Recycling最新文献_第9页

A Zero-Waste Campus Framework: Perceptions and Practices of University Campus Community in Malaysia 零浪费校园框架:马来西亚大学校园社区的认知与实践

IF 4.3

Recycling Pub Date : 2023-02-06 DOI: 10.3390/recycling8010021

Mayawi Baba-Nalikant, Sharifah Mashita Syed-Mohamad, M. Husin, N. A. Abdullah, Mohamad Saifudin Mohamad Saleh, Asyirah Abdul Rahim

{"title":"A Zero-Waste Campus Framework: Perceptions and Practices of University Campus Community in Malaysia","authors":"Mayawi Baba-Nalikant, Sharifah Mashita Syed-Mohamad, M. Husin, N. A. Abdullah, Mohamad Saifudin Mohamad Saleh, Asyirah Abdul Rahim","doi":"10.3390/recycling8010021","DOIUrl":"https://doi.org/10.3390/recycling8010021","url":null,"abstract":"This paper will explore the university campus community’s perspective towards the realization of a zero-waste campus. A qualitative approach is employed to identify the factors influencing the campus community’s awareness and participation in solid waste management (SWM). Perceptions, attitudes, beliefs, opinions, and ideas of Universiti Sains Malaysia (USM) campus community members are explored in focus group discussions (FGD) to determine the main factors influencing their zero-waste pro-environmental behaviour (PEB). The in-depth interview (IDI) is used to learn more about the university campus community’s perspectives on the themes defined by the FGD. The instruments were developed based on the adaption and adoption of previous studies, especially in reference to Kollmuss and Agyeman’s 2002 Model of Pro-Environmental Behaviour and a modified Knowledge-Attitude-Practices model. The findings show that environmental goals, environmental education, personal waste-related experience, environmental policy, environmental self-awareness, reinforcement contingencies, community engagement, social responsibilities, exemplary leadership, and social media influence the campus community’s zero-waste PEB. A framework based on an adaptation of Kollmuss and Agyeman’s model of pro-environmental behaviour is proposed to promote sustainable pro-environmental behaviour towards a Zero-Waste Campus.","PeriodicalId":36729,"journal":{"name":"Recycling","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2023-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46019813","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}

引用次数: 3

Highlighting the Role of Archaea in Urban Mine Waste Exploitation and Valorisation 突出古菌在城市矿山废弃物开发和估价中的作用

IF 4.3

Recycling Pub Date : 2023-02-04 DOI: 10.3390/recycling8010020

A. Abdel Azim, Ruggero Bellini, Arianna Vizzarro, Ilaria Bassani, C. Pirri, B. Menin

{"title":"Highlighting the Role of Archaea in Urban Mine Waste Exploitation and Valorisation","authors":"A. Abdel Azim, Ruggero Bellini, Arianna Vizzarro, Ilaria Bassani, C. Pirri, B. Menin","doi":"10.3390/recycling8010020","DOIUrl":"https://doi.org/10.3390/recycling8010020","url":null,"abstract":"E-materials become e-waste once they have been discarded without the intent of reuse. Due to its rich content of metals, among which many are Critical Raw Materials (CRMs), e-waste can be considered an urban mine to exploit and valorise. Common metal refining is performed by energy-intensive processes frequently based on the use of fossil fuel. Bio-metallurgy is a promising alternative for e-waste valorisation based on biological routes of specialised microorganisms able to leach solid-containing metals. Because of the physiology of these microorganisms, microbial leaching can be economically feasible, besides being an environmentally sustainable process. Like Bacteria and Fungi, Archaea are also capable of metal leaching activity, though their potential is underestimated. Among them, the extremophiles are the most studied and applied in the field of metal recovery, while mesophilic species are less common but still of high interest. Here we provide the state of industrial application of bio-metallurgy and report on the state of the art of Archaea exploitation in metal recovery from e-waste. Moreover, we give a special highlight to methanogenic archaea, which are able to convert CO2 into methane in order to highlight the potential for the valorisation of CO2-rich industrial streams generated by key processes (i.e., anaerobic digestion, concrete, and steel production) in CH4 for gas grid distribution, while making metals content in e-waste available again as raw material.","PeriodicalId":36729,"journal":{"name":"Recycling","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2023-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46592330","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}

