Journal of the Indian Chemical Society最新文献

{"title":"Magnetic acidic TiO2 catalyst for the dehydration of fructose and glucose to 5-HMF under deep eutectic solvents","authors":"Imran Hasan,&nbsp;Fahad A. Alharthi","doi":"10.1016/j.jics.2025.101956","DOIUrl":"10.1016/j.jics.2025.101956","url":null,"abstract":"<div><div>This study investigates a sulfonic acid-functionalized γ-Fe₂O₃@TiO₂ catalyst for the hydrothermal dehydration of carbohydrates to 5-hydroxymethylfurfural (5-HMF). The catalyst was thoroughly characterized using a range of analytical techniques, including Fourier Transform Infrared Spectroscopy (FT-IR), X-ray Diffraction (XRD), Transmission Electron Microscopy (TEM), Brunauer–Emmett–Teller (BET) surface area analysis, Vibrating Sample Magnetometry (VSM), Field Emission Scanning Electron Microscopy (FESEM), Energy Dispersive X-ray Spectroscopy (EDX), and acidity measurements. Reaction condition optimization using deep eutectic solvents (DESs) showed that the catalyst efficiently converts 0.75 M fructose and glucose into 5-HMF with yields of up to 98 % and 96 %, respectively, at 60 °C. The catalyst's performance is attributed to a balance between surface acidity and mesoporous structure, which governs active site accessibility and selectivity. This study underscores the potential of sulfonated titania-based materials as efficient and reusable catalysts for green biomass valorization, thereby supporting the sustainable production of bio-based platform chemicals.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"102 9","pages":"Article 101956"},"PeriodicalIF":3.2,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679783","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":"Density Functional Theory (DFT) calculations for the adsorptive voltammetric determination of Meloxicam using a paste electrode made of Functionalized Carbon nanotubes","authors":"Rabia Marwat ,&nbsp;Amna Bibi ,&nbsp;Abdul Niaz ,&nbsp;Sania Bibi ,&nbsp;Muhammad Iqbal Zaman ,&nbsp;Sehrish Sarfaraz ,&nbsp;Jamie Morgan","doi":"10.1016/j.jics.2025.101951","DOIUrl":"10.1016/j.jics.2025.101951","url":null,"abstract":"<div><div>Meloxicam (MLC) is a nonsteroidal anti-inflammatory drug (NSAID) frequently used for the treatment of osteoarthritis and arthritis. In the present work, a simple and sensitive differential pulse voltammetric (DPV) method has been investigated for the determination of MLC drug using functionalized carbon nanotubes paste electrode (f-CNTs-PE). The acid treated CNTs were investigated by TEM, FT-IR and XPS techniques, which showed carboxylated functional groups in their structure. An adsorptive stripping voltammetric (AdSV) technique was employed to determine MLC in a 0.25 M Na₂HPO₄ solution at pH 9 using accumulation time (t_a) of 5 min at open circuit potential. The functionalized electrode exhibited good eletrocatalytic activity for the oxidation of MLC at an oxidation potential of +0.45V, owing to the strong interaction ability of the surface functional groups. Under optimized conditions, the proposed electrode demonstrated high sensitivity toward MLC, with good linear performance (R² = 0.9944) between peak current and MLC concentration in the range of 0.1–50 μM and a limit of detection (LOD) of 5 × 10⁻⁷ M. The interaction ability of the f-CNTs for MLC was also confirmed through density functional theory (DFT) calculations at the ωB97XD/6-31G (d,p) level using Gaussian 09 package. The high values of interaction energies (E_int) and the low HOMO-LUMO energy gap (E_H-L) of MLC@CNTs-COOH + HN₂ complex confirmed the sensitivity of CNTs towards MLC. Furthermore, the natural bond orbital (NBO) analysis and the charge transferred from MLC to CNTs were consistent with the voltammetric oxidation of MLC at the CNTs surface. Finally, the voltammetric method showed good selectivity for MLC in the presence of common interfering agents. The low cost and easily renewable CNTs-PE was successfully applied for the determine MLC in pharmaceutical tablets and in a human urine sample with better recoveries.