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Ramirez-Vazquez R, Escobar I, Vandenbosch GAE, Arribas E. Personal exposure to radiofrequency electromagnetic fields: A comparative analysis of international, national, and regional guidelines. Environ Res 2024; 246:118124. [PMID: 38199478 DOI: 10.1016/j.envres.2024.118124] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 11/07/2023] [Revised: 12/30/2023] [Accepted: 01/04/2024] [Indexed: 01/12/2024]
Abstract
A worldwide overview and analysis for the existing limits of human exposure to Radiofrequency Electromagnetic Fields (RF-EMF) is given in this paper. These reference levels have been established by different national and even regional governments, which can be based on the guidelines provided by the recommendations of the International Commission on Non-Ionizing Radiation Protection (ICNIRP), the International Committee on Electromagnetic Safety of the Institute of Electrical and Electronics Engineers (IEEE), and even in the United States of the Federal Communications Commission (FCC), as well as, are based on the so-called precautionary principle. Explicit reference is made to the exposure limits adopted in countries or regions, such as Canada, Italy, Poland, Switzerland, China, Russia, France, and regions of Belgium (Brussels, Flanders, Wallonia), where the limits are much lower than the international standards. The limits are compared to a selected set of in-situ measurements. This clearly shows that the measured values are typically very small compared to the international standards but could be somewhat higher compared to the reduced limits. Based on this observation and the reasonable assumption that the sensitivity of people to Electromagnetic Fields (EMF) is the same everywhere (whole-body), we propose the idea to establish a worldwide reference limit for the general public, thus applicable in all countries, if the ICNIRP considers it appropriate. Research must continue to generate measurement data that demonstrate the levels of exposure to which we are really exposed, and with this, provide arguments to the organizations that established the guidelines, especially the ICNIRP, to evaluate whether the current limits are too much. High and can be modified when considered pertinent. To the best of our knowledge, at no time has the reference level for the general public been exceeded.
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Affiliation(s)
- Raquel Ramirez-Vazquez
- University of Castilla-La Mancha, Applied Physics Department, Polytechnic School of Cuenca, University Campus s/n, 16071, Cuenca, Spain; MORFEO Research Group, University of Castilla-La Mancha, Spain; ESAT-WaveCoRE, Dep. of Electrical Engineering, Katholieke Universiteit Leuven, Kasteelpark Arenberg 10, Box 2444, 3001, Leuven, Belgium
| | - Isabel Escobar
- University of Castilla-La Mancha, Applied Physics Department, Faculty of Computer Science Engineering, Avda. de España s/n, University Campus, 02071, Albacete, Spain; MORFEO Research Group, University of Castilla-La Mancha, Spain
| | - Guy A E Vandenbosch
- ESAT-WaveCoRE, Dep. of Electrical Engineering, Katholieke Universiteit Leuven, Kasteelpark Arenberg 10, Box 2444, 3001, Leuven, Belgium
| | - Enrique Arribas
- University of Castilla-La Mancha, Applied Physics Department, Faculty of Computer Science Engineering, Avda. de España s/n, University Campus, 02071, Albacete, Spain; MORFEO Research Group, University of Castilla-La Mancha, Spain.
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Arribas E, Escobar I, Ramirez-Vazquez R. Comment to Mobile Cellular Data and Wi-Fi Use Are Not Associated with Adverse Health Effects by Rabiei et al., Journal of Biomedical Physics and Engineering. J Biomed Phys Eng 2023; 13:577-578. [PMID: 38148958 PMCID: PMC10749415 DOI: 10.31661/jbpe.v0i0.2310-1669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Accepted: 10/15/2023] [Indexed: 12/28/2023]
Affiliation(s)
- Enrique Arribas
- Department of Applied Physics, Faculty of Computer Science Engineering, University of Castilla-La Mancha, Avda. de España s/n, University Campus, Albacete, Spain
- MORFEO Research Group, University of Castilla-La Mancha, Spain
| | - Isabel Escobar
- Department of Applied Physics, Faculty of Computer Science Engineering, University of Castilla-La Mancha, Avda. de España s/n, University Campus, Albacete, Spain
- MORFEO Research Group, University of Castilla-La Mancha, Spain
| | - Raquel Ramirez-Vazquez
- Department of Applied Physics, Faculty of Computer Science Engineering, University of Castilla-La Mancha, Avda. de España s/n, University Campus, Albacete, Spain
- MORFEO Research Group, University of Castilla-La Mancha, Spain
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Ramirez-Vazquez R, Escobar I, Moreno JJH, Martínez-Plaza A, Maffey S, Arribas E. Personal exposure from free Wi-Fi hotspots in downtown Mexico City. Environ Sci Pollut Res Int 2023; 30:91216-91225. [PMID: 37474852 DOI: 10.1007/s11356-023-28839-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Accepted: 07/13/2023] [Indexed: 07/22/2023]
Abstract
