چكيده به لاتين
Methylene Blue, also known as Thioninium chloride, is an aromatic heterocyclic chemical compound with the chemical formula C16H18N3SCl. This compound is one of the cationic dyes widely used in various industries. However, despite its numerous applications, Methylene Blue is considered a hazardous chemical in industrial wastewater due to its adverse effects on water resources, the environment, and human and aquatic health.To separate and remove Methylene Blue from wastewater, an electrospun extraction method using visible-ultraviolet spectrophotometry has been employed. In this method, a water-resistant membrane composed of PAN/PDMS/TiO2 electrospun fibers is used for Methylene Blue separation. Electrospun nanofiber membranes are chosen for their cost-effectiveness, simplicity, ease of scalability, and wide applicability, making them a reliable choice. The optimized conditions for this process are as follows: - Voltage: 35 volts - pH of the donor phase: 4 - pH of the receiving phase: 4 - Stirring speed of the solution: 1500 revolutions per minute - Volume of the receiving phase: 2 milliliters - Volume of the donor phase: 6 milliliters - Extraction time: 20 minutes Furthermore, in this method, the calibration range for Methylene Blue has been obtained in the range of 0/5 to 10Micrograms per milliliter, with correlation coefficients exceeding 99.0%. The repeatability of the method has been demonstrated under various conditions and at two concentration levels of 1 and 5 Micrograms per milliliter, with relative standard deviations of 3.39%, 5.2%, and6.8% for one day, several days, and membrane-to-membrane, respectively. Additionally, the method's detection and quantification limits are 0.039 and 0.131 nanograms per milliliter, respectively. Two industrial wastewater samples have been used as real samples, resulting in a recovery percentage of 96% and 98%.
