Jafar Nouri; Amir Hessam Hassani; Iraj Mehregan; Faramarz Moattar; Mohammad Reza Sadeghi Benis
Volume 10, Issue 2 , January 2013
Nasrin Otadi; Amir Hesam Hassani
Volume 10, Issue 1 , October 2012
Abstract
Pars Oil Refinery, situated 22 km away from metropolitan Tehran, is one of the most important motor oil refineries in the country. Currently, the refinery is composed of various sections including the Furfural, Separation, Storage, Blending, Can-making, Barrel-making and Dyeing, Loading and Unloading, ...
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Pars Oil Refinery, situated 22 km away from metropolitan Tehran, is one of the most important motor oil refineries in the country. Currently, the refinery is composed of various sections including the Furfural, Separation, Storage, Blending, Can-making, Barrel-making and Dyeing, Loading and Unloading, Antifreeze, Grease-making, Boiler, Repair, and Laboratory Units. In the study area, because of such reasons as the high groundwater table the company has failed to launch the biological section of its wastewater treatment plant. In addition, with the possibility of effluents from residents’ sanitary wastewater as well as those from agriculture lands penetrating the soil and ending up in the underground water of the studied area, the present research was conducted on such an environmental dilemma. In order to investigate the hypothesis of effluent penetration into underground water, four stations were selected from among water wells existing throughout the area, and then the parameters of pH, chemical oxygen demand (COD), biological oxygen demand (BOD), nitrate, colour, nitrite, electrical conductivity (EC), sulfate, dissolved solids, ammonia, furfural, heavy metals, and total petroleum hydrocarbon (TPH) were analyzed. It is noteworthy that the analyses were conducted on water samples seasonally from December 2006 to May 2009. Afterwards, through comparison of the results obtained from the forenamed tests and using standard values, the research hypothesis was confirmed. In other words, effluents do penetrate the wells and pollute the underground water.
Ebrahim Fataei,; Seied Masoud Monavari; Amir Hesam Hasani; Seied Ahmad Mirbagheri; Abdoreza Karbasi
Volume 8, Issue 2 , January 2011
Abstract
For assessment of water quality in Gharasou River, located in the Northwest of Iran, multivariate statistical analysis was used. During the period of one year, 18 physical, chemical and microbiological parameters were sampled in 11 sampling stations. The measured data were analyzed by a multivariate ...
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For assessment of water quality in Gharasou River, located in the Northwest of Iran, multivariate statistical analysis was used. During the period of one year, 18 physical, chemical and microbiological parameters were sampled in 11 sampling stations. The measured data were analyzed by a multivariate statistical approach, Cluster Analysis (CA). Based on CA analysis the stations were divided to three groups of highly polluted (HP), moderately polluted (MP), and less polluted (LP) stations. The results of the study revealed that multivariate statistical techniques are an effective statistical method for water quality assessment, identification of pollution sources/factors in water quality for effective water quality management. As Extracted clustered information can be used in reducing the number of sampling sites on the River without missing much information.
Amirhesam Hassani; Fahime Ghanadi; Aghdas Rahimi
Volume 8, Issue 1 , October 2010
Abstract
Many environmental problems are caused by the irregular expansion of Tehran. The most important problems are due to petroleum installations to the south of the Tehran Aquifer, lack of due attention paid to environmental standards, produced by local petroleum companies. The aim of this study is the survey ...
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Many environmental problems are caused by the irregular expansion of Tehran. The most important problems are due to petroleum installations to the south of the Tehran Aquifer, lack of due attention paid to environmental standards, produced by local petroleum companies. The aim of this study is the survey of measure soluble petroleum in Tehran Oil Refinery groundwater. The area of investigation comprises Rey industrial zone with 900 hectares where its drinking water is provided by seven qanats, deep and handy wells, and the Jajrood, Karaj and Kan Rivers. The annual average temperature, rainfall and evaporation are 17 ̊C, 200 mm and 2500 mm, respectively. Hence, sampling from 8 water wells and analysis of the samples were carried out during the summer and winter of 2008-2009. Finally, the results were shown in some figures and compared with national standards. The results of analysis for parameters (such as BOD, COD, oil and grease, phenol, TPHs, aromatic and aliphatic hydrocarbons) are as below: COD(10-55000 mg/L), BOD (1-30555 mg/L), phenol (0.01-0.08 mg/L), oil and grease (5-130 mg/L), TPHs (0.05-25.5 mg/L), aliphatic hydrocarbons (1.7- 0.001 mg/L) ad, aromatic hydrocarbons (0.034-2.13 mg/L). Results show that the quantity of oil pollutants in stations 4 (Bagher Abad), 5 (Esmail Abad) and 3 (Azim Abad) is high compared with the other stations. In other words, the quantity of oil pollutants in Dorsun Abad , Esmail Abad and Azim Abad villages is more than in Kheir Abad, Bagher Abad, Shahr Sang and the western side of Tehran Oil Refinery Company. Also, the concentration of oil pollutants in the winter compared to spring is very high. As a consequence of this investigation, it is obvious that the quality of major water sources is not suitable for drinking or agriculture consumption. In addition, the wastewater produced by Tehran Oil Refinery Company, spills from Tehran’s domestic wastewater channel and leakage from underground oil transfer lines are the most important of sources of pollution in local groundwater resources.
Leyli Gholamhosseini; Arash Javanshir; Amirhesam Hassani
Volume 5, Issue 1 , October 2007
Abstract
Dreissenapolymorpha (Zebra mussel) is a fresh water mollusk and native species of Caspian Sea area. These shells belong to filter feeder class and are able to filter a great volume of water. In this research, due to a wide range of materials available in urban wastewater efficiency of Dreissena polymorpha ...
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Dreissenapolymorpha (Zebra mussel) is a fresh water mollusk and native species of Caspian Sea area. These shells belong to filter feeder class and are able to filter a great volume of water. In this research, due to a wide range of materials available in urban wastewater efficiency of Dreissena polymorpha is studied to reduce concentration of Nitrate and Phosphate. The shell masses in 20, 40 and 60 g were put test for filtration tests and indirect absorption of nitrate and phosphate from artificial wastewater. These tests were performed in open system and were repeated 3-10 times depending on variance range.The results showed that there is a positive correlation between the weight of shell masses and the filtration rate of Nitrate and Phosphate in open system (R2 =0.99) and there is a negative correlation between concentration of Nitrate and Phosphate at the wastewater entry on one side and the filtration rate of nitrate and phosphate on the other side (R2=0.97) (t=2.132, P<0.023). It was found that when the weight of shell masses increase (from 20 to 40 to 60 g), the amount of Nitrate absorption is 0.08-0.2 mg.l-1 while Phosphate is absorbed 0.02-0.04 mg.l-1 in the open system. In this research it was found that Chlorella and Scenedesmus algae are able to reduce concentration of Nitrate (of at least 0.03 to 1.73 mg.l-1) and the Phosphate solved in waste water (of at least 0.42 to 4.48 mg.l-1).
