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  • Energy Research
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  • 6. Clean water
  • 11. Sustainability
  • 2. Zero hunger
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Hojat Taban; Narges Zohrabi; Ali Reza Nikbakht Shahbazi;

    Climate change, in addition to increasing temperature, causes changes in the duration, intensity, form, and timing of rainfall in different parts of the Earth, which can cause droughts and floods. It also changes the volume, duration, and runoff duration, which will bring about many developments and changes in the water-resource management (Kamal and Massah Bavani, 2009). In order to reduce inconsistencies, studying the impacts of climate change on water resources is necessary. One of the most widely used models for these future studies is Atmosphere-ocean General Circulation Models (AOGCMs) (Wilby and Harris, 2006). In general, most studies present a high degree of uncertainty as a result of using AOGCMs in the simulation of climate change and hydrology parameters. the outputs of simulated water-resource models under climate change could be relied on when the uncertainties are taken into account at all stages (Semenov and Stratonovitch, 2010). In order to innovate the research method, in this study 10 AOGCMs under three greenhouse gas emission scenarios (A1B, A2, and B1) were used in the simulated range of hydro-climatic variables through climatic models and downscaling methods in the Dez Oliya basin during 2040-2069. In Summary, when reviewing the range of hydro-climatic variable changes in the future period, it could be observed that the uncertainty of AOGCMs under all three emission scenarios is greater than the downscaling methods.

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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ علوم و مهندسی آبیاریarrow_drop_down
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    Authors: A Marzban; V Rahmanian; F Servat; M Barzegaran;

    Background and Objective: Water is one of the most valuable environmental factors that has become one of the greatest challenges of human society today. The purpose of this study was to investigate the relationship between religious attitudes toward water saving in high school students in Yazd. Materials and Methods: This cross-sectional descriptive study was conducted in 2018. 600 subjects (300 girls and 300 boys) were selected by random sampling method. The data collection tool was a questionnaire on water saving tendency including 21 questions and Religious attitude questionnaire including 60 questions. The score range for the religious attitude and the tendency to save water was 60-300 and 21-105, respectively. Data were entered into SPSS18 software and analyzed using Chi-square, Pearson correlation coefficient and descriptive statistics. Results: The mean and standard deviation of the religious attitude score and the tendency to save water consumption were 180.11 ± 14.31 and 65.27 ± 10.21, respectively. The religious attitude of students with age and gender, and the tendency toward water saving with gender variables and number of family members was significant (p<0.05). Correlation between religious attitude and tendency to water saving was statistically significant (r=0.69, p=0.01) Conclusion: Considering the positive correlation between religious attitude and tendency towards water saving, efforts to strengthen religious and moral inputs related to water consumption in students can lead to the development of an optimal water consumption attitude in this influential community of a society.

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    سلامت و محیط
    Article . 2019
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ سلامت و محیطarrow_drop_down
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      سلامت و محیط
      Article . 2019
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    Authors: H Ganjidoust; B Ayati; M Delnavaz;

    "n "nBackground and Objectives: Experiments were conducted to investigate the behavior of Moving Bed Biofilm Reactor (MBBR) as a novel aerobic process for treatment of aniline synthetic wastewater as a hard biodegradable compound is commonly used in number of industrial processes. The objective of this paper is evaluation of MBBR in different conditions for treatment of aniline and determination of reaction kinetics."nMaterials and Methods: In the MBBRs, different carriers are used to maximize the active biofilm surface area in the reactors. In this study, the reactor was filled with Light Expanded Clay Aggregate (LECA) as carriers. Evaluation of the reactor efficiency was done at different retention time of 8, 24, 48 and 72 hours with an influent COD from 100 to 3500 mg/L (filling ratio of 50%). After obtaining removal efficiencies, effluent concentration of aniline was measured by adsorption spectrum and maladaptive municipal wastewater treatment plant sludge in batch conditions for confidence of aniline biodegradation and its adsorption to the sludge mass. "nResults:The maximum obtained removal efficiencies were 91% (influent COD=2000 mg/L) after 72 hours. Biodegradation of aniline in MBBR has been also approved by NMR spectrum tests. Finally experimental data has indicated that Grau second order model and Stover-Kincannon were the best models to describe substrate loading removal rate for aniline."nConclusion:biological treatment of aniline wastewater compared to other researchers methods.

