Chemical Papers最新文献

{"title":"Facile synthesis of charcoal-loaded NiO–CuO–ZnO ternary metal oxide photocatalyst and H2O2-assisted degradation of chlorpyrifos","authors":"Nadeem Raza,&nbsp;Abdullah Jan,&nbsp;Mostafa E. Salem,&nbsp;Anis Ahmad Chaudhary,&nbsp;Fawad Ahmad","doi":"10.1007/s11696-025-04210-5","DOIUrl":"10.1007/s11696-025-04210-5","url":null,"abstract":"<div><p>The widespread manufacturing, use, and disposal of pesticides around the globe raise concerns about both human and animal health because of their bioaccumulating and biopersistent properties. A growing technology for the elimination of pesticides in aqueous media, metal oxide-based photocatalysis has attracted the attention of numerous researchers in recent years because of its viability, cost-effectiveness, and faster rate of degradation. In order to increase the efficiency of degradation, metal oxide-based photocatalytic degradation has been researched with various modifications, such as binary, ternary, or metal/non-metal-doped metal oxide photocatalysts. Chlorpyrifos degradation in aqueous medium by ternary metal oxide (NiO–CuO–ZnO) photocatalyst under UV and sunlight irradiations was investigated in this research. The influence of reaction parameters such as reaction time, pH, influence of oxidizing specie (H₂O₂), initial chlorpyrifos concentration, and UV/sunlight irradiation on chlorpyrifos degradation was studied. Improved degradation percentage was showed by charcoal-loaded NiO–CuO–ZnO photocatalyst after 45-min reaction time. UV–visible spectrophotometer was used to analyze the degradation of chlorpyrifos. To maintain the environment’s safety, more research is necessary to achieve rapid and maximal deterioration.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 10","pages":"6645 - 6654"},"PeriodicalIF":2.5,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145242792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analyzing nonlinear patterns between entropy and graph indices through regression models in Anoctamin Network","authors":"Muhammad Farhan Hanif,&nbsp;Muhammad Talha Farooq,&nbsp;Ali Haidar,&nbsp;Ebraheem Alzahrani","doi":"10.1007/s11696-025-04222-1","DOIUrl":"10.1007/s11696-025-04222-1","url":null,"abstract":"<div><p>This article gives an extensive regression-based characterization of degree-dependent topological indices and entropy quantification for the Anoctamin II (AnO2) network, a calcium-activated chloride channel plays a crucial role in neural signaling and perception processes. Utilizing logarithmic and quadratic regression approaches, we quantitatively investigate correspondence between structural graph indices and respective entropy descriptors. Our findings consistently show that logarithmic regression is superior to quadratic in describing the network structure-dependent nonlinear relationships contained in the molecular graph. From statistical modeling and data visualization, we uncover unique growth patterns among different indices including Randic, Zagreb, and Augmented Zagreb with respective entropy quantification. These findings hold significant implications for quantifying molecular complexity and modeling predictive bio-structure behavior in network-based pharmaceutical design, materials science, and computational biology applications.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 10","pages":"6779 - 6794"},"PeriodicalIF":2.5,"publicationDate":"2025-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145242664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization of cholesterol reduction by Lactobacillus plantarum through central composite design for hypercholesterolemia","authors":"Saima Shahzad Mirza,&nbsp; Sanaullah,&nbsp;Sibtain Ahmed,&nbsp;Azfareen Shahzad Mughal,&nbsp;Khayala Mammadova,&nbsp;Muhammad Ashraf,&nbsp;Muhammad Arshad,&nbsp;Dalal Hussien M. Alkhalifah,&nbsp;Wael N. Hozzein,&nbsp;Mohamed Mohany","doi":"10.1007/s11696-025-04211-4","DOIUrl":"10.1007/s11696-025-04211-4","url":null,"abstract":"<div><p>Probiotics derived from milk and milk products have cholesterol reduction potential. The main objective of this study was to evaluate the cholesterol reduction ability of lactic acid bacterial species isolated from dairy milk and milk products. Two bacterial species were isolated, characterized, and their cholesterol reduction potential was evaluated. Maximum cholesterol reduction levels were about 15.3 and 13.91% observed on the 4th day of incubation by bio-therapeutic bacterial strains <i>Lactobacillus plantarum</i> and <i>Lactobacillus acidophilus</i>, respectively. The cholesterol reduction potential of a former bio-therapeutic bacterial strain with maximum cholesterol reduction potential was further optimized by using a central composite design of response surface methodology under the same experimental conditions. Maximized cholesterol reduction of 21.91% was achieved after optimization. This increase of 43% in cholesterol reduction was achieved while optimizing three factors, including bacterial inoculum (log CFU/mL)/inoculum size, substrate concentration (mg/mL), and incubation time (days) by using central composite design and response surface methodology. From the results obtained, it has been suggested that optimization of parameters by applying response surface methodology showed more significant results (<i>P</i> &lt; 0.05) in a short time with a smaller number of experiments, instead of the conventional and established “one factor at a time” approach.