{"title":"Performance and microstructural characterization of sustainable self-compacting geopolymer concrete with multi-component binders","authors":"Naresh Thatikonda , Mainak Mallik , S Venkateswara Rao , Saurabh Dubey","doi":"10.1016/j.scp.2025.101926","DOIUrl":"10.1016/j.scp.2025.101926","url":null,"abstract":"<div><div>The extensive use of Ordinary Portland Cement (OPC) in construction contributes significantly to global CO₂ emissions, necessitating sustainable alternatives. This study explores the potential of Self-Compacting Geopolymer Concrete (SCGC) as a green substitute. SCGC formulations incorporate Fly Ash (FA), Ground Granulated Blast Furnace Slag (GGBFS), Rice Husk Ash (RHA), and Micro Silica (MS) as binders, tested with solution-to-binder ratios of 0.5, 0.55, and 0.6. MS partially replaces RHA at 0%, 5%, 10%, and 15%, with fresh and hardened properties evaluated via workability, compressive strength, tensile strength, and flexural strength. Durability was assessed through porosity, sorptivity, Rapid Chloride Permeability (RCPT), and Accelerated Carbonation (ACPT), complemented by Scanning Electron Microscopy (SEM), Fourier-Transform Infrared Spectroscopy (FTIR), Energy Dispersive X-ray (EDX), and X-ray Diffraction (XRD) microstructural analyses. Results showed optimal performance at 15% MS, yielding a compressive strength of 62 MPa and a denser geopolymer matrix. Key phases identified include C/N-A-S-H, mullite, and calcium aluminate silicates, enhancing strength and durability. This research highlights SCGC as a viable, high-performance, and sustainable alternative to conventional concrete, supporting green infrastructure and reducing the environmental impact of the construction industry.</div></div>","PeriodicalId":22138,"journal":{"name":"Sustainable Chemistry and Pharmacy","volume":"44 ","pages":"Article 101926"},"PeriodicalIF":5.5,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143272236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Sustainable Pharmacy‒a guiding principle","authors":"Karina Witte, Michael Müller","doi":"10.1016/j.scp.2024.101897","DOIUrl":"10.1016/j.scp.2024.101897","url":null,"abstract":"<div><div>All of us, as individuals and society, are responsible for ensuring that the needs of current and future generations are fully met. In the field of pharmaceuticals, however, due to system constraints, mostly individuals of the current generation benefit from progress. Within a Sustainable Pharmacy framework, the fundamental medical and pharmaceutical philosophy of “first, do no harm” and the prevention of illnesses and possibility of disease treatment of current and future generations should be addressed. The concept of Sustainable Pharmacy developed here integrates sustainable development into pharmaceutical sciences and provides a work-in-progress definition. It requires a strict distinction from (primarily) ecologically oriented approaches such as Green Pharmacy to reduce the risk of (un)intentional greenwashing, moral licensing, and misunderstandings. Sustainable Pharmacy focuses on the connection and interaction of the development, treatment, and perception of disease with the underlying causes that are embedded in social systems in which people live. Systems thinking is required to address the complexity of health, disease, sustainability, and pharmacy. We propose education, environment, society, economy, pharmacology, and culture as key areas to be integrated in terms of wholes (from a systems perspective), and call for increased communication about the values and ethics that underpin pharmacy and healthcare systems. To move towards enabling the opportunities for disease treatment for present and future generations through effective prevention and medical and non-medical treatment of diseases, high-leverage actions that address the underlying causes of diseases and barriers to health services are needed. With this paper, we provide a basis for further development of the concept of Sustainable Pharmacy at (inter)national, (inter)disciplinary, and (trans)disciplinary levels.