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Li J, Huang R, Chen Z, Sun X, Yu D. Utilization Potential of Aerated Concrete Block Powder and Coffee Grounds Ash in Green-Growing Concrete. MATERIALS (BASEL, SWITZERLAND) 2024; 17:3027. [PMID: 38930395 PMCID: PMC11205659 DOI: 10.3390/ma17123027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2024] [Revised: 05/27/2024] [Accepted: 05/31/2024] [Indexed: 06/28/2024]
Abstract
The purpose of this research is to investigate the utilization potential of recycled powder made from spent coffee grounds (SCGs) and aerated concrete blocks (ACBs) in green-growing concrete. The green-growing concrete is prepared using ACB powder and SCG ash as raw materials instead of 5%, 15%, and 25% and 5%, 10%, and 15% cement, respectively. Then, the two raw materials are compounded with the optimal content. The compressive strength and alkalinity of green-growing concrete at 7d and 28d and the frost resistance after 25 freeze-thaw cycles at 28d are studied. The results showed that the optimum content of ACB powder and SCG ash was 5%. Replacing 5% cement with recycled powder could improve the strength of concrete. The alkalinity of concrete containing ACB powder gradually increased, while the alkalinity of concrete containing SCG ash gradually decreased. The alkalinity of ACB-SCG powder was lower than that of ACB powder but slightly higher than that of SCG ash. The frost resistance of concrete containing ACB powder decreased gradually, and the frost resistance of concrete containing SCG ash increased first and then decreased greatly. The frost resistance of ACB-SCG powder could neutralize that of ACB powder and SCG ash.
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Affiliation(s)
- Jinping Li
- College of Materials Science and Engineering, Xi’an University of Architecture and Technology, Xi’an 710100, China; (J.L.); (X.S.); (D.Y.)
| | - Rong Huang
- Shaanxi Construction Engineering Fifth Construction Group Co., Ltd., Xi’an 710100, China;
| | - Zheng Chen
- College of Materials Science and Engineering, Xi’an University of Architecture and Technology, Xi’an 710100, China; (J.L.); (X.S.); (D.Y.)
| | - Xuedi Sun
- College of Materials Science and Engineering, Xi’an University of Architecture and Technology, Xi’an 710100, China; (J.L.); (X.S.); (D.Y.)
| | - Deliang Yu
- College of Materials Science and Engineering, Xi’an University of Architecture and Technology, Xi’an 710100, China; (J.L.); (X.S.); (D.Y.)
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Le DL, Salomone R, Nguyen QT. Sustainability assessment methods for circular bio-based building materials: A literature review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 352:120137. [PMID: 38266527 DOI: 10.1016/j.jenvman.2024.120137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 12/11/2023] [Accepted: 01/17/2024] [Indexed: 01/26/2024]
Abstract
Using circular bio-based building materials is considered a promising solution to reduce the environmental impacts of the construction industry. To identify the pros and cons of these materials, it is essential to investigate their sustainability performance. However, the previous sustainability assessment studies are heterogeneous regarding the assessment methods and objectives, highlighting the need for a review to identify and analyse these aspects. Moreover, there is still a lack of studies reviewing the methodological issues and implications of the assessment methods, as well as the current end-of-life scenarios and circularity options for these materials. To address these gaps, this study conducts a systematic and critical review of a sample of 97 articles. The results indicate that Life Cycle Assessment (LCA) is the most frequently applied method, yet most studies are cradle-to-gate analyses of materials. Otherwise, very few studies consider the end-of-life phase, and most of the end-of-life scenarios analysed are unsustainable and have low circularity levels. The analysis also highlights the methodological issues of the assessment methods used, with a particular focus on LCA, such as a lack of consensus on system boundaries, functional units, and databases for facilitating sustainability assessments associated with the use of circular bio-based building materials. Two primary recommendations emerge from the analysis. Firstly, for LCA studies, it is recommended to increase transparency and harmonisation in assessments to improve the comparability of results. Besides, to overcome data availability issues, it is recommended to use data from multiple sources and conduct sensitivity and uncertainty analyses. Secondly, more sustainability assessments (including the three pillars) considering the whole life cycle with more sustainable end-of-life scenarios and circularity options for these materials should be conducted.
