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Open Access Article
1 - A Review of Arsenic Removal Methods from Water Resources
Marzieh Hasanzadeh Fariba OstovarMany of the pollutants in water are known to be harmful for human health and toxic for environment. Among these pollutants, Arsenic is more important because millions of people are exposed to contaminated drinking water. The World Health Organization (WHO) has identifie MoreMany of the pollutants in water are known to be harmful for human health and toxic for environment. Among these pollutants, Arsenic is more important because millions of people are exposed to contaminated drinking water. The World Health Organization (WHO) has identified the permitted limit of below 0.01 mg/L (10 micrograms per liter) for arsenic in drinking water and the same amount for arsenic has been reported in Iran's 1053 standard. In this study, various techniques have been investigated for removing Arsenic and efficiency of different nanoparticles in treatment of Arsenic from drinking water. Common methods of removing Arsenic from water sources are including oxidation, coagulation and flocculation, reverse osmosis and ultrafiltration, ion exchange, phytoremediation and new technologies based on the use of nanoparticles. The findings showed that despite of the high arsenic removal percentage using different methods such as oxidation, ion exchange and floating with dissolved air, these methods are not economic and a lot of time is required to achieve optimal efficiency. Recently, the use of nanoparticles has become very popular, so that metal oxide nanoparticles such as magnetic iron, Zinc, Copper, Serum, and Aluminum can completely eliminate Arsenic soluble with a high concentration of 50 mg/L in water sources and after the adsorbent is saturated, it is possible to use the regeneration of adsorbents, repeatedly by adsorbing the pollutant into the adsorbent. As a result, the use of nanoparticles is better than chemical processes and is economic due to their high efficiency in a short time. Manuscript profile -
Open Access Article
2 - Implementation of Green Library Component in Iranian academic libraries
Fatemeh Rezaeimanesh mohsen Haji Zeinolabedini Amir Reza AsnafiThe purpose of this study was to identify the status of green library components in the central libraries of the target community, clarify the role of libraries in implementing the culture of a green community and provide solutions and strategies to fill existing gaps MoreThe purpose of this study was to identify the status of green library components in the central libraries of the target community, clarify the role of libraries in implementing the culture of a green community and provide solutions and strategies to fill existing gaps and implement a green library. The research method is survey-descriptive. The statistical population includes the libraries of level one universities of the Ministry of Science, Research and Technology and the Ministry of Health, Treatment and Medical Education in terms of space, equipment and manpower. A researcher-made questionnaire was used to collect data. Then the data obtained were analyzed at the level of descriptive statistics with SPSS software and by calculating the mean, standard deviation, absolute frequency and frequency percentage. The research findings showed that the central library of level one university of the Ministry of Science, Research and Technology and the Ministry of Health, Treatment and Medical Education are not in a good condition due to the green components and the standard lead. To have a green academic library, one should start by promoting green thinking and culture in the society, because many of our problems in this field are rooted in culture and misuse of natural and non-renewable resources. The results of the present study can inform libraries about their current situation that how they are far from the ideal situation and use the strategies presented in this study to implement a green library to have a green academic library. We do not necessarily have to start with a green building, these libraries have green missions and they can be known as the green library by implementing several green components in their library. Manuscript profile -
Open Access Article
3 - Evaluation of forest road characteristics and comparison with environmental and technical standards (Case study: Tang-e-Sulk Bahmii Protected Area, South Zagros)
Seyed Ata ollah HosseiniThe aim of the study is to compare road geometric characteristics with standard road construction values. The study area is Tang-e-Sulak, protected area located in Bahmiy (Kohgiluyeh and Boyerahmad), at the southern Zagros forests. First, the existing road location was MoreThe aim of the study is to compare road geometric characteristics with standard road construction values. The study area is Tang-e-Sulak, protected area located in Bahmiy (Kohgiluyeh and Boyerahmad), at the southern Zagros forests. First, the existing road location was taken using GPS and then placed on a topographic map. In the next step, the slopes were graded (from 0-10, 10-20, 20-30, 30-40, 40-50, 50-60 and > 60 percent), then 11 samples were randomly selected on each slope. In the next step, the size of the samples was compared with the standard values (Booklet No. 131 and 161). The width of the running surface and path of the way were analyzed on the basis of analytical and other road geometric characteristics based on descriptive statistics. Soil samples were taken from each of the slopes’ grades. Data analysis was done by T-test and Pearson correlation in SPSS 22. The results show that the width of the road and the construction area of the road on the slopes 10-20, 40-50, 60-50, and 60 were less than the standard values and it is statistically significance (P<0.01), and in other slopes wasn’t significant differences. Analytical descriptive statistics showed that the average slope of excavation and embankment walls is 15% higher than the standard value. The results of soil texture analysis by unified classification method showed silty- clay texture.Analytical descriptive statistics showed that the average slope of excavation and embankment walls is 15% higher than the standard value.The results of soil texture showed siltyclay texture. Manuscript profile -
Open Access Article
4 - Examining the components of the LEED index in the improvement of the second secondary schools of Semnan province with an ecological approach
farzad mohammadi Mohammad Rahmani ghasbeh Gholamhosein naseriToday, due to the fact that non-renewable energy resources are running out and the destruction caused by the use of these resources leads to the environment; The attention of countries has been drawn towards the use of renewable resources and sustainable development. At MoreToday, due to the fact that non-renewable energy resources are running out and the destruction caused by the use of these resources leads to the environment; The attention of countries has been drawn towards the use of renewable resources and sustainable development. At this time, the attitude towards green architectural approaches in schools has a special place because in addition to observing the basic points of green buildings and saving energy, the existence of such schools is an educational tool for teaching sustainable practices to students. The purpose of this research is to investigate the degree of realization of the components of green schools based on the LEED standard tool with an ecological approach in the secondary schools of Semnan province for improvement. In terms of practical purpose and in terms of descriptive-analytical method and rating and scoring tool, the present research is LEED in the sense of design and environmental guide. The statistical population includes all secondary schools in Semnan province. The data collection tool was a questionnaire and standard indicators, after collecting information and data from the questionnaires; The data were analyzed using Spss software version 22 and with descriptive and inferential statistics. The results showed that the LEED index for checking the improvement of suitable schools and from the point of view of having green schools and components are in the lower than average range. Manuscript profile
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