Journal articles: 'Recycling techniques'

1

FUJITA, TOYOHISA. "Recycling. Physical Separation Techniques. Magnetic Separation." Shigen-to-Sozai 113, no. 12 (1997): 916–19. http://dx.doi.org/10.2473/shigentosozai.113.916.

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OWADA, SHUJI. "Recycling. Physical Separation Techniques. Electrical Separation." Shigen-to-Sozai 113, no. 12 (1997): 920–23. http://dx.doi.org/10.2473/shigentosozai.113.920.

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SHIBATA, JUNJI. "Recycling. Extraction and Recovery Techniques. Cementation." Shigen-to-Sozai 113, no. 12 (1997): 948–51. http://dx.doi.org/10.2473/shigentosozai.113.948.

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TSURUTA, Kazuhiro. "The Recycling Techniques of Kitakyushu Ecotown." Journal of The Institute of Electrical Engineers of Japan 126, no. 3 (2006): 132–35. http://dx.doi.org/10.1541/ieejjournal.126.132.

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Wang, De Cai, Yu Mei Li, and Qing Wang. "Discussion on Pavement Recycling Techniques in China." Advanced Materials Research 415-417 (December 2011): 1749–54. http://dx.doi.org/10.4028/www.scientific.net/amr.415-417.1749.

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This paper pointed out that regeneration is the necessary condition of achieving circular economy and sustainable development,aslo is the inevitable trend of the national highway development. By analyzing and comparison among four different ways, it is concluded that cold in plant recycling has more advantages on economic,rationality,energy-saving & environment-friendly and so on. On the basis of comparison in four different regeneration methods, the writer analysis technology and economic advantages and prospects of application of the emulsified asphalt cold in plant recycling, combining with the status quo of highway maintenance and improvement, and point out that emulsified asphalt cold in plant recycling is the ideal choice to solve our current semi-rigid base problem,which avoid reflective cracking and extend the pavement life.

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SAKAMOTO, HIROSHI. "Recycling. Physical Separation Techniques. Crushing and Grinding." Shigen-to-Sozai 113, no. 12 (1997): 899–903. http://dx.doi.org/10.2473/shigentosozai.113.899.

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TSUNEKAWA, MASAMI. "Recycling. Physical Separation Techniques. Sizing and Classification." Shigen-to-Sozai 113, no. 12 (1997): 904–7. http://dx.doi.org/10.2473/shigentosozai.113.904.

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TANAKA, MIKIYA. "Recycling. Extraction and Recovery Techniques. Solvent Extraction." Shigen-to-Sozai 113, no. 12 (1997): 940–44. http://dx.doi.org/10.2473/shigentosozai.113.940.

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UMETSU, YOSHIAKI. "Recycling. Extraction and Recovery Techniques. Electrolytic Processes." Shigen-to-Sozai 113, no. 12 (1997): 945–47. http://dx.doi.org/10.2473/shigentosozai.113.945.

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TAKEDA, YOICHI. "Recycling. Extraction and Recovery Techniques. Pyrometallurgical Refining." Shigen-to-Sozai 113, no. 12 (1997): 952–57. http://dx.doi.org/10.2473/shigentosozai.113.952.

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HIROYOSHI, NAOKI. "Recycling. Extraction and Recovery Techniques. Microbiological Treatment." Shigen-to-Sozai 113, no. 12 (1997): 958–61. http://dx.doi.org/10.2473/shigentosozai.113.958.

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Dawood, Lamyaa Mohammed, and Zuher Hassan Abdullah. "Employing 3R Techniques in Managing Cement Industry Waste." Journal of University of Babylon for Engineering Sciences 26, no. 2 (January 1, 2018): 8–19. http://dx.doi.org/10.29196/jub.v26i2.375.

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Waste management conserves human health, ownership, environment, and keeps valuable natural resources. Lean-green waste of an organization’s operations can be decreased through implementation 3R (Reduce, Reuse, and Recycling) techniques by reduction of manufacturing system wastes. This research aims to integrate lean-green waste of the manufacturing system throughout employing 3R techniques and weighted properties method in order to manage waste. Al-Kufa cement plant is employed as a case study. Results are generated using Edraw Max Version 7 and Excel. Overall results show reduce technique of lean-green waste management has major contribution of 55 % and recycling technique has minor contribution 18 %. Defects waste has major integration of lean-green waste, while air emissions waste has minor integration of lean-green waste.