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 10","pages":"6655 - 6665"},"PeriodicalIF":2.5,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145242679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Wound healing activity of an Emulgel formulation containing essential oils isolated from Withania Somnifera","authors":"Kalim Ullah Khan,&nbsp;Abu Bakar Munir,&nbsp;Muhammad Razi Ullah Khan,&nbsp;Waqar Siddique,&nbsp;Aqeela Iqbal,&nbsp; Tassawer-e-Meran,&nbsp;Qurat-ul-ain Shoaib","doi":"10.1007/s11696-025-04212-3","DOIUrl":"10.1007/s11696-025-04212-3","url":null,"abstract":"<div><p>This research examined the wound healing properties of an emulgel formulation that includes, essential oils from <i>Withania somnifera</i> (Ashwagandha). The emulgel was formulated by incorporating an oil-in-water (O/W) emulsion with a base (gel), displaying stability at room temperature, while representing phase separation, pH variations, and enlarged globule size when exposed to higher temperatures. The formulation showed encouraging wound healing characteristics in an excision wound model, with notable wound contraction observed over 20 days (for instance, 83 mm² for the control group compared to 54 mm² for the Ashwagandha emulgel group, <i>p</i> &lt; 0.05). Furthermore, the emulgel indicated an In vitro Sun Protection Factor of 12.11, suggesting its potential advantages for both skin protection and repair. Although the findings underline the therapeutic potential of Ashwagandha emulgel in wound healing. </p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 10","pages":"6667 - 6679"},"PeriodicalIF":2.5,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145242842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization of an inertial-based electroosmotic micromixer","authors":"Ziyi Zhao,&nbsp;Yu Li","doi":"10.1007/s11696-025-04223-0","DOIUrl":"10.1007/s11696-025-04223-0","url":null,"abstract":"<div><p>This paper presents a novel inertial-based electroosmotic micromixer designed for high-throughput applications in chemical and biological industries. The device features a curved microchannel that generates lateral Dean vortices, combined with a dedicated section where an electroosmotic field is applied using two pairs of electrodes. Both two- and three-dimensional simulations are conducted using the finite element-based COMSOL Multiphysics software. The results reveal that the mixing index (MI) increases with the applied DC voltage, while the effect of inlet velocity (U_in) follows a decreasing-then-increasing trend. Specifically, MI improves from around 50% to nearly 99% when the voltage is varied between 0 and 50 V, when U_in = 0.005 m/s. Additionally, the Figure-of-Merit (FoM) values obtained under the DC electric field are notably high, especially at low inflow velocities; for example, when U_in = 0.001 m/s, the FoM reaches approximately 5 with active electroosmotic forces. When an AC electric field is applied, the MI improves with increasing voltage, but optimal values for both inlet velocity and frequency emerge. For instance, the MI reaches 96.037%, 97.527%, 97.666%, 87.488%, and 81.624% at frequencies of 4, 8, 16, 32, and 64 Hz, respectively, highlighting the importance of tuning these parameters for maximum MI. This study demonstrates the potential of combining inertial and electroosmotic effects to achieve enhanced mixing performance in microfluidic devices.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 10","pages":"6795 - 6807"},"PeriodicalIF":2.5,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145242675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microwave-assisted synthesis of Sterculia gum- graft-poly(acrylamide-co-vinyl acetate) hydrogel for remarkable removal of crystal violet from aqueous solution","authors":"Sinderpal Kabalsingh Tank,&nbsp;Barjinder Kaur,&nbsp;Navpreet Kaur","doi":"10.1007/s11696-025-04203-4","DOIUrl":"10.1007/s11696-025-04203-4","url":null,"abstract":"<div><p>This study aimed to synthesize novel Sterculia gum-graft-poly(acrylamide-co-vinyl acetate) hydrogel abbreviated as SG-g-(PAAm-co-PVAc) hydrogel by microwave-assisted free radical reaction to remove crystal violet (CV) dye from aqueous media. The graft copolymerization reaction of acrylamide (AAm) and vinyl acetate (VAc) onto sterculia gum (SG) was optimized by varying the concentration of SG, monomers AAm, VAc, initiator, crosslinker and studying the