Showing 6 results for Alipour
V Alipour, L Rezaei,
Volume 3, Issue 4 (8 2011)
Abstract
Background and Objectives:Dual media filters have two different layer beds consist of sand and Anthracite. Advantage of dual media filters is longer run duration and more filtration rate. The purpose of this study was to achieve a performable model to improve single media Filters in water treatment plants.
Materials and Methods: in this cross-sectional study, two pilots mono and dual media were made and in a 5 month period samples taking were done. Total samples taken from input and output of each pilot, was 40. The samples then introduced for the measurment of turbidity and total organic carbon. Meanwhile the filters head loss also quantified in 40 times head loss measurement was done.
Results: Average turbidity removal in mono and two layer pilots were 63 and 65 percent respectively. Average removal of Total Organic Carbon in mono and two media pilots were 40 and 66 percent respectively. Head loss in dual and single media pilots were 0 .68 and 1.15 m respectively.
Conclusion: Although average torbidity removal disparity between two pilots was not significant the amount of total organic carbon removed was considerable. Average head loss in single media pilot was more than dual media type. Ratio of UFRV in dual media to mono media filter was 51:30 it shows that filtration rate capacity will be improved up to70 percent by changing media type.
V Alipour, L Rezaei, Kh Moalemi, M Eghbali,
Volume 4, Issue 1 (24 2011)
Abstract
Background and Objectives: Fresh fruit juice is one of the best drinks which have minerals and vitamins and is a good source for water compensation, but if microbial quality of the fruit juice does not meet the standard level, it can be play as a source for food disease infections.
Material and method:In his cross-sectional study, all of 58 fruit juice shops in Bandar Abbas were selected as study population, correspondence rate was 84 percent. The samples were tested for total Coliform, Escherichia coli, Staphylococcus aureus, yeasts and molds.
Results:Testing the samples showed among 146 samples, 142 of them were contaminated by microorganisms. All of Carrot and mango juices were contaminated. The mean contamination rate of juices to Coliform bacteria, Mesophilic bacteria, Escherichia coli and yeasts were 86.2, 53.2, 57 and 56.6 percents respectively.
Conclusion:97.3 percents of samples did not have a good microbial quality for human consumption. If consumption of fresh fruit juices will cause the consumer at risk of food borne diseases, all the natural benefits of them in terms of richness in minerals and vitamins will waste.
R Shokuhi, E Hosinzadeh, G Roshanaei, M Alipour, S Hoseinzadeh,
Volume 4, Issue 4 (2 2012)
Abstract
Background and Objectives: Aydughmush dam was built on Aydughmush River at 19km in southwest of Mianeh City. The dam is multipurpose and its main aims are the spring floods control, supplying potable water for villages and providing irrigation water. Different pollutants which probably discharge to the river finally enter to the dam reservoir so this study focuses on evaluating the quality of the dam reservoir.
Materials and Methods: In this cross sectional study standard field parameters including dissolved oxygen, temperature, Biochemical and chemical oxygen Demand, Most Probable Number of Coliforms, Fecal Coliform, Turbidity, Total Dissolved Solids, Total Solids, pH, conductivity and others were measured at eight different stations during the spring and summer in 2010. Sampling points were selected on the basis of their importance. Water quality index was calculated using water quality index calculator given by National Sanitation Foundation (NSF) information system.
Results: The highest value of WQI of the samples was 84.89 in A3 station in July while the lowest value was 67.96 in A2 station in May. The lower value of WQI has been found mainly due to the slightly lower value of DO in the dam reservoir water. Most of the water samples were found within Good category of National Sanitation Foundation Water Quality Index (NSF-WQI). Comparison of the measured parameters based on the sampling stations and various months by variance and t-student analysis showed a significant relationship for some parameters(P<0.05). Nutrient budget determination indicates that the concentration of phosphate, nitrite, nitrate and ammonia at inlet are higher than outlet of the dam reservoir.
Conclusion: The calculated (WQI) showed good water quality. Based on the results of NSFQWI calculations, the dam reservoir water quality is suitable for various purposes.
N Shiralipour, Mr Mirzaee Nejad,
Volume 11, Issue 4 (3-2019)
Abstract
Background and Objective: Health expenditures and environmental pollution are indicators of development. Therefore, the aim of this study was to examine the effect of health per capita costs and the impact of carbon dioxide emissions (CO2) as an indicator of environmental pollution on the growth of selected developed and developing countries.
