The g-C3N4 (GCN) adsorbent with two different morphologies, coral (CGCN) and nano fiber (GCNNF), was synthesized and recruited for extraction and preconcentration of lead and copper metal ions by effervescent salt-assisted dispersive micro solid phase extraction procedure. The structures of the two adsorbents were affirmed by Fourier-transform infrared spectroscopy, X-ray diffraction, field emission scanning electron microscopy and Brunauer–Emmett–Teller analyses. The factors affecting the extraction efficiency were carefully studied and the optimum values of the parameters for both adsorbents were pH 6.5, adsorbent dosage 8 mg, desorption time 3 min, and the elution solvent 300 μL of 2 mol L−1 of HNO3. The detection limits of Pb(II (and Cu(II) ions for CGCN were 0.9 and 0.3 μgL−1 and for GCNNF were 1.56 and 0.7 μgL−1, respectively. The percent relative standard deviations were obtained to be 1.32% and 2.23% for CGCN (n = 3) and 1.24% and 2.29% for GCNNF (n = 3), respectively for the lead and copper metal ions. In addition, the adsorbents could be used up to 7 times without an imperative reduction in the percentages of analytes recovery. Finally, the performance of CGCN and GCNNF were used for preconcentrate of lead and copper ions in honey, canned fish, and human hair samples. © 2022 Taylor & Francis Group, LLC.

This article discusses the current problem of industrial waste disposal and its use in the production of building materials, which corresponds to the global concept of sustainable development. Attention is mainly paid to the development of a gruntosilicate composite (concrete) based on a mineral slag binder using drilling sludge from the mining industry, ashes from thermal power plants and electrothermophosphoric slag. Physico-chemical studies of man-made raw materials have been carried out, including analysis of chemical and mineralogical composition, granulometric characteristics, radiation safety and other parameters. It has been established that drilling mud, thermal power plant ash and electrothermophosphoric slag meet the requirements for use in building materials and belong to non-hazardous waste. The optimal ratios of the components in the composition of gruntosilicate concrete have been experimentally determined. The highest compressive strength (3.0–3.5 MPa) is achieved with a drilling mud content of 15–23% and a mineral slag binder of 10–20%. It is shown that the introduction of these wastes improves the structure of the material, reduces shrinkage deformations and ensures compliance with the requirements of road surfaces of the II–III classes. The use of industrial waste in construction will reduce the cost of raw materials by approximately 10–30%, reduce the environmental burden and solve the problem of waste disposal. The results of the study demonstrate the prospects of creating a waste-processing industry capable of processing up to 40% of industrial waste into building materials. © 2025 by the authors.

This article discusses the current problem of industrial waste disposal and its use in the production of building materials, which corresponds to the global concept of sustainable development. Attention is mainly paid to the development of a gruntosilicate composite (concrete) based on a mineral slag binder using drilling sludge from the mining industry, ashes from thermal power plants and electrothermophosphoric slag. Physico-chemical studies of man-made raw materials have been carried out, including analysis of chemical and mineralogical composition, granulometric characteristics, radiation safety and other parameters. It has been established that drilling mud, thermal power plant ash and electrothermophosphoric slag meet the requirements for use in building materials and belong to non-hazardous waste. The optimal ratios of the components in the composition of gruntosilicate concrete have been experimentally determined. The highest compressive strength (3.0–3.5 MPa) is achieved with a drilling mud content of 15–23% and a mineral slag binder of 10–20%. It is shown that the introduction of these wastes improves the structure of the material, reduces shrinkage deformations and ensures compliance with the requirements of road surfaces of the II–III classes. The use of industrial waste in construction will reduce the cost of raw materials by approximately 10–30%, reduce the environmental burden and solve the problem of waste disposal. The results of the study demonstrate the prospects of creating a waste-processing industry capable of processing up to 40% of industrial waste into building materials. © 2025 by the authors.