引用次数: 2

Thermal and Sound Insulation Properties of Recycled Expanded Polystyrene Granule and Gypsum Composites 再生发泡聚苯乙烯颗粒与石膏复合材料的隔热隔音性能

IF 4.3

Recycling Pub Date : 2023-02-03 DOI: 10.3390/recycling8010019

G. Bumanis, Pauls P. Argalis, G. Sahmenko, D. Mironovs, S. Ručevskis, A. Korjakins, D. Bajare

{"title":"Thermal and Sound Insulation Properties of Recycled Expanded Polystyrene Granule and Gypsum Composites","authors":"G. Bumanis, Pauls P. Argalis, G. Sahmenko, D. Mironovs, S. Ručevskis, A. Korjakins, D. Bajare","doi":"10.3390/recycling8010019","DOIUrl":"https://doi.org/10.3390/recycling8010019","url":null,"abstract":"Up to now, primary resources have been the main choice of raw material selection for production. Now, global market tendencies have brought significant attention to secondary resources as the price has been raised for primary materials, and there is a shortage of their delivery. This could bring an additional effort to increase the recycling level of construction and demolition waste, including expanded polystyrene (EPS). Efforts have been made to develop new efficient building materials with a high content of recycled EPS. In this paper, composite insulation material made of gypsum hemihydrate and recycled EPS beads by casting and compression methods were evaluated, and properties were compared. Thermal and sound insulation properties were characterized. Density from 48 to 793 kg/m3 was obtained and the thermal conductivity coefficient from 0.039 to 0.246 W/(m·K) was measured. Compression strength was from 18 kPa to 2.5 MPa. Composites produced with the compression method have a sound absorption coefficient α > 0.9 in the range from 600 to 700 Hz, while the samples produced by casting showed poor sound absorption with wide deviation. Compression methods had an advantage over the casting method as more homogenous and lightweight materials were produced with improved insulation properties.","PeriodicalId":36729,"journal":{"name":"Recycling","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2023-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47357375","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}

引用次数: 5

Quality Aspects in the Compounding of Plastic Recyclate 塑料再生胶配方中的质量问题

IF 4.3

Recycling Pub Date : 2023-01-31 DOI: 10.3390/recycling8010018

Maximilian Auer, J. Schmidt, J. Diemert, Gabriel Gerhardt, Maximilian Renz, Viola Galler, Jörg Woidasky

引用次数: 2

Trends in Extraction of Rare Earth Elements from Coal Ashes: A Review 从煤灰中提取稀土元素的研究进展

IF 4.3

Recycling Pub Date : 2023-01-30 DOI: 10.3390/recycling8010017

Gjergj Dodbiba, T. Fujita

引用次数: 2

Fruit and Restaurant Waste Polysaccharides Recycling Producing Xylooligosaccharides 水果和餐馆废弃多糖回收生产低聚木糖

