Next SustainabilityPub Date : 2025-01-01Epub Date: 2024-10-03DOI: 10.1016/j.nxsust.2024.100076
Sabyasachi Rout , Sonali Yadav , Lipika G. Pansare , R. Shashidhar , Vandana Pulhani , A. Vinod Kumar
{"title":"Simultaneous removal of heavy metals and Escherichia coli from water using silver-doped hydroxyapatite-coated activated carbon nano composite-alginate beads","authors":"Sabyasachi Rout , Sonali Yadav , Lipika G. Pansare , R. Shashidhar , Vandana Pulhani , A. Vinod Kumar","doi":"10.1016/j.nxsust.2024.100076","DOIUrl":"10.1016/j.nxsust.2024.100076","url":null,"abstract":"<div><div>The scarcity of clean water due to heavy metal and microbial contamination is a global issue. In many parts of the world, heavy metals such as Pb, Cd, and U, along with bacteria like <em>Escherichia coli</em>, have been found to exceed permissible limits in groundwater and other water sources that the public depends on for daily drinking water. To address this, we have synthesized a novel composite material consisting of Ag-impregnated hydroxyapatite-coated activated carbon nanoparticles embedded in alginate beads, for the simultaneous removal of heavy metals (U, Pb, and Cd) and <em>Escherichia coli</em> from drinking water. The material's efficiency was evaluated through a series of batch and column experiments. Batch studies indicate 90 % sequestration of U within 5 hours and Pb and Cd within 7 hours, while <em>Escherichia coli</em> (10<sup>7</sup> cfu/mL) was eradicated instantly. The study confirms that sorption follows pseudo-second-order kinetics via chemisorption and ion-exchange mechanisms. Fixed-bed column studies, using a logistic growth model, showed strong agreement between theoretical and experimental parameters for the Bohart-Adams, Thomas, and Yoon-Nelson models. The beads demonstrated a high affinity for heavy metals, achieving complete removal and disinfection within an empty bed contact time of 1.12 minutes. Reusability studies indicate that even after the third regeneration and reuse cycle, removal efficiency remained about 95 % for U and Pb, and 85 % for Cd. Furthermore, the effects of variations in water quality parameters such as pH, dissolved carbonates, humic acid, and ionic strength (except for Cd) on removal efficiency were minimal. In summary, the study revealed that the Ag-impregnated hydroxyapatite-coated activated carbon nanoparticles embedded in alginate beads are an efficient, sustainable, and cost-effective material for the simultaneous removal of Pb, Cd, U, and <em>Escherichia coli</em> from water with diverse physicochemical properties.</div></div>","PeriodicalId":100960,"journal":{"name":"Next Sustainability","volume":"5 ","pages":"Article 100076"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142416009","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}
Next SustainabilityPub Date : 2025-01-01Epub Date: 2025-01-28DOI: 10.1016/j.nxsust.2025.100108
Okezie Emmanuel , Rozina , Thaddeus C. Ezeji
{"title":"Advances in carbon dioxide capture and conversion technologies: Industrial integration for sustainable chemical production","authors":"Okezie Emmanuel , Rozina , Thaddeus C. Ezeji","doi":"10.1016/j.nxsust.2025.100108","DOIUrl":"10.1016/j.nxsust.2025.100108","url":null,"abstract":"<div><div>Developing efficient strategies to capture carbon dioxide (CO<sub>2</sub>) is essential to addressing the escalating challenges of global warming. Despite being a major greenhouse gas, CO<sub>2</sub> holds significant potential as a sustainable feedstock for chemical production. It can serve as a solvent, a preservative, a raw material for producing fuels, carbonates, polymers, and chemicals, and as a recovery agent for processes such as enhanced coal bed methane and oil recovery. This review highlights significant progress made in CO<sub>2</sub> capture and its integration into various industrial applications. While technologies such as adsorption, absorption, membrane separation, and cryogenics have shown promise, challenges related to cost, scalability, and the efficiency of capture and utilization continue to pose significant barriers to widespread adoption. Innovative strategies, including integrated carbon capture and conversion (ICCC) and integrated carbon capture and utilization (ICCU), present promising pathways to reduce costs by combining capture and utilization processes within a single facility. Additionally, catalytic processes and biological systems, such as microalgae and microbial strains (e.g., acetogens), are paving the way for sustainable CO<sub>2</sub> conversion into high-value products. Successful large-scale deployment of these technologies will require sustained interdisciplinary collaboration, robust policy frameworks, and increased investment in research and development. Prioritizing sustainable energy development and management offers the potential to significantly reduce anthropogenic CO<sub>2</sub> emissions while creating useful products. Advancing these technologies will not only help in mitigating climate change but also promote the transition to a circular carbon economy, which aligns with global sustainability goals.