( Dibaei et al, 2016 ). Recently, there has been a growing interest in magnetic solid phase extraction (MSPE) due to its favorable properties including the small dosage of the adsorbent, simplicity, easy separation, and saving time ( Gong et al, 2017 ; Li et al, 2014 ). As a reliable method, MSPE has been successfully used to preconcentrate environmental pollutants such as phthalate esters, polycyclic aromatic hydrocarbons, lignin, and heavy metal ions ( Wu et al, 2017 ; Zhou et al, 2017 ; Wu et al, 2019 ; Yuan et al, 2020 ).…”