جستجوی مقالات مرتبط با کلیدواژه "مدل‎های سینتیک" در نشریات گروه "مواد و متالورژی"

Entering environmental pollutants into water resources have harmful effects on human health and environment. In recent years, adsorption methods using adsorbents to remove contaminants from water resources have been abundant. Pentaaza tetra ethylene supported polyacrylamide (PAA-N5) as a novel adsorbent can be effective for removal of chemical pollutants of the aquatic solution. The purpose of this research is removal of Propargite by PAA-N5 as an adsorbent from polluted water in vitro.

The effects of variables such as pH, contact time, initial concentration, adsorbent amount, efficiency in removing Propargite from contaminated water were studied. Isotherms of Langmuir, Freundlich and Temkin have been fitted with the data of experiment. In addition, kinetics of pseudo- first order, pseudo- second order, intra-particle diffusion and Elovich were also fitted with the experiment data. Graphs and data analyses have been done using office program.

For PAA-N5, Langmuir isotherms show good agreement with the experimental data. Using these models to maximize absorption capacity of 294.11 (mg g-1) for PAA-N5. Absorption rates show quick responses and less than one hours. The results showed that the adsorption kinetics of pseudo- second order is more consistent (R2=0.99).

The results show that PAA-N5 absorbent is effective in removing Propargite contaminants from the aqueous solutions due to high surface area and rapid kinetics of the reactions. Therefore, the use of this adsorbent is recommended to remove Propargite from aqueous solutions.