</div></div>","PeriodicalId":100960,"journal":{"name":"Next Sustainability","volume":"6 ","pages":"Article 100108"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163063","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}
Next SustainabilityPub Date : 2025-01-01Epub Date: 2025-01-27DOI: 10.1016/j.nxsust.2025.100104
S.H. Mahmud , S.C. Das , A. Saha , T. Islam , D. Paul , M.W. Akram , M.S. Jahan , M.Z.I. Mollah , M.A. Gafur , R.A. Khan
{"title":"Effect of glass fiber hybridization and radiation treatment to improve the performance of sustainable natural fiber-based hybrid (jute/glass) composites","authors":"S.H. Mahmud , S.C. Das , A. Saha , T. Islam , D. Paul , M.W. Akram , M.S. Jahan , M.Z.I. Mollah , M.A. Gafur , R.A. Khan","doi":"10.1016/j.nxsust.2025.100104","DOIUrl":"10.1016/j.nxsust.2025.100104","url":null,"abstract":"<div><div>The current work aims to utilize sustainable natural fibers such as jute fiber in composite materials and a sustainable technology such as gamma (γ) irradiation to further treat the composites for their performance enrichment. First, synthetic glass fibers were hybridized to improve the performance of natural fiber composites (NFCs) with different stacking sequences. Jute fabrics were used as a natural fiber reinforcement and unsaturated polyester resin was employed as a thermoset polymer matrix. Composite laminates were manufactured by compression molding using a heat press machine. After hybridization, the mechanical properties and water resistance were improved compared to the neat NFCs (i.e., jute fiber composites, J0). The tensile strength, bending strength, tensile modulus, bending modulus, and impact strength were improved to 7–56, 5–53, 21–54, 27–69, and 199–387 %, respectively, than the J0. Further, gamma (γ) irradiation (5.0 kGy) was employed as a sustainable and chemical-free technology to treat the hybrid composite materials and improve the performance, and the optimum improvement was revealed for H3 (G<sub>2</sub>J<sub>4</sub>G<sub>2</sub>) hybrid composites. For H3, the enhancement of tensile, bending and impact strength was revealed at approximately 28, 65 and 27 %, respectively, while the tensile and bending modulus were exhibited at approximately 27 and 71 %, respectively, compared to their non-irradiated composite ones. Further characterization of the composites was studied by FTIR (Fourier Transform Infrared) spectroscopy and SEM (Scanning Electron Microscopy) experimentation.</div></div>","PeriodicalId":100960,"journal":{"name":"Next Sustainability","volume":"6 ","pages":"Article 100104"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163066","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}
Next SustainabilityPub Date : 2025-01-01Epub Date: 2025-11-11DOI: 10.1016/j.nxsust.2025.100208
Paul Rademacher, Alexandra Kaas, Christian Wilke, Urs A. Peuker
{"title":"Influence of foam composite in lithium-ion battery packs on their mechanical recycling","authors":"Paul Rademacher, Alexandra Kaas, Christian Wilke, Urs A. Peuker","doi":"10.1016/j.nxsust.2025.100208","DOIUrl":"10.1016/j.nxsust.2025.100208","url":null,"abstract":"<div><div>Lithium-ion batteries (LIB) play a key role in the energy transition, serving as storage solutions for both mobile and stationary applications. Recovering the valuable materials contained in LIB at the end of their life is central to developing a circular economy in line with sustainability principles.</div><div>Processes for the mechanical recycling of LIB have already been successfully developed and implemented, enabling most components of a LIB to be recovered, including the materials of the anode, cathode and separator foils, as well as the casing. The concentrate resulting from the coating of the electrode foils, which is called black mass, becomes an intermediate product for hydrometallurgical recycling processes for the recovery of lithium, among other materials.