effect of these conditions on the swelling ratio (g/g) and hydrogel integrity. The hydrogel was characterized by scanning electron microscopy (SEM), infrared spectroscopy (FTIR), X-ray diffraction (XRD), Brunauer–Emmett–Teller analysi (BET) and differential thermal analysis (DTA) methods to confirm synthesis. SEM demonstrated uneven heterogeneous morphology with irregular pores and craters. Inclusion of monomer units into hydrogel was confirmed by FTIR. The maximum swelling ability of fabricated hydrogel was 1263% at optimized concentrations at pH 9.2. SG-g-(PAAm-co-PVAc) hydrogel (having pH_PZC of 4.09) showed a good adsorption ability for CV dye. The maximum removal of CV dye (64.385 ± 1.044 mg/g) was achieved at temperature of 30 °C, pH 9.2 and at hydrogel dose level of 20 mg. The experimental data fit closely with pseudo-first-order and Temkin models. The enhanced CV dye adsorption was driven by electrostatic attractions, hydrogen bonding, and π–π stacking. Thermodynamically, the studied process was spontaneous and exothermic. Reusability experiments demonstrated the hydrogel's stability over five adsorption–desorption cycles. Overall, the study reveals adsorptive properties of novel SG-g-(PAAm-co-PVAc) hydrogel as a promising adsorbent for sustainable CV dye treatment from water. </p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 10","pages":"6557 - 6578"},"PeriodicalIF":2.5,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145242809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Determination of thermodynamic parameters in adsorption studies: a review","authors":"Chikmagalur Raju Girish","doi":"10.1007/s11696-025-04218-x","DOIUrl":"10.1007/s11696-025-04218-x","url":null,"abstract":"<div><p>Numerous contaminants are released into the environment by industrial effluent. The pollutants have harmful effect on the environment and are required to be treated. Adsorption using activated carbon is one of the promising methods for removing the pollutants. Thermodynamic studies in adsorption play a significant role as it determines energy requirement and feasibility of the process. The significance of thermodynamic parameters, such as activation energy, isosteric heat of adsorption, DR model constants, enthalpy, Gibbs free energy and entropy, is studied. Its significance in the adsorption, its role in deciding the type of mechanism and nature of the process are reviewed in this paper.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 9","pages":"5687 - 5706"},"PeriodicalIF":2.5,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11696-025-04218-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144918555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Solar-driven photocatalytic degradation of gallic acid using TiO₂: kinetics, optimization, and catalyst regeneration","authors":"Hanaa Khoussa,&nbsp;Abdelkader Benderrag,&nbsp;Khalil Abdelhamid Benabbou,&nbsp;Abdelghani Bouchama,&nbsp;Aicha Khenifi","doi":"10.1007/s11696-025-04233-y","DOIUrl":"10.1007/s11696-025-04233-y","url":null,"abstract":"<div><p>This study explores the photocatalytic degradation of gallic acid (GA) using TiO₂ under natural sunlight. Initial adsorption tests conducted in the absence of light determined that a 30-min pre-adsorption phase was necessary prior to initiating photocatalysis. Sunlight alone demonstrated minimal degradation of GA, but the presence of TiO₂ significantly accelerated the process, achieving a 96% degradation rate within 120 min. The optimal TiO₂ concentration was identified as 1 g/L. The influence of pH was also investigated, with gallic acid’s natural pH (4.6) yielding the highest degradation efficiency. At initial GA concentrations of 0.1 and 0.2 mM, degradation was nearly complete within 60 and 120 min, respectively, while higher concentrations adversely impacted performance. The degradation process followed pseudo-first-order kinetics, with high correlation coefficients (<i>R</i>² &gt; 0.95). A representative rate constant (k_obs) of 0.03 min⁻¹ was obtained at initial gallic acid concentration of 0.2 mM. Catalyst regeneration studies revealed that simple water washing retained 74% of catalytic efficiency after five cycles, outperforming HCl and NaOH treatments. XRD and SEM analyses confirmed the preservation of TiO₂’s structural integrity post-regeneration.