In the present work the adsorption of selenium six valence electrons from Na
2SeO
4 solution was investigated. The lead compound 1,000 mg·dm
-3 showed the ability to adsorb Se
6+ ion from the Se
6+ ion solution.
Under the experimental conditions of Se
6+ ion concentration = 30 mg·dm
-3 and pH = 3~9, the Se
6+ ion adsorbed amount was about 0.025 kg·kg
-1.
When the experimental conditions were: pH = 7 and 100 mg·dm
-3 Se
6+ ion concentration in the solution, maximum adsorbed Se
6+ ion amount was 0.041 kg·kg
-1. Using x-ray photoelectron spectroscopy, the changes of the adsorbed Se
6+ ion to Se
4+ and Se
0 were observed as Molybdomerite was formed.
On the other hand, the absorption of Pb cations from the lead solution was investigated. When 2000 mg·dm
-3 fly ash was mixed with 40 mg·dm
-3 lead solution, the concentration of the lead solution was under 0.1 mg·dm
-3 after 1 hour.
The adsorption of Se-cations from the selenium wastewater was observed. When 0.02 kg·dm
-3 lead compound was mixed with 70 mg·dm
-3 selenium wastewater, the concentration of the selenium wastewater was under 0.1 mg·dm
-3 after 30 minutes.
The removal of selenium ion from actual wastewater is possible.
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