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        <title>Green Sciences Feed</title>
        <link>https://sciendo.com/journal/PJCT</link>
        <description>Sciendo RSS Feed for Green Sciences</description>
        <lastBuildDate>Sat, 04 Apr 2026 07:55:12 GMT</lastBuildDate>
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            <title>Green Sciences Feed</title>
            <url>https://sciendo-parsed.s3.eu-central-1.amazonaws.com/64727643215d2f6c89dc8f48/cover-image.jpg</url>
            <link>https://sciendo.com/journal/PJCT</link>
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        <copyright>All rights reserved 2026, West Pomeranian University of Technology, Szczecin</copyright>
        <item>
            <title><![CDATA[Molecular Dynamics Investigation of Interfacial Interactions and Wettability in Coal–SiO2–Water Three-Phase Systems]]></title>
            <link>https://sciendo.com/article/10.2478/pjct-2025-0020</link>
            <guid>https://sciendo.com/article/10.2478/pjct-2025-0020</guid>
            <pubDate>Wed, 31 Dec 2025 00:00:00 GMT</pubDate>
            <description><![CDATA[

Molecular dynamics simulations were conducted to examine how methylated and hydroxylated coal molecules interact with SiO2 surfaces bearing corresponding functional groups. Coal adsorption and wetting strongly depended on both coal functional groups and substrate chemistry. Methylated coal (coalCH3) formed dense, planar clusters on hydrophobic SiO2–CH3, achieving nearly complete surface coverage (contact angles: 58.5°–67.7° at the surface; 81.9o–94.4° at the tetrahedral bottom), whereas on hydrophilic SiO2–OH it formed sparse spherical or rod-like aggregates (surface: 88.4°–130.6°; bottom: 64.4°–114.4°), indicating poor wettability. Hydroxylated coal (coalOH) exhibited chain-like clusters on SiO2–CH3 evolving into continuous adsorption layers, while on SiO2–OH it formed interconnected strip-like structures with limited spreading (surface: 62.7°–113.2°; bottom: 69.9°–71°). The energy decomposition results indicated that the interaction in coalCH3 systems is primarily governed by van der Waals forces, whereas electrostatic contributions play a dominant role in stabilizing coalOH structures, highlighting the influence of surface functionalization on adsorption and wetting behaviors.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[Effect of Poly (2-hydroxyethyl methacrylate) on the Release of Phenylacetaldehyde from Chitosan Matrix]]></title>
            <link>https://sciendo.com/article/10.2478/pjct-2025-0019</link>
            <guid>https://sciendo.com/article/10.2478/pjct-2025-0019</guid>
            <pubDate>Wed, 31 Dec 2025 00:00:00 GMT</pubDate>
            <description><![CDATA[

To investigate the effect of Poly (2-hydroxyethyl methacrylate) on the extended release of Phenylacetalde-hyde, considered as a prototype of drug with aldehyde function, tow series of chitosan (CS) based systems were prepared; graft compolymers Chitosan-Phenylacetaldehyde–graft-poly(2-hydroxyethylmethacrylate) [CSPhAcAl-graft-PHEMA] with various PhAcAL ratios, and blends consisting of Chitosan-phenylacetaldehyde/Poly(2-hydroxyethylmethacrylate) [CSPhAcAl/PHEMA] with different PHEMA. PhAcAl was covalently attached to chitosan CS via Schiff base reaction assisted by pervaporation. FTIR and 1HNMR analyses confirmed chitosan Schiff base formation and its graft copolymerization with PHEMA, while distribution of PhAcAl within the copolymer matrix was examined using XRD and DSC analysis. Both systems exhibited pH-responsive swelling, however, significant differences were observed in their release behavior. CSPhAcAl/PHEMA systems with 3.74 and 8.98 wt% of PhAcAl content demonstrated the highest performance at pH 7. The release kinetics of the grafted systems followed the Korsmeyer-Peppas and Higuchi models, suggesting a Fickian diffusion-controlled mechanism. In contrast, blended systems demonstrated mixed behavior.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[Synthesis of Ag/ZIF-67 nanocomposite and its catalytic activity for the reduction of various nitrobenzaldehyde isomers]]></title>
            <link>https://sciendo.com/article/10.2478/pjct-2025-0021</link>
            <guid>https://sciendo.com/article/10.2478/pjct-2025-0021</guid>
            <pubDate>Wed, 31 Dec 2025 00:00:00 GMT</pubDate>
            <description><![CDATA[

