Cleaner Chemical Engineering最新文献

{"title":"Influence of coal rank, ash, mineral content, and maceral composition on CO2 adsorption in South African coals","authors":"Kasturie Premlall,&nbsp;Lawrence Koech","doi":"10.1016/j.clce.2025.100160","DOIUrl":"10.1016/j.clce.2025.100160","url":null,"abstract":"<div><div>This study investigated the influence of coal rank, ash content, mineral matter, and maceral composition on the CO₂ adsorption capacity of ten distinct South African coal samples. A high-pressure volumetric adsorption system (HPVAS) was utilized to assess CO₂ sorption characteristics under supercritical conditions at 35 °C and pressures up to 85 bar. Comprehensive characterization, including proximate and ultimate analysis, petrographic analysis, and density determination, was conducted to understand how these factors influence CO₂ adsorption. The findings reveal that higher-rank coals (HRC), particularly those with vitrinite reflectance above 1.2%, demonstrated superior CO₂ adsorption capacities, reaching up to 2.17 mmol/g. Medium-rank coals (MRC) with higher inertinite content showed lower adsorption capacities, with the lowest recorded at 0.78 mmol/g, except for the IN coal sample. CO₂ adsorption increased with vitrinite reflectance, particularly within the 0.51% to 0.81% range for medium-rank coals. Linear increase in CO₂ adsorption capacity was noted as carbon content increased from MRC towards HRC particularly in SM and AN coals. An increase in volatile matter content corresponded with a significant decline in CO₂ sorption capacity. Additionally, a negative correlation between ash content, mineral matter, liptinite, inertinite, and CO₂ adsorption capacity was evident, likely due to pore obstruction and reduced surface area. Liptinite-rich coals, such as BL, GN, EM, and WG, exhibited decreased adsorption capacity, with BL showing the highest liptinite content at 5.5%. The analysis indicates that while ash content influences sorption capacity, the organic matter, especially vitrinite, serve as the primary sites for gas adsorption. The findings of this study will enhance understanding of the CO₂ adsorption behaviour of South African coals supporting the funding from highly intensive CO₂ emitting industries to enable further research of carbon capture and storage (CCS) pilot projects tailored to regional coal properties.</div></div>","PeriodicalId":100251,"journal":{"name":"Cleaner Chemical Engineering","volume":"11 ","pages":"Article 100160"},"PeriodicalIF":0.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Valorization of tannery-derived FAMEs into bio-based epoxides via chemo-enzymatic synthesis","authors":"Víctor Deroncelé ,&nbsp;Ismael Tahmaz ,&nbsp;Sílvia Sorolla ,&nbsp;Anna Bacardit","doi":"10.1016/j.clce.2025.100195","DOIUrl":"10.1016/j.clce.2025.100195","url":null,"abstract":"<div><div>The urgent transition toward low-carbon chemical manufacturing has prompted the development of renewable alternatives to fossil-based epoxy intermediates. This study presents an integrated and resource-efficient chemo-enzymatic route for the synthesis of epoxidized methyl oleate (EMO) from fatty acid methyl esters (FAMEs) derived from tannery waste—a lipid-rich but underutilized industrial residue. A single-step urea complexation achieved 86.7 ± 0.6 % methyl oleate purity with a 38.1 ± 0.9 % recovery yield, while the saturated-rich co-product (∼40 %) exhibited physicochemical properties suitable for biodiesel or lubricant applications.</div><div>Subsequent epoxidation was carried out using immobilized <em>Candida antarctica</em> lipase B (Novozym® 435) and in situ generated performic acid, yielding an oxirane oxygen content of 6.42 ± 0.14 %, corresponding to &gt;90 % conversion of double bonds under mild conditions. The enzyme retained 72 % of its initial activity after ten reuse cycles, significantly enhancing process circularity and reducing catalytic costs.</div><div>Green chemistry metrics were favorable: atom economy reached 86 %, solvent recovery exceeded 85 %, and the E-factor remained as low as 0.86 kg waste/kg EMO. A cradle-to-gate life cycle assessment (LCA) estimated a global warming potential (GWP) of 1.92 kg CO₂-eq/kg EMO—representing a 63 % reduction compared to petrochemical benchmarks. Economic analysis at the 1000 t/year scale yielded a production cost of €1.57/kg with an internal rate of return (IRR) of 15 %.</div><div>Overall, this work demonstrates how lipid-rich industrial residues can be converted into high-value bio-based epoxides through a scalable and environmentally sound chemo-enzymatic route, aligning with circular economy principles and green chemistry targets.