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Cui, Su Ping, Qi Dong Liu, Jian Hua Yan, and Xin Du. "A Brief Analysis of Domestic Construction and Demolition Waste Recycling Techniques." Key Engineering Materials 509 (April 2012): 1–5. http://dx.doi.org/10.4028/www.scientific.net/kem.509.1.

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In this paper, the construction and demolition waste (C&D waste) recycling techniques in China is summarized, and proposed the C&D waste recycling suggestions in this foundation. The C&D waste can be divided into construction waste, decorating waste, demolition waste and natural disaster ruin waste. In addition to be buried, domestic C&D waste can be made into landscape material, roadbed material, recycled aggregate, recycled brick, recycled concrete, recycled admixture and so on. The state should establish positive promoting policies, improve the recycling industrial chain, and promote the healthy development of the C&D waste recycling.

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Bowers, Benjamin F., David E. Allain, and Brian K. Diefenderfer. "Review of Agency Pavement Recycling Construction Specifications." Transportation Research Record: Journal of the Transportation Research Board 2674, no. 8 (July 1, 2020): 243–51. http://dx.doi.org/10.1177/0361198120931503.

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Cold in-place recycling, cold central plant recycling, and full depth reclamation are cost-effective, environmentally conscious pavement rehabilitation or reconstruction techniques. Although these techniques are not new, they have not been widely adopted among state agencies. There has, however, been a recent resurgence in interest in these techniques. To date there are no national specification guidelines for these processes to assist in their widespread implementation, and those specifications that do exist often have a wide range of requirements. This paper presents the results of a review of state and local agency specifications for pavement recycling techniques and offers suggestions to help agencies achieve a better and longer-lasting product when specifying pavement recycling techniques.

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OKANO, YASUHIKO. "Recycling. Physical Separation Techniques. Evaluation of Separation Performance." Shigen-to-Sozai 113, no. 12 (1997): 929–31. http://dx.doi.org/10.2473/shigentosozai.113.929.

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Venugopal, Adith, Harsh Tejani, Paolo Manzano, and Ronaldo G. Vergara. "Comparison of Two Different Orthodontic Bracket Recycling Techniques." Orthodontic Journal of Nepal 6, no. 2 (December 31, 2016): 28–32. http://dx.doi.org/10.3126/ojn.v6i2.17417.

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Introduction: The cost of orthodontic treatment in most of the industrialized countries may considerably differ from those in third world countries. The lesser cost of orthodontic treatment, high pricing of orthodontic inventory and poor economic conditions of the people strengthen the notion of ‘recycling’ even more.Objectives: To compare the shear bond strengths of .022 slot pre-adjusted edgewise brackets with conventional mesh base design recycled by two different chair-side techniques, one being flaming/heating and other being sandblasting.Materials & Method: The sample involved eighty extracted human premolars with .022 slot pre-adjusted edgewise brackets (Orcmo, USA) bonded onto the lingual surface. After initial de-bonding the bracket base was studied under a scanning electron microscope at different magnifications for aperture size, mesh continuity and surface roughness. The brackets were re-bonded on to the labial surface of the same premolars and then debonded using a Universal Testing Machine to produce a shear force at the tooth bracket interface.Result: The study showed highest bond strengths with the control group (111.52 ± 49.90 N) and least bond strengths with the heating/flaming group (63.71 ± 22.43 N). Reduced aperture dimensions and loss of mesh continuity were characteristics of the Heating group. Sand Blasting showed significantly higher bond strengths (100.42 ± 39.42 N) with considerably rougher mesh surface texture compared to heating group.Conclusion: Sand blasting as a mode to reconditioned orthodontic bracket base provides a higher shear bond strength compared to orthodontic brackets reconditioned by heating/ flaming (p< .01).

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S. Aishwariya, S. Aishwariya. "Observations on Recycling Techniques for Textiles - A Review." International Journal of Textile and Fashion Technology 8, no. 4 (2018): 19–24. http://dx.doi.org/10.24247/ijtftaug20184.