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"102 9","pages":"Article 101951"},"PeriodicalIF":3.2,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144696997","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":"Temperature effects on Cu2+ removal from synthetic wastewater using alumina-rich refining slag: Performance and mechanism","authors":"Yi Huang ,&nbsp;Jiawei Sun ,&nbsp;Zulv Huang ,&nbsp;Hui Fu ,&nbsp;Xiangdong Qing ,&nbsp;Li Lin","doi":"10.1016/j.jics.2025.101952","DOIUrl":"10.1016/j.jics.2025.101952","url":null,"abstract":"<div><div>In this study, the influence of temperature on Cu²⁺ removal efficiency by alumina(Al)-rich refining slag (RS) from synthetic wastewater prepared using CuSO₄ was investigated and the removal mechanisms at different temperatures were elucidated. Batch experiments conducted at 20–80 °C revealed that elevated temperatures significantly enhanced Cu²⁺ removal efficiency, with optimal dosage requirements decreasing dramatically from 13-19 g/L at 20 °C to 0.2–0.4 g/L at 80 °C for achieving &gt;99 % removal efficiency within 15 min. The enhanced performance was attributed to the accelerated hydration of Ca₁₂Al₁₄O₃₃ in RS. This process increased the solution alkalinity and promoted the formation of CuCaAl-layered double hydroxide (LDH) through co-precipitation with Ca²⁺ and Al(OH)₄^- ions, wherein SO₄²⁻/CO₃²⁻ anions were intercalated. At 20 °C, CuCaAl-LDH was less likely to be generated and Cu(OH)₂ precipitation was a primary Cu²⁺ removal route. Concurrently, hydrolysis of CaS in RS released S²⁻ ions, enabling temperature-independent CuS precipitation across all tested temperatures. These findings highlighted Al-rich RS as a low-cost precipitant for efficient Cu²⁺ sequestration, with optimal performance achieved at 60–80 °C. Moreover, the in-situ formed LDH phases, acting as an excellent adsorbent, rendered the Cu²⁺-treated RS a potential multifunctional material for wastewater remediation.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"102 9","pages":"Article 101952"},"PeriodicalIF":3.2,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679784","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":"Hydrothermal synthesis, characterization, and photocatalytic degradation of Rhodamine B dye of triazole modified molybdenum oxide","authors":"R. Bagtache ,&nbsp;A. Lahmek ,&nbsp;W. Douba ,&nbsp;A.M. Djaballah ,&nbsp;M. Trari","doi":"10.1016/j.jics.2025.101949","DOIUrl":"10.1016/j.jics.2025.101949","url":null,"abstract":"<div><div>Molybenuym oxide triazole [MoO₃(Htrz)_0.5]; Htrz = 1,2,4 Triazole] (Mo-Htz) was synthesized for the first time by hydrothermal route at 180 °C by using heteropolyacid as molybdenum source. The as-prepared material was characterized by X-Ray Diffraction (XRD), UV visible diffuse reflectance, thermal analysis, FT-IR and Raman spectroscopies. The XRD pattern shows narrow peaks and Mo-Htz crystallizes in an orthorhombic symmetry (SG: <em>Pbcm</em>): <strong><em>a</em></strong>/Å: 3.933(1), <strong><em>b</em></strong>/Å: 13.856(1), <strong><em>c</em></strong>/Å: 13.367(4). The crystal structure consists of Mo octahedron bonded to Htz molecules forming a layered structure with double [Mo₂O₆ (Htrz)]_n chains connected via a corner-sharing connection. Raman spectroscopy shows characteristic peaks of Mo<img>O, O–Mo–O and O<img>Mo<img>O for MoO₃. The FT-IR spectrum corroborates the structure of the compound and confirms the existence of Htz and Mo–O bonds. SEM image displays a thin lamellar structure and EDS analysis quantify the elemental composition of a material.</div><div>The band gap energies change from 2.93 eV (bare MoO₃) to 2.95 eV (Mo-Htz) due to synergy effect. The current-potential (J-E) curve plotted in Na₂SO₄ electrolyte showed a medium hysteresis with electrochemical stability. The <strong><em>n</em></strong>-type semi conductivity, was indicated by negative slope of the capacitance⁻² - potential (C⁻² - E) graph and supported by the electrochemical impedance spectroscopy (EIS) under visible light illumination. The conduction band (4.19 eV/−0.56 V_<em>SCE</em>), is formed by the Mo⁶⁺: <em>3d</em> orbital, where excited electrons reduce oxygen into O₂^•− radicals, involved in the Rhodamine B (Rh B) oxidation. An abatement of 60 % was reached by coupling “adsorption/photocatalysis” (5 h) under visible light. The degradation of Rh B follows a first order kinetic with a half-life of ∼3 h.