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    سلامت و محیط
    Article . 2009
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      سلامت و محیط
      Article . 2009
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    Authors: S Nasrollahi-Sarvaghaji; R Alimardani; M Sharifi; MR Taghizadeh Yazdi;

    Background and Objectives: The continuous increase in solid waste generation worldwide due to population growth and industrialization, calls for management strategies that integrate concerns for environmental sustainability. By quantifying environmental impacts of systems, Life Cycle Assessment (LCA) is a tool which can contribute to answering that call. The aim of this study was to evaluate environmental pollutants resulting from various treatment options including anaerobic digestion, incineration, and landfill of Municipal Solid Waste (MSW) generated daily in Tehran. Materials and Methods: First, the physical properties of the waste and consumption of inputs in the study area were determined from September to October, 2014- 2015. Then the different steps of LCA in relation to each of the subsystems were followed (with SimaPro software). Finally, the results based on the CML Baseline 2000 were presented and analyzed. Results: It was found that when the higher rate of separation and processing in any subsystems increases, the emission of environmental pollutants decreases, so that the global warming potential, acidification, eutrophication, and abiotic depletion as the most important impact categories in the subsystems of anaerobic digestion were obtained as -125935 kg CO2/day, -449 kg SO2/day, -1690 kg PO43-/day and -0.43 kg Sb/day, respectively and in incineration were obtained as -264872 kg CO2/day, -974 kg SO2/day, -3471 kg PO43-/day and -0.76 kg Sb/day, respectively, while in the landfill subsystem, they were estimated to be 74478 kg CO2/day, 362 kg SO2/day, 118 kg PO43-/day, and 0.13 kg Sb/day, respectively. Conclusion: According to the constituent processes of each of the subsystems and the results of the evaluation of exhaust emissions subsystems, it can be concluded that in an integrated system of waste management, the energy-generating systems such as anaerobic digestion and incineration should be as the first priority and the traditional subsystems such as landfill should be as the last priority.

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    سلامت و محیط
    Article . 2016
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ سلامت و محیطarrow_drop_down
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      سلامت و محیط
      Article . 2016
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    Authors: Parastoo Parsamehr; Ali Hosseinzadehdalir;

    Hydraulic jump is one of the important phenomena in rapidly varied flow. Due to this phenomenon the energy loss, the upstream flow velocity significantly decreases. In the present study, hydraulic jump on a new roughened bed -with half cylindrical shape bars with three heights (r) and four different longitudinal spacing (s=1D, 2D, 3D, 4D) were investigated. In total 238 experiments were performed for a range of Froude numbers from 4.6 to 7.4 on horizontal bed and two adverse slopes of 1 and 1.5 %. The results showed that the sequent depth decreases and energy loss and bed shear stress increases as the height, spacing of the rough bars, adverse slope and Froude number increased. In hydraulic jump on adverse slope of 1.5% and rough bed with half cylindrical roughness, sequent depth 36% decreases and the bed shear stress coefficient is 16 times of its corresponding values on smooth and horizontal bed. Some empirical relations for sequent depth ratio, relative energy loss and bed shear stress coefficient were introduced. Totally, the results obtained show that, rough bed with adverse slopes may be used to achieve better performance in stilling basins.

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ علوم و مهندسی آبیاریarrow_drop_down
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    Authors: Mojtaba Hakimi; Mohammad Javad Kazemeini; Abbas Tajaddini;

    Considering that a significant portion of the share of energy consumption among consumer sectors is in the home and commercial sectors and this share is still increasing, there is a need for research in energy consumption management and evaluation of effective indicators in the building industry. Building the country is vital to optimizing energy consumption. One of the most appropriate ways to optimize fuel consumption in the building and housing sector is the implementation of zero energy buildings which is considered as the main solution in the world. In this research, after analyzing the population and statistical sample, data were collected to evaluate effective criteria and options related to energy consumption management. First, fuzzy Delphi method was used to evaluate the sub-criteria and select the main options of each. At first level the criterion is discussed and at the second level the data analysis and research model is analyzed through paired comparisons using fuzzy hierarchical analysis technique. Finally, the most important indicators and criteria are obtained using fuzzy hierarchical analysis. According to the research findings, among the energy consumption optimization management indices investigated by the FAHP method, the economic, construction and utilities indices with 0.333, 0. 201 and 0.176 have the highest management priority, respectively. Energy-efficient optimization has a zero-energy building approach.

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Journal of Structura...arrow_drop_down
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    Authors: samaneh kazemi pouran badr; farhad daneshjoo; ali maasoumy haghighi; Mohsen Ali Shayanfar;

    Increasing energy consumption in the world raises concerns about future energy supplies. In addition, reducing energy consumption will reduce greenhouse gas emissions, such as CO2. Given that residential buildings have a significant share in energy consumption, reducing energy consumption in these buildings through the Building Management System (BMS) and insulation of their Exterior walls can have a significant impact on reducing energy consumption.In order to evaluate the impact of these factors on reducing the energy consumption of residential buildings, using Building Information Modeling process (BIM) with the help of BIM software is the method used in the present study. Using building information modeling process, after the modeling of the desired properties, the thermal analysis of the building has been done and by changing the parameters, the effect of each one on the energy consumption is investigated.The main objectives of this research is to investigate the effect of the use of thermal insulating materials and building management system on reducing energy consumption, comparing all types of thermal insulating materials in terms of type and thickness, comparing insulation and building management systems in terms of reducing energy consumption and finding optimal energy-saving model between different building models that have different conditions. Comparison in this study has been done between different building models and the actual base model. Finally, by doing the stated studies, the model with BMS system with 34.61% reduction in energy consumption compared to the base model has the most effect on reducing energy consumption.