The Ag/ZIF-67 nanocomposite was prepared by the reaction of cobalt nitrate hexahydrate (Co(NO3)2 · 6H2O) with 2-methylimidazole and silver nitrate (AgNO3). The morphology and structure of Ag/ZIF-67 nanocomposite were investigated by scanning electron microscopy (SEM), powder X-ray diffraction (XRD), Ultraviolet-visible (UV-vis) spectroscopy, Fourier transform infrared (FT-IR) spectroscopy, and Raman spectroscopy, which indicated that Ag/ZIF-67 composite was successfully synthesized with a rhombic dodecahedron structure. The catalytic activity of the hybrid nanocomposite (Ag/ZIF-67) was investigated toward the reduction of the nitro compounds (2-, 3-, and 4- nitrobenzaldehyde) to their corresponding amino compounds (2-, 3, and 4-aminobenzyl alcohol) in the presence of sodium borohydride (NaBH4) as a reducing agent. The rate for catalytic reduction of nitrobenzaldehyde isomers using Ag/ZIF-67 nanocomposite was in the order: 4-> 2- > 3- nitrobenzaldehyde. The kinetics study showed that the reduction of nitrobenzaldehyde isomers was followed by a pseudo-first-order reaction rate law.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[Advances in intrinsically self-healing solid polymer electrolytes for lithiumion batteries. Review article.]]></title>
            <link>https://sciendo.com/article/10.2478/pjct-2025-0017</link>
            <guid>https://sciendo.com/article/10.2478/pjct-2025-0017</guid>
            <pubDate>Wed, 31 Dec 2025 00:00:00 GMT</pubDate>
            <description><![CDATA[

The demand for high safety and long cycle life of lithium-ion batteries has driven in-depth research on solid polymer electrolytes (SPEs), but the problem of mechanical damage has severely limited their practical applications. Intrinsic self-healing SPEs provide innovative solutions for healing micro cracks and inhibiting dendrite growth, enabling dynamic network reconfiguration capabilities. In this paper, we systematically review the design strategies and research progress of self-healing SPEs: SPEs based on supramolecular interactions (e.g., quadruple hydrogen bonds achieving >95% healing efficiency within 1–60 min at room temperature); SPEs based on dynamic covalent bonds (e.g., imine bonds enabling ionic conductivities up to 7.48 × 10–4 S cm–1); and synergistic design strategies combining dynamic covalent bonds with supra-molecular interactions. Critical limitations persist, including low intrinsic ionic conductivity (10–4 S cm–1 without plasticizers) impeding fast charging, unresolved trade-offs between mechanical strength (>10 MPa) and healing efficiency (>95%), along with unverified scalable manufacturing and long-term stability under extreme conditions such as high voltage or bending. Future research should prioritize cross-scale co-design of dynamic networks, develop intelligent sensing and adaptive healing systems, and advance engineering manufacturing processes. These developments will facilitate the transformation of self-healing SPEs from fundamental research to practical high-safety, long-lifespan energy storage devices.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[Electrocoagulation and Coupled Processes for Urea Wastewater Removal: Parametric study and gradient boosting optimization.]]></title>
            <link>https://sciendo.com/article/10.2478/pjct-2025-0018</link>
            <guid>https://sciendo.com/article/10.2478/pjct-2025-0018</guid>
            <pubDate>Wed, 31 Dec 2025 00:00:00 GMT</pubDate>
            <description><![CDATA[

This study investigates urea removal from wastewater using zinc-based electrocoagulation method, supported by Gradient Boosting Regressor modeling. The highest urea removal of 42% was obtained for 1.2 g/L initial urea concentration, 22 mA/cm2 current density, and a pH solution of 10, while natural pH (≈7.50) gave 30%. By applying the optimum conditions 27% of urea was removed from real hospital effluent. Application of GBR model leveraging Artificial Intelligence (AI) demonstrated a high predictive accuracy (R2 = 0.9825, RMSE = 0.01666) with experimental results. Treatment combination processes were investigated: Chemical Coagulation–Electrocoagulation achieved 35% efficiency, while two EC cycles yielded 45%. Electrocoagulated sludge characterization by scanning electron microscope/energy-dispersive X-ray spectroscopy, Fourier-transform infrared spectroscopy, X-ray diffraction analysis revealed surface irregularities as well as the presence of zinc, carbon, nitrogen, and sodium. These findings confirm the treatment’s effectiveness in removing urea and support the safe valorization and reuse of the sludge. EC proves effective and cost-efficient for industrial-scale implementation.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[Study on the Formation of Calcium Carbonate by Carbon Sequestration of Phosphogypsum]]></title>
            <link>https://sciendo.com/article/10.2478/pjct-2025-0016</link>
            <guid>https://sciendo.com/article/10.2478/pjct-2025-0016</guid>
            <pubDate>Tue, 07 Oct 2025 00:00:00 GMT</pubDate>
            <description><![CDATA[

