Modeling the Socioeconomic Metabolism of End-of-Life Tires Using Structural Equations: A Brazilian Case Study
, Jorge Laureano Moya Rodriguez, Salvador Ávila Filho and Adonias Magdiel Silva FerreiraRound 1
Reviewer 1 Report
see the attached PDF with indications
Comments for author File: 
Comments.pdf
Author Response
Answers to reviewer 1:
- Q -Add references and example of tools
Answer: The following text was added in the second paragraph of the Introduction and new references were added:
“… the use of effective tools for public solid waste management has been necessary to minimize environmental and public health impacts. These tools comprise regression analysis, Geographic Information System-Based methods, Descriptive statistics and inferential statistic (Ghinea, Drăgoi et al. 2016, Kallel, Serbaji et al. 2016, Srivastava and Jamwal 2019, Zouboulis and Peleka 2019), among others…”
- Q - add also the following references:
Fan, Y.V., Klemeš, J.J., Walmsley, T.G., Bertók, B., 2020. Implementing Circular Economy in municipal solid waste treatment system using P-graph, Science of the Total Environment, 701,134652
Ferronato, N., Rada, E.C., Gorritty Portillo, M.A., Cioca, L.I., Ragazzi, M., Torretta, V., 2019. Introduction of the circular economy within developing regions: A comparative analysis of advantages and opportunities for waste valorization, Journal of Environmental Management, 230, pp. 366-378.
Ferronato, N., Torretta, V., Ragazzi, M., Rada, E.C., 2017. Waste mismanagement in developing countries: A case study of environmental contamination, UPB Scientific Bulletin, Series D: Mechanical Engineering, 79(3), pp. 185-196
Ziraba, A.K., Haregu, T.N., Mberu, B., 2016. A review and framework for understanding the potential impact of poor solid waste management on health in developing countries, Archives of Public Health, 74(1),55
Cocarta, D.M., Rada, E.C., Ragazzi, M., Badea, A., Apostol, T., 2009. A contribution for a correct vision of health impact from municipal solid waste treatments, Environmental Technology, 30(9), pp. 963-968.
Answer: The following references were added in the new version of the manuscript:
(Cocarta, Rada et al. 2009, Ziraba, Haregu et al. 2016, Ferronato, Torretta et al. 2017, Ferronato, Rada et al. 2019, Van Fan, Klemeš et al. 2020).
- Q – Add Examples and references
Answer: The following changes were made to the text and new references were added:
“Groundwater contamination represents one of the main environmental impacts caused by solid waste (i.e. dissolved solids, leakage of leachate, etc) (Aderemi, Oriaku et al. 2011, Han, Ma et al. 2016, Chen, Sun et al. 2019, Yousefloo and Babazadeh 2020)…”
- Q - Explain to which case- study refers
Answer: It is a general consideration and does not refer to any specific case.
- Q -Add also the following references:
Cecchin, A., Lamour, M., Joseph Maks Davis, M., Jácome Polit, D., 2011. End-of-life product management as a resilience driver for developing countries: A policy experiment for used tires in Ecuador, Journal of Industrial Ecology, 23(5), pp. 1292-1310
Felix, A.I., Ajayi, O.O., Oyawale, F.A., Akinlabi, S.A., 2018. Sustainable end-of-life tyre (EOLT) management for developing countries - A review, Proceedings of the International Conference on Industrial Engineering and Operations Management, pp. 1054-1064
Torretta, V., Rada, E.C., Ragazzi, M., Turlli, E., Istrate, I.A., Cioca, L.I., 2015. Treatment and disposal of tyres: Two EU approaches. A review, Waste Management, 45, pp. 152-160
Rada, E.C., Ragazzi, M., Dal Maschio, R., Ischia, M., Panaitescu, V.N., 2012., Energy recovery from tyres waste through thermal option, UPB Scientific Bulletin, Series D: Mechanical Engineering, 74(4), pp. 201-210
Stanojević, D.D., Rajković, M.B., Tošković, D.V., 2011., Management of used tyres, accomplishments in the world, and situation in Serbia , Hemijska Industrija, 65(6), pp. 727-738
Answer: The following references were added in the new version of the manuscript:
(Ishola Felix, Ajayi Oluseyi et al. , Stanojević, Rajković et al. 2011, Rada, Ragazzi et al. 2012, Torretta, Rada et al. 2015, Cecchin, Lamour et al. 2019).
- Q- Transfers this chapter in a Table
Answer: The authors have to disagree with the reviewer. Section 2 is not restricted to a citation of works focused on SEM which can be briefly placed in a table. In addition to presenting the concepts involved in SEM, section 2 discusses works in the literature addressing the methods adopted, the type of problem, limitations and important results for the definition of the developed model.
- Q- To many references update them and live only the ones connected with the research presented in the paper.
Answer: All references presented in the manuscript are properly cited and are part of the arguments necessary to justify the proposed model (Figure 1).
Author Response File: 
Author Response.docx
Reviewer 2 Report
Although paper is well-structured, easy to read, corellation analysis is well substantiated some issues are important to consider in my opinion.
1.The general public survey is the major method of the study so the results you describe rahter explain the correlations in public perception of the model constructs then their real inderdependance. For me it means that discussion and conclusions should be different.
2.It is necessary to explain why different variables could be united as one construct in the model. For example, SDF is probably could not be one construct of the model but several different factors that could be or less important. Maybe, it could explain the correlation analysis results.
Author Response
REVIEWER 2
Q- 1. The general public survey is the major method of the study so the results you describe rather explain the correlations in public perception of the model constructs then their real interdependence. For me it means that discussion and conclusions should be different.
Answer: The following paragraph was added at the end of conclusions:
“The general public survey is the major method of the study so the results besides describe the correlations in public perception of the model constructs and their real interdependence.
In addition, the perception of the target audience may change in other field research, depending on the socioeconomic situation or different socioeconomic structures. However, the initial assumptions of sample planning must be reassessed to replicate the proposed method.”
Q- 2. It is necessary to explain why different variables could be united as one construct in the model. For example, SDF is probably could not be one construct of the model but several different factors that could be or less important. Maybe, it could explain the correlation analysis results.
Answer: Different variables can be grouped in the same construct as long as there is a correlation between them. This correlation is measured through the variances obtained in the research carried out with the target audience (which is in accordance with the answer to the previous question).
In general, the Socio Demographic Factors (SDF) and the behavior of society in relation to the reuse of materials through reverse logistics (RMF) represent the explanatory variables of the modeling. Both are evaluated in the SEF because each has an effect on the SEMw measurement. The SDF shows that in the long run, society's decisions regarding the consumption of new tires will have a greater or lesser impact on SEMw. On the other hand, the level of environmental understanding of society, consumption relations determined by income and socioeconomic factors can affect RMF and DMF.
Author Response File: Author Response.docx