</div><div>Some OEM in the automotive industry are about to introduce cell-to-pack technologies, in which individual LIB cells are fixed and stabilised in position inside the large battery pack with the aid of a polymeric foam. This adds further materials to the battery pack. The effects of the foam on recycling are not yet known. Within the scope of this experimental work, several technological variants for enriching and separating the foam as an individual material fraction were investigated, achieving foam recoveries of between 79 % and 99 %. The overall goal is to minimise contamination of the valuable fractions by the foam. The effect of two different types of foam on the purity of the recycling products was analysed.</div></div>","PeriodicalId":100960,"journal":{"name":"Next Sustainability","volume":"6 ","pages":"Article 100208"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145519426","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":"Advancing green hydrogen production: Technological and economic perspectives on saltwater electrolysis","authors":"Sehba Anjum Mumtaz Ahmed , Kushagra Gabhane , Aparna Deshpande , Shilpa Kumari , Penumaka Nagababu , Sadhana Rayalu","doi":"10.1016/j.nxsust.2025.100187","DOIUrl":"10.1016/j.nxsust.2025.100187","url":null,"abstract":"<div><div>Saline water electrolysis provides a sustainable route for hydrogen production by directly utilizing saltwater without desalination. We report a custom-built electrolyzer employing a corrosion-resistant hierarchical titanium anode coated with RuO₂–IrO₂ and a Ni–SS cathode. The oxygen-selective anode effectively suppressed chlorine evolution in chloride-rich media, enabling stable operation. Electrolysis of 3 % NaCl solution produced 140.7 mmol h⁻¹ hydrogen at 17.89 mA cm⁻² in a 1-L reactor, with cell performance strongly dependent on salinity and current density. Continuous operation for 72 h under 5 V demonstrated durability, while optimization algorithms improved system efficiency. These results highlight the potential of saline water electrolysis as a scalable pathway for green hydrogen generation.</div></div>","PeriodicalId":100960,"journal":{"name":"Next Sustainability","volume":"6 ","pages":"Article 100187"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145108765","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":"Prospective non-edible sources for biodiesel production: A comprehensive conventional and bibliometric review","authors":"A.O. Oyero , H.B. Adedayo , A.A. Daniyan , S.A. Obayopo , S.B. Akintunde , K.A. Oladejo , C. Mbohwa","doi":"10.1016/j.nxsust.2025.100194","DOIUrl":"10.1016/j.nxsust.2025.100194","url":null,"abstract":"<div><div>Anticipated increases in Nigeria's energy consumption correlate with urbanization, improved living standards, and population expansion. As society becomes more mindful of dwindling fossil fuel reserves and environmental issues, biodiesel emerges as a viable solution to meet future energy needs in both domestic and industrial sectors. Various feedstock alternatives exist for biodiesel production, with non-edible vegetable oils gaining attention due to their non-competitive nature with food crops. Nonetheless, a thorough examination of the feasibility of converting non-edible oils into biodiesel is necessary. This scrutiny is vital as biodiesel derived from any feedstock must adhere to ASTM and DIN EN specifications to ensure its suitability as a fuel. This research presents a detailed examination, both qualitatively and bibliometrically, of potential non-edible oils suitable for biodiesel production in Nigeria. Additionally, the aim is to evaluate the evolution of research outputs related to non-edible feedstocks over time, with a specific focus on the involvement of Nigeria as a nation, various institutions, journals, and authors. The analysis primarily focuses on original research publications and conference presentations, using search commands limited to article titles containing \"Non-edible,\" \"Seed oils,\" and \"Nigeria.\" The results of the Scopus database searches were exported in BibteX format and further analyzed using R & R Studio. Findings indicate an increasing research interest over the past decade, with Jatropha, Neem, and Rubber seed oil appearing as the most frequently studied non-edible feedstocks in Nigeria. This study highlights the current research landscape and identifies promising directions for sustainable biodiesel development in the country.</div></div>","PeriodicalId":100960,"journal":{"name":"Next Sustainability","volume":"6 ","pages":"Article 100194"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218890","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}
Next SustainabilityPub Date : 2025-01-01Epub Date: 2025-09-30DOI: 10.1016/j.nxsust.2025.100192
Abdurrazzaq Ahmad , Somtochukwu Godfrey Nnabuife , Eni Oko , Alex Ibhadon