Currently, the utilization and treatment of solid waste resources and the recycling of greenhouse gas CO2 need to be urgently addressed. Calcium carbonate powder was prepared by extracting Ca2+ from phosphogypsum, a by-product of wet-process phosphoric acid, with ammonium acetate solution and fixing CO2 with leaching solution. The effects of ammonium acetate concentration, liquid-solid mass ratio, reaction temperature, and reaction time on the leaching rate of Ca2+, and the effects of ammonia addition, CO2 concentration, and carbonization time on the conversion rate of Ca2+ were systematically studied. SEM, XRD, and particle size analysis were used to analyze the morphological characteristics and formation mechanism of carbonized products under different ammonia additions and carbonization times. The results show that under the optimal conditions, the leaching rate of Ca2+ can reach 97.9%, the conversion rate of calcium carbonate can reach 91.78%, and the D50 of calcium carbonate powder is 14.7 μm.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[Bridge crack self-repairing based on nanosilica-modified bacterial solution]]></title>
            <link>https://sciendo.com/article/10.2478/pjct-2025-0014</link>
            <guid>https://sciendo.com/article/10.2478/pjct-2025-0014</guid>
            <pubDate>Tue, 07 Oct 2025 00:00:00 GMT</pubDate>
            <description><![CDATA[

To address the challenge of self-healing concrete cracks (CCs) in bridge structures, a nano-SiO2-modified bacterial solution was developed and systematically evaluated for its effectiveness in enhancing crack healing performance. Calcium lactate, used as a calcium source, increased the surface roughness of calcium carbonate crystals, enhancing Ca2+ adsorption and achieving a mineralization efficiency (ME) of 2.18 mol/h at 36 h. The optimized application process—three treatments at 15-minute intervals—significantly reduced the concrete’s chloride migration coefficient (8.48 × 10-13 m2/s), electrical flux (327 C), and carbonation depth (2.8 mm after 13 days). After 28 days, the bacterial group repaired over 95% of both primary and secondary crack areas. These improvements are attributed to nano-SiO2 providing a high specific surface area for microbial adhesion and promoting calcium carbonate precipitation, thus accelerating crack closure. The proposed nano-SiO2-modified bacterial solution offers a sustainable and efficient approach to enhancing the durability and protective performance of concrete in bridge applications.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[Fluorescent Polysaccharide-Silica-Based Drug Conjugate Nanocarrier Inhibit Non-small Cell Lung Cancer Proliferation]]></title>
            <link>https://sciendo.com/article/10.2478/pjct-2025-0012</link>
            <guid>https://sciendo.com/article/10.2478/pjct-2025-0012</guid>
            <pubDate>Tue, 07 Oct 2025 00:00:00 GMT</pubDate>
            <description><![CDATA[

Non-small cell lung cancer (NSCLC) is a highly prevalent and aggressive type of lung cancer, often associated with a poor prognosis. Cucurbitacin B, a natural tetracyclic triterpene, has demonstrated remarkable anticancer activity. In this study, we engineered a novel drug delivery system, Dex-APDMS@CP1@1@ Cucurbitacin B, which incorporates synthetically derived compound 1 to enhance the therapeutic efficacy of Cucurbitacin B. The system was comprehensively characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and nitrogen adsorption techniques. Results revealed excellent stability, a uniform particle size of approximately 500 nm, and a high drug-loading efficiency of 35.2 ± 2.1 wt%. Additionally, the in vitro drug release study indicated that 88.6 ± 3.5% of Cucurbitacin B was released within 12 hours, demonstrating a rapid release profile. The successful encapsulation of the drug was further confirmed by effective fluorescence quenching. In vitro experiments showed that the Dex-APDMS@CP1@1@Cucurbitacin B system significantly inhibited the proliferation of NSCLC cells, highlighting its great potential for targeted cancer therapy.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[Trends and mechanisms in agricultural mulch film microplastic pollution: a critical review. Review article.]]></title>
            <link>https://sciendo.com/article/10.2478/pjct-2025-0015</link>
            <guid>https://sciendo.com/article/10.2478/pjct-2025-0015</guid>
            <pubDate>Tue, 07 Oct 2025 00:00:00 GMT</pubDate>
            <description><![CDATA[

