Maximum monolayer adsorption capacity

Adsorption processes of Cd(II) and Pb(II) from aqueous solutions onto pumice stone powder (PSP) were investigated in batch mode. The influences of solution pH, contact time, adsorbent dosage, initial metal (M) concentration, and temperature on adsorption process were investigated. The kinetic and isotherm data were analysed using different model equations. The adsorption process was consistent with the Langmuir model for both metal ions with high R2 and low χ2 values for both Pb(II) and Cd(II). The maximum monolayer adsorption capacities were 28.09 and 27.

12p tudichquannguyet 29-11-2021 14 0   Download

In this work, Ag+ ions in water were adsorbed using hydroxyapatite (HAp) powder and recovery silver by electrodeposition. The adsorption efficiency of silver was about 61 % at 50 oC after 60 minutes of contact time. The Ag+ adsorption process using HAp powder followed Langmuir adsorption isotherms with the maximum monolayer adsorption capacity of 18.7 mg/g. 60 % of silver can recovery by electrodeposition after 4 hours at the apply current of 10 mA at 50 °C.

8p cothumenhmong11 06-05-2021 13 1   Download

The experimental adsorption data showed that the Cd2+ removal process follows the pseudo-secondorder law. The results about the effect of initial Cd2+ concentration were evaluated using Langmuir and Freundlich adsorption isotherms. Maximum monolayer adsorption capacity was 103 mg/g.

7p bautroibinhyen211 26-11-2018 17 0   Download