توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱DROP–IMPACT ANALYSIS OF TV MODEL AND THE EFFECT OF SOME DESIGN PARAMETERS ON ITS ELECTRONIC COMPONENTS
نویسنده(ها): ، ،
اطلاعات انتشار: سیزدهمین کنفرانس سالانه مهندسی مکانیک، سال
تعداد صفحات: ۸
Modeling the transient drop analysis for a TV in protective crushable foams is considered in this work. The modeling process of different parts and important issues related to them is described in details. Next, the analysis was focused on the effect of two important parameters, namely foam thickness and foam density, on the maximum stress of the TV shell and the board chip. The analysis showed that increasing the foam thickness could protect the TV set from damage. However, this effect is noticeable up to a certain level and after that is not economical. The results also indicated that decreasing the foam density could reduce the maximum stress on TV set by absorbing more energy during impact.<\div>

۲Multi–Agent Framework For Hazardous Goods Transport Risk Management
نویسنده(ها): ، ، ، ،
اطلاعات انتشار: International Journal Of Information Science And Management، هشتم،شماره۲، ۲۰۱۰، سال
تعداد صفحات: ۸
It is difficult to prevent accidents in the transport of hazardous goods, so the development of strategies for managing crisis situations and the optimization of action plans are important. The crisis situation is a continuous event in time when its evolution is unpredictable because it depends on a whole of complex factors resulting from the environment of the crisis. Decision making in crisis situation is complicated because it depends on a set of distributed actors in the environment where each one with its own perception of the problem. The continuous evolution of a crisis situation and the need of cooperation between the actors make the optimal decision making difficult. The aim of this work is the development of decision support system “DSS” to assist actors in crisis situation in order to anticipate the evolution of an incident and to determine the effectiveness of strategies used and the allocated material. The proposed DSS is based on a multi–agent system “MAS” used for the reproduction of collective and multi–actor decision–making scenarios. Our system receives accident’s alerts from GOST “platform for tracking hazardous material containers in real time”. This paper presents the proposed model for managing the risk of transporting hazardous goods.

۳Geometric morphometric analysis of the second upper molar of the genus Apodemus (Muridae: Rodentia) in Northern Iran
نویسنده(ها): ،
اطلاعات انتشار: Iranian journal of animal biosystematics، ششم،شماره۲، ۲۰۱۰، سال
تعداد صفحات: ۱۲
Wood mice of the genus Apodemus are widespread in temperate areas of the Palaearctic region. Dental shape variation and morphological differences among three species of Apodemus (A. witherbyi, A. hyrcanicus, A. uralensis) were investigated using outline–based geometric morphometrics of the second upper molar (M2\) and a morphological study of 92 museum specimens belonging to five populations of Apodemus in northern Iran (East Azerbaijan, Khorasan, Tehran, Golestan, and Noor) were analyzed and identified. All species were distinguishable by the shape of the second upper molar (M2\). The Noor population was identified as A. hyrcanicus, and the Khorasan, Tehran, East Azerbaijan populations overlap with specimens of A. witherbyi and are differentiated from A. uralensis and A. hyrcanicus. Two species (A. hyrcanicus and A. witherbyi) were detected in the population from Golestan. Morphological traits could not separate A. uralensis from A. witherbyi, and according to the results of canonical variate analysis (CVA), only A. hyrcanicus is separate from the other two studied species.

۴Aphid parasitoids (Hymenoptera: Braconidae: Aphidiinae) and their tritrophic relationships in Kerman province, Southeastern Iran
نویسنده(ها): ، ، ، ،
اطلاعات انتشار: Iranian journal of animal biosystematics، هشتم،شماره۱، ۲۰۱۲، سال
تعداد صفحات: ۱۴
Aphid parasitoids (Braconidae: Aphidiinae) in several localities of Kerman province, Southeastern Iran were studied between 2007 and 2008 and 20 species belonging to eight genera were identified. Parasitoids were reared from 25 field–collected aphid species occurring on 31 host plant species. In the present study, 83 parasitoid–aphid–plant associations, their aphid hosts, and the respective host plants were determined. Nineteen species (except Lysiphlebus fabarum (Marshall, 1896)) were new records for Kerman province and two species (Praon flavinode (Haliday, 1833) and Praon unitum Mescheloff and Rosen, 1988) were new records for Iran. An illustrated identification key to species is presented.