</div></div>","PeriodicalId":100251,"journal":{"name":"Cleaner Chemical Engineering","volume":"11 ","pages":"Article 100195"},"PeriodicalIF":0.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144723823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Waste beverage can-derived aluminum oxide supported on graphene oxide for the effective removal of ciprofloxacin from aqueous medium","authors":"Md. Shadman Hossain ,&nbsp;Sabina Yasmin ,&nbsp;Nosheen Tabassum Dipannita ,&nbsp;Md. Sanwar Hossain ,&nbsp;Suprim Chandra Sarker ,&nbsp;Tajnin Jahan ,&nbsp;Md. Alamgir Kabir ,&nbsp;Ratan Kumar Paul ,&nbsp;Md Humayun Kabir","doi":"10.1016/j.clce.2025.100214","DOIUrl":"10.1016/j.clce.2025.100214","url":null,"abstract":"<div><div>In this study, graphene-based aluminum oxide (GO/Al₂O₃) was successfully synthesized using waste beverage cans as the aluminum source and graphite electrodes from spent dry cells as the carbon source. The resulting material was employed as an effective adsorbent for removing ciprofloxacin (CIP) from aqueous solutions. The synthesized GO/Al₂O₃ composite was characterized using energy-dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), X-ray diffractometry (XRD), transmission electron microscopy (TEM), and Fourier transform infrared spectroscopy (FTIR). Batch experiments were carried out to evaluate the influence of pH, adsorbent dose, contact time, initial CIP concentration, and temperature, and to identify the optimal adsorption conditions. Under optimal conditions (pH 6, adsorbent dose 0.1 g/L, initial CIP concentration 0.2 mg/L), the composite removed 98.8 % of CIP within 10 minutes. The improved correlation between the experimental data and the pseudo-second-order kinetic model suggests the interaction of CIP with this adsorbent is mainly controlled by the chemisorption process. The isotherm data of the adsorption process is best fitted with the Freundlich isotherm model, indicating that the adsorption is multilayer adsorption to the surfaces of GO/Al₂O₃. Therefore, the straightforward, cost-effective, and eco-friendly synthesis of Graphene based Aluminium Oxide (GO/Al₂O₃) from waste beverage can and dry cells might be appropriate to manufacture a compelling and auspicious low-cost adsorbent for the removal of CIP from the aqueous media.</div></div>","PeriodicalId":100251,"journal":{"name":"Cleaner Chemical Engineering","volume":"12 ","pages":"Article 100214"},"PeriodicalIF":0.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145623592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Oily-wastewater treatment using eco-friendly ceramic membranes derived from sugarcane bagasse waste: Optimization using response surface methodology","authors":"Nurhayati Jamalludin ,&nbsp;Mohd Riduan Jamalludin ,&nbsp;Siti Khadijah Hubadillah ,&nbsp;Mohd Hafiz Dzarfan Othman ,&nbsp;Mohd Azizi Hakim Jamalludin","doi":"10.1016/j.clce.2025.100151","DOIUrl":"10.1016/j.clce.2025.100151","url":null,"abstract":"<div><div>Treating oily-wastewater through separation technologies with advanced properties such as environmental-friendly and low cost is a challenging work. Herein, we successfully fabricated superhydrophic-superoleophilic green ceramic hollow fibre membrane prepared from sugarcane bagasse waste and modified through sol-gel method. Later, this study aims to optimize wastewater behaviour (pH, concentration and temperature) for oily-wastewater separation through green ceramic membrane using central composite design (CCD) of response surface methods (RSM). The three effective parameters analyzed were oil pH (3–11), oil concentration (10–10000 ppm), oil temperature (30–100 °C) and its combined effect to obtain high oil flux and excellent oil separation efficiency. Through the investigation it was found that the optimum value of pH, oil concentration and temperature were 10, 10.01 ppm and 69.04 °C. The result of the study has suggested that there are oil temperature has significantly influence the efficiency of the synthesized membrane separation performance. The fitted model was found to agree with the predicted and actual oil flux as well as separation efficiency which indicated by the high values of R² = 0.954 and R²_adj = 0.986. According to the optimized condition, the finding reported 4.71 % and 0.746 % average error for oil flux and separation efficiency which agrees with the forecasted and actual values. The novelty of this study lies in the development of an eco-friendly ceramic membrane derived from sugarcane bagasse waste, offering an innovative and sustainable solution for oily-wastewater treatment.