Abstract
The adsorption capability of Cd2+ with δ-MnO2 was studied in water. The results indicated: the adsorption strongly relied on pH values. At 303K, the pH values were above 6.05, adsorption percentages of Cd2+ were nearly 100%. When pH values were below 2.3, adsorption rates of Cd2+ was below 20%. The adsorption processes was completely controlled by reaction rate and diffusion factor. The reaction rate of adsorption increased with pH values and temperatures. The adsorption activated energy of Cd2+ was 54.66 KJ•mol -1 at pH value 3.28, and it was 31.98 KJ•mol -1 at pH value 6.05. δ-MnO2 may be effectively desorpted after adsorption Cd2+ at the pH values below 2.05. The desorption rates were about 75%.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call