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Caniato M, Cozzarini L, Schmid C, Gasparella A. A sustainable acoustic customization of open porous materials using recycled plastics. Sci Rep 2022; 12:10955. [PMID: 35768484 PMCID: PMC9242981 DOI: 10.1038/s41598-022-14009-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Accepted: 05/31/2022] [Indexed: 11/18/2022] Open
Abstract
Foams are commonly used as sound absorbers and thermal insulators for many industrial and construction applications. The insulating materials market is currently dominated by inorganic fibres like glass and mineral wool, as well as plastic foams. However, worldwide plastics consumption produces huge amounts of waste, generating concerns about soil, air and especially seawater pollution. Hence, new methods for recycling marine microplastic litter according to cleaner production criteria are being sought. This paper presents a novel, sustainable and eco-friendly foamy material made of microplastic waste, namely polyethylene terephthalate (PET) and polystyrene (PS), incorporated into a bio-based matrix. Samples with different compositions were prepared and then characterized for sound absorption properties. Evidence is presented of very good acoustic performances and of how the acoustic characteristics of the end product can be customized using different microplastic content and type. This allows envisioning many industrial and civil applications for this novel open-cell material.
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Affiliation(s)
- Marco Caniato
- Faculty of Science and Technology, Free University of Bozen, 39100, Bolzano, Italy.
| | - Luca Cozzarini
- Department of Engineering and Architecture, University of Trieste, 34127, Trieste, Italy
| | - Chiara Schmid
- Department of Engineering and Architecture, University of Trieste, 34127, Trieste, Italy
| | - Andrea Gasparella
- Faculty of Science and Technology, Free University of Bozen, 39100, Bolzano, Italy
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Caniato M, Bettarello F, Gasparella A. Indoor and outdoor noise changes due to the COVID-19 lockdown and their effects on individuals' expectations and preferences. Sci Rep 2021; 11:16533. [PMID: 34400713 PMCID: PMC8368209 DOI: 10.1038/s41598-021-96098-w] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 08/03/2021] [Indexed: 12/23/2022] Open
Abstract
The COVID-19 pandemic significantly modified our urban territories. One of the most strongly affected parameters was outdoor noise, caused by traffic and human activity in general, all of which were forced to stop during the spring of 2020. This caused an indubitable noise reduction both inside and outside the home. This study investigates how people reacted to this new unexpected, unwanted and unpredictable situation. Using field measurements, it was possible to demonstrate how the outdoor sound pressure level clearly decreased. Furthermore, by means of an international survey, it was discovered that people had positive reaction to the lower noise level. This preference was generally not related to home typology or location in the city, but rather to a generalized wish to live in a quieter urban environment.
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Affiliation(s)
- Marco Caniato
- Faculty of Science and Technology, Free University of Bozen-Bolzano, Bozen, Italy.
| | - Federica Bettarello
- Department of Engineering and Architecture, University of Trieste, Trieste, Italy
| | - Andrea Gasparella
- Faculty of Science and Technology, Free University of Bozen-Bolzano, Bozen, Italy
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Caniato M, Marzi A, Gasparella A. How much COVID-19 face protections influence speech intelligibility in classrooms? Appl Acoust 2021; 178:108051. [PMID: 36530850 PMCID: PMC9746872 DOI: 10.1016/j.apacoust.2021.108051] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 03/09/2021] [Accepted: 03/11/2021] [Indexed: 05/19/2023]
Abstract
The ongoing pandemic caused by the COVID-19 virus is challenging many aspects of daily life. Several personal protective devices have become essential in our lives. Face protections are mostly used in order to stop the air aerosol coming out of our mouths. Nevertheless, this fact may also have a negative effect on speech transmission both in outdoor and indoor spaces. After a severe lockdown, classes have now started again. The adoption of face protection by teachers is either recommended or mandatory even though this is affecting speech intelligibility and thus students' comprehension. This study aims to understand how protections may affect the speech transmission in classrooms and how this could be influenced by the several typologies of face protections. An experimental campaign was conducted in a classroom in two different reverberant conditions, measuring and comparing the variation in speech transmission and sound pressure level at different receiver positions. Furthermore, a microphone array was used to investigate the distribution of the indoor sound field, depending on the sound source. Results clearly show how different types of personal protection equipment do affect speech transmission and sound pressure level especially at mid-high frequency and that the source emission lobes vary when wearing certain types of personal devices.