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Affiliation(s)
- Dinh Linh Le
- University School for Advanced Studies IUSS Pavia, Piazza Della Vittoria 15, Pavia, 27100, Italy; Department of Economics, University of Messina, Piazza Pugliatti 1, Messina, 98122, Italy; Faculty of Construction Economics and Management, Hanoi University of Civil Engineering, 55 Giai Phong, Hai Ba Trung District, Hanoi, Viet Nam.
| | - Roberta Salomone
- Department of Economics, University of Messina, Piazza Pugliatti 1, Messina, 98122, Italy.
| | - Quan T Nguyen
- Faculty of Construction Economics and Management, Hanoi University of Civil Engineering, 55 Giai Phong, Hai Ba Trung District, Hanoi, Viet Nam.
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Valencia Isaza A, Mejía Arcila J, Restrepo J, Valencia García M, Peña LW. Performance and applications of lightweight geopolymer and alkali activated composites with incorporation of ceramic, polymeric and lignocellulosic wastes as aggregates: A review. Heliyon 2023; 9:e20044. [PMID: 37767512 PMCID: PMC10520330 DOI: 10.1016/j.heliyon.2023.e20044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Revised: 09/07/2023] [Accepted: 09/08/2023] [Indexed: 09/29/2023] Open
Abstract
As the construction industry moves towards greater sustainability, the application of more durable and environmentally friendly materials, capable of providing comfort in buildings and infrastructure, is a key element to consider. In this context, the use of alkali-activated binders (AAB) and geopolymers (GP), which have a lower carbon footprint than ordinary Portland cement (OPC), has emerged as an important alternative. Moreover, the addition of waste-based lightweight aggregates (LWA) to AAB and GP matrices produces lightweight composites that offer enhanced mechanical performance and improved comfort as building materials, while offering an alternative use to the increasing number of waste materials from diverse sources. This paper presents a comprehensive review of the literature on the above-mentioned topics (waste LWA in an AAB/GP matrix) published between 2012 and 2023, mainly indexed in the Scopus database. The waste-based LWA reported in the literature were categorized, and their properties and morphology presented. Then, the influence of the size, quantity, and nature of the LWA on the composite's properties and performance was analyzed. Fresh state performance, mechanical performance, density, and thermal and acoustic insulation were considered. This review is complemented by a bibliometric analysis, where keyword correlation and co-authorship networks on this field are established. The review highlights the potential of cementitious composites including waste-based LWA as a sustainable building material for structural and non-structural applications. However, more studies are required to further understand the behaviour of these composites under innovative manufacturing processes, such as extrusion and 3D printing.
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Affiliation(s)
- A. Valencia Isaza
- Grupo de Investigación en Materiales Alternativos y Procesos Automáticos (MAPA), Universidad EIA, Colombia
| | - J.M. Mejía Arcila
- Grupo de Investigación en Materiales Alternativos y Procesos Automáticos (MAPA), Universidad EIA, Colombia
| | - J.W. Restrepo
- Grupo de Investigación en Materiales Alternativos y Procesos Automáticos (MAPA), Universidad EIA, Colombia
| | - M.F. Valencia García
- Grupo de Investigación en Materiales Alternativos y Procesos Automáticos (MAPA), Universidad EIA, Colombia
| | - L.V. Wilches Peña
- Grupo de Investigación en Materiales Alternativos y Procesos Automáticos (MAPA), Universidad EIA, Colombia
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Gebreeyessus GD. Towards the sustainable and circular bioeconomy: Insights on spent coffee grounds valorization. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 833:155113. [PMID: 35427619 DOI: 10.1016/j.scitotenv.2022.155113] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2022] [Revised: 04/04/2022] [Accepted: 04/04/2022] [Indexed: 06/14/2023]
Abstract
Discovered in Ethiopia, coffee became a popular beverage in Asia, Europe, Latin America, Australia, Africa and the North America as a drink after water and the largest goods after petroleum. However, the coffee industry generates a huge biomass as its byproducts of which the spent coffee grounds (SCG) is concerning, especially in the production chain away from the farm. Therefore, the valorization and revalorization of the SCG has a huge impact on the socioeconomic and environmental sustainability of the industry, up to the realization of the circular bioeconomy. With the advancing biorefinery concept, even an almost complete recovery of the SCG is reported at an experimental level. Such kind of studies increased with time following the action of the Sustainable Development Goals by the United Nations Development Program promulgated in 2015. The current review highlights on the background, socioeconomic, environmental contexts of coffee production and the SCG valorization and revalorization studies. Refereeing to 154 screened articles published in over 30 years' time, the SCG revalorization efforts and its integrated biorefinery as a green management approach are uniquely addressed. Plenty of studies have reported the production of bio-products from the SCG, such as the derivation of adsorbents, biochar, bioethanol, biogas, biodiesel, bio-oil, compost, construction material aggregates, cosmetics, electricity and food ingredients. In conclusion, the recovery potential of the SCG is promising and can substantially contribute to a sustainable and green bioeconomy. Nevertheless, the recovery of bioactive materials through SCG fermentation is still lacking. Most studies are conducted on a lab scale, which needs to be piloted and commissioned. Furthermore, the link between climate change and variability vis-à-vis the sustainable management of the SCG remains unaddressed.
