Комплексные геофизические исследования с целью доразведки юго-западного фланга уранового месторождения Харасан (республика Казахстан)

Цель работ: Комплексные геофизические иследования с целью доразведки юго-заподного фланга уранового месторождения Харасан (республика Казахстан) Объект работ: Участок Байкенже месторождения Харасан, локализованный в горизонте верхнего мела на глубинах от 610 м до 690м. Методы решения задач: анализ и обобщение геолого-геофизических материалов. На территории «Харасан» для решения геологических задач применяется комплекс геофизических методов исследования скважин. При этом, гамма-каротаж, электрокаротаж, инклинометрия выполнялись во всех скважинах, независимо от их целей, задач и назначения. Дополнительные геофизические методы, такие как каротаж мгновенных нейтронов деления (КНД-М), кавернометрия, проводятся выборочно.Purpose of work: Integrated geophysical isledovanija for the purpose of further exploration of the south- west- side attack Kharassan uranium deposit (Republic of Kazakhstan ) Object of work: Planning Baykenzhe Kharassan deposits localized in the Upper Cretaceous horizon at a depth of 610 m to 690m . Methods for solving problems : analysis and synthesis of geological and geophysical data . On " Kharassan " territory for solving complex geological tasks used geophysical methods for wells .At the same time , gamma ray , electric logging , directional survey carried out in all wells , regardless of their objectives , tasks and appointments . Additional geophysical methods , such as logging prompt fission neutron ( CPV -M ) , caliper , conducted selectively

Comparison of one-time spiking, multiple spiking and dialysis tubing methods for the determination of plastic-water partition coefficient of one polycyclic hydrocarbons on microplastic

Determination of sorption capacity of persistent organic pollutants (POPs) on microplastics (MPs) is essential to study ecological effect of POPs-loaded MPs in the aqueous environment. However, due to high octanol-water partition coefficients (Kow) as well as low water solubility, determination of sorption capacity of POPs on MPs in the laboratory is challenging. Here we present three methods to determine plastic-water partition coefficient of phenanthrene (Phen), one of polycyclic aromatic hydrocarbons (PAHs), on low-density polyethylene (LDPE). Sorption tests were implemented in batch tests in the laboratory using conventional one-time and multiple spiking methods as well as a cellulose dialysis tubing method. The plastic samples tested here are LDPE pellets with a low amount of additives. For the one-time spiking test, a high concentration of Phen in ethanol was spiked in a 2.5L glass bottle containing MilliQ-water and shaken. The well-mixed solution was placed into several smaller reactors and LDPE was added. For the multiple spiking test, batch reactors containing LDPE and MilliQ-water were prepared. A high concentration of Phen in ethanol was injected repeatedly into each batch reactor until the concentration became stable. For the dialysis tubing test, a closed dialysis tubing containing LDPE and MilliQ-water was placed in each batch reactor filled with MilliQ-water with Phen far above solubility. The water concentration outside of the tubing was expected to stay constant during the entire experiment. The concentration in the water phase for the first two tests as well as in the dialysis tubing for the third test was monitored using high performance liquid chromatography (HPLC). When the adsorption of Phen was completed, Phen on LDPE was to be extracted and quantified. Sorption capacity of Phen was derived from the experiments and methods were compared. PE-water partition coefficient of Phen were derived based on the sorption capacity using adsorption models. TU Darmstadt and CARAT are participants of an EU project „PLASTOX“, a consortium of a JPI Ocean’s Joint Action