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Adsorption of benzene and toluene from waste gas using activated carbon activated by ZnCl2

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Frontiers of Environmental Science & Engineering 2014年第6期8卷 835-844页

作者： leila KARiMNEZHAD Chemical Engineering Faculty Sahand University of Technology P O Box 51335-1996 Sahand New Town Tabriz Iran Reactor and Catalysis Research Center (RCRC) Sahand University of Technology P O Box 51335-1996 Sahand New Town Tabriz Iran Environmental Engineering Research Center (EERC) Sahand University of Technology P O Box 51335-1996 Sahand New Town Tabriz Iran

A series of activated carbons with high surface area were prepared from walnut shell using chemical activation with ZnCl2. in this research the carbonization stage was carried out at 500℃. The performance of the synthesized carbons evaluated in adsorption of benzene and toluene from waste gas. The influence of impregnation ratio on the characteristics of synthesized activated carbons as well as their adsorption capacity was investigated. The ratio of activation agent to walnut shell was selected in the range of 0.5-2.0 wt/wt. The synthesized activated carbons were characterized using XRD, SEM, BET and FTiR techniques. The highest activated carbon production yield was obtained at impregnation ratio of 1.5 wt/wt. The XRD analysis illustrated that peaks intensity decreased with increasing impregnation ratio showing that amorphous property of samples was increased. The SEM analysis revealed successful pore development in synthesized activated carbons obtained at high impregnation ratios. The surface area of the activated carbons increased with increasing impregnation ratio and its maximum value reached 2643 m2.g 1 at impregnation ratio of 2/1. FTiR analysis indicated that the relative amount of different acidic surface groups on synthesized carbons was a function of impregnation ratio. Experimental results for benzene and toluene adsorption showed a high potential of employing synthesized impregnated activated carbon for treatment of waste gas. Generally, the amount of VOC adsorbed on the surface was affected by physicochemical properties of synthesized activated carbons.

关键词： Chemical activation activated carbon textural characterization adsorption benzene toluene

Non-Uniformity of Heavy-ion Beam irradiation on a Direct-Driven Pellet in inertial Confinement Fusion

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Plasma Science and Technology 2011年第1期13卷 44-49页

作者： leila GHOLAMZADEH Abbas GHASEMiZAD Physics Department Faculty of ScienceUniversity of Guilan

Heavy-ion-driven fusion （HiF） is a scheme to achieve inertial confinement fusion （iCF）. investigation of the non-uniformity of heavy-ion beam （HiB） irradiation is one of the key issues for iCF driven by powerful heavy-ion beams. ions in HiB impinge on the pellet surface and deposit their energy in a relatively deep and wide area. Therefore, the non-uniformity of HiB irradiation should be evaluated in the volume of the deposition area in the absorber layer. By using the OK1 code with some corrections, the non-uniformity of heavy-ion beam irradiation for the different ion beams on two kinds of targets were evaluated in 12-beam, 20-beam, 60-beam and 120-beam irradiation schemes. The root-mean-square （RMS） non-uniformity value becomes aRMS = 8.39% in an aluminum mono-layer pellet structure and aRMS = 6.53% in a lead-aluminum layer target for the 12-uranium-beam system. The RMS non-uniformity for the lead-aluminum layer target was lower than that for the mono-layer target. The RMS and peak-to-valley （PTV） non-uniformities are reduced with the increase in beam number, and low at the Bragg peak layer.

关键词： heavy ion beam deposition energy irradiation non-uniformity inertial con- finement fusion Bragg peak layer

Extended adsorption transport models for permeation of copper ions through nanocomposite chitosan/polyvinyl alcohol thin affinity membranes

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Chinese Journal of Chemical Engineering 2016年第11期24卷 1527-1532页

作者： Ehsan Salehi leila Bakhtiari Mahdi Askari Department of Chemical Engineering Faculty of EngineeringArak University Membrane Research Center Department of Chemical EngineeringRazi University

Transport of copper ions through nanocomposite chitosan/polyvinyl alcohol thin adsorptive membranes has been mathematically investigated in the current study. Unsteady-state diffusive transport model was coupled with the Freundlich isotherm to predict the concentration of the ions in dialysis permeation operation. Pristine model was not successful in predicting the experimental data based upon its low coefficients of determination（0.1

关键词： Modeling Chitosan Nanocomposite membrane adsorbents Copper ion Dialysis

Dearomatization of normal paraffin by adsorption process using synthesized NaX zeolite

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Petroleum Science 2013年第3期10卷 408-414页

作者： Hossein Faghihian leila Riazi Department of Chemistry Shahreza Branch Islamic Azad University86145-311 Iran R&D Department I. C. I. I. C.Isfahan Iran

Linear alkyl benzenes （LABs） are the main materials for detergent production. The presence of aromatic compounds in this material can decrease the quality of the final product and enhance the deactivation rate of catalysts. in this research we used zeolite NaX for de-aromatization of the recycled paraffin from the alkylation unit of an LAB production complex. The effect of different parameters on the removal efficiency of adsorbent was studied and optimized. To study the re-usability of the adsorbent, the breakthrough curves were obtained by using a fixed bed column filled with the adsorbent. The results indicated that the adsorbent capacity remained unchanged after three regeneration cycles. The Langmuir and Freundlich adsorption models were applied to describe the equilibrium isotherms. it was concluded that the Langmuir model agreed well with the experimental data. The calculated thermodynamic parameters of the adsorption showed that the adsorption process was spontaneous and exothermic. The reaction rate was estimated by the pseudo-second order kinetic model.