۵Mitochondrial DNA (CYTB) divergences in two distinct, Old World and New World Barn Owls
نویسنده(ها): ، ، ،
اطلاعات انتشار: Iranian journal of animal biosystematics، هشتم،شماره۱، ۲۰۱۲، سال
تعداد صفحات: ۱۰
The Barn Owl, Tyto alba (Scopoli, 1769), occurs worldwide and shows a considerable amount of morphological and geographical variation, leading to the recognition of many subspecies around the world. Yet comprehensive study on this species needs to be done. Data from mitochondrial gene (CYTB) with 620bp length is analyzed for 30 individuals around the world. Maximum likelihood (ML), maximum parsimony (MP) and bayesiananalysis showed considerable genetic variation between alba clade (Old World) and furcata clade (New World). The amounts of genetic variation within each of these clades are in ranges from 0.4%–1.6% but variation between clades is 7.21%. This data may suggest that Barn Owls of the Old World were a separate species from those of the New World. We found high amount of genetic variation between T. a. stertens from Indonesia and alba clade and we didn’t find any support for recognition of T. bargei as a separate species.

۶A new record of Allactaga euphratica from Ilam province, West of Iran
نویسنده(ها): ، ، ، ، ، ، ،
اطلاعات انتشار: Iranian journal of animal biosystematics، هشتم،شماره۱، ۲۰۱۲، سال
تعداد صفحات: ۴
The five–toed Jerboa genus Allactaga includes 12 morphospecies, the majority of which were described in the 19th century. Five morphospecies are native to Iran, including A. elater (Lichtenstein, 1828), A. williamsi Thomas, 1897, A. hotsoni Thomas, 1920, A. firouzi Womochel, 1978, and A. toussi Darvish et al., 2008. However, Shenbrot (2009) determined, by multivariate analysis, that A. firouzi is synonymous with A. hotsoni. Attallah and Harrison (1968) demonstrated that A. euphratica Thomas, 1881, and A. williamsi are conspecific. They reduced A. williamsi to subspecific status under A. euphratica, based on the examination of external and cranial characters. Recent data have shown that A. euphratica and A. williamsi are two distinct species (Colak and Yigit, 1998). The presence of A. euphratica has been reported in Iraq, Kuwait, Saudi Arabia, Jordan, and Syria (Abi–Said, 2004). It is probable that A. euphratica is present in southwestern Iran (KryŠtufek and Vohralik, 2005).

۷A checklist of Ichneumonidae (Hymenoptera: Ichneumonoidea) from Iran
نویسنده(ها): ، ، ، ، ،
اطلاعات انتشار: Iranian journal of animal biosystematics، هشتم،شماره۲، ۲۰۱۲، سال
تعداد صفحات: ۵۰

۸New Record of Ophiomorus maranjabensis Kazemi, Farhadi Qomi, Kami and Anderson, 2011 (Sauria: Scincidae) from Isfahan Province, Iran
نویسنده(ها): ، ، ، ، ، ،
اطلاعات انتشار: Iranian journal of animal biosystematics، هشتم،شماره۲، ۲۰۱۲، سال
تعداد صفحات: ۴
Ophiomorus maranjabensis is a rare scincid lizard which has already been collected from two localities. The first record is from name of locality (Kazemi et al. 2011). Kazemi and his collegues 2011 described this skink as a new species by three collected specimens from N 34°19’52.78”, E 51°53’20.44” and N 34°18’56.50”, E 51°52’45.15”, Maranjab, south of Daryache Namak, Iran (Fig. 1). Our study presented one new record of this species and its habitat in Isfahan Province for the first time.