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"102 9","pages":"Article 101949"},"PeriodicalIF":3.2,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679782","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":"Anthracite/talc-based porous activated composite loaded with DTAB surfactant for Cr(VI) adsorption: Characterization, performance, and mechanism","authors":"Esraa A. Abdelmonem ,&nbsp;Ahmed S.A.A. Abu Sharib ,&nbsp;Ahmed S. Ouda ,&nbsp;Ebtesam Al-Olayan ,&nbsp;S.H. Kenawy ,&nbsp;Zichao Li ,&nbsp;Aliaa M. Badawy ,&nbsp;Moaaz K. Seliem","doi":"10.1016/j.jics.2025.101945","DOIUrl":"10.1016/j.jics.2025.101945","url":null,"abstract":"<div><div>A mixture of anthracite (An) and heated talc (HT) was activated with sodium silicate and then coated with dodecyltrimethylammonium bromide (DTAB) to prepare a new porous adsorbent (DTAB-HT/An) for removing Cr(VI) from solutions. FTIR, zeta potential, FESEM/EDX, and XRD methods demonstrated the effective modification of the adsorbent by the DTAB surfactant. The efficiency of DTAB-HT/An in removing Cr(VI) ions was enhanced to 91 % by DTAB support at the optimum pH of 3.0, as compared to 62 % of the untreated HT/An blend. Within the range of 25–55 °C, the adsorption data were fitted using conventional models, and the maximum capacities, as calculated by the Langmuir equation, varied between 162.60 and 124.03 mg/g. Furthermore, the density of DTAB-HT/An energetic sites, the elimination capacities at saturation, and the amount of Cr(VI) removed by each functional group were all analyzed though the statistical physics theory. The removal of Cr(VI) was found to be dominated by dissimilar mechanisms (i.e., surface complexation, pore filling, and electrostatic attraction), according to the experiments and theoretical studies. Over the adsorption process, Cr(VI) and Cr(III) displayed distinct geometric behaviors (mixed or vertical orientation) and interaction mechanisms (multi-docking or multi-ionic). Energetic and thermodynamic functions suggested that the adsorption system was exothermic and directed by a spontaneous mechanism. Based on the regeneration results up to six cycles, the DTAB-HT/An was really stable and appropriate in wastewater treatment.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"102 9","pages":"Article 101945"},"PeriodicalIF":3.2,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144702361","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":"One-dimensional Sb-based perovskite-like material: Synthesis, structural characterization, Hirshfeld surface analysis, vibrational, optical properties and DFT calculations","authors":"Hela Ferjani","doi":"10.1016/j.jics.2025.101947","DOIUrl":"10.1016/j.jics.2025.101947","url":null,"abstract":"<div><div>One-dimensional (1D) organic-inorganic hybrid perovskites have garnered significant interest because of their outstanding photoelectric properties. This study reports the synthesis and structural characterization of the novel antimony-based organic-inorganic hybrid material [Allylimidazolium]₂SbCl₅, (1), which crystallizes in the monoclinic <em>C</em>2/<em>c</em> space group with a one-dimensional [SbCl₅]^2- polymeric chain adopting a zigzag configuration through corner-sharing octahedra. Hydrogen bonds and π-stacking interactions play a fundamental function in stabilizing the crystal lattice, as confirmed by Hirshfeld surface analysis. Infrared (IR) and Raman spectroscopy validate the vibrational characteristics, while optical studies reveal UV–visible absorption with direct band gaps of 2.77 eV, indicating its semiconducting properties. Thermogravimetric Analysis (TGA) indicates that (1) maintains stability beyond 100 °C. [Allylimidazolium]₂SbCl₅ produces bluish-red dual-emission bands at 443 and 583 nm. Density Functional Theory (DFT) calculations offer valuable insights into the electronic structure, confirming a pronounced charge-transfer character, where the organic cation donates electrons, and the inorganic anion governs charge transport. Computational results show good agreement with experimental data, supporting the reliability of the theoretical analysis and providing insights into the electronic behavior of the material.