Masoud Yousefi; Kourosh Rahmani; Reza Jalilzadeh Yengejeh; Sima Sabzalipour; Gholamreza Goudarzi
Abstract
Background: The production and consumption of pharmaceutical compounds, including antibiotics, and their entry into the environment have raised concerns for experts. It is important to find appropriate methods for treatment of these pollutants from aquatic environments. In this study, nano-persulfate ...
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Background: The production and consumption of pharmaceutical compounds, including antibiotics, and their entry into the environment have raised concerns for experts. It is important to find appropriate methods for treatment of these pollutants from aquatic environments. In this study, nano-persulfate process using green synthesis of zero iron nanoparticles was used in decomposition of the antibiotic Metronidazole (MNZ). Methods: In this study, first, zero iron nanoparticles were synthesized using oak leaves. Then, the characteristics of these nanoparticles were determined using electronic images such as SEM, and TEM. In the experimental part of the study, the effect of operating conditions such as nZVI dosage, persulfate concentration and pH of the PS/nZVI process on degradation of MNZ in aqueous solution Was examined. Results: The results of this study showed that the PS/nZVI process had an acidic nature for removal of MNZ. The optimal conditions for this process were: the dosage of nZVI was 1.8 g/l, the concentration of persulfate was 1.5 mg/l, and pH was 3 for the degradation of 50 mg/l MNZ at contact time of 90 min. The maximum MNZ removal efficiency using PS / NZVI process was about 98.4 % in these conditions. Conclusion: It can be concluded that the synthesis of green zero iron nanoparticles is an economical and environmentally friendly method that can be used to remove MNZ from aqueous solutions.
Masoud Yousefi; Nasrin Razmjoee; Ebrahim Rahimi; Mohammad Ansarizadeh; Kourosh Rahmani
Abstract
Background: Iran is among the top ten disaster-prone countries in the world because of its size, geographical location, and climatic diversity. Practically, the healthcare sector is an active part in disaster management and an integral part of the national health plan. This study aimed to determine the ...
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Background: Iran is among the top ten disaster-prone countries in the world because of its size, geographical location, and climatic diversity. Practically, the healthcare sector is an active part in disaster management and an integral part of the national health plan. This study aimed to determine the preparedness of the personnel to cope with natural disasters in Valiasr Hospital of Mamasani, Iran.
Methods: This cross-sectional study was conducted in Valiasr Hospital, which has 100 beds. Data were collected using a 210-item researcher-made checklist. For each target, six domains of equipment, human resources, structure, physical space, protocol, and performance charts were considered. Face and content validities were used to confirm the validity and reliability of the questionnaire.
Results: The results of this study showed that the support unit scored the highest (69.45 %), followed by the command and management (66.16%) and education units (66%), respectively. Security units (51%), transportation (41.47%), and evacuation (40%) received the lowest score, respectively.
Conclusion: The findings showed that the hospital under the study was in moderate level in preparedness for disaster. Improving the preparedness of hospitals for disasters will be possible with proper management of available resources and the use of update technologies.
Masoud Yousefi; Fatemeh Mesbahi; Iraj Abbasi; Mahboobeh Kousha; Kourosh Rahmani
Abstract
Background: Nowadays, in the world’s optimal management of science and technology, the use of geographical information system (GIS) is a necessity. In this study, GIS was used to analyze and detect microbial contamination in the water supply system of Masiri city. Methods:A cross-sectional study ...
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Background: Nowadays, in the world’s optimal management of science and technology, the use of geographical information system (GIS) is a necessity. In this study, GIS was used to analyze and detect microbial contamination in the water supply system of Masiri city. Methods:A cross-sectional study utilizing spatial analysis techniques was conducted to find out the water quality problems of water supply system. In this descriptive-analytical study, 400 water samples from all groundwater resources of Masiri city were conducted during two periods of dry and wet season. Residual chlorine, MPN and E.coli of the samples were determinate. Results: Results were compared with national standards and analyzed using SPSS and ArcView software. Concentration distribution map in GIS and the factors affecting Residual chlorine, MPN and E.coli changes were investigated. According to the results obtained in ArcView, it is necessary to improve the microbial quality of Masiri water distribution network in some places, which can be improved by proper management of chlorination and defects. Conclusion:It is concluded that a combination of water quality parameters and GIS methods is very useful asGIS provides efficient capacity to visualize the spatial data.