۹Karyotypes of the Mole Rats, genus Nannospalax (Palmer, 1903) (Spalacidae: Rodentia) populations in eastern Anatolia, Turkey
نویسنده(ها): ، ، ، ، ، ، ، ، ، ، ، ، ، ،
اطلاعات انتشار: Iranian journal of animal biosystematics، هشتم،شماره۲، ۲۰۱۲، سال
تعداد صفحات: ۱۷

۱۰Fuels Price Structuring : A Tool for Integration of Environmental Concerns into Energy Sector
نویسنده(ها): ، ، ، ،
اطلاعات انتشار: International Journal Of Environmental Research، اول،شماره۴، Autuman ۲۰۰۷، سال
تعداد صفحات: ۱۰

۱۱Fuels Price Structuring : A Tool for Integration of Environmental Concerns into Energy Sector
نویسنده(ها): ، ، ، ،
اطلاعات انتشار: International Journal Of Environmental Research، اول،شماره۴، Autuman ۲۰۰۷، سال
تعداد صفحات: ۱۰

۱۲X –injective and X–projective complexes
نویسنده(ها): ، ، ، ، ،
اطلاعات انتشار: Bulletin of Iranian Mathematical Society، چهل و دوم،شماره۵(پياپي ۱۰۴)، ۲۰۱۶، سال
تعداد صفحات: ۱۵
Let X be a class of R–modules‎. ‎In this paper‎, ‎we investigate \;X–injective (projective) and DG–X–injective (projective) complexes which are generalizations of injective (projective) and DG–injecti‎‎ve (projective) complexes‎. ‎We prove that some known results can be extended to the class of \;X–injective (projective) and DG–X –injective (projective) complexes for this general settings.

۱۳Multi–Criteria Decision–based Model for Road Network Process
نویسنده(ها): ، ، ، ،
اطلاعات انتشار: International Journal Of Environmental Research، چهارم،شماره۴، Autumn۲۰۱۰، سال
تعداد صفحات: ۱۰
This paper addresses a multi–criteria decision based methodology to develop a road network cost function for route finding analysis in a Geographic Information System (GIS). Over the years, several studies relating to route planning process in GIS and Intelligent Transportation Systems (ITS) have been conducted, most of which rely on the use of one–dimensional variables like distance or time as a cost function. This paper, in contrast, investigates multi–dimensional variables to define the cost function using a multicriteria decision making approach. To this end, first additional realistic variables which have quantitative as well as qualitative characteristics are taken into account. These include climate, sight–seeing information, road type, and so on. Second, they are combined using a Multi–Dimensional Cost Model (MDCM) using the Analytical Hierarchical Process (AHP). The models developed were implemented and closely evaluated in northern parts of Iran. The resulting routs showed to be more accurate than those obtained utilizing one–dimensional cost functions.

۱۴Equilibrium and Kinetic Studies on Sorption of Malachite Green using Hydrilla Verticillata Biomass
نویسنده(ها): ، ، ، ، ، ،
اطلاعات انتشار: International Journal Of Environmental Research، چهارم،شماره۴، Autumn۲۰۱۰، سال
تعداد صفحات: ۸
In the present study, Hydrilla verticillata biomass was investigated as a novel biosorbent for the uptake of basic dye malachite green from its aqueous solution. Kinetic and equilibrium studies were carried out in batch process. Batch adsorption experiments were conducted to study the effect of pH, temperature, sorbent dosage, initial dye concentration, and contact time for the removal malachite green dye. The dye uptake was maximum for the initial pH of 8, temperature of 30oC, sorbent dosage of 0.55g, initial dye concentration 200mg\l and contact time – 150 min. The kinetic studies were well modeled using pseudo first order and second order with isotherm studies.