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"102 9","pages":"Article 101947"},"PeriodicalIF":3.2,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144665750","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 bio-oil and biochar production from defatted microalgae biomass via microwave-assisted catalytic cracking","authors":"Thiviya AP Thanaraj ,&nbsp;Shafirah Samsuri ,&nbsp;Usman Bello ,&nbsp;Chai Yee Ho","doi":"10.1016/j.jics.2025.101944","DOIUrl":"10.1016/j.jics.2025.101944","url":null,"abstract":"<div><div>In this work, bio-oil and biochar were produced using microwave-assisted catalytic cracking (MACC) of defatted microalgae biomass (DMB) obtained from lipid extraction of <em>Chlorella vulgaris</em>. A maximum bio-oil yield of 58.34 % was achieved under optimized conditions, including 450 W of microwave power, a 10 % catalyst ratio, and a reaction time of 10 min. In comparison, the highest biochar yield of 65.11 % was recovered at 650 W, 10 % catalyst ratio, after 30 min. This shows that bio-oil yield is optimized under milder conditions, while biochar yield benefits from more intense and prolonged thermal treatment. Qualitative characterization revealed that the bio-oil exhibited low viscosity (9.74 mm²/s), indicating good flowability and resistance to oxidative degradation. Its notably high heating value of 41 MJ/kg is attributed to a high density (1.18 g/mL), suggesting a greater concentration of heavy hydrocarbons. Scanning Electron Microscopy (SEM) analysis showed that the biochar featured a porous structure with a high surface area. Additionally, Fourier-Transform Infrared Spectroscopy (FTIR) confirmed the presence of oxygenated functional groups in the biochar, at wavenumbers ranging between 1300 and 1800 cm⁻¹. Moreover, this study also compared the product yields obtained from MACC with those from conventional pyrolysis. The results show that MACC produced significantly higher yields of bio-oil and biochar, exceeding those of pyrolysis by 24.45 % and 24.23 %, respectively, while also reducing reaction time and enhancing energy efficiency.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"102 9","pages":"Article 101944"},"PeriodicalIF":3.2,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686746","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":"Biomass derived alkyl levulinate as a potential additive for aviation turbine fuel (Jet A-1 type): Blend formulations and assessment of physicochemical properties","authors":"Manjunath H. Lamani ,&nbsp;Ashutosh Tripathi ,&nbsp;Krishna M. Deshmukh ,&nbsp;Ashutosh Mishra ,&nbsp;Kirtikumar C. Badgujar ,&nbsp;Bhalchandra M. Bhanage","doi":"10.1016/j.jics.2025.101941","DOIUrl":"10.1016/j.jics.2025.101941","url":null,"abstract":"<div><div>The aviation fuel commonly used in airplane/jet turbine engine is fossil based petroleum fuel that is responsible for the soot, aromatics, particulate matter and greenhouse gases emission. Aviation transportation is severely affecting the Environment and finding as the most challenging sector in fulfilling the mission of decarbonization and net-zero emissions. A paradigm shift from conventional aviation fuels (CAF) to sustainable aviation fuel (SAF) is crucial that can reduce the environmental impact from the aviation emission. This typically involves the biobased or biomass derived carbon base liquid fuels or additives that typically blended to certain proportion in the aviation fuels. In view of this, the present work determines the applicability of various biomass-based alkyl levulinates (methyl, ethyl and butyl) as a potential additive for aviation turbine fuel (ATF). Various methyl, ethyl and butyl levulinate blends (0.25–10 %) with aviation fuel are subjected to determine the different properties (density, lubricity, kinematic viscosity, aromatic contents, smoke point emission, copper strip corrosion, freezing point, cetane index, net heat of combustion (energy content), thermal oxidation stability and CO₂ emission). Experimental results showed that, lubricity property, density, smoke point, corrosion inhibition ability, freezing point and kinematic viscosity is improved while aromatic contents, corrosion ability and soot emission decreases for levulinate blended aviation fuel. Interestingly CO₂ emission (kg/L) was determined and calculations suggested that, CO₂ emission was reduced by 8.86 % for the use of levulinate blended aviation fuel. The present laboratory experimental results demonstrated promising scope to use of alkyl levulinate as a potential possible additive for ATF (Jet A-1 type).