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Caniato M, Tudor TL, Vaccari M. Assessment of health-care waste management in a humanitarian crisis: A case study of the Gaza Strip. Waste Manag 2016; 58:386-396. [PMID: 27663706 DOI: 10.1016/j.wasman.2016.09.017] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Revised: 09/11/2016] [Accepted: 09/14/2016] [Indexed: 05/07/2023]
Abstract
Health-care waste management requires technical, financial and human resources, and it is a challenge for low- and middle income countries, while it is often neglected in protracted crisis or emergency situations. Indeed, when health, safety, security or wellbeing of a community is threatened, solid waste management usually receives limited attention. Using the Gaza Strip as the case study region, this manuscript reports on health-care waste management within the context of a humanitarian crisis. The study employed a range of methods including content analyses of policies and legislation, audits of waste arisings, field visits, stakeholder interviews and evaluation of treatment systems. The study estimated a production from clinics and hospitals of 683kg/day of hazardous waste in the Gaza Strip, while the total health-care waste production was 3357 kg/day. A number of challenges was identified including lack of clear definitions and regulations, limited accurate data on which to base decisions and strategies and poor coordination amongst key stakeholders. Hazardous and non-hazardous waste was partially segregated and treatment facilities hardly used, and 75% of the hazardous waste was left untreated. Recommendations for mitigating these challenges posed to patients, staff and the community in general are suggested. The outputs are particularly useful to support decision makers, and re-organize the system according to reliable data and sound assumptions. The methodology can be replicated in other humanitarian settings, also to other waste flows, and other sectors of environmental sanitation.
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Affiliation(s)
- Marco Caniato
- Research Laboratory on Appropriate Technologies for Environmental Management in Developing Countries (CeTAmb Lab), Department of Civil Engineering, Architecture, Land, Environment and Mathematics, University of Brescia, Italy.
| | - Terry Louis Tudor
- Centre for Sustainable Waste Management, School of Science and Technology, University of Northampton, Northampton, UK
| | - Mentore Vaccari
- Research Laboratory on Appropriate Technologies for Environmental Management in Developing Countries (CeTAmb Lab), Department of Civil Engineering, Architecture, Land, Environment and Mathematics, University of Brescia, Italy
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Affiliation(s)
- Lucia Marsich
- Department of Engineering and Architecture; University of Trieste; Trieste 34127 Italy
| | - Alessio Ferluga
- Department of Engineering and Architecture; University of Trieste; Trieste 34127 Italy
| | - Norman Venturini
- Department of Engineering and Architecture; University of Trieste; Trieste 34127 Italy
| | - Marco Caniato
- Department of Engineering and Architecture; University of Trieste; Trieste 34127 Italy
| | - Orfeo Sbaizero
- Department of Engineering and Architecture; University of Trieste; Trieste 34127 Italy
| | - Chiara Schmid
- Department of Engineering and Architecture; University of Trieste; Trieste 34127 Italy
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Caniato M, Tudor T, Vaccari M. International governance structures for health-care waste management: a systematic review of scientific literature. J Environ Manage 2015; 153:93-107. [PMID: 25687810 DOI: 10.1016/j.jenvman.2015.01.039] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Revised: 01/19/2015] [Accepted: 01/24/2015] [Indexed: 06/04/2023]
Abstract
Significant differences exist in the management of health-care waste management, globally. This is particularly so between low, middle and high-income countries. A systematic review of scientific literature on global healthcare waste management spanning the period 2000 - current was undertaken, in order to identify key policies, practices, challenges and best practice. The findings were analysed considering the Gross National Income and the Human Development Index of each country. Effective regulation and operative definitions of waste categories are key-factors requiring improvement at the national level. The economic conditions in the country are an important factor, especially regarding treatment and disposal. Areas for improvement (e.g. the need for improved governance structures, the development of regional clusters, as well as sharps waste segregation) are suggested.