In 2019, the Government of Mexico City implemented actions that allowed citizens to approach a free Wi-Fi hotspot, where more than 13000 points have been installed throughout the city. In this work, we present the results of the measurements of personal exposure to Radiofrequency Electromagnetic Fields carried out in Plaza de la Constitución, better known as Zócalo located in the center of Mexico City. The measurements were taken by one of the researchers while walking on a weekday morning and afternoon, in different microenvironments (on the street, on public transport: subway, at the Zócalo, and finally, at home). We also carry out spot measurements in the center of the Zócalo. Subsequently, we carried out a comparative analysis of the different microenvironments, through box plot and violin plot, and we elaborate georeferenced and interpolated maps with intensity levels through the Kriging method, using the Geographic Information System. The Kriging interpolation gives us a good visualization of the spatial distribution of RF-EMF exposure in the study area, showing the highest and lowest intensity levels. The mean values recorded at the measured points in the Zócalo were 326 μW/m2 in the 2.4- to 2.5-GHz Wi-Fi band and 2370 μW/m2 in the 5.15- to 5.85-GHz Wi-Fi band. In the case of the mean values recorded on the street, they were 119 μW/m2 in the 2.4- to 2.5-GHz frequency band and 31.8 μW/m2 in the 5.15- to 5.85-GHz frequency band, like the values recorded at home, 122 μW/m2 and 33.9 μW/m2, respectively. All values are well below the reference levels established by the International Commission on Non-Ionizing Radiation Protection.
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Affiliation(s)
- Raquel Ramirez-Vazquez
- Faculty of Computer Science Engineering, Applied Physics Department, University of Castilla-La Mancha, Avda. de España s/n, University Campus, 02071, Albacete, Spain
- ESAT-WaveCoRE, Department of Electrical Engineering, Katholieke Universiteit Leuven, Kasteelpark Arenberg 10, Box 2444, 3001, Leuven, Belgium
| | - Isabel Escobar
- Faculty of Computer Science Engineering, Applied Physics Department, University of Castilla-La Mancha, Avda. de España s/n, University Campus, 02071, Albacete, Spain
| | - Juan José Hurtado Moreno
- Sección de Estudiantes de Posgrado e Investigación, UPIICSA-Instituto Politécnico Nacional, Mexico City, Mexico
| | - Antonio Martínez-Plaza
- Mathematics Department, School of Industrial Engineering, University of Castilla-La Mancha, Avda. de España s/n, University Campus, 02071, Albacete, Spain
| | | | - Enrique Arribas
- Faculty of Computer Science Engineering, Applied Physics Department, University of Castilla-La Mancha, Avda. de España s/n, University Campus, 02071, Albacete, Spain.
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Arribas E, Escobar I, Martinez-Plaza A, Ramirez-Vazquez R. Comment on Martin L. Pall "Millimeter (MM) wave and microwave frequency radiation produce deeply penetrating effects: the biology and the physics", Rev Environ Health, 2021. Rev Environ Health 2023; 38:193-196. [PMID: 35142146 DOI: 10.1515/reveh-2021-0180] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 12/29/2021] [Accepted: 01/24/2022] [Indexed: 06/14/2023]
Abstract
In this letter, we present some comments related to Pall's publication, in which Pall states that the electric field disappears after a few centimeters and that the magnetic field continues progressing within the studied material.
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Affiliation(s)
- Enrique Arribas
- Applied Physics Department, Faculty of Computer Science Engineering, University of Castilla-La Mancha, Albacete, Spain
| | - Isabel Escobar
- Applied Physics Department, Faculty of Computer Science Engineering, University of Castilla-La Mancha, Albacete, Spain
| | - Antonio Martinez-Plaza
- Mathematics Department, School of Industrial Engineering, University of Castilla-La Mancha, Albacete, Spain
| | - Raquel Ramirez-Vazquez
- Applied Physics Department, Faculty of Computer Science Engineering, University of Castilla-La Mancha, Albacete, Spain
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Ramirez-Vazquez R, Escobar I, Vandenbosch GAE, Vargas F, Caceres-Monllor DA, Arribas E. Measurement studies of personal exposure to radiofrequency electromagnetic fields: A systematic review. Environ Res 2023; 218:114979. [PMID: 36460078 DOI: 10.1016/j.envres.2022.114979] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [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: 09/24/2022] [Revised: 11/26/2022] [Accepted: 11/28/2022] [Indexed: 06/17/2023]
Abstract
The last 25 years have seen an increase in the number of radiofrequency sources with the global adoption of smartphones as primary connectivity devices. The objective of this work was to review and evaluate the measured studies of personal exposure to Radiofrequency Electromagnetic Fields (RF-RMF) and meet the basic quality criteria eligible for inclusion in this Review, according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines, following the eligibility criteria of the PECO (Population, Exposure, Comparator, and Outcome) methodology, and the instrument for critical reading Critical Appraisal Skills Programme Español (CASPe). We systematically reviewed the works published between January 1, 1998, and December 31, 2021, yielding 56 publications. Of the different types of studies in which personal exposure to RF-EMF has been measured with two measurement methodologies can be highlighted: Personal measurements with volunteers and Personal measurements with a trained researcher (touring a specific area, one or several microenvironments, an entire city, walking or in some means of transport). Personal exposimeters were used in 83% of the studies. The lowest mean was measured in Egypt with a value of 0.00100 μW/m2 (1.00 nW/m2) in 2007 and the highest mean was measured in Belgium with a value of 285000 μW/m2 (0.285 W/m2) in 2019. The results of our study confirm that RF-EMF exposure levels are well below the maximum levels established by the ICNIRP guidelines.