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    Authors: S Khoshyomn; A Heidari; A R Heidari;

    Background and Objective: The steel industry is the worldchr('39')s largest consumer of energy. A large amount of iron waste is produced annually, which its use in the steel industry can be economic. The purpose of this study was to investigate the environmental impacts of the steelmaking from iron scrap as a raw material using a life cycle assessment (LCA) method. Materials and Methods: Simapro software and the ecoinvent database were used to conduct LCA. Data on the steel production process (raw materials, waste, and products) were collected by a questionnaire from a steel plant. Environmental burdens were quantified using ReCiPe, Cumulative Energy Demand (CED), IPCC) Intergovernmental Panel on Climate Change) and water footprints methods. Results: The results of the ReCiPe method showed that the terrestrial ecotoxicity with a value of 14392 kg 1,4-Dichlorobenzene (1,4-DCB) eq/ton of steel and global warming with 5289 kg CO2 eq/ton of steel, had the greatest environmental impact, respectively. The lowest environmental impact of this process was obtained for freshwater ecotoxicity and human carcinogenic toxicity. The carbon footprint resulting from steelmaking is 5.24 ton CO2 eq/ton of steel. The most important sector of the greenhouse gas producer is the consumption of electricity with a rate of 2900 of kg CO2 eq/ton of steel. The cumulative energy demand of one ton of steel ingot was 73393 MJ, which is three times the global equivalent. The total water footprint for one t of steel was 19.5 m3 of water, which is almost near to the equivalent in Europe. Conclusion: the use of iron scrap as raw material in the process of steelmaking instead of iron ore has reduced the amount of human toxicity potential and mineral resource consumption.

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    سلامت و محیط
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      Article . 2019
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    Authors: Mahboobeh Qanavati; Seyed Mohsen Sajjadi; Javad Ahadiyan;

    Along with the numerous developments and facilities for constructing large dams, there is a need for developing design and construction methods for systems that can correctly discharge the floods. Weirs refer to any barrier across a channel that raises the flow level and accelerates the flow when flowing over it (Abrishami and Hoseini, 2011). Piano key weirs are the newest type of long-crest weirs and one of the best solutions for modifying the existing weirs. Reducing the energy of the flow over the weirs before their transfer downstream is a solution for preventing possible damage to the structure itself and downstream structures as well as the excess costs incurred by the builders of hydraulic structures due to constructing strong protective structures (Katourani, 2012). Lempèrière and Ouamane (2003) described the piano key weirs and stated their advantages compared to other conventional nonlinear weirs as the ability to place the weir in the crest of the reservoir dam and thus increasing the specific flow rate. Erpicum and Machieles (2011) compared the energy dissipation between two different geometries for a piano key weir and a spillway weir. Concerning the application of a block, the tests and results obtained by the US Land Renewal Organization indicate that using large blocks that separate the flow jet and create turbulence can effectively dissipate the kinetic energy of the current.

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    Authors: H. Kazemian; L. Rasuli; B. Mortazavi;

    "n "n "nBackgrounds and Objectives: Hexavalent Chromium is an important contaminant in surface and ground waters and removal from contaminated water and waste water has received interest in recent years. Modified Zeolite with cationic surfactant can remove Cr(VI) from contaminant water. The aim of this research is investigation of Cr (VI) removal from aqueous solutions and its effective parameters by using Modified Zeolite with cationic surfactant."nMaterials and Methods:In this research the efficiency Of Cr(VI) removal and impact of the important parameters including adsorbent dose, pH and contact time in the batch system was studied."nResults:The results of this research showed that SMZ can remove more than 90 & Cr(VI) in the concentration 0.1-1.25 mg/l with optimum dose 0.3 gr and pH=6 120 minute in contact time."nConclusion: Modified natural zeolite have significant potential inCr(VI) removal fromcontaminated water.Maximumpercent removal ofCr(VI)was in the pH=6 and 120minute contact time.Adsorption data in the equilibrium was fitted with Langmuir isotherm. Separation factor was between 0 and 1 that indicates the favorable condition for Cr(VI) adsorption on the SMZ.

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      سلامت و محیط
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