Water contamination has emerged as one of the fundamental factor for water shortage issue in the current era. As of now, different organic and inorganic pollutants are the main toxic components in water and are released from different sources. Metal Organic Frameworks (MOFs) have been developed in different fields because of their novel chemical, catalytic and structural advantages. These materials and their composites have gained much attention in recent years, both as effective sorbents and as photocatalysts, for removing several toxicants such as heavy metals and dyes from the waters and wastewaters. Nowadays, one of extensive research hotspots in these field is MOF derived carbonaceous materials for water detoxification. Among the presently explored materials for water treatment, MOF derived carbons have caused the establishment of great platforms for removal of several contaminations from water, by virtue of their appealing benefits like large pore volume, high porosity, high surface area, and chemical stability. In this review, we focused on different synthesis methods of MOFs and MOFs composites, and furthermore their carbon derived materials were discussed. In addition, applications of MOFs derived carbon materials for water detoxification was thoroughly discussed. More prominently, viewpoints towards exploitation of these developing advanced MOF derived carbon materials as catalytic routes were extensively summarized. © 2025 Elsevier B.V.

The development of durable and efficient membranes is essential for addressing environmental pollution caused by industrial oil spills and oily wastewater. This study presents a simple surface modification approach using a sol-gel dip-coating technique to fabricate hydrophobic cellulose membranes (CMs) for oil-water separation. Two silane agents—hexadecyltrimethoxysilane (HDTMS) and triethoxy(octyl)silane (OTES)—were separately introduced into the sol-gel reaction to enhance membrane hydrophobicity and separation performance. Results showed that cellulose membranes modified with OTES (MCMs-OTES) exhibited superior oil-water separation efficiency compared to those treated with HDTMS (MCMs-HDTMS), despite having lower water contact angles (WCAs). This finding suggests that surface wetting properties alone do not solely determine separation performance; instead, the presence and distribution of silicon nanoparticles formed during the sol-gel process play a significant role. Additionally, the impact of different CM pore sizes (2.5 μm, 5.0 μm, 20 μm, and 20–25 μm) on separation performance was investigated. Among these, MCMs-OTES with the largest pore size (20–25 μm) achieved the highest average separation flux (14088.7 L m−2 h−1) and efficiency (96.1 %). Notably, both HDTMS- and OTES-modified membranes exhibited excellent fouling resistance and long-term durability, maintaining high separation efficiencies over time. © 2025 Elsevier Ltd

The article deals with the issues of increasing the efficiency of drilling by developing and studying the process of interaction between the teeth of the drilling tool and the rock. A model of a tricone type drill bit has been developed. When drilling wells, 70-85% of the bits used are tricone bits. For an accurate comparative analysis, two variants of a tricone drill bit were studied, a serial one and a proposed one with a diameter of 215.9 mm. The interaction of the rock destroying tool with the rock during drilling is analyzed in a complex way using the ANSYS program, which operates on the basis of the finite element method. The change in the overall speed of an optimized tricone bit during interaction with the rock is considered. According to the results of the study, the parameters of the speed of penetration of the tooth into the rock were obtained, an analysis of the equivalent stress was carried out during the interaction of serial and experimental tricone bits with the rock. Graphs of changes in the equivalent stress of the rock by the penetration of the cone elements into it depending on time for both drilling tools were obtained. The results obtained in the study of the interaction of a rock destroying tool with a rock during drilling make it possible to determine the optimal parameters for placing teeth on the cone body at the design stage of tricone type drilling tools in the development of energy efficient bits. © J.B. Toshov, K.T. Sherov, M.R. Sikhimbayev, B.N. Absadykov, A. Esirkepov, 2024.