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Affiliation(s)
- Raquel Ramirez-Vazquez
- University of Castilla-La Mancha, Applied Physics Department, Faculty of Computer Science Engineering, Avda. de España S/n, University Campus, 02071, Albacete, Spain
| | - Isabel Escobar
- University of Castilla-La Mancha, Applied Physics Department, Faculty of Computer Science Engineering, Avda. de España S/n, University Campus, 02071, Albacete, Spain
| | - Guy A E Vandenbosch
- ESAT-WaveCoRE, Dep. of Electrical Engineering, Katholieke Universiteit Leuven, Kasteelpark Arenberg 10, Box 2444, 3001, Leuven, Belgium
| | | | | | - Enrique Arribas
- University of Castilla-La Mancha, Applied Physics Department, Faculty of Computer Science Engineering, Avda. de España S/n, University Campus, 02071, Albacete, Spain.
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Ramirez-Vazquez R, Escobar I, Martinez-Plaza A, Arribas E. Comparison of personal exposure to Radiofrequency Electromagnetic Fields from Wi-Fi in a Spanish university over three years. Sci Total Environ 2023; 858:160008. [PMID: 36368387 DOI: 10.1016/j.scitotenv.2022.160008] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [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: 08/20/2022] [Revised: 10/28/2022] [Accepted: 11/03/2022] [Indexed: 06/16/2023]
Abstract
In this work we present the personal exposure levels to Radiofrequency Electromagnetic Fields (RF-EMF) from Wireless Fidelity (Wi-Fi) 2.4 GHz and 5.85 GHz bands in a Spanish university, specifically, at the Faculty of Computer Science Engineering at the University of Castilla-La Mancha (Albacete, Spain). We present results from three years, 2017, 2018 and 2019 in the same study place and points; and measurements carried out in 2022 inside a classroom and inside a professor's office, with the aim to compare the measurements and verify compliance with reference levels established by the International Commission on Non-Ionizing Radiation Protection (ICNIRP). The minimum average was 0.0900 μW/m2 in the 2.4 GHz Wi-Fi, in 2019, and the maximum average was 211 μW/m2 in the 5.85 GHz Wi-Fi in 2017, around the building. Comparing the measurements carried out inside the classroom with students and without students, we identified that the maximum value was 278 μW/m2 (classroom with students, in the 5.85 GHz Wi-Fi band) and the minimum value was 37.9 μW/m2 (classroom without students, in the 5.85 GHz Wi-Fi band). Finally, comparing the results of all the measurements (average values) inside the classroom and inside a professor's office, the maximum value was 205 μW/m2 (in the 5.85 GHz Wi-Fi band) inside the classroom with students, and the minimum value was 0.217 μW/m2 inside a professor's office (in the 2.4 GHz Wi-Fi band). These values in no case exceed the limits established by the International Commission on Non-Ionizing Radiation Protection, 10 W/m2 for general public exposure.
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Affiliation(s)
- Raquel Ramirez-Vazquez
- University of Castilla-La Mancha, Applied Physics Department, Faculty of Computer Science Engineering, Avda. de España s/n, University campus, 02071 Albacete, Spain
| | - Isabel Escobar
- University of Castilla-La Mancha, Applied Physics Department, Faculty of Computer Science Engineering, Avda. de España s/n, University campus, 02071 Albacete, Spain
| | - Antonio Martinez-Plaza
- University of Castilla-La Mancha, Mathematics Department, School of Industrial Engineering, Avda. de España s/n, University campus, 02071 Albacete, Spain
| | - Enrique Arribas
- University of Castilla-La Mancha, Applied Physics Department, Faculty of Computer Science Engineering, Avda. de España s/n, University campus, 02071 Albacete, Spain.