Materials and Methods: The effect of health expenditures and air pollution on economic growth was studied based on the data of two groups of developed and developing countries (2000-2015) and the use of econometric methods.
Results: The fitting of the equations confirmed the significant effect of the health expenditure per capita and CO2 emission on the economic growth of both groups of countries. One percent change in these expenditures resulted in 0.029 percent economic growth in the developed countries and 0.054 percent in the developing. Also, the effect of CO2 release on the economic growth was -0.011 and -0.073.
Conclusion: Health has a direct impact on economic growth. Health has a positive effect on the economic growth by reducing health costs (and spending these resources in other areas) and by increasing labor productivity through increasing life expectancy and useful work time. Also, increasing air pollution has a negative effect on the economic growth of these countries.
Mr Samarghandi, Ar Rahmani, Z Darabi, J Mehralipour,
Volume 12, Issue 4 (2-2020)
Abstract
Background and Objective: Electroproxone process is a combination of ozonation process and electrolysis in which the production of hydroxyl radical and ultimately degradation of a pollutant occurs. The aim of this study was to estimate the E-Proxone process in removing ceftriaxone from a synthetic solution.
Materials and Methods: In this experimental study, a semi-continuous reactor equipped with four graphene electrodes having 2 × 10 cm dimension and 3 mm thickness was used. The effect of pH (3-11), concentration of ozone gas (1-5 mg/min), direct electric current (1-3 A), initial concentration of ceftriaxone (5-50 mg/L) and radical scavenger dose (tertbutanol = 20 mmol/L) was studied in a 0-60 minutes reaction time. The Ceftriaxone concentration was measured by HPLC, COD was measured with spectrophotometer (DR6000) and TOC with a TOC analyzer.
Results: The results of this study indicated that this process had sufficient performance in the degradation of the antibiotic and diminishing of COD and TOC. The excellent condition was pH = 3, the electric current of 3 A, the ozone concentration of 5 mg/min, and the sodium sulfate as an electrolyte was 50 mmole/L. The ceftriaxone concentration was 5 mg/L in the duration of the 30 minutes experiment. 99.39% of the Ceftriaxone was destroyed. The process efficiency in COD and TOC removal was highest at 90 minutes. The presence of tertbutanol reduced the process efficiency to 83%.
Conclusion: The E-Proxone process, as one of the advanced oxidation processes, has the ability to reduce the pollution load of pharmaceutical industry, especially the ceftriaxone in this wastewater. This process is considered an environmentally friendly process.
Aram Arpanaei, Sina Attarroshan, Sima Sabzalipour, Iman Arpanaei,
Volume 13, Issue 4 (2-2021)
Abstract
Background and Objective: Pollutants emitted from industries can endanger human health if they enter the food chain, so environmental monitoring is essential. The aim of this study was to investigate the bioaccumulation of heavy metals including lead, copper and nickel and the level of air pollution tolerance index in Prosopis juliflora and Conocarpus erectus tree species during one-year period (1399-1400) in Mahshahr city.
Materials and Methods: In order to investigate the bioaccumulation of heavy metals by two species of Prosopis juliflora and Conocarpus erectus, 15 stations were selected separately. After recording the coordinates of each tree (station), 4 leaveas were taken from each tree that accounted for total 60 samples. The samples were then transferred to the laboratory and digested then analyzed using atomic absorption spectrometer. For statistical analysis, K.S test was used to normalize data and independent t-tests were applied to determine the level of significance. The correlation between variables were tested by Pearson correlation. Spatial distribution of heavy metals was performed using Ver.10.4 Arc GIS software.
Results: Conocarpus erectus established the highest adsorption value for metals such as lead (0.1223±0.35 mg/kg), copper (0.2101±0.053 mg/kg) and nickel (0.2023±0.094 mg/kg). No significant correlation was observed between heavy metals. Evaluation of air pollution tolerance showed that Conocarpus erectus (6.53±0.026 mg/kg) was more tolerant than Prosopis juliflora (4.77±0.029 mg/kg). Spatial distribution revealed that heavy metals accumulation in the leaves of trees were more obvious in the southest area of the city.
Conclusion: Conocarpus erectus is more tolerant of air pollution than Prosopis juliflora. Therefore, it can be used in areas with the high levels of pollution. Moreover, the spatial distribution of heavy metals’ bioaccumulation illustrated that the south and southeast parts of the city (due to industry concentration) are more affected by the heavy metals pollution which call for more palnting trees.
