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Oil spill sorption using raw and acetylated sugarcane bagasse

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Journal of Central South University 2016年第7期23卷 1618-1625页

作者： Reza Behnood Bagher Anvaripour nematollah Jaafarzadeh Masoome Farasati HSE Department of Abadan Faculty of Technology PetroLeum University of Technology Abadan Iran Environmental Technologies Research Center Ahvaz Jundishapur University of Medical Sciences Ahvaz Iran School of Health Ahvaz Jundishapur University of Medical Sciences Ahvaz Iran Department of Irrigation and Water Resources Engineering Faculty of Agriculture Razi University Iran Faculty of Agriculture Gonbad-e Kavoos University Gonbad Iran

In the recent decades oil spills in the aquatic environments are one of the major sources of environmental pollutions, which are steadily growing with the increase in oil consumption. Adsorption is a rapid and cost effective process to minimize the environmental impacts of oil spills and cleanup these pollutants. In this work, the crude oil sorption capacity was examined with raw sugarcane bagasse and acetylated sugarcane bagasse. Results show that the acetylated bagasse was significantly more oleophilic than the raw bagasse and acetylation reaction can increase bagasse oil sorption ability by about 90%. The maximum sorption capacities of acetylated bagasse were obtained about 11.3 g and 9.1 g in dry system(crude oil sorption) and oil layer sorption, respectively. The physicochemical characteristics of the sorbents such as composition, water solubility, moisture content and density were measured according to ASTM standard methods. Also Fourier transform infrared spectroscopy(FTIR) of raw and acetylated bagasse was performed to investigate the effect of acetylation on sugarcane bagasse structure.

关键词： crude oil adsorption natural sorbent: sugarcane bagasse acetylated bagasse

Evaluating the Importance of Environmental Variables on Spatial Distribution of Caspian cobra Naja oxiana(Eichwald, 1831) in Iran

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Asian Herpetological Research 2019年第2期10卷 129-138页

作者： Elmira KAZEMI Mohammad KABOLI Rasoul KHOSRAVI nematollah KHORASANI Department of Environment Faculty of Natural Recources and EnvironmentScience and Research BranchIslamic Azad UniversityTehranIran Department of Environmental Science Faculty of Natural ResourcesUniversity of TehranKarajIran Department of Natural Resources and Environmental Engineering School of AgricultureShiraz UniversityShirazIran

Over recent years, the population of Caspian cobra Naja oxiana has declined in its distribution range in Iran due to habitat destruction and overhunting. Consequently, their small and isolated populations in fragmented landscapes are facing genetic and demographic threats. Evaluating the spatial distribution pattern of Naja oxiana, identifying core habitat patches and improving landscape connectivity among the patches have a significant role in the long-term survival of the species. This study predicts the spatial distribution map of the Caspian cobra considering the factors affecting the predictive power of the distribution models, including sampling bias in presence points, correct selection of background locations, and input model parameters. The sampling bias in presence points was removed using spatial filtering. Several models were run using 19 environmental variables that eventually led to the selection of the effective habitat variables and best MaxEnt distribution model. We also used an ensemble model(EM) of habitat suitability methods to predict the potential habitats of the species. Topographical roughness, shrublands, average annual precipitation, and sparse rangeland with a density of ≤ 20% had the most effect on the spatial distribution of Caspian cobra. The evaluation of models confirmed that the EM has more predictive performance than MaxEnt in predicting the distribution of Naja oxiana.

关键词： Naja oxiana MaxEnt habitat suitability landscape connectivity distribution modelling

Environmental impact prediction using remote sensing images

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第3期9卷 381-390页

作者： Pezhman ROUDGARMI Masoud MONAVARI Jahangir FEGHHI Jafar NOURI nematollah KHORASANI Tehran Agricultural and Natural Resources Research Center Agricultural Research and Education Organization (AREO) Tehran Iran Department of Environmental Management Graduate School of the Environment and Energy Science and Research Campus IAU Tehran Iran Department of Environmental Science Graduate School of the Environment and Energy Science and Research Campus IAU Tehran Iran Department of Forestry and Forest Economics Faculty of Natural Resources University of Tehran Karaj Iran Department of Environmental Health Engineering School of Public Health and Center for Environmental Research Medical Science University of Tehran Tehran Iran Department of Environmental Science Faculty of Natural ResourcesUniversity of TehranKarajIran

