ABSTRACT Landfilling leachate contains a high concentration of organic and inorganic pollutants. ... more ABSTRACT Landfilling leachate contains a high concentration of organic and inorganic pollutants. The present study was aimed to evaluate the efficiency of the electrocoagulation system in removing chemical oxygen demand (COD) and ammonia-nitrogen (NH4-N) from leachate. The paper investigated the factors affecting removal efficiency such as current density (187.5, 375, and 562.5 A/m2), electrode material (Al and Fe), and electrolysis time and pH of the solution (6.5 ± 0. 2). The results indicated that, in optimum conditions, the highest COD and NH4-N removal efficiencies were 66 and 63%, respectively. According to the results, performance of the Al electrode was better than that of the Fe electrode in terms of COD and NH4-N removal. Therefore, the results showed that electrocoagulation can be applied for the leachate pretreatment as a feasible and reliable technique.
Eastern Mediterranean health journal = La revue de santé de la Méditerranée orientale = al-Majallah al-ṣiḥḥīyah li-sharq al-mutawassiṭ, 2013
To evaluate the need for congenital rubella syndrome prevention in our national health programme ... more To evaluate the need for congenital rubella syndrome prevention in our national health programme we aimed to determine the rate of anti-rubella positivity in umbilical cord blood samples 8 years after measles-rubella mass vaccination in the Islamic Republic of Iran. In a cross-sectional study we tested umbilical cord blood samples for anti-rubella IgG and IgM by ELISA in 154 deliveries at a university hospital in Tehran. Overall 72.7% of umbilical cord blood samples were positive for anti-rubella lgG and 27.3% were negative. All of the samples were negative for anti-rubella IgM. In the samples with a history of mothers' rubella vaccination, only 87.5% were positive for anti-rubella IgG. The results suggest the need for another mass vaccination for rubella in women of child-bearing age and continuation of routine vaccination of infants, plus consideration of obligatory anti-rubella IgG testing before pregnancy in women who were not vaccinated and vaccination of women before marri...
One of the arid and semi -arid climatic phenomena and areas adjacent to these areas, phenomena ar... more One of the arid and semi -arid climatic phenomena and areas adjacent to these areas, phenomena are dust and to dust storms, which have affected large areas of the atmosphere, causing atmospheric blur reduction horizontal and vertical viewing many effects on other environmental, social, economic and health. One of the most devastating effects of Hurricane dust phenomenon that happens it can cause environmental damage and the onset or exacerbation respiratory diseases, heart disease, air and ground traffic, tourism, agriculture. This study investigates the phenomenon of dust and its impact on the environment and health are identified.
With the growing industrial and social development through time, toxic substances such as phenol ... more With the growing industrial and social development through time, toxic substances such as phenol and its derivatives are increasingly released into the environment from a variety of sources. The present study aims to investigate the effects of molasses on phenol removal. For this purpose, five pilot scale batch reactors (5 Erlenmeyer flasks equipped with the air and gas diffusion control system) were used in the laboratory scale. The volumes of the reactors were kept constant with a final volume content of 550 ml in each reactor. Phenol with a fixed concentration of 100 mg/l was tested under anaerobic conditions in each reactor in contact with beet molasses (organic matter used as the auxiliary substrate) with COD concentrations of 10000, 5000, 2000, 1000, and 500 mg/l over 5 retention times (10, 20, 30, 40, and 50 days). All the sampling and testing procedures wer
Phenols are among the most common organic pollutants because of their toxicity even at low concen... more Phenols are among the most common organic pollutants because of their toxicity even at low concentrations. The effects of the retention time and the phenol concentration on the stabilization pond efficiency in the treatment of oil refinery wastewater were the purpose of this study, and hence the input of a pilot unit was varied in terms of phenol concentrations and retention time. The following parameters have been examined, NH 4 + , PO 4 3-, phenol, TCOD, SCOD, TBOD, SBOD and pH. The results showed that the average efficiency in the stabilization ponds varied in the ranges 71.9 -91.2%, 76.4 -93.3%, 68.4 -91.7%, 75.9 -93.7% and 77.6 -98.0% for the removal of SCOD, TCOD, SBOD, TBOD and phenol, respectively. These results indicated that the phenol concentration and the retention time affected dramatically the anaerobic and facultative ponds performance, so that the system performance was significantly increased by decreasing the phenol concentration and increasing the retention time. It can be concluded that stabilization ponds show favorable performance in removing organic compounds at various phenol concentrations and high retention times; this system can be therefore used to replace rather expensive and complex systems such as active sludge.
