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Articles by J. Nouri
Total Records ( 15 ) for J. Nouri
  F. Mohsenzadeh , K. Naddafi , J. Nouri and A.A. Babaie
  The bag filters are important equipments in cement factory. In these filters current flow that includes gas and dust cross through the pores are located in the stuff filter and filtrate by that remaining on the bag. Afterward, by dust increase on the bag, the filter is shaken until dust collecting leads to exit hopper. This system in this project is called mechanical method. In order to obtain a better operation after introducing to the operation mechanism, the same steps like create good situation for maintain for maintenance and repairs by consideration on important fragment and appoint minority of stock in the stores, carry out the planning of the maintenance and repairs, improvement of stock mandatory. Then, the pressures were measured in various part of filter system and controlled the pressure drop. By inspection of various kinds of bags used in the filter, 550 g m-2 polyester bags showed a better performance and parameter effective in tearing and wearing of bags which were recognized. Also by installing timer on the shaking system, the shaking periods of bags were increased. In order to increase dust cake layer and better performance of deducting and bags life time. Assessment of operation on a sample bag filters show that the ready operation time of filter was increased about 200% and out put of dust amount decreased to the below of the standard limits.
  G.R. Moosavi , A.R. Mesdaghinia , K. Naddafi , A.H. Mahvi and J. Nouri
  Research was carried out in order to investigate the effect of the organic loading rate on the performance of an up-flow anaerobic/aerobic fixed-bed (UA/AFB) combined reactor. One bench scale UA/AFB combined reactor was constructed to investigate the treatment of high strength wastewater. Reactor was based on the combination of anaerobic and aerobic parts only in a single reactor. It was operated under four different runs in which organic loads were 0.8, 2.3, 4.7 and 7.6 kg COD/m3 d, respectively. It was found that the total HRT 9 h (5 h as anaerobic and 4 h as aerobic) is long enough to obtain efficient removal of COD more than 95% at all of runs. Also, investigated reactor showed high ability to control organic loads. Based on the observed results, the use of UA/AFB reactor in practice seems to be a potential biotechnology for treatment of industrial wastewater contain high organic load.
  G.H.R. Jahed Khaniki , M. Yunesian , K. Naddafi , J. Nouri and M. Ali Mohammadi
  Phthalates are present in almost all plastic equipments. Phthalates are not chemically but only physically bound to the polymer chains, they may be leached into food and beverages from the packaging material. A study was determined DBP and DEHP release into water stored in plastic tumblers at different temperatures and times. Thirty five disposable plastic tumblers with 200 mL volume, which have manufactured for water and beverages, bought from plastic market. Then, deionized water with different degrees (10 and 80°C) was added into disposable plastic tumblers for a period of 10, 20 and 60 min. Extraction was done and all analyses were carried out on a HPLC system with UV detector. Results showed that the maximum of DBP and DEHP contents into water stored in disposable plastic tumblers are 1.5±0.48 and 0.15±0.08 μg L-1, respectively. Stored hot water with 80°C for 60 min had the highest concentrations of DBP in the other groups of water samples. It was showed that released DBP into water samples has increased at high temperatures and longer period. Also, there was a significant difference in DBP contents in stored water with 10°C for 10 min (p<0.023) and DEHP contents in stored water with 80°C for 20 min (p<0.023), while there wasn`t a significant difference in other DBP and DEHP contents in water samples (p>0.05). It was concluded that released DBP and DEHP levels into water samples has increased at high temperatures and longer times. Therefore, it can have been some concerns about the release of DBP and DEHP from plastic tumblers into hot drinks for consumer.
  J. Nouri , B. J. Alloway and P.J. Peterson
  A sludge was conducted to attain the chemical extractability and mobility of Ni63 in soil and sludge. The results of this sludge showed a variation in extractable Ni63 activity with different incubation times. The extractions from the spread columns within increase in time showed, the amount of water soluble Ni63 in the soil, sludge and soil mixtures decreased significantly. The percentage removal of organically bound Ni63 by DTPA varied during the eight weeks, while EDTA showed a higher percentage of removal with a correlation with plant uptake. In some cases water decreased the solubility of Ni63 with increasing time in soil, sludge and mixture columns. Organic matter also decreased the Ni63 concentrations in all mixtures. Nitric acid digestion was used as a method of total recovery of Ni63 from all columns and 86-94% of the initial Ni63 was recovered in leachates from the soil and soil/sludge mixtures a greater proportion of cationic species of Ni63 than non cationic special were present, but in the sludge only leachates the reverse was true after 8 weeks. Organic matter content of soil increased by incorporation of sewage sludge may help to reduce the mobility of nickel.
