The paper represents the research results for the process of crude oil-contaminated soil neutralization with the use of a neutralizer obtained on the basis ofhumic substances. Using physical methods (gas and liquid chromatography, fluorimetry, atomic absorption spectrometry, IR spectrometry), the element and group compositionswere determined for the crude oil-contaminated soil, neutralizer, and neutralized soil. Optimal parameters were determined for the process of the crude oil-contaminated soil neutralization under laboratory conditions:weight ratios of the crude oil-contaminated soil, neutralizer and water, and the temperature and neutralization process duration. The technological scheme was developed for the neutralization of the crude oil-contaminated soil in field conditions. It was found that low-boiling point hydrocarbon fractions (C₁₂–C₁₇) disappear completely at neutralization, the content of high-boiling point hydrocarbon fractions (C₂₀–C₂₃) is essentially increased, and the content of oil components and metals, including the toxic ones, is decreased. The engineering characteristics for nine mixtures of the stabilized soil, containing the neutralized soil, were evaluated under laboratory conditions and the conditions were determined for their use in road construction (with regard to road category, characteristic pavement layer, minimal air temperature). An experimental road section was constructed with the use of the stabilized soil with neutralized soil (40%).

The sorption properties of a modified ethylenediamine humate (EDA–H) sorbent toward Co2+ and Ni2+ metal ions are considered. The results of the influ

The growing depletion of conventional crude oil resources has intensified interest in unconventional hydrocarbon feedstocks such as oil sands and natural bitumen. This study presents an integrated recovery and upgrading of oil sands bitumen from the Karasyaz–Taspas deposit: process development and product characterization. Experimental investigations included bitumen extraction, atmospheric and vacuum distillation, and comprehensive physicochemical characterization (density, viscosity, elemental composition, and SARA fractions). The extraction process achieved a recovery efficiency of up to 98%, demonstrating the effectiveness of the applied approach under mild temperature conditions. The obtained results indicate that the bitumen is characterized by a balanced fractional composition with a significant yield of middle distillates and oil fractions, which makes it a promising feedstock for the production of fuels, base oils, and bituminous materials. A process flow scheme integrating extraction, fractionation, and upgrading stages is proposed and discussed from a technological perspective. The study provides a practical assessment of the applicability of nitrite-based extraction systems for oil sands processing and highlights the potential for implementing modular processing units under field conditions. The findings contribute to the development of resource-efficient approaches for the utilization of Kazakhstan’s unconventional hydrocarbon resources.