</div></div>","PeriodicalId":100251,"journal":{"name":"Cleaner Chemical Engineering","volume":"11 ","pages":"Article 100151"},"PeriodicalIF":0.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143162094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preliminary investigations of sustainable magnetic catalyst-based biochar derived spent coffee ground for biodiesel production from waste cooking oil","authors":"Jayaraja Silvaraja ,&nbsp;Noor Yahida Yahya ,&nbsp;Muzakkir Mohammad Zainol ,&nbsp;Yong Siang Lee","doi":"10.1016/j.clce.2025.100148","DOIUrl":"10.1016/j.clce.2025.100148","url":null,"abstract":"<div><div>Due to the shortage of energy resources and environmental issues, the study presents a sustainable approach for biodiesel production from waste cooking oil (WCO) catalyzed using magnetic catalyst-based biochar derived spent coffee ground (SCG). The added properties of magnetic and basic towards this catalyst was prepared by facile carbonization of one-pot SCG with Fe(III) and potassium hydroxide as activation agent at 700 °C for 2 h The characteristics of the catalyst was analyzed through Fourier transform spectroscopy (FTIR), scanning electron microscope coupled with energy dispersive X-ray (SEM-EDX), x-ray diffraction and Brunauer–Emmett–Teller (BET) surface area analysis. The performance of the catalyst was explored by the parametric effect on biodiesel yield from WCO. The parameters included are methanol to oil molar ratio, dosage of the catalyst and reaction time. The results showed that the catalyst exhibited excellent catalytic activity, with a biodiesel yield of 92.31% under 6:1 methanol to oil molar ratio, 1 wt% of catalyst dosage and 2 h of reaction time and the magnetism observation shows the catalyst own a magnetic property. In addition, the findings suggest that this approach offers a promising contribution for the development of a circular economy in the biofuel industry based on the utilization of waste to wealth.</div></div>","PeriodicalId":100251,"journal":{"name":"Cleaner Chemical Engineering","volume":"11 ","pages":"Article 100148"},"PeriodicalIF":0.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143162092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing solar still performance using external condensers and floating fins: A comparative study","authors":"Tanvir Rahman ,&nbsp;Lailatul Nehar ,&nbsp;Yeamin Prodhan ,&nbsp;Shahiduzzaman Shahed ,&nbsp;Shahriar Al Hasib ,&nbsp;M S Rahman ,&nbsp;S.S. Tuly","doi":"10.1016/j.clce.2025.100167","DOIUrl":"10.1016/j.clce.2025.100167","url":null,"abstract":"<div><div>Solar distillation is a sustainable and cost-effective method for producing potable water from brackish sources. However, its widespread adoption is limited because of low daily freshwater yield and inefficient solar energy utilization due to slow evaporation and condensation processes. This study presents a series of modifications to enhance these processes: floating aluminum fins (FAF) to improve evaporation and two types of external condensers (single rectangular/REC and multiple cylindrical/MCEC) to optimize condensation. Four configurations were tested: Case I (conventional solar still/CSS), Case II (CSS + FAF), Case III (CSS modified with FAF + REC), and Case IV (CSS modified with FAF + MCEC). Key results demonstrate that Case IV (FAF + MCEC) achieved the highest performance, with an average daily yield of 2725 ml/day (80.36 % higher than CSS), peak instantaneous efficiency of 39.7 %, and exergy efficiency improvements of 163 % over CSS. Environmental analysis revealed that Case IV mitigated 420 kg of CO₂ emissions over its lifetime, earning $135 in carbon credits, offsetting its higher embodied emissions (1450 kg CO₂) from manufacturing. The system's payback period of 273 days and modular design highlight its economic and scalability potential for water-scarce regions. These findings underscore the viability of floating fins and multi-condenser designs to simultaneously address water scarcity, energy efficiency, and environmental sustainability.</div></div>","PeriodicalId":100251,"journal":{"name":"Cleaner Chemical Engineering","volume":"11 ","pages":"Article 100167"},"PeriodicalIF":0.