{"title":"Comprehensive review of advances and challenges in hydrogen liquefaction","authors":"Abdurrazzaq Ahmad , Somtochukwu Godfrey Nnabuife , Eni Oko , Alex Ibhadon","doi":"10.1016/j.nxsust.2025.100192","DOIUrl":"10.1016/j.nxsust.2025.100192","url":null,"abstract":"<div><div>Hydrogen liquefaction is essential to enable the global hydrogen economy by facilitating efficient hydrogen transport and storage. This review examines the fundamental thermodynamic principles, refrigeration cycles, and the critical role of ortho–para hydrogen conversion, including the latest developments in catalysts. Major challenges such as high energy consumption, capital costs, and boil-off losses are critically analysed with potential mitigation strategies. By thoroughly evaluating existing liquefaction processes and conceptual plant designs, this work identifies gaps and opportunities for improving efficiency and reducing costs. Emphasis is placed on novel refrigerants, process integration, and catalytic conversion methods. This review provides insights and a strategic roadmap for researchers, industry stakeholders, and policymakers to accelerate innovation and deployment of sustainable hydrogen liquefaction technologies, supporting the transition toward a decarbonised energy future.</div></div>","PeriodicalId":100960,"journal":{"name":"Next Sustainability","volume":"6 ","pages":"Article 100192"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218889","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}
Next SustainabilityPub Date : 2025-01-01Epub Date: 2025-11-22DOI: 10.1016/j.nxsust.2025.100216
Samyak Singh , Bhavana Dixit , Anupama Raj , Ajay Kumar , V. Baswanth
{"title":"Anthropogenic footprints on Sal Forests: A quantitative assessment of phytosociological attributes and diversity in an Indian Biosphere Reserve","authors":"Samyak Singh , Bhavana Dixit , Anupama Raj , Ajay Kumar , V. Baswanth","doi":"10.1016/j.nxsust.2025.100216","DOIUrl":"10.1016/j.nxsust.2025.100216","url":null,"abstract":"<div><div>Sal (<em>Shorea robusta</em>), a dominant tree species in tropical South Asian forests, plays a key role in supporting biodiversity, regulating microclimate, and maintaining ecosystem functions. However, escalating anthropogenic disturbances, i.e., grazing, felling, burning and collection of Non-Timber Forest Products (NTFPs) pose a significant threat to these forests. Understanding how tree diversity and forest structure respond to disturbances is crucial for effective management and conservation. Therefore, we examined how contrasting site conditions- closed (protected) versus open (disturbed) in Mixed and Pure Sal Forests influence phytosociological characteristics and diversity patterns in the Achanakmar-Amarkantak Biosphere Reserve (AABR), India. In total, 24 tree species spanning 22 genera and 16 families were documented, with higher species richness and family diversity in the Mixed Sal Forest (MSF) closed sites (CS). Bray–Curtis similarity analysis revealed 52.3 % compositional overlap among the sites, indicating changes linked to disturbance intensity. Tree density ranged from 340 to 920 individuals (ind) ha⁻¹ , with the highest in MSFCS (Mixed Sal Forest closed site) and the lowest in Pure Sal Forest (PSF) open sites (OS). The basal area was greatest in the PSFOS (50.62 m² ha⁻¹), due to the larger girth of <em>Shorea robusta</em>, which also exhibited the highest Importance Value Index (IVI) across all sites. Diversity indices revealed significantly greater richness (Margalef's R = 4.42), evenness (E = 0.78), and Shannon diversity (H̄ = 2.22) in MSFCS, while dominance (CD) and beta diversity (βd) were more pronounced in PSFOS. Correlation analysis demonstrated that disturbance linked to human proximity, grazing, and Non-Timber Forest Products collection negatively affected tree density and diversity. The study highlights the importance of managing anthropogenic pressures to sustain forest biodiversity.</div></div>","PeriodicalId":100960,"journal":{"name":"Next Sustainability","volume":"6 ","pages":"Article 100216"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145578891","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}
Next SustainabilityPub Date : 2025-01-01Epub Date: 2024-09-09DOI: 10.1016/j.nxsust.2024.100073
Diptarka Roy , Anil Kumar Yadav , Surya Pratap Goutam
