نتایج جستجو برای: adsorption process

تعداد نتایج: 1358174  

2012
Qingfeng Wu Hanlie Hong Xiaoling Zhang

As one of the most important soil components, kaolinite plays an important role in transport and fixation of organic pollutants in soils. P-Aminoazobenzene (PAAB) is a sort of the carcinogenic aromatic amine which is commonly used as the intermediates of azo dyes. It can cause mutations and cancer of aquatic biota as well as humans. In this study, adsorption of PAAB on kaolinite in aqueous solu...

2017
Ivica Ružić

In this paper the time dependence of adsorption at solid-Iiquid interface is discussed for both the mass-transport and intrinsic kinetic control of the adsorption process. It has been shown that the time dependence of adsorption of the mass-transport control' of the adsorption process is mostly dependent on the strength of adsorption (natur al diffusion) and sametimes on the mass-transport coef...

Journal: :iranian journal of chemistry and chemical engineering 0
abdallah bouguettoucha chemical engineering laboratory, university ferhat abbas, sétif, algeria abdelbaki reffas laboratoire de matériaux inorganiques, faculté de sciences, université mohamed boudiaf - m’sila, algérie derradji chebli laboratoire de génie des procédés chimiques, faculté de technologie, université ferhat abbas, sétif-1, 19000 sétif, algérie abdeltif amrane ecole nationale supérieure de chimie de rennes, université de rennes 1, cnrs, umr 6226, avenue du général leclerc, cs 50837, 35708, rennes cedex 7, rennes, france

the effect of acid-alkaline treatment of lignocellulosic material (wild carob forest wastes) on ethyl violet adsorption was investigated. it was found that surface chemistry plays an important role in ethyl violet (ev) adsorption. hcl treatment produces more active acidic surface groups such as carboxylic and lactone, resulting in an increase in the adsorption of ev dye. the adsorption efficien...

Adsorption is a chemical method for water purification. In the present study, native and impregnated active carbon was used for adsorption to evaluate the efficacy of the process in manganese removal from aqueous solutions. Impregnation reaction was performed using the precipitate colloids of manganese oxides onto the carbon surface. X-ray diffraction, Fourier-transform infrared spectroscopy, a...

Lattice gas automata (LGA) model is developed to simulate polymer adsorption process by adding some collision rules. The simulation result of the model is matched with batch experiment and compared with accepted isothermal adsorption equations. They show that the model is viable to perform simulation of the polymer adsorption process. The LGA model is then applied for simulating continuous poly...

Journal: :iranian journal of oil & gas science and technology 2014
mohammad amin safarzadeh seyyed alireza tabatabaei nezhad eghbal sahraei mehdi mohammad salehi

the main factor affecting the economics of foam-assisted water alternative gas (fawag) process isthe loss of foaming agent by adsorption onto reservoir rocks. in this study, the effects of phases,surfactant concentration, salinity, adsorbents, and sacrificial agent on adsorption density wereinvestigated by special adsorption experiments. moreover, a series of fawag tests were performedto examin...

Journal: :Journal of hazardous materials 2010
Moonis Ali Khan Seong-wook Kim Rifaqat Ali Khan Rao R A I Abou-Shanab Amit Bhatnagar Hocheol Song Byong-Hun Jeon

The objective of this work was to compare the effectiveness of four commercially available granular activated carbons (GACs); coconut (CGAC), wood (WGAC), lignite (LGAC) and bituminous (BGAC) for the removal of dichloromethane (DCM) from aqueous solution by batch process. Various parameters such as thermodynamics, kinetics, pH, concentration of adsorbate, dosages of adsorbent and competitive io...

2006
Radek Erban Jonathan Chapman Kerry D. Fisher Ioannis G. Kevrekidis Leonard W. Seymour

Many drug delivery systems suffer from undesirable interactions with the host immune system. It has been experimentally established that covalent attachment (irreversible adsorption) of suitable macromolecules to the surface of the drug carrier can reduce such undesirable interactions. A fundamental understanding of the adsorption process is still lacking. In this paper, the classical random ir...

Journal: :physical chemistry and electrochemistry 0
mohammad ali zare young researchers and elite club, marvdasht branch, islamic azad university, marvdasht, iran masoomeh emadi young researchers and elite club, marvdasht branch, islamic azad university, marvdasht, iran razieh karimi haghighi young researchers and elite club, marvdasht branch, islamic azad university, marvdasht, iran mohammad sadegh moaddeli young researchers and elite club, marvdasht branch, islamic azad university, marvdasht, iran masoud edalati young researchers and elite club, marvdasht branch, islamic azad university, marvdasht, iran

an agricultural waste i.e. rice husk has been used as a cheap adsorbent for the removal ofleadas a harmful heavy metal from contaminated water via adsorption. the adsorption capacity of rice husk was calculated by equilibrium models. the results showed that the adsorption process has the best accordance with langmuir model. the kinetics of the adsorption was also investigated and obtained that ...

Journal: :Acta chimica Slovenica 2013
Babak Samiey Saeid Farhadi

NiO nanoparticle was used to adsorb fuchsin acid (FA) from aqueous solution. In the used concentration range of FA, its adsorption isotherms on NiO nanoparticles were three-region. NiO nanoparticle was prepared via the thermal decomposition of the tris(ethylenediamine)Ni(II) nitrate complex as a new precursor. In this work, effects of temperature, concentration, particle size, shaking rate, con...

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