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ISHIKURA, Takeshi, Daiichiro OGURI, and Mitsuaki SUKEKIYO. "Development of Recycling Techniques on Decommissioning Concrete Waste." Proceedings of the National Symposium on Power and Energy Systems 2000.7 (2000): 372–77. http://dx.doi.org/10.1299/jsmepes.2000.7.372.

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Abdelbasir, Sabah M., Saad S. M. Hassan, Ayman H. Kamel, and Rania Seif El-Nasr. "Status of electronic waste recycling techniques: a review." Environmental Science and Pollution Research 25, no. 17 (May 8, 2018): 16533–47. http://dx.doi.org/10.1007/s11356-018-2136-6.

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Buchan, R., and B. Yarar. "Recovering plastics for recycling by mineral processing techniques." JOM 47, no. 2 (February 1995): 52–55. http://dx.doi.org/10.1007/bf03221410.

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Dodbiba, G., and T. Fujita. "Progress in Separating Plastic Materials for Recycling." Physical Separation in Science and Engineering 13, no. 3-4 (January 1, 2004): 165–82. http://dx.doi.org/10.1080/14786470412331326350.

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In order to deal with the problems facing the plastics processing industry research, work is focused primarily on designing, developing and testing a variety of separation and sorting techniques able to recover plastics from wastes, which can be re-used or re-processed to form new products. In this regard, technologies developed in mineral processing can be of great help. Various techniques for separating plastics materials have been recently developed. These techniques can be divided in two main categories, i.e. wet separating techniques and dry separating techniques. This paper presents the recent progress in separating plastics reviewing the potential of the available techniques.

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Vermeșan, Horațiu, Ancuța-Elena Tiuc, and Marius Purcar. "Advanced Recovery Techniques for Waste Materials from IT and Telecommunication Equipment Printed Circuit Boards." Sustainability 12, no. 1 (December 20, 2019): 74. http://dx.doi.org/10.3390/su12010074.

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Waste from information technology (IT) and telecommunication equipment (WITTE) constitutes a significant fraction of waste from electrical and electronic equipment (WEEE). The presence of rare metals and hazardous materials (e.g., heavy metals or flame retardants) makes the necessary recycling procedures difficult and expensive. Important efforts are being made for Waste Printed Circuit Board (WPCB) recycling because, even if they only amount to 5–10% of the WITTE weight, they constitute up to 80% of the recovered value. This paper summarizes the recycling techniques applicable to WPCBs. In the first part, dismantling and mechanical recycling techniques are presented. Within the frame of electro-mechanical separation technology, the chain process of shredding, washing, and sieving, followed by one or a combination of magnetic, eddy current, corona electrostatic, triboelectrostatic, or gravity separation techniques, is presented. The chemical and electrochemical processes are of utmost importance for the fine separation of metals coming from complex equipment such as WPCBs. Thermal recycling techniques such as pyrolysis and thermal treatment are presented as complementary solutions for achieving both an extra separation stage and thermal energy. As the recycling processes of WPCBs require adequate, efficient, and ecological recycling techniques, the aim of this survey is to identify and highlight the most important ones. Due to the high economic value of the resulting raw materials relative to the WPCBs’ weight and composition, their recycling represents both a necessary environmental protection action, as well as an economic opportunity.

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Granados-Fernández, Rafael, Miguel A. Montiel, Sergio Díaz-Abad, Manuel A. Rodrigo, and Justo Lobato. "Platinum Recovery Techniques for a Circular Economy." Catalysts 11, no. 8 (July 31, 2021): 937. http://dx.doi.org/10.3390/catal11080937.

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Platinum and other metals are very scarce materials widely used in the energy and transportation sector among other sectors. Obtaining Platinum is becoming more difficult due to its scarcity on earth and because of the high amount of energy and water used for its extraction. In this regard, the recycling of platinum is necessary for sustainable technologies and for reaching a circular economy towards this expensive and rare metal. Conventional methods for platinum recycling make use of enormous amounts of energy for its recovery, which makes them not very attractive for industry implementation. Furthermore, these processes generate very toxic liquid streams and gas wastes that must be further treated, which do not meet the green environmental point of view of platinum recycling. Consequently, new advanced technologies are arising aiming to reach very high platinum recovery rates while being environmentally friendly and making a huge reduction of energy use compared with the conventional methods. In this review, conventional platinum recovery methods are summarized showing their limitations. Furthermore, new and promising approaches for platinum recovery are reviewed to shed light on about new and greener ways for a platinum circular economy.