This research investigates the development and integration of fiber-optic temperature sensors (FOTS) into nanosatellite systems for enhanced temperature monitoring in space environments. Utilizing mathematical models, calibration tests, and integration strategies, the feasibility and effectiveness of deploying FOTS in nanosatellites have been demonstrated. Calibration tests conducted in simulated space environments validated the accuracy of FOTS readings within the specified temperature range of −30 ℃ to + 60 ℃. Integration strategies, guided by mathematical models, facilitated seamless incorporation of FOTS into a 3U nanosatellite platform, addressing challenges related to space constraints and power consumption. Implementation of low-power data acquisition systems further optimized energy efficiency while ensuring continuous operation of FOTS. The research findings underscore the importance of FOTS in enhancing temperature monitoring capabilities in nanosatellite missions, contributing to improved reliability, performance, and longevity of space systems. Prospects for further research include enhancing sensor performance, exploring multi-sensor integration, validating space qualification, adapting to diverse mission requirements, and integrating with autonomous systems. Overall, this research advances the field of space sensor technology, paving the way for more robust and capable nanosatellite systems in future space exploration endeavors. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.

Accurate and up-to-date morphometric data on lakes are crucial for hydrological modeling, ecosystem monitoring, and sustainable water resource management. This study presents the first centimeter-scale, high-resolution bathymetric model of Lake Markakol (eastern Kazakhstan), generated using advanced hydroacoustic and geospatial techniques. The primary objective was to reassess key morphometric parameters—surface area, depth, volume, and shoreline configuration—more than six decades after the only existing survey from 1962. High-density depth data were acquired with a Lowrance HDS-12 Live echo sounder, achieving vertical precision of ±0.17 m, and processed using ReefMaster and ArcGIS to produce a three-dimensional, hydrologically correct model of the lake basin. Compared with archival data, results show that while the surface area (455.365 ± 0.005 km2), length (38.304 ± 0.002 km), and width (19.138 ± 0.002 km) have remained stable, the maximum depth is lower (24.14 ± 0.17 m vs. 27 m), and the total water volume is slightly higher (6.667 ± 0.025 km3 vs. 6.37 km3). These differences highlight both the limitations of historical lead-line surveys and the enhanced accuracy of modern hydroacoustic and GIS-based methods. The workflow developed here is transferable to other remote alpine lakes, providing an invaluable baseline for limnological research, ecological assessment, hydrodynamic modeling, and long-term water resource management strategies in data-scarce mountain regions. © 2025 by the authors.

In this review article, the state of the art of the complete processing chain in the production of solar photo-electric modules from raw materials (quartzites, quartz sand) is detailed. In particular, the silicon and silane production technologies of the Institute of Physics and Technology of Almaty, Kazakhstan, can become part of an expansive technologies chain. Such integration could present a number of benefits in comparison with the analogs, including less environmental pressure and increased safety. The combination of innovative production technologies of highly effective solar cells and modules with competitive production technologies of solar-grade silicon and silane constitutes a basis for the creation of an industrial cluster in the field of silicon solar photo energy with a complete vertically integrated production cycle. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.

Purpose. The solution to one of the important problems of the underground mining method is to substantiate cost-effective, technologically feasible and safe variants for mining steeply dipping low-thickness ore bodies. Methods. Mining systems are substantiated on the basis of a detailed analysis of the developed and existing experiential variants for mining steeply dipping ore bodies, identifying production and economic disadvantages, as well as their causes. Findings. As a result of the research, the pillar raise performance in the mining system with ore shrinkage has been sub-stantiated. The main parameters of the proposed variants for mining systems with ore shrinkage, intended for expansion-type supports and borehole breaking, have been substantiated. A design has been developed of fastening the material-running raises (MRR) and ventilating raises (VR) on the working and ventilation horizons to ensure their performance in the mining system with ore shrinkage. Originality. For the first time, dependences of dilution and labour productivity on the ore body thickness and the type of ore breaking for blast-hole stoping and borehole breaking for a single and “twinned block” have been obtained. In addition, a certain dependence of the loading and delivery performance on the average fractional composition, as well as on the delivery distance, has been obtained. Practical implications. The research is characterized by scientific innovations created for the first time, which are able to ensure the efficiency and safety of mining operations, while creating the ability to manage the loss of minerals and dilution in the block, as well as reaching their calculated optimal ratio in order to achieve the most cost-effective production rate. © 2022. K. Rysbekov et al.