Environmental impact prediction is an important step in many environmental studies. A wide variety of methods have been developed in this concern. During this study, remote sensing images were used for environmental impact prediction in Ro-batkarim area, Iran, during the years of 2005～2007. It was assumed that environmental impact could be predicted using time series satellite imageries. Natural vegetation cover was chosen as a main environmental element and a case study. Environmental impacts of the regional development on natural vegetation of the area were investigated considering the changes occurred on the extent of natural vegetation cover and the amount of biomass. Vegetation data, land use and land cover classes (as activity factors) within several years were prepared using satellite images. The amount of biomass was measured by Soil-adjusted Vegetation Index (SAVI) and Normalized Difference Vegetation Index (NDVI) based on satellite images. The resulted biomass estimates were tested by the paired samples t-test method. No significant difference was observed between the average biomass of estimated and control samples at the 5% significance level. Finally, regression models were used for the environmental impacts prediction. All obtained regression models for prediction of impacts on natural vegetation cover show values over 0.9 for both correlation coefficient and R-squared. According to the resulted methodology, the prediction models of projects and plans impacts can also be developed for other environmental elements which may be derived using time series remote sensing images.

关键词： Environmental impact Remote sensing Prediction Vegetation Biomass

Zircon U-Pb Ages and Magmatic History of the Kashan Plutons in the Central Urumieh-Dokhtar Magmatic Arc,Iran:Evidence for Neotethyan Subduction during Paleogene-Neogene

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Journal of Earth Science 2020年第1期31卷 53-68页

作者： Tayebeh Khaksarc nematollah Rashidnejad-Omran Fukun Chen Shu-Guang Song Shuang-Qing Li Majid Ghaderi Department of Geology Tarbiat Modares UniversityTehran 14115-175Iran School of Earth and Space Sciences University of Science and Technology of ChinaHefei 230026China School of Earth and Space Sciences Peking UniversityBeijing 100871China

The Kashan plutons are situated in the central part of Urumieh-Dokhtar magmatic arc recording subduction-related magmatism within the Alpine-Himalayan orogeny in *** rocks consist of different calc-alkaline plutonic rocks including gabbro,gabbroic diorite,microdiorite,monzodiorite,tonalite,granodiorite,and *** plutons were emplaced into the Jurassic sedimentary units(Shemshak Formation)and the Eocene calc-alkaline volcanic and pyroclastic *** U-Pb zircon ages show that the Kashan plutons formed during two main periods at 35.20±0.71 Ma in the Late Eocene(Priabonian)and at 18.90±0.84,19.26±0.83,19.30±1.2,and 17.3±1.8 Ma in the Early Miocene(Burdigalian).The reported events in the Kashan plutons imply the final phases of subductionrelated magmatism before the collision which happened between the Arabian and Iranian plates in the Middle *** plutonic activity in the Kashan region occurred during the transition from Eocene subduction-related setting to Middle Miocene collisional setting.

关键词： zircon U-Pb dating plutonic episodes Kashan Urumieh-Dokhtar magmatic arc Iran

Oligocene subduction-related plutonism in the Nodoushan area,Urumieh-Dokhtar magmatic belt: Petrogenetic constraints from U-Pb zircon geochronology and isotope geochemistry

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Geoscience Frontiers 2019年第2期10卷 725-751页

作者： Badieh Shahsavari Alavijeh nematollah Rashidnejad-Omran Fatma Toksoy-K?ksal Wenliang Xu Jalil Ghalamghash Department of Geology Faculty of Basic SciencesTarbiat Modares University Department of Geological Engineering Middle East Technical University College of Earth Sciences Jilin University State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Research Institute for Earth Sciences Geological Survey of Iran

