Notice of Retraction: Study on Arsenic (III) Adsorption and Desorption by Simulant Acid Rain on Different Oxide

Abstract

The adsorption capacity of arsenic (Ⅲ) on manganese oxide, iron oxide, aluminum oxide increased gradually with the increase of arsenic (Ⅲ) concentration, the experimental saturated adsorption capacity on manganese oxide, iron oxide, aluminum oxide under 25 ℃ were found to be 48.38, 23.70, 3.52 mg/g, respectively. Adsorption isotherm of three oxides could better meet the Langmuir model and the Freudlich model, the best one was the Langmuir model. The desorption balance time of simulant acid rain on manganese oxide, iron oxide, aluminum oxide were 90, 60, 15 min, respectively. The pH value of simulant acid rain increased, the desorption capacity of As (Ⅲ) on iron oxide, aluminum oxide decreased gradually and then became balance, while the maximum desorption capacity on manganese oxide reached at the pH value of 4. Ionic strength had neglectable effect on desorption. To manganese oxide, iron oxide, the effect were not obvious when desorption times increased. It was an important reason for arsenic ( Ⅲ ) retention in soils that manganese oxide, iron oxide had large adsorption capacity for arsenic (Ⅲ), which could not be easily eluted by simulant acid rain.