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Showing 6 results for Raei
Survey the Amount of Heavy Metals in Cultural Vegetables in  Suburbs of Shahroud
S Nazemi, A.r Asgari, M Raei,
Volume 3, Issue 2 (6 2010)
Abstract

Backgrounds and Objectives : Vegetables are one of the most important components of daily food. Contamination of vegetables with heavy metals might ends to accumulate in the body, there for in this study the level of lead, chromium, cadmium, arsenic and zinc in cultural vegetables of shahroud suburb were measured in 1387.
Materials and Methods : In this cross-sectional descriptive study, 150 vegetable samples through 3 months, 50 for each month, were randomly harvested. Atomic absorption instrument was used to determine the amount of mentioned heavy metals after sample preparation, SPSS whit 0.05 was used for statistically data analyzing.
Results : For vegetables the average value of Pb, Cr and Cd in different vegetables were different from each other and P value was less than<0.001. There are no significant amounts of Arsenic concentration. The value of these metals with 95% acceptable level was in the range of satisfaction. Arsenic didn&apost have that much of error of its contamination
Conclusion : Except Zn and As other metals like Cr, Cd and Pb were above the standard zone by FAO&WHO. The wastewaters of urban and industrial facilities are the main reason for this problem.The best suggestion is using pure water for this purpose.


Distribution Survey of Electric and Magnetic Field intensity  at a High Voltage Electricity Post in Zanjan City  using GIS Technology
Faramarz Majidi, Somaieh Alavi, Reza Azimi Pirsaraei, Abdollah Heidary, Farhad Asgari,
Volume 5, Issue 3 (21 2012)
Abstract
MicrosoftInternetExplorer4 Background and Objectives: Electric and magnetic fields in the workplace are one of the detrimental factors of power plants, transmission lines, electrical wires, and electrical equipments, therefore, exposure to these fields might be harmful for human health. This study aimed to provide information about intensity of the electromagnetic fields at the high voltage electricity posts and its comparison with the threshold limit value (TLV). 
Materials and Methods: The study was conducted at one of the high voltage electricity post in Zanjan City having 63, 230, and 400 KV power transmission lines. After identifying  stations and measuring the intensity of these fields, GIS maps were prepared and the values were compared with permissible values.
Results: The measured magnetic flux density at different parts of the high voltage post showed that the lowest and  highest intensity were 1.69 and 153.7 mG respectively which were lower than the ACGIH TLVs.The lowest and  highest intensity of the electric field  were 0.008 and 38.07 KV/m respectively. The highest value belonged to the 400 KV line, which exceeds the recommended ACGIH TLV (25 KV/m).
Conclusion: According to the results, the magnetic field intensity was below the TLVs, but the intensity of electric field measured in the 400 KV line was greater  than its TLVs. Thus, the strategies and recommendations for reducing exposure should be taken.

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Assessing Awareness of Rice Farmers of Sari County about Impacts of Usage of Pesticides and its Health Risk in Cropping Year 2015
Ghh Abdollahzadeh, M Sharif Sharifzadeh, Z Qadami Amraei,
Volume 9, Issue 4 (3-2017)
Abstract

Background and Objective: Chemical pesticides are considered a vital component of farming and play a substantial role in maintaining high agricultural productivity. Concerns regarding the health and environmental effects of the pesticides have been increased in recent years. Therefore, this research aimed to assess farmers’ awareness about the positive and negative impacts of pesticides and their health risk on human.

Materials and Methods: A survey study was carried out between two groups of farmers including chemical pesticide users (n= 126) and biological pesticide users (n = 98). The users were randomly selected from 20 villages. The studied villages were selected from two sub-districts by cluster sampling method. An expert-verified questionnaire that its design and contents were assessed by local professionals was used in this research. The reliability of the questionnaire was confirmed based on the calculated Cronbach Alpha Coefficient for two constructs of awareness: positive (0.75) and negative (0.83) impacts of pesticides.

Results: Results indicated that the farmers using biological control were well aware of the harmful impacts of pesticide and hence they used less pesticides than the chemical pesticide users. Although the two groups of the farmers highlighted the health impacts of chemical pesticides such as human and animal health threat, and pollution of surface and underground water, the users of biological control methods had more concerns in this regards. Most of the respondents stated that the pesticides caused serious health problems such as exhaustion, sweating, cough and headache, dizziness, skin inflammation and irritation, nausea and vomiting.

Conclusion: Even though the farmers were well aware of the impacts of pesticides use, they have less often used personal protective equipment. In order to promote farmers’ awareness of pesticide impacts, more efforts are needed to strengthen training programs and facilitate access to extension services.