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Levrie, Paul, and Amrik Singh Nimbran. "Recycling Stirling's series acceleration technique." Mathematical Gazette 101, no. 550 (February 3, 2017): 69–82. http://dx.doi.org/10.1017/mag.2017.7.

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Infinite series are an important topic in mathematical analysis and convergence is the most crucial concept in the theory of infinite series. The speed at which the sequence of the partial sums of a series approaches its limiting sum has been a subject of investigation for many a mathematician. Euler [1], Kummer [2] and Markoff [3] all developed techniques for accelerating the convergence of slowly converging series. Euler's method only works for alternating series, Kummer's and Markoff's are suitable for general series with a special form.Gosper [4] illustrates how the rate of convergence of infinite series can be accelerated by a suitable splitting of each term into two parts and then combining the second part of the n th term with the first part of n + 1 th the term and leaving the first part of the first term. Repeated application of this process yields a new series which approaches 0 and the series of the left out first parts (‘orphans’) that converges faster than the original series.

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Zha, Ji Li, Shao Yong Xu, Guo Qiang You, and Si Yuan Long. "A Continuous Fluxless Purification Technique for Mg Scrap Melt." Advanced Materials Research 295-297 (July 2011): 2151–54. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.2151.

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In the present paper, the current state of magnesium scrap recycling via melt refinement was reviewed and the difficulties confronted in the developing fluxless techniques were highlighted. Then, the working principle of a fluxless technique newly developed in China was briefly introduced followed by chemical and light microscopy investigation of the processing quality of the recycled ingots in comparison with the commercial ingot produced with predominant flux processing to have a first insight into the difference of the two refining techniques. The results indicate that a stable, continuous and cost effective melt refinement can be achieved with the commercial Mg scraps in-house fluxless recycling system.

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ITO, SHIN'ICHI. "Recycling. Physical Separation Techniques. Hand Picking and Photometric Sorting." Shigen-to-Sozai 113, no. 12 (1997): 908–11. http://dx.doi.org/10.2473/shigentosozai.113.908.

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MATSUOKA, ISAO. "Recycling. Physical Separation Techniques. Flotation and Liquid-Liquid Extraction." Shigen-to-Sozai 113, no. 12 (1997): 924–28. http://dx.doi.org/10.2473/shigentosozai.113.924.

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Hadi, Pejman, Meng Xu, Carol S. K. Lin, Chi-Wai Hui, and Gordon McKay. "Waste printed circuit board recycling techniques and product utilization." Journal of Hazardous Materials 283 (February 2015): 234–43. http://dx.doi.org/10.1016/j.jhazmat.2014.09.032.

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Markatos, Dionysios N., Christos V. Katsiropoulos, Konstantinos I. Tserpes, and Spiros G. Pantelakis. "A holistic End-of-Life (EoL) Index for the quantitative impact assessment of CFRP waste recycling techniques." Manufacturing Review 8 (2021): 18. http://dx.doi.org/10.1051/mfreview/2021016.

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In the present study, a holistic End-of-Life (EoL) Index is introduced to serve as a decision support tool for choosing the optimal recycling process among a number of alternative recycling techniques of CFRP waste. For the choice of the optimal recycling process, quality of the recycled fibers as well as cost and environmental impact of the recycling methods under consideration, are accounted for. Quality is interpreted as the reusability potential of the recycled fibers; that is quantified through the equivalent volume fraction of recycled fibers that balances the mechanical properties of a composite composed of a certain volume fraction of virgin fibers. The proposed Index is offering an estimated balanced score, quantifying a trade-off between the reusability potential of the recycled fibers as well as the cost and the environmental impact of the recycling methods considered.

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Saisinchai, Somsak. "Glass Sand Processing Techniques in the Rayong Area, Thailand." Advanced Materials Research 858 (November 2013): 254–64. http://dx.doi.org/10.4028/www.scientific.net/amr.858.254.