</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"102 9","pages":"Article 101941"},"PeriodicalIF":3.2,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679781","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":"Preparation and photocatalytic degradation of PTCN/SnS2/Ti3C2 QDs composites","authors":"Qi Shi ,&nbsp;Siqi Huang ,&nbsp;Qi Xi ,&nbsp;Yanan Niu ,&nbsp;Nuan Wen ,&nbsp;Libo Du ,&nbsp;Yuguang Lv ,&nbsp;Tai Peng","doi":"10.1016/j.jics.2025.101921","DOIUrl":"10.1016/j.jics.2025.101921","url":null,"abstract":"<div><div>In this study, Ti₃C₂ quantum dots (QDs) were prepared via a simple hydrothermal method and loaded onto binary catalytic materials to construct ternary PTCN/SnS₂/Ti₃C₂ QDs composites for enhancing photocatalytic performance. The materials were characterized using techniques such as XRD, TEM, FT-IR, UV–vis, BET, XPS, and PL. The results showed that Ti₃C₂ QDs were uniformly dispersed on the surface of PTCN/SnS₂, forming a stable heterostructure. The specific surface area increased to 68.847 m²/g (5.6 times higher than that of PTCN), the visible light absorption edge redshifted to 532 nm, and the band gap narrowed to 2.1 eV. Under visible light, the composite exhibited degradation rates of 90.53 %, 79.53 %, 81.23 %, and 85.62 % for norfloxacin, pefloxacin, enrofloxacin, and ciprofloxacin, respectively. At the optimal doping amount (k = 0.0408 min⁻¹), the catalytic activity was 6.21 times that of pure PTCN and 2.87 times that of PTCN/SnS₂. Cyclic experiments demonstrated excellent stability of the composite, with a degradation rate remaining at 86 % after 5 cycles. This study is the first to construct the PTCN/SnS₂/Ti₃C₂ QDs ternary system and propose a Z-scheme charge transfer mechanism, providing new insights for the design of high-efficiency photocatalytic materials.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"102 9","pages":"Article 101921"},"PeriodicalIF":3.2,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679896","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 fermentation conditions for bioethanol production from oil palm trunk sap","authors":"Abdul Halim Norhazimah ,&nbsp;Teh Ubaidah Noh ,&nbsp;Siti Fatimah Mohd Noor","doi":"10.1016/j.jics.2025.101943","DOIUrl":"10.1016/j.jics.2025.101943","url":null,"abstract":"<div><div>Oil palm trunk (OPT) sap, a waste product generated during the felling of <em>Elaeis guineensis</em> (<em>E. guineensis</em>) trees, has been identified as an underutilized resource with significant potential for sustainable bioethanol production. In this study, fermentation parameters were optimized to maximize bioethanol yield from felled <em>E. guineensis</em> OPT sap using <em>Saccharomyces cerevisiae</em> (S. <em>cerevisiae</em>) Kyokai no. 7. A combination of Plackett–Burman design (PBD), steepest ascent method, and Box–Behnken design (BBD) was employed to screen and optimize key variables, including temperature, initial pH, fermentation time, yeast extract, sodium chloride, ammonium sulfate, magnesium sulfate, peptone, urea, and corn steep liquor (CSL). Among these, initial pH, peptone, and CSL were identified as the most significant effects and were selected for further optimization. The fermentation process was conducted using a batch strategy to enhance productivity and simulate scalable operation. The optimal conditions were predicted by BBD with pH 6.50, peptone at 6.80 g/L, and CSL at 13.28 g/L, which resulted in a validated bioethanol yield of 0.4800 ± 0.0275 g/g and a validation accuracy of 94.12 %. These findings demonstrated the viability of felled <em>E. guineensis</em> OPT sap as a promising fermentation substrate, which has been largely overlooked in bioethanol research. The integration of sequential statistical optimization techniques enabled efficient fine–tuning of key parameters to approach theoretical conversion limits. Overall, this work supported the potential of felled <em>E. guineensis</em> OPT sap as a sustainable feedstock for bioethanol production and offers a foundation for process scaling, cost analysis, and further refinement through strain or co–substrate diversification.</div></div>","PeriodicalId":17276,"journal":{"name":"Journal of the Indian Chemical Society","volume":"102 9","pages":"Article 101943"},"PeriodicalIF":3.2,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144663440","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}