۱۵3D Open Channel Flow Modeling by Applying 1D Adjustment
نویسنده(ها): ، ، ، ، ،
اطلاعات انتشار: International Journal Of Environmental Research، پنجم،شماره۲، Spring ۲۰۱۱، سال
تعداد صفحات: ۱۴
A three–dimensional (3D) finite volume model with a novel adjustment scheme was developed to solve shallow water equations in open channels. An explicit finite volume method was used to discretize the governing equations in a boundary–fitted structured and collocated grid system. Because a simple second–order central scheme was used for spatial discretization and due to the occurrence of high Peclet numbers in open channel flows, some treatments were needed to reduce oscillation. Thus, a special adjustment scheme designed to minimize differences in the averaged free surface elevation and flow discharge in a 3D model and 1D flow data was applied to some cross–sections. The model was applied to simulate shallow water flow in a backwardfacing step, a meandering channel with 90° bends and a 180° bend channel. A comparison of the model results with available experimental and numerical data illustrated that the proposed numerical procedure decreases the numerical oscillations and increases the stability of the 3D numerical model in open channel flow modeling.

۱۶A Comparison Between Aluminum and Iron Electrodes on Removal of Phosphate from Aqueous Solutions by Electrocoagulation Process
نویسنده(ها): ، ، ، ، ،
اطلاعات انتشار: International Journal Of Environmental Research، پنجم،شماره۲، Spring ۲۰۱۱، سال
تعداد صفحات: ۱۰
This study presents a comparison between aluminum and iron plate electrodes on phosphate removal from aqueous solutions by electrocoagulation process. The effectiveness of main operational parameters such as initial pH, initial phosphate concentration and current density were examined. In addition, treated solution and sludge characteristics, energy consumption and electrode mass depletion were compared for both electrodes. All experiments were done in an electrocoagulation cell with effective volume of 2 liters. It was found that the aluminum electrode has higher removal efficiency compared to the iron electrode in the same operational conditions. Phosphate removal efficiencies of 100% and 84.7% were observed for aluminum and iron electrode in a special case with optimum initial pH, maximum current density and maximum initial phosphate concentration equal to 3, 250A\m2, 400mg\l PO4 3– , respectively. Furthermore, less treated solution turbidity, higher secondary pollution (remained Al) and less electrode mass depletion was observed for the aluminum electrode.

۱۷Preparation of a Chelating Resin and its Application as a Preconcentration System for Determination of Cadmium in River Water by Flow Injection Analysis
نویسنده(ها): ، ، ، ، ، ، ،
اطلاعات انتشار: International Journal Of Environmental Research، پنجم،شماره۲، Spring ۲۰۱۱، سال
تعداد صفحات: ۶
A chelating resin of polystyrene divinylbenzene resin functionalized by 1–(2–pyridylazo) 2– naphtol (PSDVB–PAN) has been synthesized and its sorption properties have been investigated for preconcentration and determination of cadmium at μg\L level by flame atomic absorption spectrometry. The procedure is based on the sorption of Cd(II) ions on a minicolumn of synthesized chelating resin. The retained cadmium ions can be quickly eluted from sorbent material, with the eluent stream consisting of nitric acid solution, directly to the nebulizer burner system of the flame atomic absorption spectrometer. The sorption capacity of PSDVB–PAN was found to be 7.5 mg\g at optimum pH and the chelating resin showed rapid kinetic sorption. The sorption equilibrium of Cd(II) on synthesized chelating resin was achieved just in 15 minutes. Parameters such as the pH effect on the cadmium sorption, sample volume, the sorption capacity of resin, the cadmium desorption from the resin and the analytical characteristics of the procedure were studied for the quantitative recoveries of the analyte ions. The developed system allowed a throughput rate of 15 samples h–1 with a detection limit of 1.5 μg\L. Relative standard deviation for 5 replicated injections of 50 μg\ L was 1.8%. This procedure was applied for cadmium determination in river water samples collected from Citarum River, West Java, Indonesia.

