sunflower seed hull adsorbent for removal of reactive red ۱۹۸: kinetics a nd isot herm study

one of the most im portant factors for the Absorption system design is pr edict the rate of absorptio n that controlled by the kinetic system. Kinetics of absorption depends on the chemical and physical properties of the adsorbent that impact on the absorption mechanis mThe equilibri um adsorp tion isotherm is of importance i n the desig n of adsorp tion syste ms.In general, the adsorption is other h ow adsorb ates interact with adso rbents. Two commonly used isotherms such as L angmuir an d Freundlic h were sel ected for equilibrium absorption of dye Reactive Red ۱۹۸ by particle she ll sun flowe r seeds . The Langmuir adsorption isotherm is based on the a ssumption that adsorption takes place at specific hom ogeneous sites withi n the adsorbent and once a dye molecule occupies a site, no further adsorption takes place at that site. The oretically, the so rbent has a finite capacity to adsorb the sorbate. Predict t he rate of absorption is o ne of the most importan t factors for the system design controlled by the kinetic system. The purpose of this work to find a suitable adsorption isotherm and degree of kinetic for the absorptio n reactive red ۱۹۸ by su n flower seed hull [۱-۳] .

کلیدواژه ها:

adsorpti on isotherml ، Reactive red ۱۹۸ ، kineti c ، Removal.