study of adsorption isotherms and physicochemical

Comparative study of the adsorption of acetaminophen on

Jan 24 2014Equilibrium isotherms The experimental adsorption data of acetaminophen on NE NB and ML activated carbons at 37C are plotted in Figure 3 The isotherms show that NB has the highest adsorption capacity and the highest V mico (cm 3 /g) but there is no linear relationship between micropores and the adsorption capacity because ML presented similar values at a lower Vmicro

Isotherm kinetic and thermodynamic study of

Feb 03 2017In this study equilibrium isotherms kinetics and thermodynamics of ciprofloxacin on seven sediments in a batch sorption process were examined The effects of contact time initial ciprofloxacin concentration temperature and ionic strength on the sorption process were studied The K d parameter from linear sorption model was determined by linear regression analysis while the

Natural Minerals Coated by Biopolymer Chitosan: Synthesis

Nov 08 2016Natural minerals are widely used in treatment technologies as mineral fertilizer food additive in animal husbandry and cosmetics because they combine valuable ion-exchanging and adsorption properties together with unique physicochemical and medical properties Saponite (saponite clay) of the Ukrainian Podillya refers to the class of bentonites a subclass of layered

Adsorption

Adsorption is the adhesion of atoms ions or molecules from a gas liquid or dissolved solid to a surface This process creates a film of the adsorbate on the surface of the adsorbent This process differs from absorption in which a fluid (the absorbate) is dissolved by or permeates a liquid or solid (the absorbent) respectively Adsorption is a surface phenomenon while absorption involves

Study of a Moroccan Clay Siltstone: Physicochemical

Jul 03 2017Before initiating the study of the gross rock physicochemical retention properties we proceeded in the first place to define its chemical compound mineralogical characterization morphological structure and its particle size distribution 3 2 5 Adsorption Isotherms

Adsorption study of low

Sorption and desorption of chlorfenvinphos chlorpyrifos simazine and trifluralin on sunflower seed shells rice husk composted sewage sludge and an agricultural soil was studied Film diffusion and sorption pointed to be related with pesticide physicochemical characteristics Trifluralin and chlorpyrifos were the pesticides which showed the fastest sorption kinetics and the best sorption

Electrochemically enhanced adsorption of nonylphenol on

Removal of nonylphenol (NP) from aqueous solution has attracted widely attention due to its aquatic toxicity and potential to disrupt the endocrine system In an effort to develop the effective and environment-friendly treatment method for NP adsorption of 4-n-nonylphenol (4-NP) on multi-walled carbon nanotubes (MWCNTs) under electrochemical assistance was studied

Adsorption of red azo dyes on multi

Adsorption of red azo dyes on multi-walled carbon nanotubes and activated carbon: A thermodynamic study A Physicochemical and engineering aspects Author: Ferreira Guilherme Max Dias Ferreira Gabriel Max Dias Hespanhol Maria C de Paula Rezende Jaqueline dos Santos Pires Ana Clarissa Gurgel Leandro Vincius Alves da Silva

Experimental and theoretical study of CO2 adsorption by

The objective of this paper was to study CO 2 adsorption on activated clay in the framework of geological storage The activation of clay was characterized via scanning electron microscopy N 2 adsorption–desorption isotherms and X-ray diffraction The adsorption isotherms were generated at different temperatures namely 298 K 323 K and 353 K Based on the experimental result a new

Effect of Pyrolysis Temperature on PhysicoChemical

May 28 2020The present study examined the effect of pyrolysis temperature on the physicochemical properties of biochar activation process and carbon capture Two different categories of biochars were synthesized from herbaceous (miscanthus and switchgrass) and agro-industrial (corn stover and sugarcane bagasse) feedstock under four different pyrolysis temperatures −500 600 700 and 800C

Adsorption of red azo dyes on multi

Adsorption of red azo dyes on multi-walled carbon nanotubes and activated carbon: A thermodynamic study A Physicochemical and engineering aspects Author: Ferreira Guilherme Max Dias Ferreira Gabriel Max Dias Hespanhol Maria C de Paula Rezende Jaqueline dos Santos Pires Ana Clarissa Gurgel Leandro Vincius Alves da Silva

