Adsorption and Coprecipitation of AsV from Aqueous Solutions by Manganese DioxideReport as inadecuate




Adsorption and Coprecipitation of AsV from Aqueous Solutions by Manganese Dioxide - Download this document for free, or read online. Document in PDF available to download.

The effects of solution pH and initial concentration on adsorption and coprecipitation of AsV from aqueous solutions by manganese dioxide MnO2 for 50d and 1120d were studied. The XRD, FT-IR and SEM results indicated that there was only slight difference between the MnO2 adsorbents before and after adsorption, but their crystal structure had not changed. For the initial AsV concentration Co=0.1 or 1.0 mmol-L, the adsorption efficiency of AsV onto MnO2 decreased with the increasing pH when pH from 2.0 to 12.0. For the initial AsV concentration Co=0.01 mmol-L, the adsorption efficiency exceeded 95% at pH 2-8 after 50d or 1120d reaction, but the AsV concentration in the solution after adsorption for 1120d was higher than that for 50d.

KEYWORDS

Arsenic; manganese dioxide; Adsorption; Coprecipitation

Cite this paper







Author: Meina Liang, Yinian Zhu, Fenfen Cai

Source: http://www.scirp.org/



DOWNLOAD PDF




Related documents