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Ramirez-Vazquez R, Escobar I, Vargas F, Arribas E. Comment on: What is the radiation before 5G? A correlation study between measurements in situ and in real time and epidemiological indicators in Vallecas, Madrid, by I. López, N. Félix, M. Rivera, A. Alonso, and C. Maestú. Environ Res 2022; 207:112138. [PMID: 34653414 DOI: 10.1016/j.envres.2021.112138] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 06/02/2021] [Revised: 08/01/2021] [Accepted: 09/25/2021] [Indexed: 06/13/2023]
Abstract
We have read the article recently published by Lopez et al., 2020 (Lopez et al., 2021). This study aimed to find a possible relationship, if any, between exposure to RF-EMF with some health indicators such as sleep, headache, and fatigue collected through surveys, using maximum electromagnetic radiation peak-to-peak measurements. And after a detailed analysis of the study, we want to make some comments on said publication to clarify some aspects.
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Affiliation(s)
- R Ramirez-Vazquez
- University of Castilla-La Mancha, Applied Physics Department, Faculty of Computer Science Engineering, Albacete, Spain.
| | - I Escobar
- University of Castilla-La Mancha, Applied Physics Department, Faculty of Computer Science Engineering, Albacete, Spain
| | - F Vargas
- Ministry of Health, Madrid, Spain
| | - E Arribas
- University of Castilla-La Mancha, Applied Physics Department, Faculty of Computer Science Engineering, Albacete, Spain
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Ramirez-Vazquez R, Escobar I, Franco T, Arribas E. Physical units to report intensity of electromagnetic wave. Environ Res 2022; 204:112341. [PMID: 34740620 DOI: 10.1016/j.envres.2021.112341] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [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: 05/10/2021] [Revised: 10/23/2021] [Accepted: 11/01/2021] [Indexed: 06/13/2023]
Abstract
The aim of this work is to propose a consensus to scientific community that handles personal exposimeters, which measure intensity of an electromagnetic wave (W/m2). To express the intensity of an electromagnetic wave there is a duality in the way of expressing it. Some scientists prefer to use W/m2 while others use V/m, which is a unit of the electric field. There is also a duality in the name, sometimes it is called it power flux density and some other times, wave intensity. We believe that this second name is more appropriate from the point of view of physics. We suggest expressing intensity of an electromagnetic wave in W/m2 instead of giving the value of their electric field which is measured in V/m. There is a quadratic relation between electric field and intensity of the wave, and it is necessary to do a mathematical operation, so in our opinion, it is preferable to use W/m2 which directly gives us the value of the measured intensity. Furthermore, if the intensity is very low, it may be expressed in μW/m2 and with only three significant figures, due to sensitivity of the current exposimeters used.
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Affiliation(s)
- R Ramirez-Vazquez
- University of Castilla-La Mancha, Applied Physics Department, Faculty of Computer Science Engineering, Albacete, Spain.
| | - I Escobar
- University of Castilla-La Mancha, Applied Physics Department, Faculty of Computer Science Engineering, Albacete, Spain
| | - T Franco
- School of Higher Education in Mechanical and Electrical Engineering (ESIME-Zacatenco), Instituto Politecnico Nacional (IPN), Mexico city, Mexico
| | - E Arribas
- University of Castilla-La Mancha, Applied Physics Department, Faculty of Computer Science Engineering, Albacete, Spain
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Ramirez-Vazquez R, Escobar I, Arribas E. Comment on "multivariable quantitative relation between cell viability and the exposure parameters of 9.33 GHz RF-EMP irradiation". Electromagn Biol Med 2021; 41:118-119. [PMID: 34380356 DOI: 10.1080/15368378.2021.1963045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Raquel Ramirez-Vazquez
- Applied Physics Department, Faculty of Computer Science Engineering, University of Castilla-La Mancha, Albacete, Spain
| | - Isabel Escobar
- Applied Physics Department, Faculty of Computer Science Engineering, University of Castilla-La Mancha, Albacete, Spain
| | - Enrique Arribas
- Applied Physics Department, Faculty of Computer Science Engineering, University of Castilla-La Mancha, Albacete, Spain
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Ramirez-Vazquez R, Gonzalez-Rubio J, Escobar I, Suarez Rodriguez CDP, Arribas E. Personal Exposure Assessment to Wi-Fi Radiofrequency Electromagnetic Fields in Mexican Microenvironments. Int J Environ Res Public Health 2021; 18:ijerph18041857. [PMID: 33673014 PMCID: PMC7918906 DOI: 10.3390/ijerph18041857] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 02/05/2021] [Accepted: 02/09/2021] [Indexed: 12/23/2022]
Abstract
In recent years, personal exposure to Radiofrequency Electromagnetic Fields (RF-EMF) has substantially increased, and most studies about RF-EMF with volunteers have been developed in Europe. To the best of our knowledge, this is the first study carried out in Mexico with personal exposimeters. The main objective was to measure personal exposure to RF-EMF from Wireless Fidelity or wireless Internet connection (Wi-Fi) frequency bands in Tamazunchale, San Luis Potosi, Mexico, to compare results with maximum levels permitted by international recommendations and to find if there are differences in the microenvironments subject to measurements. The study was conducted with 63 volunteers in different microenvironments: home, workplace, outside, schools, travel, and shopping. The mean minimum values registered were 146.5 μW/m2 in travel from the Wi-Fi 2G band and 116.8 μW/m2 at home from the Wi-Fi 5G band, and the maximum values registered were 499.7 μW/m2 and 264.9 μW/m2 at the workplace for the Wi-Fi 2G band and the Wi-Fi 5G band, respectively. In addition, by time period and type of day, minimum values were registered at nighttime, these values being 129.4 μW/m2 and 93.9 μW/m2, and maximum values were registered in the daytime, these values being 303.1 μW/m2 and 168.3 μW/m2 for the Wi-Fi 2G and Wi-Fi 5G bands, respectively. In no case, values exceeded limits established by the International Commission on Non-Ionizing Radiation Protection (ICNIRP). Of the study participants (n = 63), a subgroup (n = 35) answered a survey on risk perception. According to these results, the Tamazunchale (Mexico) population is worried about this situation in comparison with several European cities; however, the risk perception changes when they are informed about the results for the study.