IF 4.3

Recycling Pub Date : 2023-01-26 DOI: 10.3390/recycling8010016

B. Pereira, A. Schmatz, Carolina Moreno de Freitas, Fernando Masarin, M. Brienzo

{"title":"Fruit and Restaurant Waste Polysaccharides Recycling Producing Xylooligosaccharides","authors":"B. Pereira, A. Schmatz, Carolina Moreno de Freitas, Fernando Masarin, M. Brienzo","doi":"10.3390/recycling8010016","DOIUrl":"https://doi.org/10.3390/recycling8010016","url":null,"abstract":"A significant part of fruit production is wasted annually, a material of high value without use, causing environmental and social damage. These residues from agro-industrial processes, or those that can no longer be used in the market, can be recycled and generate value-added products by pretreatments/hydrolysis. One of the important pretreatments is acid hydrolysis, which can produce xylooligosaccharides (XOS) from biomass, a product of great commercial value in the food and pharmaceutical markets, mainly due to its prebiotic potential. Bananas, oranges, and guava generate a large volume of waste and represent much of Brazil’s fruit production. The dilute acid hydrolysis resulted in XOS production of 37.69% for banana peel, 59.60% for guava bagasse, 28.70% for orange bagasse, and 49.64% for restaurant residue. XOS were quantified by a liquid chromatograph system with a Bio-Rad Aminex HPX-87C column. The results show that, for this type of material and hydrolysis, the ideal conditions to produce XOS are high temperature, low time, and high acid concentration for banana peel residue (160 °C, 15 min, and 3% H2SO4), low temperature, low time, and high acid concentration for guava bagasse (100 °C,15 min and 3% H2SO4), high temperature and acid concentration with low time for orange bagasse (160 °C,15 min and 3% H2SO4) and high temperature and time and high acid concentration for restaurant waste (160 °C, 55 min and 3% H2SO4). This study identified acid hydrolysis conditions that maximized XOS production with a low amount of xylose production using agro-industrial and food residues, also showing the high potential of the chosen residues through the high yields of XOS production.","PeriodicalId":36729,"journal":{"name":"Recycling","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2023-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49290179","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}

引用次数: 2

Life Cycle Assessment (LCA) of 3D Concrete Printing and Casting Processes for Cementitious Materials Incorporating Ground Waste Tire Rubber 含废轮胎橡胶胶凝材料的3D混凝土打印和铸造工艺的生命周期评估

IF 4.3

Recycling Pub Date : 2023-01-20 DOI: 10.3390/recycling8010015

M. Sambucci, Ilario Biblioteca, M. Valente

{"title":"Life Cycle Assessment (LCA) of 3D Concrete Printing and Casting Processes for Cementitious Materials Incorporating Ground Waste Tire Rubber","authors":"M. Sambucci, Ilario Biblioteca, M. Valente","doi":"10.3390/recycling8010015","DOIUrl":"https://doi.org/10.3390/recycling8010015","url":null,"abstract":"Ordinary concrete is an indispensable construction material of modern society which is used for everything from mundane road pavements to building structures. However, it is often used for non-load-bearing applications (for instance, insulating lightweight building units) where mechanical strength is not a priority. This leads to an avoidable depletion of natural aggregates which could instead be replaced by alternative waste materials capable of conferring to the material the desired performance while ensuring a “green” route for their disposal. Furthermore, the automation of production processes via 3D printing can further assist in the achievement of a more advanced and sustainable scenario in the construction sector. In this work, performance and environmental analyses were conducted on a 3D-printable cementitious mix engineered with ground waste tire rubber aggregates. The research proposed a comparative study between rubberized concrete mixes obtained by 3D printing and traditional mold-casting methods to achieve a comprehensive analysis in terms of the mix design and manufacturing process. To evaluate the environmental performance (global warming potential and cumulative energy demand) of the investigated samples, Life Cycle Assessment models were built by using the SimaPro software and the Ecoinvent database. The Empathetic Added Sustainability Index, which includes mechanical strength, durability, thermo-acoustic insulation, and environmental indicators, was defined to quantify the overall performance of the samples in relation to their engineering properties and eco-footprint.","PeriodicalId":36729,"journal":{"name":"Recycling","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2023-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45416071","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}

引用次数: 5

Acknowledgment to the Reviewers of Recycling in 2022 感谢2022年回收审查员

IF 4.3

Recycling Pub Date : 2023-01-13 DOI: 10.3390/recycling8010014

引用次数: 0

Pyro-Hydrometallurgy Routes to Recover Silica from Indonesian Ferronickel Slag 从印尼镍铁渣中回收二氧化硅的热湿法工艺研究