Geochemical data and Sr-Nd isotopes of the host rocks and magmatic microgranular enclaves(MMEs)collected from the Oligocene Nodoushan Plutonic Complex(NPC) in the central part of the Urumieh-Dokhtar Magmatic Belt(UDMB) were studied in order to better understand the magmatic and geodynamic evolution of the UDMB. New U-Pb zircon ages reveal that the NPC was assembled incrementally over ca. 5 m.y., during two main episodes at 30.52 ± 0.11 Ma and 30.06 ± 0.10 Ma in the early Oligocene(middle Rupelian) for dioritic and granite intrusives, and at 24.994 ± 0.037 Ma and 24.13 ± 0.19 Ma in the late Oligocene(latest Chattian) for granodioritic and diorite porphyry units,respectively. The spherical to ellipsoidal enclaves are composed of diorite to monzodiorite and minor gabbroic diorite(SiO_2 = 47.73-57.36 wt.%; Mg# = 42.15-53.04); the host intrusions are mainly granite,granodiorite and diorite porphyry(SiO_2 = 56.51-72.35 wt.%; Mg# = 26.29-50.86). All the samples used in this study have similar geochemical features, including enrichment in large ion lithophile elements(LILEs, e.g. Rb, Ba, Sr) and light rare earth elements(LREEs) relative to high field strength elements(HFSEs) and heavy rare earth elements(HREEs). These features, combined with a relative depletion in Nb,Ta, Ti and P, are characteristic of subduction-related magmas. Isotopic data for the host rocks display ISr = 0.705045-0.707959, εNd(t) =-3.23 to +3.80, and the Nd model ages(TDM) vary from 0.58 Ga to 1.37 Ga. Compared with the host rocks, the MMEs are relatively homogeneous in isotopic composition,with Isr ranging from 0.705513 to 0.707275 and εNd(t) from -1.46 to 4.62. The MMEs have TDM ranging from 0.49 Ga to 1.39 Ga. Geochemical and isotopic similarities between the MMEs and their host rocks demonstrate that the enclaves have mixed origins and were most probably formed by interactions between the lower crust-and mantle-derived magmas. Geochemical data, in combination with geodynamic evidence, suggest that

关键词： Urumiehe-Dokhtar magmatic belt Granitoid rocks Subduction Zircon U-Pb ages Radiogenic isotopes Central Iran

Geochemistry of Enclaves and Host Granitoids from the Kashan Granitoid Complex, Central Iran: Implications for Enclave Generation by Interaction of Cogenetic Magmas

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Journal of Earth Science 2015年第5期26卷 626-647页

作者： Maryam Honarmand nematollah Rashidnejad Omran Franz Neubauer Ghasem Nabatian Mohammad Hashem Emami Albrecht von Quadt Yunpeng Dong Manfred Bernroider Department of Earth Sciences Institute for Advanced Studies in Basic Sciences (IASBS) Department of Geology Faculty of Basic Sciences Tarbiat Modares University Department Geography and Geology University of Salzburg Department of Geology Faculty of Sciences University of Zanjan Research Institute for Earth Sciences Geological Survey of Iran Institute of Isotope Geology and Mineral Resources ETH Zürich State Laboratory of Continental Dynamics Department of Geology Northwest University

The major and trace elements and Sr-Nd-Pb isotopes of Miocene host granitoid rocks and their mafic microgranular enclaves（MMEs） were studied to understand the petrogenesis of MMEs in the Kashan complex, which is part of the Urumieh-Dokhtar magmatic belt（Iran）. The host rocks consist of quartz-diorite and tonalite associated with a dioritic intrusion. The enclaves show microgranular texture and the same mineralogy as their respective host with plagioclase, quartz and biotite. MMEs have a diorite to quartz-diorite composition and show geochemical characteristics mostly between their granitoid host and the diorite intrusion. Chondrite-normalized REE patterns of all samples are moderately fractionated [（La/Yb）N=2.1 to 12.9]. The MMEs display in part small negative Eu anomalies（Eu/Eu＊=0.54 to 0.99）, with enrichment of LILE and depletion of HFSE. The enclaves show emplacement depth of -4 to 6 km which is comparable with the host rocks. Moreover, the Hornblende-plagioclase equilibrium temprature of MMEs yields average temperatures of 795℃ which is slightly higher than the host ones. Identical mineral compositions and Nd-Sr-Pb isotopic features of MME-host granitoid pairs indicate interactions and parallel evolution of MME and enclosing granitoid in the Kashan plutons. Additionally, the geochemical and isotopic investigations of host and dioritic intrusions suggest a common source for their genesis. A thermal anomaly induced by underplated basic magma into a hot crust would have caused partial melting in the lower crust to generate Kashan granitoid rocks.