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Affiliation(s)
- Raquel Ramirez-Vazquez
- Applied Physics Department, Faculty of Computer Science Engineering, University of Castilla-La Mancha, Avda. de España s/n, Campus Universitario, 02071 Albacete, Spain; (I.E.); (E.A.)
- Correspondence:
| | - Jesus Gonzalez-Rubio
- Medical Science Department, School of Medicine, University of Castilla-La Mancha, C/Almansa 14, 02071 Albacete, Spain;
| | - Isabel Escobar
- Applied Physics Department, Faculty of Computer Science Engineering, University of Castilla-La Mancha, Avda. de España s/n, Campus Universitario, 02071 Albacete, Spain; (I.E.); (E.A.)
| | - Carmen del Pilar Suarez Rodriguez
- Department of Mechanical Engineering, Autonomous University of San Luis Potosi, Academic Coordination of the Huasteca South Region, Tamazunchale, San Luis Potosi 79960, Mexico;
| | - Enrique Arribas
- Applied Physics Department, Faculty of Computer Science Engineering, University of Castilla-La Mancha, Avda. de España s/n, Campus Universitario, 02071 Albacete, Spain; (I.E.); (E.A.)
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Ramirez-Vazquez R, Arabasi S, Al-Taani H, Sbeih S, Gonzalez-Rubio J, Escobar I, Arribas E. Georeferencing of Personal Exposure to Radiofrequency Electromagnetic Fields from Wi-Fi in a University Area. Int J Environ Res Public Health 2020; 17:ijerph17061898. [PMID: 32183369 PMCID: PMC7142519 DOI: 10.3390/ijerph17061898] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 03/07/2020] [Accepted: 03/09/2020] [Indexed: 12/13/2022]
Abstract
In the last two decades, due to the development of the information society, the massive increase in the use of information technologies, including the connection and communication of multiple electronic devices, highlighting Wi-Fi networks, as well as the emerging technological advances of 4G and 5G (new-generation mobile phones that will use 5G), have caused a significant increase in the personal exposure to Radiofrequency Electromagnetic Fields (RF-EMF), and as a consequence, increasing discussions about the possible adverse health effects. The main objective of this study was to measure the personal exposure to radiofrequency electromagnetic fields from the Wi-Fi in the university area of German Jordanian University (GJU) and prepare georeferenced maps of the registered intensity levels and to compare them with the basic international restrictions. Spot measurements were made outside the university area at German Jordanian University. Measurements were made in the whole university area and around two buildings. Two Satimo EME SPY 140 (Brest, France) personal exposimeters were used, and the measurements were performed in the morning and afternoon, and on weekends and weekdays. The total average personal exposure to RF-EMF from the Wi-Fi band registered in the three study areas and in the four days measured was 28.82 μW/m2. The average total exposure from the Wi-Fi band registered in the ten measured points of the university area of GJU was 22.97 μW/m2, the one registered in the eight measured points of building H was 34.48 μW/m2, and the one registered in the eight points of building C was 29.00 μW/m2. The maximum average values registered in the campus of GJU are below the guidelines allowed by International Commission on Non-ionizing Radiation Protection (ICNIRP). The measurement protocol used in this work has been applied in measurements already carried out in Spain and Mexico, and it is applicable in university areas of other countries.