关键词： Dearomatization LAB zeolite adsorption separation

John Coates(1945-2022):生命的礼赞

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数学译林 2024年第1期43卷 22-34,21页

作者： Barry Mazur Stephen Lichtenbaum Andrew Wiles leila Schneps Sujatha Mahesh Kakde 陆柱家(译) 张晓宇(校) 哈佛大学布朗大学牛津大学 Sorbonne大学不列颠哥伦比亚大学印度科学研究所不详

1.怀念John Coates Barry Mazur(马祖尔)JohnCoates(科茨)的数学工作范围很广,包括他的智力乐趣以及他激励和指导几代数学家的才华,是给我们所有人的礼物.在我认识他的初期,就能明显感受到他的活力和友谊,他乐意分享他的想法,欣赏别人... 详细信息

1.怀念John Coates Barry Mazur(马祖尔)JohnCoates(科茨)的数学工作范围很广,包括他的智力乐趣以及他激励和指导几代数学家的才华,是给我们所有人的礼物.在我认识他的初期,就能明显感受到他的活力和友谊,他乐意分享他的想法,欣赏别人的观点.1969年,他来到哈佛大学任Benjamin Peirce(皮尔斯)助理教授.在那里,他在对JohnTate(泰特)的纪念中写道,“非常局促的办公室”,它的“现实中的小规模”和“办公室之间的小咖啡室或走廊”为他提供了一个易于与他人互动的环境.Tate向他介绍了数学的各个方面,这将把他带到后来他做出巨大贡献的地方.

关键词：助理教授皮尔斯哈佛大学

SOLUBLE POLYiMiDES FROM A SEMi-ALiPHATiC DiAMiNE CONTAiNiNG ESTER,AMiDE AND ETHER GROUPS

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Chinese Journal of Polymer Science 2011年第1期29卷 93-100页

作者： Shahram Mehdipour-Ataei leila Akbarian-Feizi iran Polymer and Petrochemical institute P.O.Box 14965/115TehranIran

A diamine was synthesized by two successive reactions. Nucleophilic reaction of 4-hydroxybenzoic acid with terephthaloyl chloride yielded terephthaloyl bis（4-oxybenzoic） acid. Then reaction of this compound with 1,8-diamino-3,6- dioxaoctane via Yamazaki method resulted in preparation of diamine named terephthalic acid bis（4-{2-[2-（2-amino ethoxy）ethoxy]ethyl carbamoyl}phenyl） ester. After fully characterization it was used to prepare new polyimides through polycondensation with different dianhydrides using trimethylchlorosilane. Characterization of polymers was achieved by common methods and their physical properties including inherent viscosity, thermal behavior, thermal stability, crystallinity and solubility were studied. Prepared polyimides showed improved solubility and good thermal stability.

关键词： Polyimide Polycondensation Synthesis Thermal properties

Salinity assessment of groundwater for irrigation to prevent soil salinization

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排灌机械工程学报 2020年第8期38卷 819-828页

作者： leila Esmaeelnejad HAMED Rezaei Soil and Water Research institute Agricultural ResearchEducation and Extension Organization(AREEO)Karaj ***Iran Scientific Board Soil and Water Research InstituteAgricultural ResearchEducation and Extension Organization(AREEO)Karaj ***Iran

Electrical conductivity(EC)is considered as the most important indicator for assessment of groundwater *** of suitable interpolation method for derivation of groundwater quality variables map such as EC is dependent on region conditions and existence of enough *** determining groundwater EC,341 groundwater samples were randomly collected from the central regions of Guilan province,paddy soils,in northern *** methods including inverse distance weighting(iDW),global polynomial interpolation(GPi),local polynomial interpolation(LPi),radial basis function(RBF),ordinary kriging(OK)and empirical Bayesian Kriging(EBK)were used to generate spatial distribution of groundwater *** results indicate that EBK is a superior method with the least RMSE,MAE and the highest R *** generated maps can be used to identify the regions in the studied area where groundwater could be allowed to be extracted and utilized by farmers to reduce adverse effect of the scarcity of surface water.

关键词： empirical Bayesian Kriging geostatistics GiS groundwater electrical conductivity spatial variability

Multicomponent synthesis of dihydropyridines catalyzed by L-proline

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Chinese Chemical Letters 2011年第5期22卷 531-534页

作者： leila Zare Mohammad Nikpassand Department of Organic Chemistry Islamic Azad University-Rasht BranchRashtIran

Multicomponent synthesis of mono and bis 4-substituted-1,4-dihydropyridines from aldehydes,dimedone and ammonium acetate in the presence of an efficient recyclable catalyst,L-proline,in high yield and short reaction t... 详细信息

关键词： Multicomponent Dihydropyridines Dimedone L-Proline

Foraminiferal biostratigraphy of the Miocene Qom Formation, northwest of the Qom, Central iran

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Frontiers of Earth Science 2018年第1期12卷 237-251页

作者： Jahanbakhsh DANESHiAN leila RAMEZANi DANA Geology Department Kharazmi University Tehran 15719-14911 Iran

Near Dochah, in the type area of the Qom Formation, Central iran, the Miocene is partly developed in pelagic facies. From the 894.1 meter thick, ＇a to e＇ members of this section, 152 samples were collected. Abundant planktonic foraminifera let us correlate the study section with the global planktonic foraminifera biozonations. High diversity of foraminifera in the study section allow us to adapt the study succession to global biozonations. Twenty-seven genera and thirty-four species are reported for the first time from the Dochah section. First reports of Praeorbulina sicana and Praeorbulina transitoria in the upper part of this section led to recognition of the Praeorbulina sicana lower occurrence subzone （M5a） biozone with a late Late Burdigalian age.

关键词： biostratigraphy foraminifera Miocene Central iron