۱۸Impact of a Mixed Industrial and Domestic Wastewater Effluent on the Southern Coastal Sediments of Sfax (Tunisia) in the Mediterranean Sea
نویسنده(ها): ، ، ، ، ، ، ، ، ،
اطلاعات انتشار: International Journal Of Environmental Research، پنجم،شماره۳، Summer ۲۰۱۱، سال
تعداد صفحات: ۱۴
Concentrations of Zn, Cu, Cr, Cd, Pb and Fe in surface marine sediments of the southern coast of Sfax were studied in order to understand current metal contamination at the outlet of a mixed industrial and domestic wastewater effluent discharged into the seawater since 1953. We found that heavy metal concentrations (mg\kg dry weight) in surface marine sediments varied from 42 to 391 for Zn, 15 to 44 for Cu, 44 to 137 for Cr, 6 to 56 for Cd, 19 to 59 for Pb and 52344 to 54543 for Fe. The computed metal enrichment factors (EF) in the sediments showed that EF of Zn ranged from 0.49 to 9.13, EF of Cu from 0.35 to 3.04, EF of Cr from 0.3 to 3.05, EF of Cd from 0.63 to 9.37 and EF of Pb from 0.43 to 3. All heavy metals were characterized by maxima EF values greater than 1.5, indicating a considerable metallic pollution of the study area. The PCA analysis revealed two distinct groups: (i) the first group (G1) is representative of Fe selected as natural tracer and (ii) the second group (G2) is articulated around Zn, Cu, Cr, Cd and Pb. These metals which did not show any correlations with Fe of the first group imply a significantly impact of the selected wastewater effluent. The calculation of the geoaccumulation index (Igeo) showed that all analyzed metals (except for Fe) can be considered as moderate to extreme pollutants. The microbial analysis of seawater samples and also of both water and sediment samples collected from the Sfax solar saltern (placed at the vicinity of the outlet of the selected effluent) showed that no indicator germs of contamination (total coliforms, faecal coliforms and faecal streptococci) were detected.

۱۹Effects of Daphnia magna fed with B group vitamins–enriched Chlorella sp. and Scenedesmus obliquus on the growth rate of Rutilus frisii kutum fry
نویسنده(ها): ، ، ، ، ، ، ، ، ،
اطلاعات انتشار: International Journal Of Environmental Research، پنجم،شماره۳، Summer ۲۰۱۱، سال
تعداد صفحات: ۶
Currently, white fish or Kutum Rutilus frisii is considered to be a good candidate for commercial aquaculture. However, little information is available regarding the nutritional requirement of this fish fry. Experiments were conducted to examine the effects Daphnia magna as live food cultured on two freshwater green algae, Chlorella sp. and Scenedesmus obliquus enriched with different B group vitamin dosages (0.00 as control, 0.50, 1.00 and 2.00 mL of enriching solution per liter of algae culture medium) on the growth and survival rates of Rutilus frisii kutum fry. Results demonstrated that increasing in B group vitamin dosages are caused an increasing in nutritional value (Kcal) of two freshwater green algae species Chlorella sp. and Scenedesmus obliquus significantly. Significant differences were observed in BWG (%) and SGR between different vitamins treatments both the fed Daphnia magna cultured on Chlorella sp. and Scenedesmus obliquus enriched (P0.05) but not in survival percentage (P>0.05).