</div></div>","PeriodicalId":22138,"journal":{"name":"Sustainable Chemistry and Pharmacy","volume":"44 ","pages":"Article 101897"},"PeriodicalIF":5.5,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143173954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Oxalic acid optimization for iron-based solid waste conversion into a carbon-sequestering composite building material","authors":"Niveditha M, T. Palanisamy","doi":"10.1016/j.scp.2024.101875","DOIUrl":"10.1016/j.scp.2024.101875","url":null,"abstract":"<div><div>The cement industry significantly contributes to global CO<sub>2</sub> emissions, accounting for approximately 164 million metric tonnes annually, while total emissions from all sources reach 37 billion metric tonnes. Concurrently, the iron and steel sector generates substantial waste, producing about 500 kg of waste per tonne of steel. Addressing these environmental challenges is crucial for sustainable development. This study presents a sustainable alternative to traditional cement by developing a novel binder material composed primarily of waste iron. The alternative binder not only avoids CO<sub>2</sub> emissions but also absorbs CO<sub>2</sub> during carbonation curing, effectively contributing to carbon sequestration. Key parameters, including particle size, oxalic acid dosage, and water-to-binder ratio, were individually tested and analyzed for their impact on compressive strength, leading to the finalization of a 75μm particle size and a 0.2 water-to-binder ratio, which yielded compressive strengths of up to 45 MPa. The wet mix method for oxalic acid incorporation demonstrated superior performance compared to the dry mix approach. Comprehensive analyses, including XRD, FTIR, TGA/DTG, and FESEM, confirmed the enhanced reactivity and performance of the material with finer particles and optimized oxalic acid dosage. By utilizing 80% of waste materials, this alternative binder addresses both waste management and carbon capture, aligning with global sustainability objectives and advancing the development of eco-friendly building materials.</div></div>","PeriodicalId":22138,"journal":{"name":"Sustainable Chemistry and Pharmacy","volume":"43 ","pages":"Article 101875"},"PeriodicalIF":5.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143144957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Huijie Huang , Changbo Du , Fu Yi , Dingshi Chen , Chengwei Zhang
{"title":"Microstructural and mechanical evolution of recycled fiber-reinforced tunnel slag concrete under wet-dry cycles","authors":"Huijie Huang , Changbo Du , Fu Yi , Dingshi Chen , Chengwei Zhang","doi":"10.1016/j.scp.2025.101905","DOIUrl":"10.1016/j.scp.2025.101905","url":null,"abstract":"<div><div>The rapid expansion of tunnel construction has generated large amounts of tunnel slag and waste geotechnical fibers (GF), posing challenges to environmental sustainability and resource efficiency. The effective reuse and recycling of these materials have become pivotal in current research. Notably, the fluctuating conditions of wet-dry cycles present critical challenges to structural durability and safety. To address this challenge, this work developed an innovative geotechnical fiber-reinforced slag concrete (GFSC) using recycled tunnel slag and waste GF. The compressive strength, split tensile strength, and axial compressive strength of this novel concrete were evaluated under dry-wet cycling, and their microstructural evolutions were thoroughly analyzed using MIP, SEM, and XRD techniques. The results reveal that incorporating 0.9 kg/m<sup>3</sup> GF improves the densification of GFSC, reduces porosity, and significantly enhances both compressive and tensile strengths; after 45 wet-dry cycles, the optimal GF dosage effectively bonds with the cement matrix, forming a dense interfacial transition zone that boosts structural stability and resistance to variable environments. These findings provide insights into extending infrastructure lifespan and safety under harsh conditions while promoting sustainability through recycled materials in engineering.</div></div>","PeriodicalId":22138,"journal":{"name":"Sustainable Chemistry and Pharmacy","volume":"43 ","pages":"Article 101905"},"PeriodicalIF":5.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143145529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design, development and performance evaluation of mobile street cleaner (mSC) for municipal solid waste litter management","authors":"Deval Singh , Anil Kumar Dikshit , Sunil Kumar","doi":"10.1016/j.scp.2024.101889","DOIUrl":"10.1016/j.scp.2024.101889","url":null,"abstract":"<div><div>Rapid urbanization and population growth have led to a significant rise in municipal solid waste litter (MSWL) generation. The traditional manual collection process are labour-intensive, time-consuming, and often inadequate for addressing the growing volume of MSWL in cities. Advanced vacuum suction devices (VSDs) have emerged as an effective solution for indoor