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Affiliation(s)
- Raquel Ramirez-Vazquez
- Applied Physics Department, Faculty of Computer Science, Engineering, University of Castilla-La Mancha, Avda. de España s/n, Campus Universitario, 02071 Albacete, Spain; (R.R.-V.); (I.E.)
| | - Sameer Arabasi
- School of Basic Sciences and Humanities, German Jordanian University, Amman Madaba Street, P.O. Box 35247, Amman 11180, Jordan; (S.A.); (H.A.-T.); (S.S.)
| | - Hussein Al-Taani
- School of Basic Sciences and Humanities, German Jordanian University, Amman Madaba Street, P.O. Box 35247, Amman 11180, Jordan; (S.A.); (H.A.-T.); (S.S.)
| | - Suhad Sbeih
- School of Basic Sciences and Humanities, German Jordanian University, Amman Madaba Street, P.O. Box 35247, Amman 11180, Jordan; (S.A.); (H.A.-T.); (S.S.)
| | - Jesus Gonzalez-Rubio
- Medical Science Department, School of Medicine, University of Castilla-La Mancha, C/ Almansa 14, 02071 Albacete, Spain;
| | - Isabel Escobar
- Applied Physics Department, Faculty of Computer Science, Engineering, University of Castilla-La Mancha, Avda. de España s/n, Campus Universitario, 02071 Albacete, Spain; (R.R.-V.); (I.E.)
| | - Enrique Arribas
- Applied Physics Department, Faculty of Computer Science, Engineering, University of Castilla-La Mancha, Avda. de España s/n, Campus Universitario, 02071 Albacete, Spain; (R.R.-V.); (I.E.)
- Correspondence:
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Najera A, Ramirez-Vazquez R, Arribas E, Gonzalez-Rubio J. Comparison of statistic methods for censored personal exposure to RF-EMF data. Environ Monit Assess 2020; 192:77. [PMID: 31897614 DOI: 10.1007/s10661-019-8021-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 05/24/2019] [Accepted: 12/09/2019] [Indexed: 06/10/2023]
Abstract
Several studies have characterized personal exposure to RF-EMF, which allows possible effects on health to be studied. All equipment has a detection limit, below which we obtain nondetects or censored data. This problem is a challenge for researchers as it makes the analysis of such data complex. We suggest reconsidering the statistical protocols of the nondetects analysis by comparing four different methods. Three of them substitute censored data using different approaches: regression on order of statistics (ROS) to simulate data below the detection limit (Method 1), substituting nondetect values by the detection limit divided by 2 (Method 2), a naïve calculation (Method 3) using the detection limit as a valid measurement. The fourth method consists of considering censored data to be missing values (Method 4). This article examines how these methods affect the quantification of personal exposure. We considered data from 14 frequency bands from FM to WiMax measured in Albacete (Spain) for 76 days every 10 s by a personal exposimeter (PEM) Satimo EME Spy 140.Methods 3 and 2 gave similar mean and median values to Method 1, but both underestimated the mean values when high nondetects records occurred, which conditioned the physical description of the real situation. The mean values calculated by Method 4 differed from those obtained by Method 1 but were similar when the percentage of nondetects was below 20%.Our comparison suggests that nondetects can be neglected when the percentage of censored data is low to provide a more realistic physical situation.
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Affiliation(s)
- Alberto Najera
- Faculty of Medicine, University of Castilla-La Mancha, Albacete, Spain
| | | | - Enrique Arribas
- Department of Applied Physics, University of Castilla-La Mancha, Albacete, Spain
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Ramirez-Vazquez R, Gonzalez-Rubio J, Arribas E, Najera A. Personal RF-EMF exposure from mobile phone base stations during temporary events. Environ Res 2019; 175:266-273. [PMID: 31146098 DOI: 10.1016/j.envres.2019.05.033] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 01/16/2019] [Revised: 05/16/2019] [Accepted: 05/17/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND In recent years, radiofrequency electromagnetic fields (RF-EMF) exposure has increased owing to new communication technologies. Simultaneously, increased exposure to RF-EMF has led to society's growing concern about the possible effects they may have on human health. Many studies have described personal RF-EMF exposure by using personal exposimeters to know a population's daily exposure to mobile phone base stations and to other sources whose installations tend to be permanent. Nonetheless during special events like concerts or fairs, where many people gather, permanent installations might not suffice to cover demand. So telephone companies install temporary stations for these events, and modify the exposure pattern of these areas or populations. OBJECTIVE To study if installing temporary antennae for large events, and high concentrations of mobile phones, modify the exposure pattern compared to usual situations. METHODS Personal RF-EMF exposure from mobile phones (uplink) and mobile phone base stations (downlink) installed at the 2017 Albacete Fair (Spain) was recorded. Between 7 and 17 September, more than 2,500,000 people visited this Fair. Measurements were taken by two Satimo EME SPY 140 personal exposimeters, placed one each side of a research team member's waist. These exposimeters were programmed to take measurements every 4 s at different time of day; morning, afternoon and night; and in several places, around the Fair Enclosure (zones Ejidos and Paseo) and inside the enclosure (Interior). These measurements were repeated on a weekday, at the weekend and the day after the Fair ended after temporary base