۲۰Toxic Effects of Acute Exposure of Diazinon in turbot (Psetta maxima) Early Life Stage (ELS)
نویسنده(ها): ، ، ،
اطلاعات انتشار: International Journal Of Environmental Research، ششم،شماره۱، Winter ۲۰۱۲، سال
تعداد صفحات: ۶
In the present study, the toxic effects on the embryos and larvae of the turbot were used as a model to investigate the diazinon, which contaminates aquatic ecosystems. The number of dead embryos significantly increased in response to diazinon concentrations 0.2, 0.4, 0.8, 1.6, 3.2, and 7.4 mg\L. The 48h LC50 value of diazinon for turbot embryos was estimated at 1.85 mg\L. Dose–response decreases in hatching success were recorded as 97, 92.4, 80.3, 60.3, 38.7 and 27.1%, respectively. The number of dead larvae significantly increased with increasing diazinon concentrations exposed for 24–96 h (p 0.05). The 24, 48, 72 and 96h LC50 values of diazinon for turbot larvae were estimated at 4.8 (6.4–5.12), 3.3 (4.73–2.52), 2.1 (3.29– 1.65) and 1.23 (0.87–2.38) mg\L, respectively. There were significant differences in the LC50 values obtained at different exposure times (p 0.05). Diazinon caused lethal toxicity as well as nonlethal malformations during embryo–larvae development.

۲۱Long term Evaluation of the Effect of Salinity on Organic Removal and Ammonium Oxidation in a down–flow Hanging Sponge Reactor
نویسنده(ها): ، ، ، ، ، ، ، ، ، ،
اطلاعات انتشار: International Journal Of Environmental Research، ششم،شماره۲، Spring ۲۰۱۲، سال
تعداد صفحات: ۶
The effect of salinity on organic removal and ammonium oxidation in a down–flow hanging sponge reactor was investigated by conducting a long–term continuous experiment over a period of 800 days. The DHS reactor, constructed by connecting three identical units, was fed with artificial wastewater containing 500 mg–N\L of ammonium nitrogen and 1400 mg– COD\L of phenol. Salinity of the influent was controlled by the addition of 8.0 to 25 g–Cl–\L of NaCl. The DHS reactor was operated at a hydraulic retention time of 12 h in a temperature controlled room at 25oC. No significant inhibition of organic removal and ammonium oxidation was observed at salinities of up to 20 g–Cl–\L, at which levels ammonium oxidation and COD removal both exceeded 90%, respectively. However, at a salinity of 25 g–Cl–\L, organic removal and ammonium oxidation were both severely inhibited. In addition, the ratio of effluent nitrite nitrogen to influent ammonium nitrogen increased from 3.4% at salinities of 8.0 g–Cl–\L to 33% at salinities of 20 g–Cl–\L.

۲۲Enzymatic Pre–Hydrolysis of high fat Content Dairy Wastewater as a Pretreatment for Anaerobic Digestion
نویسنده(ها): ، ، ، ، ، ، ،
اطلاعات انتشار: International Journal Of Environmental Research، ششم،شماره۲، Spring ۲۰۱۲، سال
تعداد صفحات: ۶
Enzymatic extract preparation from Pseudomonas aeruginosa KM110 under accession No. HQ730879 with lipase activity (0.3 U\ml), was used to perform enzymatic hydrolysis pretreatment of a synthetic dairy wastewater with 1000 mg\L total fat content. The pretreatment was optimized for 48 h hydrolysis time, at 45æ% C with 10% v\v enzymatic extract. The biological treatment of synthetic dairy wastewater was investigated using a batch bioreactor. Both raw and prehydrolyzed wastewater was digested in a batch bioreactor. Enhanced anaerobic digestion efficiency compare to raw wastewater was achieved (chemical oxygen demand (COD), removal efficiency of 90% vs. 66% and biogas production of 4710 ml vs. 2330 ml after 13days). The results obtained in this study illustrated that the application of a pretreatment process to hydrolyze and dissolve fats may improve the biological degradation of fatty wastewaters, accelerating the process and reducing time of anaerobic digestion. Moreover, the pretreatment of wastewater from several sources is a new and promising application for lipases.