ABSTRACT Landfilling leachate contains a high concentration of organic and inorganic pollutants. ... more ABSTRACT Landfilling leachate contains a high concentration of organic and inorganic pollutants. The present study was aimed to evaluate the efficiency of the electrocoagulation system in removing chemical oxygen demand (COD) and ammonia-nitrogen (NH4-N) from leachate. The paper investigated the factors affecting removal efficiency such as current density (187.5, 375, and 562.5 A/m2), electrode material (Al and Fe), and electrolysis time and pH of the solution (6.5 ± 0. 2). The results indicated that, in optimum conditions, the highest COD and NH4-N removal efficiencies were 66 and 63%, respectively. According to the results, performance of the Al electrode was better than that of the Fe electrode in terms of COD and NH4-N removal. Therefore, the results showed that electrocoagulation can be applied for the leachate pretreatment as a feasible and reliable technique.
Eastern Mediterranean health journal = La revue de santé de la Méditerranée orientale = al-Majallah al-ṣiḥḥīyah li-sharq al-mutawassiṭ, 2013
To evaluate the need for congenital rubella syndrome prevention in our national health programme ... more To evaluate the need for congenital rubella syndrome prevention in our national health programme we aimed to determine the rate of anti-rubella positivity in umbilical cord blood samples 8 years after measles-rubella mass vaccination in the Islamic Republic of Iran. In a cross-sectional study we tested umbilical cord blood samples for anti-rubella IgG and IgM by ELISA in 154 deliveries at a university hospital in Tehran. Overall 72.7% of umbilical cord blood samples were positive for anti-rubella lgG and 27.3% were negative. All of the samples were negative for anti-rubella IgM. In the samples with a history of mothers' rubella vaccination, only 87.5% were positive for anti-rubella IgG. The results suggest the need for another mass vaccination for rubella in women of child-bearing age and continuation of routine vaccination of infants, plus consideration of obligatory anti-rubella IgG testing before pregnancy in women who were not vaccinated and vaccination of women before marri...
One of the arid and semi -arid climatic phenomena and areas adjacent to these areas, phenomena ar... more One of the arid and semi -arid climatic phenomena and areas adjacent to these areas, phenomena are dust and to dust storms, which have affected large areas of the atmosphere, causing atmospheric blur reduction horizontal and vertical viewing many effects on other environmental, social, economic and health. One of the most devastating effects of Hurricane dust phenomenon that happens it can cause environmental damage and the onset or exacerbation respiratory diseases, heart disease, air and ground traffic, tourism, agriculture. This study investigates the phenomenon of dust and its impact on the environment and health are identified.
With the growing industrial and social development through time, toxic substances such as phenol ... more With the growing industrial and social development through time, toxic substances such as phenol and its derivatives are increasingly released into the environment from a variety of sources. The present study aims to investigate the effects of molasses on phenol removal. For this purpose, five pilot scale batch reactors (5 Erlenmeyer flasks equipped with the air and gas diffusion control system) were used in the laboratory scale. The volumes of the reactors were kept constant with a final volume content of 550 ml in each reactor. Phenol with a fixed concentration of 100 mg/l was tested under anaerobic conditions in each reactor in contact with beet molasses (organic matter used as the auxiliary substrate) with COD concentrations of 10000, 5000, 2000, 1000, and 500 mg/l over 5 retention times (10, 20, 30, 40, and 50 days). All the sampling and testing procedures wer
Phenols are among the most common organic pollutants because of their toxicity even at low concen... more Phenols are among the most common organic pollutants because of their toxicity even at low concentrations. The effects of the retention time and the phenol concentration on the stabilization pond efficiency in the treatment of oil refinery wastewater were the purpose of this study, and hence the input of a pilot unit was varied in terms of phenol concentrations and retention time. The following parameters have been examined, NH 4 + , PO 4 3-, phenol, TCOD, SCOD, TBOD, SBOD and pH. The results showed that the average efficiency in the stabilization ponds varied in the ranges 71.9 -91.2%, 76.4 -93.3%, 68.4 -91.7%, 75.9 -93.7% and 77.6 -98.0% for the removal of SCOD, TCOD, SBOD, TBOD and phenol, respectively. These results indicated that the phenol concentration and the retention time affected dramatically the anaerobic and facultative ponds performance, so that the system performance was significantly increased by decreasing the phenol concentration and increasing the retention time. It can be concluded that stabilization ponds show favorable performance in removing organic compounds at various phenol concentrations and high retention times; this system can be therefore used to replace rather expensive and complex systems such as active sludge.
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Papers by A. Almasi