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Affiliation(s)
- Getachew Dagnew Gebreeyessus
- Department of Urban Environmental Management, Kotebe University of Education, P.O. Box 31248, Addis Ababa, Ethiopia; Africa Center of Excellence for Water Management at Addis Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia.
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Valorization of Spent Coffee Grounds as a Natural Source of Bioactive Compounds for Several Industrial Applications-A Volatilomic Approach. Foods 2022; 11:foods11121731. [PMID: 35741929 PMCID: PMC9222233 DOI: 10.3390/foods11121731] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 06/06/2022] [Accepted: 06/09/2022] [Indexed: 01/25/2023] Open
Abstract
Coffee is one of the most popular beverages worldwide, whose production and consumption result in large amounts of waste, namely spent coffee grounds, constituting an important source of compounds for several industrial applications. This work focused on the establishment of the volatile fingerprint of five spent coffee grounds from different geographical origins using headspace solid-phase microextraction coupled with gas chromatography-mass spectrometry (HS-SPME/GC-MS), as a strategy to identify volatile organic metabolites (VOMs) with potential application in the food industry as antioxidant, anti-inflammatory, and antiproliferative agents. One hundred eleven VOMs belonging to different chemical families were identified, of which 60 were found in all spent coffee grounds analyzed. Furanic compounds (34%), nitrogen compounds (30%), and esters (19%) contributed significant to the total volatile fingerprint. The data obtained suggest that spent coffee grounds have great potential to be used as raw material for different approaches in the food industry towards the development of new food ingredients or products for human consumption, in addition to pharmaceutical and cosmetic applications, namely as antioxidant (e.g., limonene, carvacrol), antimicrobial (e.g., pyrrole-2-carboxaldehyde, β-myrcene) and anti-inflammatory (e.g., furfural, 2-furanmethanol) agents, promoting their integral valorization within the circular bioeconomy concept.
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Fabrication of Biochar Materials from Biowaste Coffee Grounds and Assessment of Its Adsorbent Efficiency for Remediation of Water-Soluble Pharmaceuticals. SUSTAINABILITY 2022. [DOI: 10.3390/su14052931] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Biowaste coffee grounds have been recognized as an effective and relatively low-cost adsorbent to complement conventional treatment techniques for removing emerging contaminants (ECs) from the waste stream through modification to useful biochar. The purpose of this study was to make biochar from biowaste coffee grounds through the pyrolysis process and investigate its potential capacity for the removal of pharmaceuticals from water. The biochar was prepared by pyrolysis process under argon gas conditions, and its adsorption capacity for pharmaceuticals was evaluated. The as-prepared biochar shows a surface area of 232 m2 g−1. The adsorption of salicylic acid, diclofenac, and caffeine onto the biochar show adsorption capacities of 40.47 mg g−1, 38.52 mg g−1, and 75.46 mg g−1, respectively. The morphology, functional groups, crystallinity, and specific surface area were determined by SEM, FTIR, XRD, and BET techniques, respectively. Kinetic results reveal that the experimental data fit the pseudo-second-order model and the Temkin isotherm model. In conclusion, these results illustrate the potential of biochar produced from biowaste coffee grounds could play an important role in environmental pollution mitigation by enhancing removal of pharmaceuticals from conventional wastewater treatment effluent, thereby minimizing their potential risks in the environment.
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