关键词： magma interaction mafic microgranular enclave radiogenic isotopes granitoid rocks Kashan Urumieh-Dokhtar magmatic belt

Period Correction and Evolutionary Status of the MACHO Eclipsing Binary System 47.2135.29

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International Journal of Astronomy and Astrophysics 2014年第3期4卷 445-452页

作者： nematollah Riazi Maysam Rezvani Physics Department Shahid Beheshti University Evin Tehran Iran Physics Department Shiraz University International Division Shiraz Iran

The eclipsing binary system which is catalogued in MACHO as 47.2135.29 is analyzed in detail for orbital elements and absolute parameters based on the MACHO observations and the latest values for the distance modulus of LMC. The period of the system is found more accurately, by minimizing the dispersion in the folded light curves. The binary is found to be a young semi-detached binary and is potentially a beta Lyrae system.

关键词： MACHO Eclipsing Binaries Light Curve Analysis

An overview of travel-associated central nervous system infectious diseases:risk assessment,general considerations and future directions

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Asian Pacific Journal of Tropical Biomedicine 2014年第8期4卷 589-596页

作者： Morteza Izadi Annan Is'haqi Mohammad Ali Is'haqi nematollah Jonaidi Jafari Fatemeh Rahamaty Abdolali Banki Baqiyatallah Hospital Baqiyatallah University of Medical SciencesTehranIran Department of Neurology Tehran University of Medical SciencesTehran.Iran Department of Infectious Diseases Rasoul Akram HospitalIran University of Medical SciencesTehran Iran Department of Neurology Baqiyatallah University of Medical SciencesTehranIran

Nervous system infections are among the most important diseases in *** travellers might be exposed to infectious agents of central nervous system,which may require in-patient *** course is not uncommon in this family of disorders and requires swift *** overview of the available evidence in the field ***,Urgent to pave the way to increase the awareness of travel-medicine practitioners and highlights dark areas for future *** November 2013,data were collected from PubMed,Scopus,and Web of knowledge(1980 to2013) including books,reviews,and peer-reviewed literature,Works pertained to pre-travel care,interventions,vaccinations related neurological infections were *** we provide information on pre-travel care,vaccination,chronic nervous system disorders,and post-travel *** with regard to knowledge gaps,and state-of-the-art research are *** an increasing number of international travellers,novel dynamic ways are available for physicians to monitor spread of central nervous system *** research has made great progresses in developing newer medications,detecting the spread of infections and the public *** an ongoing scientific discussion in the field of travel medicine,further research is required for vaccine development,state-of-the-art laboratory tests,and genetic engineering of vectors.

关键词： Travel medicine Infectious diseases Nervous system disorders

Optimization of Recloser Placement to Improve Reliability by Genetic Algorithm

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Energy and Power Engineering 2011年第4期3卷 508-512页

作者： nematollah Dehghani Rahman Dashti 不详

In this paper, a simple method for placing an optimal number of recloser is presented. The algorithm is solved using genetic algorithm as the optimization method. The majority of outage events experienced by customers are due to electrical distribution failures. Increasing network reliability is a necessity in order to reduce interruption events. Distribution network automation can trim down outage events and increase system reliability. Network automation has to be done using optimization approaches. Genetic Algorithm (GA) is a relatively new technique used in power systems optimization problems. Distribution network automation is one of the aspects tackled using GA. However ,the methodologies used to improve the reliability of radial distribution feeders are reviewed. The reliability improvement are demonstrated for typical distribution feeder layouts. determined. The method enjoys the simplicity of conFigure uration, accuracy of the results and reduction of the time consuming. The obtained results also show the applicability of the

关键词： Recloser Reliability Transient Error GA