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Information × Registration Number 0224U033401, (0123U103183) , R & D reports Title Concentration of ecotoxicants on sorbents for their removal from water and (or) further analytical determination popup.stage_title Визначення умов концентрування перхлорат-іонів для вилучення з водних середовищ і ґрунтів та/ або аналітичного визначення Head Mazna Yuliia I., к.х.н. Registration Date 26-12-2024 Organization National Academy of Sciences of Ukraine A.V.Dumansky Institute of Colloid Chemistry and Water Chemistry popup.description1 Development and improvement of methods of concentration of ecotoxicants of organic and inorganic nature to improve the sensitivity and selectivity of their determination in environmental objects with further application in ecological monitoring and ecotechnologies of water environment purification and soil remediation. popup.description2  The purpose of the work was to develop and improve methods for preconcentrating organic and inorganic ecotoxicants to improve the sensitivity and selectivity of their determination in environmental objects with subsequent use in environmental monitoring and ecotechnologies for water purification and soil remediation. Research methods are spectrophotometric, sorption, fluorimetric. In the presented work, the efficiency of phenol preconcentration by sorption on magnetic Fe3O4 nanoparticles in the absence and presence of HCl was assessed. In a wide concentration interval, a correlation was experimentally established between the sorption properties, pH, redox potential, specific electrical conductivity and structural characteristics (amount and size of optical inhomogeneities) of aqueous phenol solutions. All the studied concentration dependencies have a nonlinear stepwise nature (or clearly expressed extrema). Critical concentrations were established for the studied concentration dependencies, which correlate well with each other. In addition, the selectivity of various organic dyes for the extraction of perchlorate ions from aqueous solutions in the form of ionic associates was assessed and the efficiency of the separation of perchlorates in the form of ion pairs from model aqueous solutions on solid surfaces of sorbents without the use of extraction with an organic solvent was determined. The influence of macro- and microcomponents of soils on the determination of perchlorate ions by diffuse reflectance spectroscopy was determined. The best reagents and the methods developed on their basis were used to determine perchlorate ions in soils. Product Description popup.authors Hubetska Tetiana S. popup.nrat_date 2024-12-26 Close