This study systematically reviews the formation, migration, and effects of mulch film-derived microplastics on soil ecosystems, as well as the combined effects of microplastics and pesticides. This review highlights that mulch film microplastics affect plant growth by altering soil properties, nitrogen metabolism, and photosynthesis. Additionally, microplastics have negative effects on animal growth, behavior, reproduction, and tissue integrity, with potential health risks to humans through food chain contamination. The migration of microplastics in soil is influenced by biotic and abiotic processes, that common soil organisms accelerate the dispersal of microplastics through bioturbation. The interaction between microplastics and pesticides was evaluated, revealing potential risks of enhanced soil pollution through changes in pesticide adsorption, degradation, and transport. Future research should prioritize the development of biodegradable mulch films, improvements in microplastic degradation technologies, and investigations into the environmental behavior of microplastics in soil to mitigate their ecological impacts and support sustainable agricultural practices.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[From Waste to Resource: Upcycling PET into High-Performance MOFs for Advanced Applications]]></title>
            <link>https://sciendo.com/article/10.2478/pjct-2025-0013</link>
            <guid>https://sciendo.com/article/10.2478/pjct-2025-0013</guid>
            <pubDate>Tue, 07 Oct 2025 00:00:00 GMT</pubDate>
            <description><![CDATA[

Due to the non-degradable nature of polyethylene terephthalate (PET) and the widespread use in food packaging, clothing, and other fields of PET, discarded PET waste continues to accumulate globally, posing significant risks to both the environment and human health. Through chemical recycling methods, PET waste can be decomposed into terephthalic acid (TPA), which serves as an organic linker of metal-organic frameworks (MOFs) and demonstrates potential for achieving PET waste upcycling, thus garnering considerable attention. MOFs prepared from PET waste have been extensively applied in fields such as adsorption, catalysis, and energy storage. This review aims to analyze the latest research advancements concerning the MOFs prepared from PET waste to provide insights for further development in both the preparation and application of MOFs prepared from PET waste. The comprehensive analysis of this review highlights the innovative pathways toward addressing environmental challenges while enhancing the utility of recycled resources.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[Study on photocatalytic degradation and antibacterial properties of TiO2/CS composite]]></title>
            <link>https://sciendo.com/article/10.2478/pjct-2025-0011</link>
            <guid>https://sciendo.com/article/10.2478/pjct-2025-0011</guid>
            <pubDate>Thu, 17 Jul 2025 00:00:00 GMT</pubDate>
            <description><![CDATA[

Capparis spinosa (CS) was extracted by the soxhlet extraction method using ethanol as the extractant. The TiO2/CS composite was synthesized by the in situ solvothermal method with CS extract as a dopant. The morphology, crystal structure, and optical properties of TiO2/CS were characterized by SEM, TEM, XRD, UV-Vis and FT-IR spectroscopy. The experimental results showed that TiO2/CS exhibited excellent photoresponse performance, generated active free radicals, and achieved photocatalytic degradation of organic pollutants. Furthermore, TiO2/CS served as antibacterial agents to evaluate their antibacterial properties against Escherichia coli (E. coli) at different concentrations. The results showed that TiO2/CS possessed excellent antibacterial performance and produced a significant antibacterial ring, with antibacterial rate of about 100% after being diluted 100 and 500 times, respectively. The test results indicated that TiO2/CS has great application potential in the field of antibacterial activity and photocatalytic degradation, owing to its advantages of being natural, environmentally friendly, and economical.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[Development and properties of cementitious self-healing materials based on composite complexing agents]]></title>
            <link>https://sciendo.com/article/10.2478/pjct-2025-0009</link>
            <guid>https://sciendo.com/article/10.2478/pjct-2025-0009</guid>
            <pubDate>Thu, 17 Jul 2025 00:00:00 GMT</pubDate>
            <description><![CDATA[

