@article{ author = {Samadi, Mohammad Taghi and TarlaniAzar, Monire and Almasi, Halime and Shanesaz, Samane and Harati, Roy}, title = {Efficiency Comparison of Modified-Clay and Lime-Marlin the Adsorption of Fluoride from Aqueous Solution}, abstract ={Background and purpose: Fluoride is one of the common anion in water that its concentration varies in different water supplies. Most of the body's requirement for fluoride is supplied through drinking water. Fluoride in low concentration is essential for human health but in high concentration is very hazardous for human health. The efficiency of modified-clay and lime-marl were investigated in this research as an adsorbent for the elimination of fluoride from aqueou solution.  Methods: In this study, the capability of modified-clay and lime-marl to adsorb fluoride ions was conducted using a series of batch tests in a shaker-incubator instrument. The effect of experimental parameters such as pH (4,7,10),  adsorbent dosage (1,5,10 g/L), initial fluoride concentration  (5,10,15 mg/L) andcontact time (15-120 min) were evaluated. The morphological and micro-structural character of  modified-clay and lime-marl have performed by using X-ray diffraction (XRD). The formation of the carboxylic functional groups was verified by Fourier transform infrared spectra (FT-IR).  Findings: results well demonstrate higher removal efficiency of fluoride was 95.23% and 28.71 by clay-modified and lime-marl, respectively; at 10 mg/L of fluoride concentration and 60 min contact time. The adsorption kinetics fitted well using the pseudo second-order kinetic model; however, equlibrium data were best fitted onto Langmiur isotherm model. The maximum adsorption capacities of modified-clay and lime-marl for fluoride were found to be 4.43 mg/g and 1.32 mg/g, respectively. Conclusion: According to our finding, it proposed that adsorption process by using modified clay is very efficient and economic process for fluoride removal from aqueous solution.}, Keywords = {Fluoride, Clay, Lime, Aqueous solutions}, volume = {3}, Number = {3}, pages = {169-181}, publisher = {Alborz University of Medical Sciences}, doi = {10.18869/acadpub.jehe.3.3.169}, url = {http://jehe.abzums.ac.ir/article-1-237-en.html}, eprint = {http://jehe.abzums.ac.ir/article-1-237-en.pdf}, journal = {Journal of Environmental Health Engineering}, issn = {2383-3211}, eissn = {2588-4239}, year = {2016} } @article{ author = {MajlesiNasr, Monireh and Ansarizadeh, Mohammad and Leili, Mostaf}, title = {The Assessment of Air Pollutant Concentrations and Air Quality Index in Shiraz during 2011-2013}, abstract ={Background: Exposure to air pollutants can cause many problems, including the health effects in humans and animals. The aim of this study was to assay the air quality in the Shiraz city during 2011-2013. Methods: In this descriptive-analytical study, the air pollutant data during the study period were taken from Air Quality Co. for two main stations i.e. Darvazeh Kazeroun and Imam Hossein and then were analysed to determine air quality index. Results: The maximum (0.018 ppm) and minimum (0.015 ppm) annual concentration of SO2 were determined in 2011 and 2013, respectively. The maximum NO2 concentration was measured in summer 2011 with a value of 0.025 ppm. Regarding ozone, the highest average concentration was measured in the summer season of 2013 with the concentration of 0.068 ppm. In terms of air quality, the worst situation was experienced in 2011, which about 31 percent of the days have been marked as unhealthy, but during the last years of the study, the air quality get better. Conclusion: In general, the results of the study showed that SO2 concentration has been decreased during recent years due to strengthen of air pollution regulation but NO2 concentration was increased because the number of gas fuel automobile was also increased. With regard to air quality, it has an improving trend during the study period.