۲۳Electricity Generation from Leachate Treatment Plant
نویسنده(ها): ، ، ، ، ، ، ، ، ، ، ،
اطلاعات انتشار: International Journal Of Environmental Research، ششم،شماره۲، Spring ۲۰۱۲، سال
تعداد صفحات: ۶
Tehran has a population of over 12 million and produces more than 7500 tons of waste every day. Tehran’s municipal solid waste is processed and landfilled at Kahrizak disposal center. Due to inappropriate waste management, a lake with a leachate volume of 180,000m3 has been formed. To solve this problem a leachate treatment plant is currently under construction. A byproduct of leachate treatment is biogas. In this study, the feasibility of electricity generation using biogas has been investigated. Considering that 68.81% of the waste is degradable, the produced leachate has a high organic load (COD = 53900 mg\L and BOD = 34400mg\L). The results showed that a power plant with a capacity of 1.8 MW could be constructed in the site. This electricity can be utilized in Kahrizak Disposal Site and also sold to the network (10 US cents\ kilowatt). Financial analysis using ProForm software shows 1.3 years of payback period and emission reduction of carbon dioxide equal to 5752 tones\year in comparison with the natural gas power plant. Therefore this project is financially feasible for private investors with internal rate of return equal to 77% or more.

۲۴Effect of pH on the Degradation of Aqueous Organophosphate (methylparathion) in Wastewater by Ozonation
نویسنده(ها): ، ، ، ، ،
اطلاعات انتشار: International Journal Of Environmental Research، ششم،شماره۲، Spring ۲۰۱۲، سال
تعداد صفحات: ۸
Degradation of O,O–dimethyl –O–4–nitrophenylphosphorothioate (methylparathion) by ozonation in aqueous solution was studied in a batch reactor under constant ozone dosage and variable pH conditions. The effectiveness of the process was estimated based on the degree of COD (chemical oxygen demand) reduction and conversion of methylparathion. It was observed that ozonation is more effective at alkaline reaction of medium than other conditions. The degree of methylparathion conversion achieved after 120 minutes of the process at pH 9 was 98% compared to 81% and 60% at pH 7 and 3, respectively. Another parameter used to quantify the methylparathion during ozonation was the pseudo first order rate constant k (1\min). Results showed that the rate constant of the process was approximately much higher at pH 9 compared to pH 7 and 3. A significant improvement in chemical oxygen demand removal was observed at pH above 7. At pH 9, the reduction in chemical oxygen demand at the end of the process reached 93%. The methylparathion degradation intermediate products were analyzed by gas chromatography–mass spectrometry (GC–MS). The main intermediate product was p–nitrophenol. The result of the study concludes that ozonation is an effective process for the treatment of organophosphate (methylparathion) contaminated wastewater.

۲۵Evaluating the Effects of Fertilizers on Bioavailable Metallic Pollution of soils, Case study of Sistan farms,
نویسنده(ها): ، ، ، ، ، ، ، ، ،
اطلاعات انتشار: International Journal Of Environmental Research، ششم،شماره۲، Spring ۲۰۱۲، سال
تعداد صفحات: ۶
Present study determines not only the total amounts of metals (Cr, Cu and Pb) in superficial agricultural soil of Sistan area in Eastern Iran, but also the chemical partitioning of these elements in seven statistically selected cases. The analysis was run for local soil, soil treated by non–contaminated organic, compost and chemical fertilizers as well as soil treated by metal–contaminated fertilizers. The sampling campaign was done in Zabol University research farm in 2009. The grab samples were taken from seven different cases, the chemical partitioning analysis was performed and metallic concentrations were detected using FAAS. It may be concluded that the bioaccessibility of metals Cu and Cr would be increased in case of imposed contamination where the soil is treated with all three kinds of fertilizers. Although a relatively similar distribution pattern is seen between anthropogenic and geopogenic portions of bulk concentration in all three kinds of fertilizers, chemical fertilizer seems to manifest a more risky condition. According to the results achieved by cluster analysis, a close correlation exists between Cu and Cr behavior which may be attributed to the geological texture of the study area. In accordance with the results gained by partitioning analysis, IPOLL index values also show contaminated chemical fertilizer as the most risky case for all three metals in comparison with others.
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