In addressing the concerns regarding structural performance degradation and diminished service life resulting from concrete crack formation during utilization, this study has developed a cement-based self-healing material. This material utilizes a composite complexing agent composed of tartaric acid derivatives, sodium hexametaphosphate, ethylenediaminetetraacetic acid tetrasodium salt, and vinyl acetate-ethylene redispersible latex powder. The material composition was optimized, and its self-healing performance and mechanism were systematically studied. The findings indicated that when the composite complexing agent content was set at 6% by mass of cement, there was a substantial decrease in the porosity, from 34.2% to 14.2%. In comparison with the control group, specimens with a 6% composite complexing agent exhibited an 8.3 MPa increase in compressive strength and a substantial enhancement in crack sealing, with a rate increase from 73.1% to 99.7%, following 28 days of water curing.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[Research progress of emerging flame retardants for epoxy resin]]></title>
            <link>https://sciendo.com/article/10.2478/pjct-2025-0010</link>
            <guid>https://sciendo.com/article/10.2478/pjct-2025-0010</guid>
            <pubDate>Thu, 17 Jul 2025 00:00:00 GMT</pubDate>
            <description><![CDATA[

Epoxy resin (EP) has been widely used in many fields due to its excellent physical and chemical properties. However, its inherent flammability limits its application in some fields, and the development of efficient and environmentally friendly new flame retardants has become a research hotspot. In recent years, researchers have been committed to developing new flame retardants to improve the flame retardant properties of EP. The development of synergistic flame retardant systems, combined with the advantages of various flame retardants, has become a research trend. In this paper, the application progress of three kinds of new flame retardants in EP, including nano-materials, organic materials, and inorganic materials, is summarized. Their synthesis methods, structural design, and application prospects are compared, and a summary and prospect are given.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[Investigation of Waste Cooking Oil processing using HAAS automated reactors system]]></title>
            <link>https://sciendo.com/article/10.2478/pjct-2025-0007</link>
            <guid>https://sciendo.com/article/10.2478/pjct-2025-0007</guid>
            <pubDate>Thu, 17 Jul 2025 00:00:00 GMT</pubDate>
            <description><![CDATA[

The processing of waste cooking oils (WCO) is a complex process that heavily depends on their chemical and physical properties. The work described in this article includes research on the processing of WCO samples using transesterification methods. An automated reactor system Matrix9 HAAS was used to perform process studies and FT-IR measurements.
Transesterification of oils in the presence of KOH might be directly applied as the optimal one for oils with a low acid number, while for oils with a higher acid number an additional esterification step is advisable in the presence of an acid catalyst or under conditions of high temperature and pressure.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[Preparation and characterization of polymer gel microspheres assembled layer by layer for profile control and water shutoff]]></title>
            <link>https://sciendo.com/article/10.2478/pjct-2025-0008</link>
            <guid>https://sciendo.com/article/10.2478/pjct-2025-0008</guid>
            <pubDate>Thu, 17 Jul 2025 00:00:00 GMT</pubDate>
            <description><![CDATA[

A new temporary plugging agent was developed to solve the problem of insufficient plugging performance of existing gel profile control and water shutoff. The organic material with temperature sensitivity and phase change function is assembled on the surface of the matrix material with high stability and good plugging performance by multi-layer assembly technology, and the composite gel profile control agent with multi-level structure is prepared. Research shows that the prepared profile control agent has a certain salt tolerance, and the inhibitory effect of CaCl2 is greater than that of NaCl. When the C25H52 content is 3.6%, the multi-layer assembled profile control agent prepared by it has the best water absorption performance. When the temperature is 60 oC, the multi-layer assembled paraffin profile control agent prepared has the best water absorption effect.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[The use of artificial neural networks for the assessment of the operation of settling tanks]]></title>
            <link>https://sciendo.com/article/10.2478/pjct-2025-0001</link>
            <guid>https://sciendo.com/article/10.2478/pjct-2025-0001</guid>
            <pubDate>Thu, 10 Apr 2025 00:00:00 GMT</pubDate>
            <description><![CDATA[

The aim of the research was to develop and evaluate the usefulness of artificial neural network models for predicting the key operating parameters of centrifugal settlers. Various settler structures were analyzed, taking into account such elements as internal partitions and also inlet and outlet nozzles. Neural network modeling was continued until the highest possible quality was achieved in terms of training, testing and validation, with the occurrence of errors also being minimized. This process involved multiple iterations and adjustments of the network’s parameters to achieve optimal results. It was shown that artificial neural networks are characterized by having high accuracy in predicting the efficiency and damming values of centrifungal sedimentation tanks with regards to their design and hydraulic load. The designed network is able to determine both efficiency and liquid level with satisfactory accuracy.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[Investigation of catalytic pyrolysis of Erzurum-Umutbaca coal by using the thermal analysis method]]></title>
            <link>https://sciendo.com/article/10.2478/pjct-2025-0004</link>
            <guid>https://sciendo.com/article/10.2478/pjct-2025-0004</guid>
            <pubDate>Thu, 10 Apr 2025 00:00:00 GMT</pubDate>
            <description><![CDATA[