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 10","pages":"6907 - 6919"},"PeriodicalIF":2.5,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145242829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Waste teak leaf litter ash as a mild solid acid-catalyzed esterification for free fatty acid reduction from WCO in biodiesel pretreatment production","authors":"Nuntapon Apichai,&nbsp;Phiphop Narakaew,&nbsp;Wipanoot Baison,&nbsp;Aphiruk Chaisena,&nbsp;Theeraporn Promanan,&nbsp;Siwat Thungprasert,&nbsp;Sopittaporn Sillapapiromsuk,&nbsp;Pakorn Santakij,&nbsp;Chainet Chanogkun,&nbsp;Kanjana Ruttanateerawichien,&nbsp;Napaporn Singbumrung,&nbsp;Phansuang Udomputtimekakul,&nbsp;Samroeng Narakaew","doi":"10.1007/s11696-025-04199-x","DOIUrl":"10.1007/s11696-025-04199-x","url":null,"abstract":"<div><p>Food waste is one of the most worrying aspects of the problems facing the global food system, and it is a major problem in the high-income countries and Thailand. Among the recyclable liquid food wastes is waste cooking oil (WCO). WCO can be recycled properly to lessen its negative environmental effects and to be utilized again in industrial processes like soap and biodiesel. Waste teak (<i>Tectona grandis</i> L.) leaf litter (WTLL) from the area of northern Thailand is considered a good and sustainable option for a mild solid acid catalyst because it is widely available. This study uses WTLL ash as a mild solid acid to help lower the free fatty acids (FFA) in WCO during the biodiesel production process. XRD, FTIR, LVSEM, EDX, and the Hammett indicator method were used to characterize the WTLL ashes. According to the XRD data, the main materials found in the ashes heated to 500 °C were SiO₂ (quartz) and Mg₀.₀₃Ca₀.₉₇CO₃, while at 700 °C, the ashes showed a less clear structure of K₂MgSi₅O₁₂ that had a small amount of K₂O. We saw the structures of SiO₂ (cristobalite), CaSiO₃ (wollastonite), and K₂MgSi₅O₁₂ when the temperature increased to 900 °C, and their functional groups and elements were confirmed using FTIR and EDX techniques. Hammett indicators verified only the WTLL ash at 500 °C that has a weak acid strength property with a total acidity of 0.7370 ± 0.0135 mmol g^–1 ash due to the ash containing high silica that can be suitable for the esterified FFA conversion of 79.50 ± 0.05% with the optimal yield of the esterified WCO that was 91.53 ± 1.49% under conditions of a 3:1 MeOH-to-WCO molar ratio, 2.5 wt.% catalytic loading, a stirred speed of 650 rpm, and the reaction temperature and time at 80 °C for 4 h; the maximum three catalytic reuse cycles were observed. Furthermore, GC–MS revealed the WCO biodiesel (WCOME) from the esterified WCO with high fatty acid methyl ester (FAME) conversion of 94.05%.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 10","pages":"6513 - 6526"},"PeriodicalIF":2.5,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145242662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Whey protein as a sustainable hydrate inhibitor for enhancing flow assurance in natural gas pipelines: implications for environmental sustainability","authors":"Ankur Singh,&nbsp;Shanker Krishna,&nbsp;Ajay Suri,&nbsp;Isaac Wilson,&nbsp;Sumeet Chakraborty","doi":"10.1007/s11696-025-04217-y","DOIUrl":"10.1007/s11696-025-04217-y","url":null,"abstract":"<div><p>To maintain the efficient operation of the oil and gas industry, ensuring the continuous and unobstructed transport of hydrocarbons through pipelines is essential, particularly in preventing flow disruptions caused by hydrate formation. Kinetic hydrate inhibitors (KHIs) have emerged as a widely studied solution due to their ability to effectively delay hydrate formation at low concentrations, typically between 0.5 and 2% of the water phase. This approach enhances both operational safety and efficiency. However, a major drawback of conventional KHIs is their non-biodegradable nature, raising environmental concerns and regulatory restrictions. Consequently, there is a pressing need to identify, develop, and rigorously evaluate sustainable and biodegradable alternatives. This investigation explores the potential of whey protein as a natural hydrate inhibitor, assessing its effectiveness in mitigating hydrate formation while addressing environmental sustainability challenges. To evaluate its effectiveness as a hydrate inhibitor, the induction time (IT, denoted as <i>t</i>_<i>i</i>) for hydrate formation was recorded under varying conditions, specifically at concentrations of 0.25, 0.5 and 1 wt.%. Experiments were conducted using methane (CH₄) gas at a pressure of 7.6 MPa, where the equilibrium temperature (<i>T</i>_eq) for hydrate formation is 10.45 °C. The cooling rate was systematically controlled at 1 °C/h below this equilibrium threshold. Findings from the study indicated that while whey protein displayed slightly reduced inhibitory efficiency in comparison with commercially available KHIs, it presents a promising biodegradable alternative to conventional, non-sustainable KHIs. This is particularly significant for offshore applications where environmental concerns take precedence. The ability of whey protein to effectively inhibit hydrate formation, combined with its natural origin and biodegradable properties, positions it as an attractive candidate for future research in the field of deep-sea hydrate risk management.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"79 10","pages":"6735 - 6749"},"PeriodicalIF":2.5,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145242796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}