چكيده به لاتين
This thesis is divided into two sections. In the first section, the objective is the removal of the analyte Methylene Blue using the electrospun microextraction method. In the second section of this thesis, the aim is the extraction and measurement of Methylene Blue in a water sample and two industrial wastewater samples. One of the greatest challenges humanity faces today is water pollution and its depletion. Therefore, water and wastewater treatment and the removal of contaminants have become one of the most significant issues in contemporary society, attracting considerable attention. In this method, a polymer composed of polyacrylonitrile/polydimethylsiloxane/titanium dioxide is employed as an adsorbent, creating a three-dimensional cage-like structure through electrospinning of the polymer. This three-dimensional adsorbent structure significantly enhances the removal efficiency of the analyte compared to its flat counterpart. After optimizing the parameters affecting this method using Design-Expert software, up to 90% of Methylene Blue analyte was removed from the aqueous solution. Sample preparation is one of the most critical stages in analytical experiments, significantly affecting the results. The goal of this stage is to modify the desired sample and provide better and more suitable conditions for experimentation to achieve more desirable results. Factors such as speed, simplicity, high sensitivity, good selectivity, high efficiency, suitable repeatability, low consumption of organic solvents, and the ability for continuous automation with an analytical instrument are among the important considerations in selecting an analytical method. Electro membrane extraction (EME) is one of the new sample preparation methods. The objectives of the EME technique include reducing the consumption or elimination of organic solvents, reducing sample volume, decreasing analysis time and operational costs, the ability to investigate highly polar ionic compounds, generating low flows, selective extraction, eliminating the high ionic strength of biological samples, rapid kinetics with precise control, and the use of renewable adsorbents. In the second part of this thesis, electrospun poly(caprolactone), a biocompatible polymer, is used as a membrane in electro membrane extraction of Methylene Blue, and other parameters influencing the method are optimized using a one-factor-at-a-time approach.)