In the study, the catalytic pyrolysis behavior of low-rank Umutbaca coal with the addition of CaO was examined using thermal analysis methods. For this purpose, the effect of adding CaO to coal on both the pyrolysis temperatures of the coal and the composition of the gas and solid product (char) was investigated. Also, the kinetic analysis was carried out to characterize the catalytic pyrolysis process by adding CaO to coal. Using the data obtained in TGA at heating rates of 2.5, 5, and 10 °C/min, the activation energies required for the pyrolysis process of coal both with and without CaO were calculated by KAS and FWO methods. Thermodynamic parameters including ∆H, ∆G, and ∆S were calculated with activation energies obtained from the FWO method. The thermodynamic suitability of adding CaO to a low rank coal such as Umutbaca for the pyrolysis process was investigated.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[Study on the Extraction Mechanism and the Phase Equilibrium of Fluorosilicic Acid with Trioctylamine]]></title>
            <link>https://sciendo.com/article/10.2478/pjct-2025-0002</link>
            <guid>https://sciendo.com/article/10.2478/pjct-2025-0002</guid>
            <pubDate>Thu, 10 Apr 2025 00:00:00 GMT</pubDate>
            <description><![CDATA[

Solvent extraction technology was applied to extract fluorosilicic acid from aqueous solution with trioctylamine (TOA) as extractant. The extraction mechanism of fluorosilicic acid with TOA was studied via stoichiometry methods combined with spectroscopic methods. The results of saturation capacity method and equimolar methods showed that there were two kinds of organic extracts produced with molar ratio of 1: 1 and 2: 1 in the system, whose chemical formulas were (R3N · H2SiF6)3 and [(R3N)2 · H2SiF6]2, respectively. Fuorosilicic acid was extracted with TOA via hydrogen bonds. The liquid-liquid phase equilibria of the ternary system fluorosilicic acid (1)-water (2)-TOA (3) from 283.15 K to 323.15 K were determined. The equilibrium phase diagram of the ternary system is obtained. The partition coefficient and separation factor were calculated to evaluate the extraction capacity of TOA for fluorosilicic acid, which showed that TOA exhibited high selectivity.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[Development and characterization of self-healing gel temporary plugging agent for well killing]]></title>
            <link>https://sciendo.com/article/10.2478/pjct-2025-0003</link>
            <guid>https://sciendo.com/article/10.2478/pjct-2025-0003</guid>
            <pubDate>Thu, 10 Apr 2025 00:00:00 GMT</pubDate>
            <description><![CDATA[

A new type of self-healing gel was developed by using acrylamide (AM) and other materials, and the effects of the content of PEGDA200 and PEGDA400 on the mechanical properties of gel were compared. The results showed that adding PEGDA200 and PEGDA400 to the self-repairing gel significantly improved the performance of the composite gel. When the content of PEGDA200 in the gel was 0.2%, the rheological property after repair was 109.4% of that before repair, the compressive property after repair was 95.2% of that before repair, the adhesive property was increased by 36.8%, and the compressive strength after repair was 92.4% of that before repair. When the content of PEGDA400 in gel was 0.2%, the rheological property of gel after repair was 105.8% of that before repair, the maximum adhesion could be increased by 17.8%.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[Pickering emulsions stabilized by modified Thanaka powder: emulsifying capability and stability]]></title>
            <link>https://sciendo.com/article/10.2478/pjct-2025-0006</link>
            <guid>https://sciendo.com/article/10.2478/pjct-2025-0006</guid>
            <pubDate>Thu, 10 Apr 2025 00:00:00 GMT</pubDate>
            <description><![CDATA[

Thanaka powder is a natural and safe biomass material that can be used in the preparation of Pickering emulsions. It contains lots of hydrophilic phenolic hydroxyl groups, making it highly hydrophilic and leading to emulsion instability, which further limits its application in the cosmetics industry. In this paper, Thanaka powder was modified to improve its stability. The modified Thanaka powder was characterized and was used to prepare Pickering emulsions. The results showed that the stability of the Pickering emulsion increased with the increase of the solid particle concentration; the suitable oil-water ratio helped to obtain the Pickering emulsion with good stability; the different aqueous phase environments had little effect on the particle size variation of the emulsified particles; the emulsions exhibited shear thinning behavior. This study offers valuable insights into the research, development, and commercialization of Thanaka-based skincare products, thereby expanding the applications of Thanaka powder.
]]></description>
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