}, Keywords = {Air Pollution, SO2, NO2, O3, Air Quality Index, Shiraz}, volume = {3}, Number = {3}, pages = {182-192}, publisher = {Alborz University of Medical Sciences}, doi = {10.18869/acadpub.jehe.3.3.182}, url = {http://jehe.abzums.ac.ir/article-1-238-en.html}, eprint = {http://jehe.abzums.ac.ir/article-1-238-en.pdf}, journal = {Journal of Environmental Health Engineering}, issn = {2383-3211}, eissn = {2588-4239}, year = {2016} } @article{ author = {Jafarigol, Farzaneh and Atabi, Farideh and Momeni, Mahmoudrez}, title = {The Survey of NOX Distribution Using Dispersion Models AERMOD and CALPUFF at a Gas Refinery}, abstract ={Background & Objectives: Nowadays, air pollution is one of the major challenges in the world, therefore, in the present study, according to the importance of the fourth refinery gas as the largest gas refinery in the region, the amount of emissions from stacks has been initially determined and then the distribution has been identified in the region. Methods: In this research, AERMOD and CALPUFF models have been used as the tools for the analysis of NOX emissions of stacks of 4th South Pars gas refinery located in Assaluyeh. First, NOX emissions from refinery stacks have been obtained by field measurements. Then, the distribution of these emissions has been examined using dispersion models AERMOD and CALPUFF in an area of 50 × 50 km in each direction x and y in the one-year period of 2013 to the average time of 1, 3, 8, and 24 and the amounts resulting from the implementation of the models have been compared to the results of field measurements at 9 receiving stations as a separate receptors in the model. Results: Review of charts and statistical parameters has shown that, according to the evaluation of predictions made, the CALPUFF model was better than AERMOD model, in the studied area. Conclusion: It could be concluded that performance of both models to predict the concentration of pollutants in the region can be generally considered acceptable.}, Keywords = {NOX, AERMOD dispersion model, CALPUFF dispersion model, Gas Refinery}, volume = {3}, Number = {3}, pages = {193-205}, publisher = {Alborz University of Medical Sciences}, doi = {10.18869/acadpub.jehe.3.3.193}, url = {http://jehe.abzums.ac.ir/article-1-239-en.html}, eprint = {http://jehe.abzums.ac.ir/article-1-239-en.pdf}, journal = {Journal of Environmental Health Engineering}, issn = {2383-3211}, eissn = {2588-4239}, year = {2016} } @article{ author = {Mohammadnia, Mahin and Naghizadeh, Ali}, title = {Application of Graphene Nanoparticles in Removal of Fluoride from Aqueous Solution in Presence of Sulfate Anion}, abstract ={Background and Objective: Fluoride is one of the essential elements of water that introduce to water resources through several natural and human activities ways. The benefits and risks of fluoride depend on concentration of this anion on drinking waters. In this research, defluoridation of aqueous solution with graphene nanoparticles was studied. Methods: In the present study, effects of pH, contact time, fluoride initial concentration, adsorbent dosage, temperature as well as presence of sulfate anion in performance of graphene nanoparticles in removal of fluoride from aqueous solution were investigated. Langmuir and Freundlich isotherms also were evaluated. Results: Maximum adsorption capacity occurred in first 15 minutes in pH=3 and initial fluoride concentration of 10 mg/L. The results also show that adsorption of fluoride on graphene well fitted with Freundlich isotherms. In presence of the sulfate anion, the adsorption capacity decreased. Furthermore, Increasing of temperature led to reducing the adsorption capacity that indicative of exothermic adsorption reaction. Conclusion: According to results of this research, graphene have good adsorption capacity in removal of fluoride from aqueous solution.}, Keywords = {Nanoparticles, Graphene, Adsorption isotherm, Fluoride}, volume = {3}, Number = {3}, pages = {206-219}, publisher = {Alborz University of Medical Sciences}, doi = {10.18869/acadpub.jehe.3.3.206}, url = {http://jehe.abzums.ac.ir/article-1-240-en.html}, eprint = {http://jehe.abzums.ac.ir/article-1-240-en.pdf}, journal = {Journal of Environmental Health Engineering}, issn = {2383-3211}, eissn = {2588-4239}, year = {2016} } @article{ author = {Saeedi, Sedigheh and Godini, Hatam and Kamarehie, Bahram and Zare, Sudabeh and Rashidipoor, Marziyeh and Ebrahimi, Zohre and Mostafaee, Parvi}, title = {Investigation of Experimental Factors in Photocatalytical Degradation of Phenol from Aqueous Solution by UV/ZnO}, abstract ={Background and purpose: Phenol is an aromatic hydrocarbon and one of the banzan derivatives which have a higher dissolution rate in water and common methods cannot completely remove it. The main objective of this research was to study removal of phenol