  J. Nouri , B. J. Alloway and P.J. Peterson
  An experiment over a period of 14 months was carried out on duplicate undisturbed cores of 3 soils, with different textures using one sludge in order to obtain more information on the vertical movement of heavy metals through sludge treated soil. Over the first 8 months the pH values were in this order : sandy silt loam > sandy clay> loamy sand of both control and sludge amended soils. The rainwater pH values during the first 8 months were acidic, but during the following six months, they increased loan alkaline value. At the end weathering, it was found that only the amended surface and upper layers contained elevated concentrations of heavy metals. Thus the nature of soil was an extremely important factor in the downward movement of constituents. It appears that a guideline for sludge application to land the pH of soils should be maintained at or above 6.5. Groundwater pollution was likely to be the greatest in highly permeable sandy soils and these should not be used for the application of heavy metals. Soil water influenced the chemistry of surface waters and this affected the survival of fresh water fauna and flora.
  J. Nouri , P. J. Peterson and B. J. Alloway
  Increasing the metal concentrations by amending the sewage sludge increased the metal content in barley leaves. The yield of the 100 % sludge was the lowest and the soil pH was lowered as well. With the increase in time, the metal removal by plants is also increased. Chromium in barley behaved differently to the other metals studied, showing a declination with time. High voltage application of soluble chromium in solution culture resulted in decreased concentration of nitrogen, phosphorous, potassium , copper, iron, magnesium and zinc in barley and produced toxic effects and reduced growth. The metal uptake by plants from sludge amended soil was influenced by time of harvesting and stage of growth.
  J. Nouri , R. Nabizadeh , M. Younesian , H.A. Norouzi and S.M. Tehrani
  Environmental and health impact assessment of Hamadan wastewater treatment plants were studied for the treatment of wastewater produced at Hamadan, Bahar and Lalejin Cities, with the population of about one millions. In this study, a new method of EIA applied, using Leopold Matrix 3 dimensions to predict the negative and positive impacts of the project activities on environmental factors. After the data collection, processing and analyzing, Adkins and Burks check list along with new 3-dimensional Leopold Matrix were applied. This 3-dimensional method was a new method which was applied in this study for the first time in Iran. The scaling-ranking checklist was also applied which is a suitable approach for determination of intensity and importance of environmental impacts. The results obtained from this investigation showed that execution of the wastewater treatment plant could have some negative impacts, but may contain some important positive impacts particularly on the improvement of health conditions and environmental quality in the proposed project area. The mitigation measures have also been noticed for the project and in this regard some major management approaches were proposed at the construction and operational phases.
  J. Nouri , B. J. Alloway and P.J. Peterson
  Duplicate (250g) samples of air dried sewage sludge / mixtures in different percentages were placed in sintered glass to conduct a study of the mobility of heavy metals in soil amended with sewage sludge. The pH values of saturation extracts showed an increase in all sample mixtures up to 3rd month. The concentrations of nickel in the extracts were higher than those of cadmium and lead. There was a marked depletion in levels of metals with time, thus showing that the greatest release of metals occurred in the early stages after mixing probably due to the flushing out of the initial soluble forms already present in sludge. Another possibility could be that the decrease in metal concentrations with time could be due to the development of anaerobiosis.
  J. Nouri and F. Toofanian
  Post-harvest management of onions and potatoes is a sever problem in Iran. In this regard a research project of radiation preservation of root crops was carried out. Ten tones of red variety of onions and pashandi variety of potatoes were used every year of the trial. Bulbs were irradiated at a dose of 0.10 kGy and stored along with the unirradiated controls, at low temperature and under ambient conditions for a period of more than 7 months. After 4 months of storage under ambient conditions, the rotting ranged from 1 to 15% in irradiated onions and 5 to 64% in unirradiated samples. The unirradiated potatoes were discarded after 6 months of storage, because of heavy sprouting and rotting. It was found that losses through dehydration were 9.4 to 14.9% in the irradiated potatoes. Also a comparative study of reducing and non-reducing sugars, vitamin-C contents, total sugar, starch and protein was carried out between control and irradiated samples. The percentage weight loss varied between 25 to 36% after 6 months of storage in the irradiated onions and 18 to 29% for untreated samples.
  J. Nouri , B. J. Alloway and P.J. Peterson
  A number of extractions were carried out on soils, in order to assess both the relative concentrations of metals available to plants and also the major forms in which these metals existed in soils. The objective of this study was to assess the quantity and forms of metals in different soils, sludge and soils amended with sludge. It seemed that initially each metal will respond differently after incorporation into the soil system. There was a greater fraction of soluble metals in the sludge amended soils than the controls. Micro-organisms might, by using organic and inorganic matter as source of carbon and energy, bring about oxidation and reduction sufficient to change the state of metals.
