نتایج جستجو برای: sorption thermodynamic

تعداد نتایج: 51801  

2013
Romain Vermorel Gilles Pijaudier - Cabot Bruno Mendiboure

1.1 Abstract Poromechanics offers a consistent theoretical framework for describing the mechanical response of porous solids. When dealing with fully saturated nanoporous materials, which exhibit pores of the nanometer size, additional effects due to adsorption and confinement of the fluid molecules in the smallest pores must be accounted for. From the mechanical point of view, these phenomena ...

We developed a facile strategy for preparation of heteropoly metalate/graphene oxide nanocomposite as a new ion exchanger for cadmium ion removal from aqueous solution. The synthesized nanocomposite was characterized by X-ray powder diffraction (XRD), UV-Vis spectroscopy, FT-IR spectroscopy and Raman spectroscopy. Our findings indicated that the combination of heteropoly metalate nanoparticles ...

Journal: :international journal of environmental research 2011
a.v. dekhil y. hannachi a. ghorbel t. boubaker

in this study caulerpa racemosa has been characterized and used for the removal of cd(ii) and pb (ii) from aqueous solutions. the effect of ph, adsorbent dosage, contact time and temperature on adsorption process was studied in batch experiments. langmuir and freundlich models were applied to describe the biosorption isotherm of the metal ions by c. racemosa biomass. the adsorption data can be ...

Journal: :Journal of the American Chemical Society 2015
Pravas Deria Diego A Gómez-Gualdrón Wojciech Bury Herbert T Schaef Timothy C Wang Praveen K Thallapally Amy A Sarjeant Randall Q Snurr Joseph T Hupp Omar K Farha

"Breathing" metal-organic frameworks (MOFs) are an emerging class of soft porous crystals (SPCs) with potential for high working capacity for gas storage applications. However, most breathing MOFs have low stability and/or low surface area. Here we report a water-stable, high surface area, breathing MOF of ftw topology, NU-1105. While Zr6-oxo clusters as nodes introduce water stability in NU-11...

Journal: :Environmental toxicology and chemistry 2005
Aaryn D Jones Gregory L Bruland Sheela G Agrawal Dharni Vasudevan

Veterinary antibiotics such as oxytetracycline (OTC) increasingly are found in the environment and often come into direct contact with soils via the release of animal wastes. Oxytetracycline is known to sorb strongly to soils by interaction with soil organic matter, clay minerals, and metal oxides. However, current knowledge of the influence of soil properties on OTC sorption is limited, as is ...

Journal: :Inorganic chemistry 2009
Jeong Yong Lee John M Roberts Omar K Farha Amy A Sarjeant Karl A Scheidt Joseph T Hupp

A new strut containing an imidazolium tetracarboxylic acid core has been successfully incorporated into a microporous material using paddlewheel-coordinated copper(II) ions as nodes. Sorption studies conducted on this permanently microporous material imply that it can separate carbon dioxide from methane with high selectivity.

Journal: :journal of physical & theoretical chemistry 2013
s. ghasemlou h. aghaie m. monajjemi

hydroxyapatite nanocrystals were synthesized by sol-gel combustion method for the sorption ofhg(ii) ions from aqueous solutions. the effects of varying parameters such as ph, temperature, initialmetal concentration, and contact time on the adsorption process were examined. adsorptionequilibrium was established in 360 minutes and the maximum adsorption of hg(ii) on thehydroxyapatite was observed...

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