IF 4.3

Recycling Pub Date : 2023-01-13 DOI: 10.3390/recycling8010013

R. M. Ulum, Natalin, R. Riastuti, W. Mayangsari, A. Prasetyo, J. Soedarsono, A. Maksum

{"title":"Pyro-Hydrometallurgy Routes to Recover Silica from Indonesian Ferronickel Slag","authors":"R. M. Ulum, Natalin, R. Riastuti, W. Mayangsari, A. Prasetyo, J. Soedarsono, A. Maksum","doi":"10.3390/recycling8010013","DOIUrl":"https://doi.org/10.3390/recycling8010013","url":null,"abstract":"Ferronickel slag is a by-product of nickel smelting that provides an abundant silica source. Based on data, every ton of nickel production is equal to eight tons of ferronickel slag production, increasing without any recycling process. It is essential to create an end-to-end process for nickel production and its by-products because this would be a problem in the future and is relevant for many industrialized countries. This study describes a strategy to process ferronickel slag to produce silica. A pyrometallurgy–hydrometallurgy process and ferronickel slag were used to increase the silica content. The process was conducted through alkali fusion; the ferronickel slag was mixed with sodium carbonate at a temperature of 1000 °C for an hour and continued via leaching, precipitation, and cleaning processes. The leaching process was conducted with four concentrations (4 M, 6 M, 8 M, and 10 M) of sodium hydroxide and three different leaching durations (2 h, 4 h, and 6 h). Using hydrochloric acid (HCl) at pH 2 and deionized (DI) water cleaning, the precipitation process was adopted to synthesize a silica powder with the lowest agglomeration and enhance its purity. Characterization was carried out using X-ray Diffraction (XRD), Scanning Electron Microscopy–Energy-Dispersive Emission (SEM-EDS), X-ray Fluorescence (XRF), and Inductively Coupled Plasma–Optical Emission Spectroscopy (ICP-OES). This study highlighted silica characteristics that indicate high recovery by 85% through alkali fusion, HCl leaching, precipitation, and deionized water cleaning.","PeriodicalId":36729,"journal":{"name":"Recycling","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2023-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47740693","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}

引用次数: 1

Comparison between the Mechanical Recycling Behaviour of Amorphous and Semicrystalline Polymers: A Case Study 非晶态和半晶态聚合物机械回收性能的比较：一个案例研究

IF 4.3

Recycling Pub Date : 2023-01-10 DOI: 10.3390/recycling8010012

A. A. Costa, P. Martinho, F. Barreiros

{"title":"Comparison between the Mechanical Recycling Behaviour of Amorphous and Semicrystalline Polymers: A Case Study","authors":"A. A. Costa, P. Martinho, F. Barreiros","doi":"10.3390/recycling8010012","DOIUrl":"https://doi.org/10.3390/recycling8010012","url":null,"abstract":"The increase in waste has motivated the adoption of the circular economy concept, which assumes particular relevance in the case of plastic materials. This has led to research of new possibilities for recycling plastics after their end-of-life. To achieve this goal, it is fundamental to understand how the materials’ properties change after recycling. This study aims to evaluate the thermal and mechanical properties of recycled plastics, namely polycarbonate (PC), polystyrene (PS), glass fibre-reinforced polyamide 6 (PA6-GF30), and polyethylene terephthalate (PET). With this purpose, injected samples were mechanically recycled twice and compared through thermal and mechanical tests, such as differential scanning calorimetry, hardness, tensile strength, and the melt flow rate. The results show that the amorphous materials used do not suffer significant changes in their properties but exhibit changes in their optical characteristics. The semicrystalline ones present some modifications. PET is the material that suffers the biggest changes, both in its flowability and mechanical properties. This work demonstrates that the mechanical recycling process may be an interesting possibility for recycling depending on the desired quality of final products, allowing for some materials to maintain comparable thermal and mechanical properties after going through the recycling process.","PeriodicalId":36729,"journal":{"name":"Recycling","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2023-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47459264","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}

引用次数: 4