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143833268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multifaceted applications of dye-saturated biochar: Agronomic amelioration, thermochemical valorization, and catalytic efficacy in advanced environmental remediation paradigms","authors":"Sandra Ramachandran ,&nbsp;Anshuman Gupta ,&nbsp;Neelaambhigai Mayilswamy ,&nbsp;Amrita Nighojkar ,&nbsp;Balasubramanian Kandasubramanian","doi":"10.1016/j.clce.2025.100164","DOIUrl":"10.1016/j.clce.2025.100164","url":null,"abstract":"<div><div>The intensifying challenge of dye-laden industrial wastewater necessitates innovative, sustainable remediation technologies to mitigate ecological and human health risks. Sewage sludge-derived biochar (SSB) has emerged as a cost-effective and versatile adsorbent, attributed to its high surface area, hierarchical porosity, and diverse surface functional groups, which facilitate superior dye adsorption under both batch and continuous flow systems. This review provides a critical evaluation of SSB's adsorption performance, elucidating mechanisms such as π-π interactions, electrostatic attraction, and surface complexation. Regeneration methods, including thermal treatment, chemical washing, and solvent desorption, are analyzed in terms of efficiency and scalability. Furthermore, the secondary applications of dye-saturated biochar, including its use as a soil amendment to enhance microbial activity and nutrient retention, its valorization as a high-calorific energy source, and its role as a catalyst in advanced oxidation processes, are systematically explored. The review identifies key limitations, such as feedstock variability, competing ions in wastewater, and energy-intensive production processes, and proposes strategies for optimizing biochar synthesis and functionalization. By bridging laboratory-scale studies with industrial applications, this work delineates the economic and environmental viability of SSB and advances the development of scalable, sustainable wastewater treatment solutions.</div></div>","PeriodicalId":100251,"journal":{"name":"Cleaner Chemical Engineering","volume":"11 ","pages":"Article 100164"},"PeriodicalIF":0.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143685521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Strategic routes in valorising pre-processed coal fly ash to promote circular economy","authors":"Brinthan Kanesalingam ,&nbsp;W. Ashane M. Fernando ,&nbsp;Chulantha Jayawardena ,&nbsp;Dinesh Attygalle ,&nbsp;D.A.S. Amarasinghe ,&nbsp;Sandeep Panda","doi":"10.1016/j.clce.2025.100200","DOIUrl":"10.1016/j.clce.2025.100200","url":null,"abstract":"<div><div>Coal is a well-known for power generation, particularly in developing countries, due to its favourable economic benefits. Its combustion generates large quantities of waste by-products including coal fly ash (CFA), bottom ash, and noxious gases. These waste components challenge global movements towards sustainability and exploring ways to manage these by-products is of marked importance. Single-component separation of CFA is often reported in the literature, leaving out means for comprehensive utility (i.e., multi-component extraction), which challenges the circular economy aspects of CFA utilisation. To this end, we identify the requirement for multi-stage processing of CFA and herein, a thorough account of the opportunities associated with pre-processing of CFA is presented. As a result, we recognise washing cycles as a primary pre-processing strategy that paves the way for various downstream value-added products, namely cenospheres, fertiliser precursors, critical elements and zeolite precursors. Furthermore, to validate our premise, we propose a process flow to recover these valuable components through a preliminary experimental approach. These experiments concentrated on synthesising zeolites for wastewater treatment and the remaining solid (top and bottom) and liquid phases showed promise for extracting valuable components. Notably, the solution was enriched in fertiliser ions and the floating solid fraction was populated with cenospheres. While observing potential pathways for critical elements recovery and recycling the spent zeolites, our approach conforms to the sustainability and circular economy of CFA with cleaner chemical engineering process strategies with further studies being recommended to appraise its scalability and efficiency improvements.</div></div>","PeriodicalId":100251,"journal":{"name":"Cleaner Chemical Engineering","volume":"11 ","pages":"Article 100200"},"PeriodicalIF":0.