litter collection. However, limited studies has been reported to understand the feasibility of these devices for outdoor applications. Therefore, this study proposes a mobile street cleaner (mSC), a VSD specifically designed and engineered for MSWL collection from diverse urban settings. The study highlights the design methodology and model assumptions for developing a mechanical suction unit (MSU) for the mSC, demonstrating a 70% performance efficacy at 5000 m³/h (S<sub>1</sub>) suction flow rate. Batch-scale experimental simulations with varying hose pipe diameter (D) (0.3–0.15 m), suction flow rate (S) (2500–5000 m<sup>3</sup>/h) and litter characteristic was conducted to optimize mSC. At S<sub>1</sub>, the nozzle inlet velocity of 23–40 m/s was found to be more effective in collecting larger and heavier litter particles compared to S<sub>2</sub>. Therefore, the hose pipe diameter of 0.25 (D<sub>2</sub>) and 0.20 m (D<sub>3</sub>) at S<sub>1</sub> was found to be most efficient and less time consuming in MSWL collection. Finally, the study highlights the potential benefits of proposed mSC in automating collection process, reducing operational costs, improving source segregation and recycling opportunities. The findings of this study offer valuable insights for technocrats and researchers in enhancing application of VSDs for sustainable urban waste management.</div></div>","PeriodicalId":22138,"journal":{"name":"Sustainable Chemistry and Pharmacy","volume":"43 ","pages":"Article 101889"},"PeriodicalIF":5.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143144437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Utilizing of iron filings in geopolymer mortar as a target for climate change mitigation","authors":"Mohamed Fouad A. Abdu","doi":"10.1016/j.scp.2025.101910","DOIUrl":"10.1016/j.scp.2025.101910","url":null,"abstract":"<div><div>Industrial waste is increasing consistently with increase of various industries, which leads to environmental pollution. Iron filings (IF) are a type of this waste, that results from cutting and grinding of iron. This research aims to recycle iron filings and use them as a partially sand replacement in construction works to protect the environment from pollution and preserve the depletion of sand as a natural resource. The recent studies investigated performance of cement concrete, mortars and pastes containing iron filings. So, this study aims to investigate the effect of partial replacement of sand by iron filings on properties of geopolymer mortars. On the other hand, the using of geopolymer mortars in this study as a green binder aims to prevent the negative effects of the cement industry. In this study, range of IF (10–50 wt %) was introduced as a replacement of sand in five alkali activated slag mortars activated with sodium hydroxide and sodium silicate solutions. One mixture served as a control without any IF. Different mortar properties such as setting time, flowability, compressive strength, flexural strength, porosity and abrasion resistance were investigated. The results indicated the setting time and flowability decreased as the ratio of IF replacement increased. However, ratio of 10 % IF replacement showed higher values of 38 MPa and 6.2 MPa for compressive and flexural strengths, respectively, and lower values for water absorption and porosity. Introduction IF replacement ratio of (10–30 %) showed enhancement in abrasion resistance, whilst introduction of (40–50 %) showed adverse effect.</div></div>","PeriodicalId":22138,"journal":{"name":"Sustainable Chemistry and Pharmacy","volume":"43 ","pages":"Article 101910"},"PeriodicalIF":5.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143145000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Juan Cubero-Cardoso , Manuel Hernández-Escaño , Ángeles Trujillo-Reyes , Fernando G. Fermoso , Ma Ángeles Fernández-Recamales , Juan Fernández-Bolaños , Guillermo Rodríguez-Gutiérrez , Juan Urbano