using UV/ZnO. Materials and Methods: This study was conducted in a batch system. the experiments was conducted in a reactor with a capacity of 1 liter using zinc oxide nanoparticles that fixed on glass with the thermal fixing method and UVc radiation were used. The effects of initial concentration of phenol, solution pH, and contact time on the photocatalytic removal of phenol were studied. [MP2D1]  Results: The results showed that the best conditions for the removal of phenol were achieved at  pH 3, 5 mg/L initial phenol concentration, 3950 μw/cm2 radiation intensity and 120 min contact time (100% removal efficiency). The pH, initial phenol concentration, and contact time have an effect on phenol removal efficiency; the phenol removal efficiency increases with the decrease of initial phenol concentration and pH. Conclusion: Results of the present study showed that the photocatalytic degradation process (UV/ZnO) is an effective method in removal of phenol from aqueous solutions.  }, Keywords = {Photocatalytic oxidation, ZnO nanoparticles, Phenol, pH}, volume = {3}, Number = {3}, pages = {220-227}, publisher = {Alborz University of Medical Sciences}, doi = {10.18869/acadpub.jehe.3.3.220}, url = {http://jehe.abzums.ac.ir/article-1-241-en.html}, eprint = {http://jehe.abzums.ac.ir/article-1-241-en.pdf}, journal = {Journal of Environmental Health Engineering}, issn = {2383-3211}, eissn = {2588-4239}, year = {2016} } @article{ author = {Baneshi, Mohammad Mehdi and RayganShirazi, Alireza and Zare, Morteza and Rezaei, Soheila and Sadat, Abdolmohamm}, title = {The Effects of Polychlorinated Biphenyls Compounds on the Number of Bacteria in the Rhizosphere Sorghum and Onobrychis.s Plants by Single and Mix Cultivation}, abstract ={Background: Polychlorinated biphenyls (PCBs) are toxic xenobiotic compounds that are extremely persistent in the environment. Use of plants for the treatment of polluted sites, has been used successfully to removal of variety of organic compounds, including PCBs. In this study the effects of polychlorinated biphenyls evaluated on bacterial populations of two plants onobrychis.s and sorghum single and mixed plants cultivation. Materials and methods: The soil samples were collected from ranges (0–20cm Depth) of Yasuj city, province of Kohqiluyeh & Buyerahmad and then polluted with different concentrations of PCBs (0, 100, 200,400,800 ppm). Soil bacterial population was measure than dilution series (Serial method), and, expressed as cfug-1 dry soil. At the end of the study (120 days after planting), plants were separated from the soil. Result: According to the results, average bacterial population in the soil with plant in compare by soil without the plant had a significant difference (p <0.05) between of different modes have the greatest impact on the population of bacteria mix culture> sorghum> onobrychis. S. root/shoot ratios have the greatest amount in mix culture (90%) and after onobrychis.s (72%) and sorghum (63 percent) Conclusion: According to the results of mix culture to single it caused more stimulate of bacteria and increase their numbers in the rhizosphere zone. In generally mix culture + surfactant (Tween80) were as the best mod.}, Keywords = {Phytoremediation, Sorghum, Onobrychis.s, Mix culture, Surfactant }, volume = {3}, Number = {3}, pages = {228-238}, publisher = {Alborz University of Medical Sciences}, doi = {10.18869/acadpub.jehe.3.3.228}, url = {http://jehe.abzums.ac.ir/article-1-242-en.html}, eprint = {http://jehe.abzums.ac.ir/article-1-242-en.pdf}, journal = {Journal of Environmental Health Engineering}, issn = {2383-3211}, eissn = {2588-4239}, year = {2016} } @article{ author = {Aali, Rahim and Nikaeen, Mahnaz and Hatamzadeh, Maryam and Moazeni, Malihe and Khanahmad, Hossain and Shahryari, Ali}, title = {The role of Hospital Wastewaters in Dissemination of Antibiotic Resistant Bacteria and Resistance Genes to the Environment}, abstract ={Background: Antibiotic resistance Genies causes many problems in hospitals. Dissemination of these agents to the environment is a great concern worldwide. The aim of this study was to investigate the concentration of antibiotic resistant bacteria (ARB) and presence of antibiotic resistance genes(ARGs) in hospital wastewaters. Methods: in present work, 33 sample from raw hospital wastewater were taken from three hospitals. Heterotrophic plate counts (HPC) method was