Evaluation of solar ultraviolet radiation in Zanjan city using the ultraviolet index
Maryam Abdi, Seyed Reza Azimi Pirsaraei, Mohammad Reza Mohammadizadeh,
Volume 14, Issue 1 (5-2021)
Abstract
Background and Objective: Monitoring the amount of ultraviolet radiation from sunlight can provide a basis for assessing people's exposure, raise public awareness and warn people against this radiation. Measuring the sun's ultraviolet index over a working period is an accurate choice to achieve this goal.
Materials and Methods: In this study, the amount of solar UV index in one of the outdoor locations of Zanjan city was measured using Solarmeter model 5.6 UV index meter for one year period. Measurements were performed from 9 am to 5 pm every 30 minutes in direct sunlight in even days for one year period (2018-2019). Finally, the results were analyzed using Excel software.
Results: The highest value of the maximum daily UV index was related to July, with an average value of 11.87 ± 0.649; while, the lowest value of the maximum daily UV index obtained in January, with an average value of 2.23 ± 0.944. In most months of the year, except for late November, December, January and cloudy days, the average value of the maximum daily UV index around noon exceeds the UV index alert threshold set by the World Health Organization (WHO). Even for the safe time period during spring and summer, the average UV index can exceed the UV index warning threshold.
Conclusion: Determining the intensity of the sun's hourly UV radiation is important and necessary to increase the peoples’ and workers’ awareness working in the open environment, as well as to plan for protective measures in any place, especially in Zanjan.

Concentration of potentially toxic elements in black tea imported to Iran: a potential risk assessment study
Gholamali Javedan, Hamid Reza Ghaffari, Zoha Heidarinejad, Nahid Zeraei, Somayeh Hoseinvandtabar, Fateme Pourramezani, Mehrdad Ahmadi,
Volume 15, Issue 1 (4-2022)
Abstract
Background and Objective: The aim of this study was to investigate the concentration of potentially toxic elements (arsenic, lead, copper, cadmium and mercury) in black tea imported to southern Iran and to assess the risk of carcinogenic and non-carcinogenic exposure to consumers.
Materials and Methods: For this purpose, 94 samples of black tea from 15 brands imported from India in 2021 were selected. Heavy metals concentrations were measured using an atomic absorption spectrometer (GBC model SAVANTAA). After determining the concentration of heavy metals in black tea samples, health risk assessment was determined using Montocarlo simulation technique.
Results: According to the results, the average concentrations of heavy metals namely arsenic, lead, copper, cadmium and mercury were 0.03±0.02, 0.02±0.16, 15.67±7.69, 0.02±0.01 and 0.006±0.005 mg/kg, respectively. The hazard quotient (HQ) of the heavy metals arsenic, lead, copper, cadmium and mercury were 1.07×10-2, 6.37×10-3, 3.45×10-5, 2.05×10-2 and 7.19×10-4, respectively.
Conclusion: Therefore, according to the findings, it can be concluded that the concentrations of potentially toxic elements (arsenic, lead, copper, mercury and cadmium) in black tea were consistent with the standard level of Iran and World Health Organization. Additionally, the average carcinogenic risk index for arsenic metal was 4.49×10-6, which is much lower than the acceptable level of carcinogenic risk (10-6). Therefore, the concentrations of five potentially toxic elements in the studied black tea did not show any significant risk for consumers.
 

Risk management model-based HSE system for mineral spas
Taha Mohammadhoseini, Hossein Saadati, Gebraeil Nasl Saraji ,
Volume 15, Issue 4 (3-2023)
Abstract
Background and Objective: Considering the significant number of injured people in spas, the main goal of this research is to provide a model for measuring and managing risk in spas.
Materials and Methods: To prepare the conceptual model of risk, four steps were taken, which include determining the general outline of the model, identifying the parameters, evaluating and scoring the parameters based on the questionnaire, using the hierarchical analysis method, and evaluating and determining the final risk of the pools. According to the allowed standard range of each parameter, five ranges for each parameter were obtained based on the obtained weights, health, safety and environmental risk classes. Finally, by summing up these parameters, the final score of the risk of using each pool is obtained. In order to evaluate the presented model, the risk value of hot mineral water pools in Ardabil province was obtained with the innovative method of this research.
Results: According to the results, according to the risk score, Gutursoi and Gamish-Goli spas have an unacceptable risk level, while Qainarjeh, Shabil, Barjelo and Sablan spas are at a high-risk level.
Conclusion: The presented model was validated with the evidence of forensic events. According to the results of the conceptual model of risk and the score obtained for each component and sub-components, appropriate solutions were presented, including the need to modify the current standards in each spa.

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