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This article discusses the beneficiation of glass sand at Rayong province in the eastern part of Thailand . The process consists of revolving screen, hydrocyclone, attrition scrubber, tank classifier, spiral concentrator, wet high intensity magnetic separator and closed loop water recycling system. There are 13 glass sand processing plants in this area with the overall capacity 2 million tons per year and supply glass sand to float glass and flat glass industry, glassware industry, glass packaging industry, ceramic industry and chemical industry in Thailand. Keywords: Glass sand, Revolving screen, Hydrocyclon, Attrition scrubber, Tank classifier, Spiral concentrator, Wet high intensity magnetic separator, Closed loop water recycling system.

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Kabashima, John. "INNOVATIVE IRRIGATION TECHNIQUES IN NURSERY PRODUCTION TO REDUCE WATER USAGE." HortScience 25, no. 9 (September 1990): 1183d—1183. http://dx.doi.org/10.21273/hortsci.25.9.1183d.

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Several production nurseries were surveyed about techniques used to reduce water usage and runoff. The nurseries surveyed used from 400,000 gallons of water per day to 5,000,000 gallons of water per day during peak usage. Water availability and the potential for nitrate runoff from large production nurseries to contaminate the environment have resulted in requirements by regulatory agencies to decrease water usage and runoff. Nurseries have complied by using techniques such as drip irrigation, subirrigation, pulsing, recycling, and computer controlled irrigation systems. The use of techniques such as recycling and “better management practices” have resulted in significant decreases (approximately 30%) in water usage.

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AWAKURA, YASUHIRO. "Recycling. Extraction and Recovery Techniques. Pretreatment by Laundry Techniques. Leaching and Recovery by Hydrometallurgy." Shigen-to-Sozai 113, no. 12 (1997): 932–35. http://dx.doi.org/10.2473/shigentosozai.113.932.

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NAKAMURA, TAKASHI. "Recycling. Extraction and Recovery Techniques. Pretreatment by Laundry Techniques. Pretreatment by Roasting and Calcination." Shigen-to-Sozai 113, no. 12 (1997): 936–39. http://dx.doi.org/10.2473/shigentosozai.113.936.

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Trotta, Oriana, Giuseppe Bonifazi, Giuseppe Capobianco, and Silvia Serranti. "Recycling-Oriented Characterization of Post-Earthquake Building Waste by Different Sensing Techniques." Journal of Imaging 7, no. 9 (September 8, 2021): 182. http://dx.doi.org/10.3390/jimaging7090182.

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In this paper, a methodological approach based on hyperspectral imaging (HSI) working in the short-wave infrared range (1000–2500 nm) was developed and applied for the recycling-oriented characterization of post-earthquake building waste. In more detail, the presence of residual cement mortar on the surface of tile fragments that can be recycled as aggregates was estimated. The acquired hyperspectral images were analyzed by applying different chemometric methods: principal component analysis (PCA) for data exploration and partial least-squares-discriminant analysis (PLS-DA) to build classification models. Micro-X-ray fluorescence (micro-XRF) maps were also obtained on the same samples in order to validate the HSI classification results. Results showed that it is possible to identify cement mortar on the surface of the recycled tile, evaluating its degree of liberation. The recognition is automatic and non-destructive and can be applied for recycling-oriented purposes at recycling plants.

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Blinová, Lenka, and Peter Godovčin. "Importance of Recycling the Waste-Cables Containing Copper and PVC." Research Papers Faculty of Materials Science and Technology Slovak University of Technology 29, no. 48 (June 1, 2021): 1–21. http://dx.doi.org/10.2478/rput-2021-0001.

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Abstract Urbanization, development of economy, increasing population and improved living standards and lifestyle have caused a sharp growth in waste. Inappropriate or inefficient waste disposal techniques can cause serious air, soil, and groundwater pollution, which subsequently can negatively affect the urban environment and threaten the health of residents. The goal of waste management is to move to a circular economy in which waste does not exist. If there is no possible way to reduce or reuse waste, the best solution is recycling it. Recycling brings abundant benefits on the economic and ecological levels levels, and helps reduce overall human health risk of adverse impacts. Recycling of the waste-cables which contain PVC and copper replaces the production of virgin PVC and mining of copper from copper ore, it reduces landfill solid waste pressures, saves energy and water sources, reduces emissions to environment, and also reduces negative impacts from improperly dispose of waste, etc. This paper presents an overview of recycling techniques for the waste-cables containing copper as a core and polyvinyl chloride as an insulating layer or sheath. It also lists advantages and disadvantages of these techniques and importance of recycling this type of waste.