{"title":"Green synthesized TiO2 nanoparticles as a stimulator for aquaculture growth of Oryza sativa L.","authors":"Diptarka Roy , Anil Kumar Yadav , Surya Pratap Goutam","doi":"10.1016/j.nxsust.2024.100073","DOIUrl":"10.1016/j.nxsust.2024.100073","url":null,"abstract":"<div><p>Depleting agricultural land and water resources with growing human civilization demands an alternative way for faster and more sustainable crop production techniques to meet the current requirements. Recently, nanotechnology-aided hydroponic agriculture (aquaculture) systems have brought remarkable attention. In this context, the present investigation focuses on applying green synthesized TiO<sub>2</sub> nanoparticles in soil-free aquaculture systems to stimulate the germination and growth of <em>Oryza sativa</em> L. TiO<sub>2</sub> nanoparticles are synthesized using <em>Dillenia indica</em> fruit extract and characterized using various spectroscopic and microscopic techniques. X-ray diffraction pattern (XRD) confirms the anatase phase of the synthesized TiO<sub>2</sub> nanoparticles with an average crystallite size of 6.34 nm. Field emission scanning electron microscopy (FESEM) images exhibit spherical morphology, and high-resolution transmission electron microscopy (HRTEM) analysis indicates the most nanoparticles of sizes below 10 nm. The BET surface analysis indicates the mesoporous nature of synthesized nanoparticles, and their pore sizes are distributed between 1 and 10 nm as confirmed by BJH analysis, which is very similar to the result obtained from HRTEM images. Green synthesized TiO<sub>2</sub> nanoparticles in Hoagland nutrient solution enhance germination and growth of <em>Oryza sativa</em> L. via soil-free aquaculture relative to previously commercially produced TiO<sub>2</sub> nanoparticles and other metal oxide nanoparticles. Among different concentrations of synthesized TiO<sub>2</sub> nanoparticles, a particular concentration (10 mg/L) in the nutrient solution efficiently stimulates germination and growth for <em>Oryza sativa</em> L., relative to the control system. TiO<sub>2</sub> nanoparticles with a higher specific surface area adsorb nutrients and facilitate nutrient translocation with improved water uptake inside plants, thus stimulating plant growth and increasing fresh and dry biomass.</p></div>","PeriodicalId":100960,"journal":{"name":"Next Sustainability","volume":"5 ","pages":"Article 100073"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949823624000503/pdfft?md5=7bab199a9b5763600fd5b07e1f334059&pid=1-s2.0-S2949823624000503-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142164402","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}
Next SustainabilityPub Date : 2025-01-01Epub Date: 2025-03-26DOI: 10.1016/j.nxsust.2025.100126
Jayant I. Gowda , Rohini M. Hanabaratti , Yuvarajgouda N. Patil , Pandurang D. Pol , Manjunath B. Megalamani , Sharanappa T. Nandibewoor , Adiveppa B. Vantamuri
{"title":"Halonanoclay-carbon paste composite sustainable electrode for electrochemical oxidation and determination of tryptophan","authors":"Jayant I. Gowda , Rohini M. Hanabaratti , Yuvarajgouda N. Patil , Pandurang D. Pol , Manjunath B. Megalamani , Sharanappa T. Nandibewoor , Adiveppa B. Vantamuri","doi":"10.1016/j.nxsust.2025.100126","DOIUrl":"10.1016/j.nxsust.2025.100126","url":null,"abstract":"<div><div>This research aims to develop a sensitive electrochemical technique for detecting and quantifying Tryptophan (TRP), an amino acid, using a carbon paste electrode modified with halonanoclay. The morphology of the prepared electrode was characterized using XRD and SEM techniques. Tryptophan electro-oxidation was investigated primarily using cyclic voltammetry (CV). Systematic studies were conducted to explore the influence of various parameters, such as scan rate, pH, pre-concentration time, modifier quantity, and analyte concentration, on the peak current response of TRP. Tryptophan exhibited an irreversible, well-defined oxidation peak at 0.820 V. Cyclic voltammetry was used to evaluate the effect of scan rate, allowing for the determination of physicochemical parameters, including the heterogeneous rate constant (k⁰) and the number of electrons (n) involved in the electrochemical reaction. Additionally, differential pulse voltammetry was employed to quantitatively analyze pharmaceuticals and human biological fluids. Linearity in detection was observed between 2.0 × 10<sup>-6</sup> M and 50.0 × 10⁻⁶ M, with a limit of detection of 7.77 × 10<sup>–9</sup> M. As a result, the current electrocatalytic method provides a quick, accurate, and simple method to detect TRP in biological medium and pharmaceutical formulations. A sensor with excellent reproducibility, short response times, and outstanding stability has been described as the modified electrode.</div></div>","PeriodicalId":100960,"journal":{"name":"Next Sustainability","volume":"6 ","pages":"Article 100126"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704191","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}