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Affiliation(s)
- M Caniato
- Research Laboratory on Appropriate Technologies for Environmental Management in Resource-Limited Countries (CeTAmb LAB), University of Brescia, Brescia, Italy.
| | - T Tudor
- Centre for Sustainable Waste Management, School of Science and Technology, University of Northampton, Northampton, UK
| | - M Vaccari
- Research Laboratory on Appropriate Technologies for Environmental Management in Resource-Limited Countries (CeTAmb LAB), University of Brescia, Brescia, Italy
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Caniato M, Tudor T, Vaccari M. Understanding the perceptions, roles and interactions of stakeholder networks managing health-care waste: A case study of the Gaza Strip. Waste Manag 2015; 35:255-264. [PMID: 25445260 DOI: 10.1016/j.wasman.2014.09.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Revised: 09/16/2014] [Accepted: 09/22/2014] [Indexed: 06/04/2023]
Abstract
The sustainable management of waste requires a holistic approach involving a range of stakeholders. What can often be difficult is to understand the manner in which different types of stakeholder networks are composed and work, and how best to enhance their effectiveness. Using social network analysis and stakeholder analysis of healthcare waste management stakeholders in the case study region of the Gaza Strip, this study aimed to understand and examine the manner in which the networks functioned. The Ministry of Health was found to be the most important stakeholder, followed by municipalities and solid waste management councils. Some international agencies were also mentioned, with specific roles, while other local institutions had a limited influence. Finally while health-care facilities had a strong interest in waste management, they were generally poorly informed and had limited links to each other. The manner in which the networks operated was complicated and influenced by differences in perception, sharing of information, access to finance and levels of awareness. The lack of a clear legal framework generated various mistakes about roles and responsibilities in the system, and evidently regulation was not an effective driver for improvement. Finally stakeholders had different priorities according to the waste management issues they were involved with, however segregation at the source was identified as a key requirement by most. Areas for improving the effectiveness of the networks are suggested. The analysis utilized an innovative methodology, which involved a large number of stakeholders. Such an approach served to raise interest and awareness at different levels (public authorities, health providers, supporting actors, others), stimulate the discussion about the adoption of specific policies, and identify the effective way forward.
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Affiliation(s)
- M Caniato
- Research Centre on Appropriate Technologies for Environmental Management in Developing Countries (CeTAmb), University of Brescia, Brescia, Italy.
| | - T Tudor
- Centre for Sustainable Waste Management, School of Science and Technology, University of Northampton, Northampton, UK
| | - M Vaccari
- Research Centre on Appropriate Technologies for Environmental Management in Developing Countries (CeTAmb), University of Brescia, Brescia, Italy
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Caniato M, Vaccari M. How to assess solid waste management in armed conflicts? A new methodology applied to the Gaza Strip, Palestine. Waste Manag Res 2014; 32:908-917. [PMID: 25106536 DOI: 10.1177/0734242x14543553] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We have developed a new methodology for assessing solid waste management in a situation of armed conflict. This methodology is composed of six phases with specific activities, and suggested methods and tools. The collection, haulage, and disposal of waste in low- and middle-income countries is so complicated and expensive task for municipalities, owing to several challenges involved, that some waste is left in illegal dumps. Armed conflicts bring further constraints, such as instability, the sudden increase in violence, and difficulty in supplying equipment and spare parts: planning is very difficult and several projects aimed at improving the situation have failed. The methodology was validated in the Gaza Strip, where the geopolitical situation heavily affects natural resources. We collected information in a holistic way, crosschecked, and discussed it with local experts, practitioners, and authorities. We estimated that in 2011 only 1300 tonne day(-1) were transported to the three disposal sites, out of a production exceeding 1700. Recycling was very limited, while the composting capacity was 3.5 tonnes day(-1), but increasing. We carefully assessed system elements and their interaction. We identified the challenges, and developed possible solutions to increase system effectiveness and robustness. The case study demonstrated that our methodology is flexible and adaptable to the context, thus it could be applied in other areas to improve the humanitarian response in similar situations.