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Aguilar-Jurado, Miguel Ángel, Pedro Gil-Madrona, Juan Francisco Ortega-Dato, and David Zamorano-García. "Effects of an Educational Glass Recycling Program against Environmental Pollution in Spain." International Journal of Environmental Research and Public Health 16, no. 24 (December 14, 2019): 5108. http://dx.doi.org/10.3390/ijerph16245108.

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In this article, we analyzed the effects of an educational glass recycling program on primary schools and their students in Castilla-La Mancha (Spain). A sample of 89 schools, with 20,710 elementary students, was selected by simple random sampling. For the statistical analysis, descriptive techniques (frequencies and statistics), parametric (One Way ANOVA test), and non-parametric (Chi-Square test) inferential techniques were used, with a 5% significance level (p < 0.05). The program’s results showed that 153,576.3 kg of glass (with a value of 17,064.03 €) were recycled. Significant determinants of glass recycling were: School category (p = 0.043), previous environmental/recycling education (p = 0.046), geographic location of school (p = 0.030), gender (p = 0.007), and academic year (p < 0.05). With the program, students learned the importance of glass recycling, obtained a greater knowledge of and habits related to the same, acquired favorable attitudes towards the environment, and promoted glass recycling in their social circles. We conclude that environmental education about glass recycling has positive effects on glass recycling attitudes and behaviors in elementary school students and may be used as a measure to combat the problem of environmental pollution.

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Zhang, Ji Juan. "Study on the Recycling Technical Measures of Deserted Wood Furniture Materials." Advanced Materials Research 496 (March 2012): 534–37. http://dx.doi.org/10.4028/www.scientific.net/amr.496.534.

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In order to strengthen the recycling of deserted wood material, it is important to use the techniques of furniture product recovery design, establish and improve the deserted furniture recycling system, and develop industry recycling technology. Which can reduce the pollution of the environment, and expand the raw materials sources of wood-based panel industry.

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Jung, Seok-ho, Mee-hye Lee, Seong-ho Lee, and Ji Whan Ahn. "A Study on the Trend of Domestic Waste Generation and the Recognition of Recycling Priorities in Korea." Sustainability 13, no. 4 (February 5, 2021): 1732. http://dx.doi.org/10.3390/su13041732.

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In September 2015, the United Nations included ‘sustainable consumption and production’ as part of its 12th goal of sustainable development. The EU announced its Circular Economic Package in December 2015 to move from the existing linear economic structure to the net environmental system. Recycling of household waste has become more significant as a circular economic policy has been implemented to reflow waste into the economy through recycling worldwide. In this study, Korea’s household waste generation for 20 years from 1998 to 2017 was analyzed through statistical techniques. Waste generation tended to increase in the order of plastics and cans, and papers tended to decrease. The amount of bottle wastes has been on the decline after increasing. A questionnaire survey on recycling priority was conducted on 261 people, including participants in the EARTH-2019 recycling experience hall, using the analytic hierarchy process (AHP) technique. According to the survey, the recycling priorities of six types of household waste are (first) plastic, (second) cans, viny, scrap metals, (third) paper, and (fourth) bottles. Statistical analysis of mid- to long-term household waste generation and AHP-based household waste recycling priority survey results can be used as basic data, such as environmental analysis in Korea’s recycling-related policies and research.

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NAKAHIRO, YOSHITAKA. "Recycling. Physical Separation Techniques. Gravity Separation and Heavy Media Separation." Shigen-to-Sozai 113, no. 12 (1997): 912–15. http://dx.doi.org/10.2473/shigentosozai.113.912.

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Shamsudin, Shazarel, MA Lajis, and Z. W. Zhong. "Evolutionary in Solid State Recycling Techniques of Aluminium: A review." Procedia CIRP 40 (2016): 256–61. http://dx.doi.org/10.1016/j.procir.2016.01.117.

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Gueroult, Renaud, Jean-Marcel Rax, and Nathaniel J. Fisch. "Opportunities for plasma separation techniques in rare earth elements recycling." Journal of Cleaner Production 182 (May 2018): 1060–69. http://dx.doi.org/10.1016/j.jclepro.2018.02.066.