  J. Nouri and S. Malmasi
  In this study, a innovative model was developed for impact assessment for urban development project. The proposed model has the capability of zoning the impacts according to integration of vulnerability for the selected environmental factors within impacts criterion in this study. The main process for this model consists of identification of urban development project activities, determination and zoning of impacts intensity, calculation of environmental vulnerability factor and decision making on proposed alternatives. The integration of results for the mentioned stages will determine the final assessment zoning. This model was applied to urban development plan in district-22 of Tehran municipality (Iranian capital city) as a case study. The results indicate that the model was applicable for zoning of impacts according to the characteristics of affected environmental and ecological factors as well as determining major impacts units. Meanwhile, this model was capable to select alternatives of urban development plan for decision makers. Finally planners will find out the necessary mitigation measures which should be implemented in each impact unit.
  J. Nouri , A. Gharagozlou , A. Nourifard and S.M. Tehrani
  Like many other cities, Tehran is experiencing the increasing pressure of improper land use and incorrect land management policies which have exacerbated the problems by disregarding the limitations and potential of land and its vulnerability and fragility against possible changes. The implementation of suggested plans and projects will be carried out for north-western of Tehran, such as the establishment of the west urban man made lake as the largest man made lake of Iran, based on the detailed feasibility studies. In the present study, on Environmental Impact Assessment study (EIA) for the largest man made lake in Iran by using environmental modeling and using overlay method in Geographic Information Systems (GIS) with a land use planning approach and regards to the ecological environment and by considering the results of satellite image processing was performed. The area observed is in north-western of Tehran, a region of about 10, 000 ha, which is restricted by the Alborz mountain chain in the north. This study aims at considering major changes on human environments, caused by proposed project execution in the north-western of Tehran by using satellite data. Then, by using environmental modeling and using GIS and overlay method for using environmental impact assessment analysis, decision can be made based on the capacities and environmental balances of the area by applying the results of different analyses in GIS, regarding whether the projects are operational and where is the best location for making the largest man made lake of Iran and how they could be improved. The socio-economic and cultural situation of the District-22 has also been described. The interactive effects of the activities and suggested actions of the implementation of the plan have been specified during the constructional and operational phases. Finally, the strategic and management plans for the location of man made lake and environmental impact assessment of the man made lake in north western part of Tehran are presented by considering the overlay analysis results and proper actions are suggested to reduce the negative effects.
  J. Nouri , M. Jafarinia , K. Naddafi , R. Nabizadeh , A.H. Mahvi and N. Nouri
  Energy recovery in wastewater treatment plant is one of the ways to lowering operation costs. The research was conducted in Tabriz wastewater treatment plant, at the north west of Iran in 2004 which has a design capacity of 1.5 m3s-1 wastewater. The main focus of the research was on methane production potential of domestic wastewater. During this study which lasted 6 month`s energy consumer units of plant were reviewed. Wastewater flow rate (Q), BOD and bCOD of wastewater in three points, plant influent, primary settling effluent and plant effluent, were tested. The potential of methane production were also estimated and converted to electrical energy. The results showed that by optimization of methane production and energy consumption in different units of plant, it is possible to provide 97% of plant electrical energy and all of another form of energy as heat.
  J. Nouri , P.J. Peterson and B.J. Alloway
  A study describing the accumulation of Ni63 in leaves of maize grown in various soil / sludge mixtures was conducted to evaluate the gross distribution and chemical forms of Ni63 following absorption and translocation. The study demonstrated the presence of anionic nickel complexes Ni63 in maize leaves indicating that nickel in plant may be species dependant. The electrophoresis results showed, Ni63 associated with chlorophyll. High levels of nickel concentration occurring after sludge application could contribute to the destruction of this pigment. With an increased incubation time Ni-Spiked soil and soil / sludge mixtures decreased. The nickel concentration, thus the amount of sludge present influences the uptake of inorganic nickel by plants. Greater sludge application may cause phytotoxic effects on crops, so that the concentration of nickel and phytotoxic heavy metals in sewage sludge should be monitored. The amount of nickel in the soil plant system was found to change with time as did the soluble nickel complexes in plants, which are of interest and importance to animal and human nutritionists.
  D. Naghipoor Khalkhaliani , A.R. Mesdaghinia , A.H. Mahvi , J. Nouri and F. Vaezi
  This study provides an evaluation of EDTA solution for the removal of lead, zinc and cadmium from a contaminated soil. The field soil contained 68% sand, 12% clay and 20% silt. The performance of EDTA for the treatment of soil contaminated with heavy metals was evaluated in this study. Soil samples containing variable levels of Pb, Zn, Cd were subjected to Ethylene Diamin Tetra-acetic Acid (EDTA) treatment and the extraction of heavy metals was found to vary, ranging from 54.5 to 100%. Thus the feasibility of soil washing for the decontaminated sandy-loam soil with single and several metals were evaluated in laboratory-scale batch experiments. Of the washing reagent test, Na2- EDTA 0.1 M solutions were generally more effective for removing heavy metals from soils. Na2-EDTA 0.1M preferentially extracted lead over cadmium and zinc. The most efficient washing occurred using the 0.1M EDTA at the lowest pH.
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