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Affiliation(s)
- Alessio Ferluga
- Department of Engineering and Architecture; University of Trieste; Via A. Valerio 6/A 34127 Trieste Italy
| | - Marco Caniato
- Department of Engineering and Architecture; University of Trieste; Via A. Valerio 6/A 34127 Trieste Italy
| | - Orfeo Sbaizero
- Department of Engineering and Architecture; University of Trieste; Via A. Valerio 6/A 34127 Trieste Italy
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Caniato M, Vaccari M, Visvanathan C, Zurbrügg C. Using social network and stakeholder analysis to help evaluate infectious waste management: a step towards a holistic assessment. Waste Manag 2014; 34:938-951. [PMID: 24636007 DOI: 10.1016/j.wasman.2014.02.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Revised: 02/07/2014] [Accepted: 02/12/2014] [Indexed: 06/03/2023]
Abstract
Assessing the strengths and weaknesses of a solid waste management scheme requires an accurate analysis and integration of several determining features. In addition to the technical aspects, any such system shows a complex interaction of actors with varying stakes, decision-making power and influence, as well as a favourable or disabling environment. When capitalizing on the knowledge and experience from a specific case, it is also crucial that experts do not "forget" or underestimate the importance of such social determinants and that they are familiar with the methods and tools to assess them. Social network analysis (SNA) and stakeholder analysis (SA) methods can be successfully applied to better understand actors' role and actions, analyse driving forces and existing coordination among stakeholders, as well as identify bottlenecks in communication which affect daily operations or strategic planning for the future way forward. SNA and SA, appropriately adjusted for a certain system, can provide a useful integration to methods by assessing other aspects to ensure a comprehensive picture of the situation. This paper describes how to integrate SNA and SA in order to survey a solid waste management system. This paper presents the results of an analysis of On-Nuch infectious waste incinerator in Bangkok, Thailand. Stakeholders were interviewed and asked to prioritize characteristics and relationships which they consider particularly important for system development and success of the scheme. In such a way, a large quantity of information about organization, communication between stakeholders and their perception about operation, environmental and health impact, and potential alternatives for the system was collected in a systematic way. The survey results suggest that stakeholders are generally satisfied with the system operation, though communication should be improved. Moreover, stakeholders should be strategically more involved in system development planning, according to their characteristics, to prevent negative reactions.
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Affiliation(s)
- Marco Caniato
- University of Brescia, Research Centre on Appropriate Technologies for Environmental Management in Developing Countries (CeTAmb), Via Branze, 43, 25123 Brescia, Italy.
| | - Mentore Vaccari
- University of Brescia, Research Centre on Appropriate Technologies for Environmental Management in Developing Countries (CeTAmb), Via Branze, 43, 25123 Brescia, Italy.
| | - Chettiyappan Visvanathan
- Asian Institute of Technology (AIT), School of Environment, Resources and Development (SERD), P.O. Box 4, Klong Luang, Pathumthani 12120, Thailand.
| | - Christian Zurbrügg
- University of Brescia, Research Centre on Appropriate Technologies for Environmental Management in Developing Countries (CeTAmb), Via Branze, 43, 25123 Brescia, Italy; Eawag: Swiss Federal Institute of Aquatic Science and Technology, Department of Water and Sanitation in Developing Countries (Sandec), Ueberlandstrasse 133, 8600 Duebendorf, Switzerland.
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