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da Rocha RFP, da Costa MPM, da Costa ACA, de Mello Ferreira IL. Study of the degradation in an ultisol of alginate-chitosan complex and its stability and applicability as a soil conditioner. Int J Biol Macromol 2024; 264:130384. [PMID: 38395282 DOI: 10.1016/j.ijbiomac.2024.130384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 02/02/2024] [Accepted: 02/20/2024] [Indexed: 02/25/2024]
Abstract
The present work describes the process of degradation of a polyelectrolytic complex (PEC) based on sodium alginate (ALG) and chitosan (CHI), buried for different time intervals, in a clayey soil (ultisol) collected from the municipality of Campos dos Goytacazes, in the northern region of the state of Rio de Janeiro, Brazil. The influence of PEC on soil moisture was also investigated. The results showed that soil moisture increased with the presence of PEC after 7 days of testing, and remained high until the end of the study. FTIR and Raman spectra showed that the breaking of the glycosidic bond (C-O-C) was responsible for the PEC degradation. Thermogravimetry results revealed that alginate was possibly degraded faster than chitosan. Microscopic analysis of the PEC revealed a fragile and fragmented surface of the samples that were buried, in comparison with those not buried. The microbiological assays of the soil confirmed the biodegradation of the polysaccharides. Chemical analysis of soil indicated that PEC did not significantly influence soil fertility. Therefore, we conclude that the PEC (ALG: CHI), formed only by electrostatic interaction, buried in clayey soil, even being biodegraded, can be a promising soil conditioner for agricultural applications.
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Papamichael I, Voukkali I, Economou F, Loizia P, Demetriou G, Esposito M, Naddeo V, Liscio MC, Sospiro P, Zorpas AA. Mobilisation of textile waste to recover high added value products and energy for the transition to circular economy. ENVIRONMENTAL RESEARCH 2024; 242:117716. [PMID: 37995999 DOI: 10.1016/j.envres.2023.117716] [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: 10/18/2023] [Revised: 11/09/2023] [Accepted: 11/15/2023] [Indexed: 11/25/2023]
Abstract
The textile industry is a major contributor to global waste, with millions of tons of textiles being discarded annually. Material and energy recovery within circular economy offer sustainable solutions to this problem by extending the life cycle of textiles through repurposing, recycling, and upcycling. These initiatives not only reduce waste but also contribute to the reduction of the demand for virgin materials (i.e. cotton, wool), ultimately benefiting the environment and society. The circular economy approach, which aims to recreate environmental, economic, and societal value, is based on three key principles: waste reduction, material circulation, and ecological restoration. Given these difficulties, circularity incorporates the material recovery approach, which is focused on the conversion of waste into secondary raw resources. The goal of this notion is to extract more value from resources by prolonging final disposal as long as feasible. When a textile has outlived its functional life, material recovery is critical for returning the included materials or energy into the manufacturing cycle. The aim of this paper is to examine the material and energy recovery options of main raw materials used in the fashion industry while highlighting the need of close observation of the relation between circularity and material recovery, including the investigation of barriers to the transition towards a truly circular fashion industry. The final results refer to the main barriers of circular economy transition within the industry and a framework is proposed. These insights are useful for academia, engineers, policy makers and other key stakeholders for the clear understanding of the industry from within and highlight beyond circular economy targets, SDGs interactions with energy and material recovery of textile waste (SDG 7, SDG 11, SDG 12 etc.).
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Affiliation(s)
- Iliana Papamichael
- Laboratory of Chemical Engineering and Engineering Sustainability, Faculty of Pure and Applied Sciences, Open University of Cyprus. Giannou Kranidioti 89, Latsia, Nicosia, 2231, Cyprus.
| | - Irene Voukkali
- Laboratory of Chemical Engineering and Engineering Sustainability, Faculty of Pure and Applied Sciences, Open University of Cyprus. Giannou Kranidioti 89, Latsia, Nicosia, 2231, Cyprus.
| | - Florentios Economou
- Laboratory of Chemical Engineering and Engineering Sustainability, Faculty of Pure and Applied Sciences, Open University of Cyprus. Giannou Kranidioti 89, Latsia, Nicosia, 2231, Cyprus.
| | - Pantelitsa Loizia
- Laboratory of Chemical Engineering and Engineering Sustainability, Faculty of Pure and Applied Sciences, Open University of Cyprus. Giannou Kranidioti 89, Latsia, Nicosia, 2231, Cyprus
| | - Giorgos Demetriou
- École des Ponts Business School, Circular Economy Research Center, 6 Place du Colonel Bourgoin, 75012, Paris, France.
| | - Mark Esposito
- Hult International Business School, 1 Education St, Cambridge, MA, 02141, United States; Harvard University. Division of Continuing Education 51, Brattle Street Cambridge, MA, 02138, United States.
| | - Vincenzo Naddeo
- Sanitary Environmental Engineering Division, Department of Civil Engineering, University of Salerno, via Giovanni Paolo II, 84084, Fisciano, SA, Italy.
| | - Marco Ciro Liscio
- Dipartimento di Ingegneria dell'Informazione, Università Politecnica delle Marche, Ancona, Marche, 60131, Italy.
| | - Paolo Sospiro
- Dipartimento di Ingegneria dell'Informazione, Università Politecnica delle Marche, Ancona, Marche, 60131, Italy; EUAbout, Bruxelles, Bruxelles, 1000, Belgium.
| | - Antonis A Zorpas
- Laboratory of Chemical Engineering and Engineering Sustainability, Faculty of Pure and Applied Sciences, Open University of Cyprus. Giannou Kranidioti 89, Latsia, Nicosia, 2231, Cyprus.