stations had been removed. They were also taken for 1 h in all three zones, for each time of day; that is, 9 h were recorded for each study day. RESULTS The mean RF-EMF recorded exposure from base stations (downlink-DL) on the days the Fair opened (morning, afternoon and night) for the three studied zones was 791.8 μW/m2, while the exposure produced by mobile phones (uplink-UL) was 59.0 μW/m2. These values were 391.2 μW/m2 (DL) and 10.3 μW/m2 (UL) a few days after the event ended. In study zones Ejidos and Paseo, both outside, the highest mean exposure was recorded at the weekend as 1494.1 and 848.1 μW/m2 respectively. For the Interior zone, the mean value recorded during the Fair was 354.8 μW/m2. These values contrast with those recorded in the three zones after the event ended: 556.37 (Ejidos), 144.1 (Paseo); 473.21 μW/m2 (Interior). The fact that the mean exposure recorded at Interior was slightly higher after the Fair could be due to signal shielding by so many people. The reduction in exposure in Paseo after the Fair was outstanding, probably due to the antennae being placed on low towers. Major differences were also found in the RF-EMF exposure from UL. In this case, the weekend values taken during the Fair were between 28.2 μW/m2 at Interior (weekday) and 98.1 μW/m2 at Ejidos (weekend), which dropped to 5.5 at Paseo after the Fair, to 11.7 μW/m2 at Interior and to 13.6 μW/m2 at Ejidos. CONCLUSIONS Installing mobile phone base stations, and a dense public using mobile phones, imply a significant increase in personal RF-EMF exposure compared to that recorded during normal periods in the same area. However, the recorded measurements were below legally established limits.
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Affiliation(s)
| | - Jesus Gonzalez-Rubio
- Medical Sciences, University: University of Castilla-La Mancha, Albacete, Spain.
| | - Enrique Arribas
- Applied Physics, University of Castilla-La Mancha, Albacete Spain.
| | - Alberto Najera
- Medical Sciences, University of Castilla-La Mancha, Albacete, Spain.
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Ramirez-Vazquez R, Gonzalez-Rubio J, Arribas E, Najera A. Characterisation of personal exposure to environmental radiofrequency electromagnetic fields in Albacete (Spain) and assessment of risk perception. Environ Res 2019; 172:109-116. [PMID: 30782530 DOI: 10.1016/j.envres.2019.02.015] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [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: 06/21/2018] [Revised: 01/18/2019] [Accepted: 02/11/2019] [Indexed: 05/16/2023]
Abstract
In the last decades, exposure to radiofrequency electromagnetic fields (RF-EMF) has substantially increased as new wireless technologies have been introduced. Society has become more concerned about the possible effects of RF-EMF on human health in parallel to the increase in their exposure. The appearance of personal exposimeters opens up wide-ranging research possibilities. Despite studies having characterised personal exposure to RF-EMF, part of the population is still worried, to the extent that psychogenic diseases ("nocebo" effect) appear, and patients suffer. It could be interesting to share personal exposure results with the population to better understand and promote public health. The main objective was to characterise personal exposure to environmental RF-EMF in Albacete (166,000 inhabitants, SE Spain), and assess the effect of sharing the results of the study on participants' risk perception. Measurements were taken by a personal Satimo EME SPY 140 exposimeter, which was programmed every 10 s for 24 h. To measure personal exposure to RF-EMF, we worked with 75 volunteers. Their personal exposure, 14 microenvironments in the city, e.g., home, outdoors, work, etc., and possible time differences were analysed. After participating in the study, 35 participants completed a questionnaire about their RF-EMF risk perception, which was also answered by a control sample to compare the results (N = 36). The total average exposure of 14 bands was 37.7 μW/m2, and individual ranges fell between 0.2 μW/m2, recorded in TV4&5, and a maximum of 264.7 μW/m2 in DECT. For Friday, we recorded a mean of 53.9 μW/m2 as opposed to 23.4 μW/m2 obtained on Saturday. The recorded night-time value was 27.5 μW/m2 versus 43.8 μW/m2 recorded in the daytime. The mean personal exposure value also showed differences between weekdays and weekend days, with 39.7 μW/m2 and 26.9 μW/m2, respectively. The main source that contributed to the mean total personal exposure was enhanced cordless telecommunications (DECT) with 50.2%, followed by mobile phones with 18.4% and mobile stations with 11.0% (GSM, DCS and UMTS), while WiFi signals gave 12.5%. In the analysed microenvironments, the mean exposure of homes and workplaces was 34.3 μW/m2 and 55.2 μW/m2, respectively. Outdoors, the mean value was 34.2 μW/m2 and the main sources were DECT, WiFi and mobile phone stations, depending on the place. The risk perception analysis found that 54% of the participants perceived that RF-EMF were less dangerous than before participating in the study, while 43% reported no change in their perceptions. Only 9% of the volunteers who received information about their measurements after the study assessed the possible RF-EMF risk with a value over or equal to 4 (on a scale from 1 to 5) versus 39% of the non-participant controls. We conclude that personal exposure to RF-EMF fell well below the limits recommended by ICNIRP and showed wide temporal and spatial variability. The main exposure sources were DECT, followed by mobile phones and WiFi. Sharing exposure results with participants lowered their risk perception.
