نتایج جستجو برای: cd ii

تعداد نتایج: 622379  

K. Zare M. Yari O. Moradi,

The interaction between some heavy metal ions such as of Pb(II), Cd(II) and Cu(II) ions from aqueous solution adsorbed by single walled carbon nanotube (SWCNTs) and carboxylate group functionalized single walled carbon nanotube (SWCNT-COOH) surfaces were studied by atomic absorption spectroscopy. The effect of contact time, pH, initial concentration of ion, ionic strength and temperature on the...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه اراک - دانشکده علوم پایه 1390

در این مطالعه حذف همزمان pb(ii و cd(ii از مخلوط دوتایی در محلول های آبی با استفاده از برگ گردو به عنوان جاذب ارزان قیمت و موثر در سیستم گسسته مورد بررسی قرار گرفته است. اثر عوامل موثر شامل: غلظت اولیه هر یک از یون های فلزی، دما، ph، مقدار جاذب و زمان تماس ارزیابی شده است. روش رویه پاسخ (rsm) و طرح مرکب مرکزی (ccd) جهت یافتن شرایط بهینه برای رسیدن به بیشترین ظرفیت جذب (q) و بازده حذف (%r) یونهای...

Journal: :Toxicological sciences : an official journal of the Society of Toxicology 2013
Chung-Hyun Park Byung-Hoon Lee Sang-Gun Ahn Jung-Hoon Yoon Seon-Hee Oh

Glycogen synthase kinase-3β (GSK-3β) plays an important role in the regulation of apoptosis. To investigate its involvement in acquired cadmium (Cd) resistance, Cd-resistant cells (RH460) were established from H460 lung carcinoma cells. Cd resistance led to interruption of apoptosis and autophagy, as determined by an apoptotic sub-G1 population, procaspase-3 clevage, and LC3-II induction. Cd-in...

Journal: :international journal of nano dimension 0
o. moradi department of chemistry, shahre-ghods branch, islamic azad university,tehran, iran. k. zare department of chemistry, science and research branch, islamic azad university,tehran,iran. m. yari faculty of chemistry, islamshahr branch, islamic azad university, islamshahr, iran.

the interaction between some heavy metal ions such as of pb(ii), cd(ii) and cu(ii) ions from aqueous solution adsorbed by single walled carbon nanotube (swcnts) and carboxylate group functionalized single walled carbon nanotube (swcnt-cooh) surfaces were studied by atomic absorption spectroscopy. the effect of contact time, ph, initial concentration of ion, ionic strength and temperature on the...

2005
José L. Westrup Maurícia B. Fritzen Aloísio J. Souza Gizelle C. Bedendo Faruk Nome Haidi D. Fiedler

O estudo da sorção e dessorção de Cd(II) na interface de vários sorventes e soluções aquosas mostrou que a capacidade de troca depende do tipo de sorvente, do pH e do sistema tampão. Tampões como succinato e citrato, os quais são bons complexantes de Cd(II) suprimem completamente a incorporação dentro dos diferentes sorventes. Na presença do tampão Tris, a capacidade de troca observada decresce...

2012
Seyed Naser Azizi Abasalt Hosseinzadeh Colagar Seyede Maryam Hafeziyan

Biosorption of Cd(II) ions from aqueous solutions by native and dried Oscillatoria sp. Cyanobacterium biomass was investigated in the batch mode. The Oscillatoria sp. was prepared from Molecular and Cell Laboratory of University of Mazandaran and grown in BG-11 medium. A comparison of Cd(II) adsorption properties of dried with native Oscillatoria sp. biomass was made, the dried one showed a hig...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان فارس - دانشکده علوم پایه 1390

در این تحقیق از نانو ذرات مغناطیسی اکسید آهن اصلاح شده با آلومینا و نشانش شده با دایتیزون، به منظور پیش تغلیظ و جداسازی مقادیر ناچیز یون های سرب (ii) و کادمیوم (ii) به روش استخراج فاز جامد ناپیوسته و سپس اندازه گیری آن ها با استفاده از اسپکتروفوتومتر جذب اتمی شعله استفاده شده است. در این روش ابتدا نانو ذرات مغناطیسی اکسید آهن ((fe3o4 به روش همرسوبی تهیه شد. در مرحله بعد سطح این نانو ذرات با آلو...

2009
Chun-Hong Ma Yong-Sheng Yan

The asymmetric unit of the title Cd(II) coordination polymer, [Cd(2)(C(8)H(6)O(8))(H(2)O)(3)](n), contains two crystallographically independent Cd(II) cations, one-half each of two independent anionic butane-1,2,3,4-tetra-carboxyl-ate units (L) and three water mol-ecules. Both anionic units lie on inversion centers. One of the Cd(II) ions is six-coordinated by four carboxyl-ate O atoms from fou...

In this study, a ZnO@Ag2O@Fe3O4 nanocomposite as an innovative magnetic solid phase extraction agent was introduced. The structural and morphological properties of the as-prepared nano-sorbent were characterized using X-ray diffraction analysis, Fourier transform infrared spectroscopy, field emission scanning electron microscopy and nitrogen adsorption–desorption techniques. The synthesized mag...

Kavoos Dindarloo Inaloo, Mohammad Behbahani, Mohsen Heidari, Omid Rahmanian, Raziyeh Khorasani,

Introduction: Cadmium is recognized worldwide as a toxic metal. In this study, Solvent-Assisted Dispersive Solid Phase Extraction (SA-DSPE) combined with Flame Atomic Absorption Spectrometry (FAAS), was used for determination of trace amounts of Cadmium (Cd-II)) in drinking water samples. Correspondence: Omid Rahmanian, PhD. ...

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