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Syed, S. "Silver recovery aqueous techniques from diverse sources: Hydrometallurgy in recycling." Waste Management 50 (April 2016): 234–56. http://dx.doi.org/10.1016/j.wasman.2016.02.006.

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Tuncuk, A., V. Stazi, A. Akcil, E. Y. Yazici, and H. Deveci. "Aqueous metal recovery techniques from e-scrap: Hydrometallurgy in recycling." Minerals Engineering 25, no. 1 (January 2012): 28–37. http://dx.doi.org/10.1016/j.mineng.2011.09.019.

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Solokhin, A. V., S. L. Nazanskii, and T. V. Milyaeva. "Recycling techniques for enhancing the selectivity of complex chemical reactions." Theoretical Foundations of Chemical Engineering 45, no. 3 (June 2011): 267–71. http://dx.doi.org/10.1134/s0040579511030122.

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BUTLEWSKI, KRYSTIAN. "Anaerobic digestion and microwave pyrolysis techniques for recycling organic wastes." Polimery 64, no. 11/12 (November 2019): 811–17. http://dx.doi.org/10.14314/polimery.2019.11.10.

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Macias, Alvaro, Alicia de la Cruz, Diego A. Peraza, Angela de Benito-Bueno, Teresa Gonzalez, and Carmen Valenzuela. "KV1.5–KVβ1.3 Recycling Is PKC-Dependent." International Journal of Molecular Sciences 22, no. 3 (January 29, 2021): 1336. http://dx.doi.org/10.3390/ijms22031336.

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KV1.5 channel function is modified by different regulatory subunits. KVβ1.3 subunits assemble with KV1.5 channels and induce a fast and incomplete inactivation. Inhibition of PKC abolishes the KVβ1.3-induced fast inactivation, decreases the amplitude of the current KV1.5–KVβ1.3 and modifies their pharmacology likely due to changes in the traffic of KV1.5–KVβ1.3 channels in a PKC-dependent manner. In order to analyze this hypothesis, HEK293 cells were transfected with KV1.5–KVβ1.3 channels, and currents were recorded by whole-cell configuration of the patch-clamp technique. The presence of KV1.5 in the membrane was analyzed by biotinylation techniques, live cell imaging and confocal microscopy approaches. PKC inhibition resulted in a decrease of 33 ± 7% of channels in the cell surface due to reduced recycling to the plasma membrane, as was confirmed by confocal microscopy. Live cell imaging indicated that PKC inhibition almost abolished the recycling of the KV1.5–KVβ1.3 channels, generating an accumulation of channels into the cytoplasm. All these results suggest that the trafficking regulation of KV1.5–KVβ1.3 channels is dependent on phosphorylation by PKC and, therefore, they could represent a clinically relevant issue, mainly in those diseases that exhibit modifications in PKC activity.

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Alam, Md Rakibul, Kamal Hossain, Ali Azhar Butt, Tim Caudle, and Carlos Bazan. "Life cycle assessment of asphalt pavement maintenance and rehabilitation techniques: a study for the City of St. John’s." Canadian Journal of Civil Engineering 47, no. 12 (December 2020): 1320–26. http://dx.doi.org/10.1139/cjce-2019-0540.

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Although pavement maintenance and rehabilitation (M&R) techniques are usually examined in economic terms, there is a growing need to address their environmental footprints. The objective of this study is to assess the environmental impacts of M&R techniques. Life cycle assessment (LCA) can help in the decision-making process of selecting suitable maintenance techniques based on their environmental impacts. This study investigates: patching, rout & sealing, hot in-place recycling, and cold in-place recycling. Global warming potential (GWP), acidification potential, human health particulate, eutrophication potential, ozone depletion potential, and smog potential are estimated as environmental impacts for each maintenance activity. Materials, equipment use (for construction and M&R), and transportation were the main elements considered. A sensitivity test is performed to identify the significant factors for the LCA. The study concluded that GWP was the most important impact category. Rout & sealing and cold in-place recycling produced the lowest GWP emissions. Notably, pavement patching and hot in-place recycling showed significant detrimental environmental impacts.

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Barlishen, K. D., and B. W. Baetz. "Development of a decision support system for the planning of municipal solid waste composting and recycling programs." Canadian Journal of Civil Engineering 22, no. 3 (June 1, 1995): 637–45. http://dx.doi.org/10.1139/l95-072.