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Affiliation(s)
| | | | - Enrique Arribas
- Applied Physics, University of Castilla-La Mancha, Albacete, Spain.
| | - Alberto Najera
- Medical Sciences, University of Castilla-La Mancha, Albacete, Spain.
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Arribas E, Ramirez-Vazquez R, Escobar I. Comment on "Wi-Fi is an important threat to human health". Environ Res 2018; 167:639. [PMID: 30173116 DOI: 10.1016/j.envres.2018.08.029] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Accepted: 08/23/2018] [Indexed: 06/08/2023]
Affiliation(s)
- Enrique Arribas
- Applied Physics Department, Faculty of Computer Science Engineering, University of Castilla-La Mancha, Avda de España s/n, Campus Universitario, 02071 Albacete, Spain.
| | - Raquel Ramirez-Vazquez
- Applied Physics Department, Faculty of Computer Science Engineering, University of Castilla-La Mancha, Avda de España s/n, Campus Universitario, 02071 Albacete, Spain
| | - Isabel Escobar
- Applied Physics Department, Faculty of Computer Science Engineering, University of Castilla-La Mancha, Avda de España s/n, Campus Universitario, 02071 Albacete, Spain
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Gonzalez-Rubio J, Arribas E, Ramirez-Vazquez R, Najera A. Response to the comments on "Radiofrequency electromagnetic fields and some cancers of unknown etiology: An ecological study" by J. Gonzalez-Rubio, E. Arribas, R. Ramirez-Vazquez and A. Najera. Science of the Total Environment 599-600 (2017) 834-843. Sci Total Environ 2018; 612:368-369. [PMID: 28858746 DOI: 10.1016/j.scitotenv.2017.08.152] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2017] [Revised: 08/11/2017] [Accepted: 08/15/2017] [Indexed: 06/07/2023]
Affiliation(s)
| | - Enrique Arribas
- Applied Physics, University of Castilla-La Mancha, Albacete, Spain.
| | | | - Alberto Najera
- Medical Sciences, University of Castilla-La Mancha, Albacete, Spain.
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Gonzalez-Rubio J, Arribas E, Ramirez-Vazquez R, Najera A. Radiofrequency electromagnetic fields and some cancers of unknown etiology: An ecological study. Sci Total Environ 2017; 599-600:834-843. [PMID: 28499231 DOI: 10.1016/j.scitotenv.2017.05.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Accepted: 05/02/2017] [Indexed: 06/07/2023]
Abstract
Simultaneously with the increase of Radiofrequency Electromagnetic Fields (RF-EMF) in recent decades, there has been increasing concern about their potential relation with the etiology of several tumors. At this time, the techniques of spatial data analysis jointly with the study of the personal exposure to these fields offer a new approach to the problem. This paper presents the results of a preliminary epidemiological study, combining Epidemiology, Statistics and Geographical Information Systems (GIS), in which we analyzed the correlation between exposure to RF-EMF in the city of Albacete (166,000 inhabitants, southeast Spain) and the incidence of several cancers with unspecific causes (lymphomas, and brain tumors). We used statistical tools to analyze the spatial point patterns and aggregate data with the aim to study the spatial randomness and to determine the zones with the highest incidence from 95 tumors studied (65 lymphomas, 12 gliomas and 18 meningiomas). We also perform a correlation (Spearman) study between the personal exposure to RF-EMF in 14 frequency bands, recorded by an EME Spy 140 (Satimo) exposimeter in the city's administrative regions, and the incidence of the tumors registered from January 2012 to May 2015. The studied cancer cases have a random spatial distribution inside the city. On the other hand, and by means of an ecological study, we verified that the exposure to RF-EMF registered in the city of Albacete shows little correlation with the incidence of the studied tumors (gliomas (ρ=0.15), meningiomas (ρ=0.19) and lymphomas (ρ=-0.03)). The proposed methodology inaugurates an unexplored analysis path in this field.
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Affiliation(s)
- Jesus Gonzalez-Rubio
- Department of Medical Sciences, University of Castilla-La Mancha, Albacete, Spain.
| | - Enrique Arribas
- Department of Applied Physics, University of Castilla-La Mancha, Albacete, Spain.
| | | | - Alberto Najera
- Department of Applied Physics, University of Castilla-La Mancha, Albacete, Spain.
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