Kinetic Study of Adsorption Rhodamine 6G Dye from

Apr 01 2014adsorption dose was taken as 0 2gm forfurthar experiments 3 4 Adsorption Isotherms The adsorption mechanism and relationship between the concentration of the adsorbate and adsorption capacity of both the adsorbent was studied using different adsorption isotherm

Adsorption

Adsorption is the adhesion of atoms ions or molecules from a gas liquid or dissolved solid to a surface This process creates a film of the adsorbate on the surface of the adsorbent This process differs from absorption in which a fluid (the absorbate) is dissolved by or permeates a liquid or solid (the absorbent) respectively Adsorption is a surface phenomenon while absorption involves

Adsorption characteristics of norfloxacin by biochar

The isotherms of BC450 and BC550 were relatively linear suggesting partitioning was the dominant mechanism whereas the main adsorption mechanism of NOR on BC350 BC650 and BC750 was pore-filling which can be described by nonlinear isotherms Thermodynamic study showed that the adsorption of NOR onto biochars was spontaneous and NOR sorption

Contents Colloids and Surfaces A: Physicochemical and

from adsorption isotherms They suggested a method for treating nitrogen adsorption measurements on porous carbons based on the local mean field approximation [5–7] A further significant improvement was made by Lastoskie et al [10] who used a NLDFT model within Tarazona smooth density approxi-mation [13] for modeling nitrogen adsorption

Adsorption of Cobalt onto Coal based Granular Activated

consisted of characterization of physicochemical properties of activated carbon used in this work The second part was an experimental study of adsorption of metal ion by activated carbon The study of adsorption kinetics is significant as it provides valuable insights into the reaction pathways and the mechanism of the reactions

Natural Minerals Coated by Biopolymer Chitosan: Synthesis

Nov 08 2016Natural minerals are widely used in treatment technologies as mineral fertilizer food additive in animal husbandry and cosmetics because they combine valuable ion-exchanging and adsorption properties together with unique physicochemical and medical properties Saponite (saponite clay) of the Ukrainian Podillya refers to the class of bentonites a subclass of layered

ADSORPTION BEHAVIOR OF Zn(II) ONTO NATURAL

The adsorption kinetics were performed by collecting samples at definite intervals time in the range of 5–90 min The adsorption isotherms were obtained by varying the initial concentrations of Zn(II) from 100 to 600 mgdm-3 at 25 C 35 C and 45 C The thermodynamics were calculated from the temperature dependent adsorption isotherms

Statistical Foundation of Empirical Isotherms

We show that most of the empirical or semi-empirical isotherms proposed to extend the Langmuir formula to sorption (adsorption chimisorption and biosorption) on heterogeneous surfaces in the gaseous and liquid phase belong to the family and subfamily of the BurrXII cumulative distribution functions As a consequence they obey relatively simple differential equations which describe birth and

Net Adsorption: A Thermodynamic Framework for

The thermodynamic treatment of adsorption phenomena is based on the Gibbs dividing surface which is conceptually clear for a flat surface On a flat surface the primary extensive property is the area of the solid As applications became more significant necessitating microporous solids early researchers such as McBain and Coolidge implemented the Gibbs definition by invoking a reference

Adsorption Study for the Removal of Nitrate from Water

2 6 Adsorption Isotherms The adsorption isotherms are used to study the adsorption mechanisms An adsorption isotherm describes the equilibrium at a given temperature between the adsorbed solute concentration and the unadsorbed concentration However the literature shows that authors pay less attention to the type of isotherm obtained they

Study of a Moroccan Clay Siltstone: Physicochemical

Jul 03 2017Before initiating the study of the gross rock physicochemical retention properties we proceeded in the first place to define its chemical compound mineralogical characterization morphological structure and its particle size distribution 3 2 5 Adsorption Isotherms

Physicochemical Properties of Activated Carbon: Their

1173 K and 1273 K)—was carried out The effect of the physicochemical changes of the adsorbent in the adsorption capacity of the compounds was determined from the equilibrium data (adsorption isotherms) and the adsorbate–adsorbent affinity was evaluated by immersion enthalpy in the studied compound solutions 2 Materials and Methods 2 1