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The number and complexity of mathematical models to assist municipal solid waste management agencies in the planning of recycling programs are increasing. A survey of practising waste management professionals has indicated a general interest in mathematical modelling techniques to assist with decision-making, but there is a lack of practical applications of these techniques, particularly within the local and regional waste management agencies that are responsible for planning and implementing waste reduction and recycling measures. A prototype decision support system has been developed to assist with the preliminary planning of municipal solid waste composting and recycling programs and processing facilities. This prototype planning tool combines knowledge-based system components with spreadsheet models to assist with waste forecasting, technology evaluation, composting and recycling program design, and preliminary processing facility planning. The system was designed for use by local and regional solid waste management engineers and planners, and waste recycling coordinators. The prototype decision support system is considered to represent a reasonable, useful, and practical (with respect to data requirements and cost) planning tool. The knowledge bases, created for the prototype decision support system, represent the collection and organization of a significant amount of currently available expertise regarding composting and recycling program planning issues. Key words: municipal solid waste, waste management, recycling, composting, decision support systems.

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Movahed, Saeed Ostad, Ali Ansarifar, and Sara Estagy. "REVIEW OF THE RECLAIMING OF RUBBER WASTE AND RECENT WORK ON THE RECYCLING OF ETHYLENE–PROPYLENE–DIENE RUBBER WASTE." Rubber Chemistry and Technology 89, no. 1 (March 1, 2016): 54–78. http://dx.doi.org/10.5254/rct.15.84850.

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ABSTRACTRubbers do not decompose easily, and therefore, disposal of rubber waste is a serious environmental concern. Raw material costs, diminishing natural resources, and the growing awareness of environmental issues and sustainability have made rubber recycling a major area of concern. Reclaiming and recycling rubber waste is a major scientific and technological challenge facing rubber scientists today. This article reviews a number of important areas related to the reclaiming, characterizing, testing, and recycling of rubber waste. These include chemical and microbial devulcanization with particular emphasis on main chain scission and kinetics of chemical devulcanization reactions; the cutting-edge techniques for reclaiming devulcanized rubber waste by the action of large shearing forces, heat, and chemical agents: and analytical techniques and methods for characterizing composition and testing of devulcanized rubber waste, respectively. In addition, some aspects of the recycling of devulcanized ethylene–propylene–diene rubber (EPDM) waste will be reported. EPDM is used extensively in automotive components worldwide, and recycling the rubber at the end of its useful service life is of major importance to manufacturers of automotive components.

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Moon, Byungkyu, Ashkan Bozorgzad, Hosin (David) Lee, Soo-Ahn Kwon, Kyu-Dong Jeong, and Nam-Joon Cho. "Development of Warm In-Place Recycling Technique as an Eco-Friendly Asphalt Rehabilitation Method." Infrastructures 6, no. 7 (July 8, 2021): 101. http://dx.doi.org/10.3390/infrastructures6070101.

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Cold In-place Recycling (CIR) has been widely used in the world since it is easy to apply it in the field at a low cost. However, it is not normally used as a surface layer as a result of its inconsistent quality due to an excessive amount of fine aggregates pulverized during the milling process. Hot In-place Recycling (HIR) can retain the original shape of the aggregates, but it often produces a large amount of Volatile Organic Compounds (VOCs). Therefore, a third in-place recycling technique is introduced in this paper: Warm In-place Recycling (WIR). The WIR technique overcomes the limitations of both CIR and HIR techniques by lowering a heating temperature while adding a Tetraethylenepentamine (TEPA)/Soybean/SBS additive. To identify the effect of the additive on the RTFO-aged binder, viscosity and dynamic modulus values were measured at different temperatures. Based on Hamburg Wheel Tracking (HWT) and Disc-Shaped Compact Tension (DCT) tests, the additive improved the moisture susceptibility and low temperature cracking resistance. The indirect infrared heating equipment reduced the emission by lowering the pavement surface heating temperature by 20 °C from 140 to 120 °C. Compared with the heating at 140 °C, the LPG usage for heating at 140 °C was lowered by 21%. The proposed WIR equipment with an additive would revolutionize the in-place recycling practices.

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Journal articles on the topic 'Recycling techniques'

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