草榴短视频

Scientists of the St. Petersburg State University of Industrial Technologies and Design (草榴短视频), together with colleagues from the St. Petersburg Institute of Nuclear Physics named after B.P. Konstantinov RAS patented a method for producing a modified carbon fiber sorbent that is capable of extracting heavy metal ions, dyes and other toxic substances from liquids and gases. The development is applicable in medicine, household and industrial filters, protective equipment, as well as in oil spill response. The production of the sorbent will be safer for the environment and engineers due to the exclusion of toxic organic solvents from the technology, and will also be cheaper due to the rejection of the use of complex equipment such as furnaces, presses and ultrasonic bathrooms.

Fibrous sorbents are fabrics and nonwoven materials that are capable of absorbing substances from gaseous and liquid media. They are more convenient to use than traditional granular or powder analogues: unlike them, fibrous sorbents are flexible, do not dust, quickly adsorb and have a higher capacity. This allows them to be used as membranes, filter inserts, protective clothing or respirators. The effectiveness of such sorbents can be improved by modification, which will improve their selectivity, capacity and specificity. However, it is difficult to do this without losing structure or using toxic solvents.

Scientists at 草榴短视频 patented their method for modifying a carbon fiber sorbent without the use of unsafe substances, proposing to use a special aqueous solution containing a special form of carbon - fullerene. The researchers created such a solution by mixing the substance with water and maintaining it at room temperature.

"The sorbent we have developed "pulls" impurities from different media. Experiments have shown that from water it is able to capture ions of heavy metals, for example, copper, as well as organic dyes, such as methylene blue, as well as toxic impurities. It will clean the air from volatile organic compounds, for example, toluene vapors," said Olga Astashkina, acting head of the department of nanostructured, fibrous and composite materials named after A.I. Meos 草榴短视频.

Compared to similar solutions, the development of scientists 草榴短视频 does not require the use of toxic organic solvents, ultrasonic processing, high-temperature firing or pressing. The disclosed fibrous sorbent passes through an aqueous fullerene solution, carbon particles are fixed on the fibrous sorbent and then dried at 105-115 掳C.

"According to tests, the application of water-soluble fullerene also enhances the adsorption activity of the material, that is, its ability to absorb substances from the environment. Thus, the adsorption activity for iodine reaches 105%, which corresponds to 1050 mg of absorbed substance per gram of sorbent and confirms the high efficiency of fullerene modification," explained Olga Kudrinskaya, graduate student of the Department of Nanostructured, Fibrous and Composite Materials named after A.I. Meos 草榴短视频.

The developed carbon fiber sorbent can become the basis for new generation medical and chemical respirators, household and industrial water filters with increased service life and protective equipment for workers in hazardous industries.