used to assess the concentration of ARB in hospital wastewater samples. Six conventional antibiotics were selected. Presence of six resistance genes regarding to the selected antibiotics were surveyed in wastewater samples and isolated ARB by PCR method. Results: Average concentration of ARB in raw hospital wastewater was 3.81 ×107 CFU/100mL. Frequency pattern of ARB in raw hospital wastewater was as follows: ceftazidim(CAZ)> tetracycline(TE)> sulfomethoxazol (STX)> chloramphenicol (CHL)> erythromycin (ER)> and gentamicin(GM), respectively. ARGs in raw wastewater samples were detected more than isolated bacteria. ARGs frequency pattern in wastewater samples were as follows: sul1>cmlA1>ermB>tetW>aac3-1>ctx-m-32. Conclusion: The results of this study revealed that there are high concentration of ARB and ARGs in hospital wastewaters. Therefore, hospital wastewaters could play an important role in dissemination of ARB and ARGs into the natural environment and therefore, may pose serious public health risks.}, Keywords = {Hospital wastewaters, ARGs, PCR, Environment}, volume = {3}, Number = {3}, pages = {239-248}, publisher = {Alborz University of Medical Sciences}, doi = {10.18869/acadpub.jehe.3.3.239}, url = {http://jehe.abzums.ac.ir/article-1-243-en.html}, eprint = {http://jehe.abzums.ac.ir/article-1-243-en.pdf}, journal = {Journal of Environmental Health Engineering}, issn = {2383-3211}, eissn = {2588-4239}, year = {2016} } @article{ author = {Nourisepehr, Mohammad and HajibagherTehrani, Sahba and MolaeiTavani, Sakineh and Ghanbari, Amir Hossei}, title = {The survey of biological absorption of hexavalent chromium from aqueous solutions by Wastewater stabilization pond algae}, abstract ={Background: Contamination of aquatic habitats due to toxicity and accumulation of heavy metals leading to serious damage to organisms and their advance to the food chain. Chrome is one of these heavy metals for the three and six-valence oxides used in industry. Health risks such as carcinogenic hexavalent chromium have been For this reason, removal and reduction of environment is essential. Target of this study hexavalent chromium biosorption by waste stabilization pond algae is of the aquatic environment. Methods: This study was a fundamental applied; In this batch reactor, variables Was investigated pH(3,5,7,9,11), Contact time(30,60,120,180,240,300min), The concentration of hexavalent chromium(0.5,1,5mg ) And the concentration of algae(0.25, 0.5, 1, 3g). Liquid mixed municipal wastewater treatment stabilization pond was used for insemination. For the investigate the effects of variables pH, contact time, the concentration of hexavalent chromium values in a 250 ml Erlenmeyer flask prepared and various amounts of dried algae (0.25-0.5-1- 3 g) were added to it. Then became the shakers. After mixing, the filter paper was passed. The lab temperature was centrifuged for min10-5 rpm 2700 rpm. Then it was read at a wavelength absorbed by 540 nm. . Then collected was data to Excel and SPSS software. Finally was used for hexavalent chromium adsorption isotherm model equation of Langmuir and Freundlich. Results: This study shows that PH, contact time, the concentration of hexavalent chromium and chromium concentrations of algae optimal absorption by algae concentrations, respectively, in5 mg / l, min 120, 0.5 mg / l and is 1gr. Average maximum absorption of chromium Wastewater stabilization ponds by algae 97/2%, respectively. Correlation coefficients absorption curves of these models showed that Cr (VI) adsorption isotherm on wastewater stabilization pond algae follows (= R).  Conclusion: The results showed that wastewater stabilization pond algae as a biological absorption, very high ability to absorb their hexavalent chromium from aqueous solutions. In addition with advantages such as low cost, no need for skilled workers, low excess Chemical waste sludge, metal restore capabilities have been further considered. }, Keywords = {Biosorption, Heavy Metals, Chromium, AlgaeŁˆ Wastewater Stabilization Ponds}, volume = {3}, Number = {3}, pages = {249-258}, publisher = {Alborz University of Medical Sciences}, doi = {10.18869/acadpub.jehe.3.3.249}, url = {http://jehe.abzums.ac.ir/article-1-249-en.html}, eprint = {http://jehe.abzums.ac.ir/article-1-249-en.pdf}, journal = {Journal of Environmental Health Engineering}, issn = {2383-3211}, eissn = {2588-4239}, year = {2016} }