{"title":"Mechanochemical-assisted Natural Deep Eutectic Solvent as a platform for an olive leaves biorefinery: Extraction of bioactive compounds and methane production","authors":"Juan Cubero-Cardoso , Manuel Hernández-Escaño , Ángeles Trujillo-Reyes , Fernando G. Fermoso , Ma Ángeles Fernández-Recamales , Juan Fernández-Bolaños , Guillermo Rodríguez-Gutiérrez , Juan Urbano","doi":"10.1016/j.scp.2024.101879","DOIUrl":"10.1016/j.scp.2024.101879","url":null,"abstract":"<div><div>This study introduces an innovative biorefinery process aimed at maximizing the utilization of olive leaves. The proposed approach seeks to extract valuable phenolic compounds, lignocellulosic material, and biomethane from olive leaves. To achieve this, a combined technique involving mechanochemical extraction and sustainable solvents, specifically natural deep eutectic solvents (NADES), was employed. Unlike conventional methods, NADES were simultaneously formed and utilized for extraction within a ball mill. The optimal conditions for maximum extraction of high-value compounds were 0.5 g of OL using 10 mL of ChCl:Gl (3:1) and 1.1 h in a ball mill. The recovered yields were 14.5 ± 2.9 g/kg OL of lignocellulosic fraction and 1.3 ± 0.3 g gallic acid eq./kg OL of phenolic compounds. OL waste generated after the optimized extraction process was evaluated for methane production, obtaining 142 ± 53 mL CH4/g VS OL waste compared to 126 ± 30 mL CH4/g VS untreated OL. Therefore, NADES represent promising solvents for the biorefinery process and reduce dependence on organic solvents.</div></div>","PeriodicalId":22138,"journal":{"name":"Sustainable Chemistry and Pharmacy","volume":"43 ","pages":"Article 101879"},"PeriodicalIF":5.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143144435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Diego E. Carballo, Sarahi Torres-Hermosillo, Liliana Piñón-Gómez, Johan Mendoza, Blanca Sánchez-Ramírez, Armando Quíntero-Ramos, David Chávez-Flores, Néstor Gutiérrez-Méndez
{"title":"Development of food-grade microemulsions (F‒G μEms) for green extraction of bioactive compounds from Jalapeño waste (Capsicum annum var. Hot)","authors":"Diego E. Carballo, Sarahi Torres-Hermosillo, Liliana Piñón-Gómez, Johan Mendoza, Blanca Sánchez-Ramírez, Armando Quíntero-Ramos, David Chávez-Flores, Néstor Gutiérrez-Méndez","doi":"10.1016/j.scp.2025.101912","DOIUrl":"10.1016/j.scp.2025.101912","url":null,"abstract":"<div><div>Jalapeño peppers, a key crop in Mexico, have a short postharvest life, leading to food waste and loss of bioactive compounds. While conventional solvent extraction is used to recover these compounds, it often relies on toxic, environmentally harmful solvents. In this context, we aimed to formulate a series of eco-friendly food-grade microemulsions (F‒G μEms) and assess the use of these solvent-free systems to extract polyphenols and capsaicinoids from Jalapeño waste. The basic formula of these F‒G μEms included <span>d</span>-limonene, Tween 80, and may have acetic acid (AcLiTw) or not (LiTw). The results showed that the acidic and non-acidic microemulsions were thermodynamically stable after 10.8 ± 0.69 and 13.98 ± 0.21 days at 35 °C, respectively. The use of AcLiTw as a solvent significantly enhanced (<em>p</em> < 0.05) the extraction of total polyphenols, achieving approximately 27% improvement compared to ethanol. The AcLiTw microemulsion extracted substantially higher amounts of vanillic acid and rutin, achieving increases of 0.4-fold and 4.4-fold, respectively, compared to LiTw. AcLiTw was twice as effective (<em>p</em> < 0.05) in extracting vanillin (≈67 mg/kg dw for ethanol extraction and LiTw, compared to 101.72 mg/kg dw for AcLiTw) and was the only formulation capable of extracting catechin from jalapeño waste (183.9 mg/kg dw). Finally, both LiTw and AcLiTw successfully extracted capsaicinoids from Jalapeño peppers (1131.01 and 5977.41 mg/kg dw, respectively), although in lesser amounts than ethanol (17569.02 mg/kg dw).</div></div>","PeriodicalId":22138,"journal":{"name":"Sustainable Chemistry and Pharmacy","volume":"43 ","pages":"Article 101912"},"PeriodicalIF":5.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143144621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sabikeh Azimi , Muna S. Merza , Fatemeh Ghasemi , Hasan Ali Dhahi , Farid Baradarbarjastehbaf , Mehdi Moosavi , Pouya Ghamari Kargar , Christophe Len
{"title":"Retraction notice to “Green and rapid and instrumental one-pot method for the synthesis of imidazolines having potential anti-SARS-CoV-2 main protease activity” [Sustain. Chem. Pharm. 34 (2023) 101136]","authors":"Sabikeh Azimi , Muna S. Merza , Fatemeh Ghasemi , Hasan Ali Dhahi , Farid Baradarbarjastehbaf , Mehdi Moosavi , Pouya Ghamari Kargar , Christophe Len","doi":"10.1016/j.scp.2025.101920","DOIUrl":"10.1016/j.scp.2025.101920","url":null,"abstract":"","PeriodicalId":22138,"journal":{"name":"Sustainable Chemistry and Pharmacy","volume":"44 ","pages":"Article 101920"},"PeriodicalIF":5.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143621308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}