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Theyagarajan K, Kim YJ. Recent Developments in the Design and Fabrication of Electrochemical Biosensors Using Functional Materials and Molecules. BIOSENSORS 2023; 13:bios13040424. [PMID: 37185499 PMCID: PMC10135976 DOI: 10.3390/bios13040424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 03/21/2023] [Accepted: 03/24/2023] [Indexed: 05/17/2023]
Abstract
Electrochemical biosensors are superior technologies that are used to detect or sense biologically and environmentally significant analytes in a laboratory environment, or even in the form of portable handheld or wearable electronics. Recently, imprinted and implantable biosensors are emerging as point-of-care devices, which monitor the target analytes in a continuous environment and alert the intended users to anomalies. The stability and performance of the developed biosensor depend on the nature and properties of the electrode material or the platform on which the biosensor is constructed. Therefore, the biosensor platform plays an integral role in the effectiveness of the developed biosensor. Enormous effort has been dedicated to the rational design of the electrode material and to fabrication strategies for improving the performance of developed biosensors. Every year, in the search for multifarious electrode materials, thousands of new biosensor platforms are reported. Moreover, in order to construct an effectual biosensor, the researcher should familiarize themself with the sensible strategies behind electrode fabrication. Thus, we intend to shed light on various strategies and methodologies utilized in the design and fabrication of electrochemical biosensors that facilitate sensitive and selective detection of significant analytes. Furthermore, this review highlights the advantages of various electrode materials and the correlation between immobilized biomolecules and modified surfaces.
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Affiliation(s)
- K Theyagarajan
- Department of Electronic Engineering, Gachon University, Seongnam 13120, Republic of Korea
| | - Young-Joon Kim
- Department of Electronic Engineering, Gachon University, Seongnam 13120, Republic of Korea
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Mijas G, Josa M, Cayuela D, Riba-Moliner M. Study of Dyeing Process of Hemp/Cotton Fabrics by Using Natural Dyes Obtained from Rubia tinctorum L. and Calendula officialis. Polymers (Basel) 2022; 14:polym14214508. [PMID: 36365502 PMCID: PMC9654363 DOI: 10.3390/polym14214508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 10/17/2022] [Accepted: 10/20/2022] [Indexed: 11/26/2022] Open
Abstract
The objective of this work was to assess the possibility of dyeing a substrate composed of non-textile industrial hemp using natural dyes from common madder (Rubia Tinctorum L.) and calendula (Calendula Officialis) and tannin and alum as mordants. The substrate used for the dyeing had a 25/75 hemp/cotton composition. The hemp raw material is an agricultural by-product that was subjected to mechanical and chemical treatments in order to cottonize the fibers, blend them with cotton, and thus obtain first 40-tex open-end yarns and then a knitted fabric. The latter was subjected to different dyeing conditions by varying the dye, mordant, and method for its application, type of water, and rinsing after dyeing. Measurements of the difference (ΔE) and intensity (K/S) of color and fastness to washing and rubbing were carried out. The results showed that dyeing of a non-textile residual hemp substrate is possible, and that calendula is a good option for dyeing it with tap water, tannin-alum set in a meta-mordanting process, and rinsing after 24 h. In this way, a contribution has been made to the circular economy of the textile industry through the use of more sustainable sources and products.
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Affiliation(s)
- Gabriela Mijas
- Terrassa Institute of Textile Research and Industrial Cooperation (INTEXTER), Universitat Politècnica de Catalunya (UPC), 08222 Terrassa, Spain
| | - Mariona Josa
- Terrassa Institute of Textile Research and Industrial Cooperation (INTEXTER), Universitat Politècnica de Catalunya (UPC), 08222 Terrassa, Spain
| | - Diana Cayuela
- Terrassa Institute of Textile Research and Industrial Cooperation (INTEXTER), Universitat Politècnica de Catalunya (UPC), 08222 Terrassa, Spain
- Department of Materials Science and Engineering (CEM), Universitat Politècnica de Catalunya (UPC-ESEIAAT), 08222 Terrassa, Spain
| | - Marta Riba-Moliner
- Terrassa Institute of Textile Research and Industrial Cooperation (INTEXTER), Universitat Politècnica de Catalunya (UPC), 08222 Terrassa, Spain
- Department of Materials Science and Engineering (CEM), Universitat Politècnica de Catalunya (UPC-ESEIAAT), 08222 Terrassa, Spain
- Correspondence:
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