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144861217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Physicochemical insight of phosphonium-based ionic liquid with carbocyclic sugar-based inositol derivative","authors":"Bhupendra Singh Banjare ,&nbsp;Manoj Kumar Banjare ,&nbsp;Nitai Sarkar ,&nbsp;Kamalakanta Behera ,&nbsp;Dolly Baghel ,&nbsp;Benvikram Barman ,&nbsp;Swati Chandrawanshi ,&nbsp;Roman Kumar Aneshwari ,&nbsp;Indrapal Karbhal ,&nbsp;Manmohan Lal Satnami ,&nbsp;Kallol Kumar Ghosh","doi":"10.1016/j.clce.2025.100179","DOIUrl":"10.1016/j.clce.2025.100179","url":null,"abstract":"<div><div>Ionic liquids (ILs) are widely utilized as solubilizers, transporters, and agents for enhancing the efficacy of various components. In this study, the phosphonium-based ionic liquid (PIL) trihexyltetradecylphosphonium bis(2,4,4-trimethylpentyl)phosphinate ([P666(14)][TMPP]) was investigated for its synergic interaction with synthesized carbocyclic sugar-based inositol derivative 4-O-Tosyl-6-O-benzyl-<em>myo</em>-inositol-1,3,5-orthoformate (referred to as the tosyl derivative). These interactions were explored using a range of techniques including FTIR spectroscopy, dynamic light scattering (DLS), surface tension, conductivity, colorimetry, and viscometry at 299.0 ± 0.5 K temperature. Key parameters in physicochemical insight, such as the zeta potential, particle size distribution, critical micelle concentrations (CMC) and various thermodynamic parameters (Δ_G^°_ads, Δ_G^°_trans, ∆G^s_min, Δ_G^°_m, Δ_G^°_m,tail) and interfacial parameters (Г_max, A_min, π_CMC, pC₂₀, γ_CMC) were calculated. A significant reduction in CMC values of the PIL was observed with increasing concentrations (mM) of the tosyl derivative. The findings of the interfacial parameters indicated that when the concentration of tosyl derivative increased, the values of A_min, π_CMC, and pC₂₀ enhanced while the values of γ_CMC, Γ_max, and CPP undergo reduction. Further, conductometric and colorimetric studies give similar results for CMC value. The higher negative values of Δ_G^°_m and Δ_G^°_ads have been shown the micellization and adsorption properties became more spontaneous. The rheological characteristics of PIL, such as reducing, intrinsic, and relative viscosities, are more significantly impacted by higher concentrations of the tosyl derivative. The FTIR spectral response confirmed shifts in different stretching and bending modes indicating strong intermolecular interactions. DLS data further indicated that the polar nature of the tosyl derivative promotes the formation of significantly larger micelles in the PIL–tosyl derivative system (particularly at 2.0 mM) compared to the pure due to the tosyl derivative showing co-solvent character. These findings suggest potential applications for such synergistic systems in household products, pharmaceutical sciences, cosmetics, and drug delivery.</div></div>","PeriodicalId":100251,"journal":{"name":"Cleaner Chemical Engineering","volume":"11 ","pages":"Article 100179"},"PeriodicalIF":0.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143942557","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Adsorption-photodegradation performance of Silver Titanate for Methylene blue removal: Kinetics, thermodynamics and isotherm studies","authors":"Nawrin Rahman Shefa ,&nbsp;Most. Afroza Khatun ,&nbsp;Ahmed Hasnain Jalal ,&nbsp;M. Jasim Uddin ,&nbsp;Md. Wasikur Rahman","doi":"10.1016/j.clce.2025.100163","DOIUrl":"10.1016/j.clce.2025.100163","url":null,"abstract":"<div><div>Silver titanate (AgTO) was synthesized via an ion-exchange reaction between sodium titanate and silver nitrate. This study investigates the efficiency of AgTO in the combined adsorption-photodegradation process for removing Methylene Blue (MB). The synthesized material was characterized using FTIR, XRD, SEM, and EDX techniques. Batch adsorption experiments were conducted to assess the effects of AgTO dosage (0.1–1.0 g/L), initial MB concentration (5–20 mg/L), pH (3–11), and temperature (313–333 K). The highest MB removal efficiency (90 %) was achieved at 313 K, pH 3, and an initial MB concentration of 5 mg/L. The photocatalytic performance of AgTO was further evaluated under an 18-Watt UV light source, confirming its effectiveness in MB degradation. Adsorption followed pseudo-second-order (PSO) kinetics, while photodegradation adhered to first-order (FO) kinetics. Thermodynamic analysis indicated that both adsorption and photodegradation were endothermic processes. The Langmuir isotherm model, with a maximum adsorption capacity of 5.24 mg/g, provided the best fit for the adsorption data. Overall, as-prepared AgTO exhibited dual-functionality in a combined adsorption-photodegradation system for MB removal, revealing its high efficiency, kinetics, and thermodynamic feasibility, thereby establishing AgTO as a promising candidate for wastewater treatment.</div></div>","PeriodicalId":100251,"journal":{"name":"Cleaner Chemical Engineering","volume":"11 ","pages":"Article 100163"},"PeriodicalIF":0.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143619661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}