Dissolved Selenium(VI) Removal by Zero-Valent Iron under Oxic Conditions: Influence of Sulfate and Nitrate.

ABSTRACT: Dissolved Se(VI) removal by three commercially available zero-valent irons (ZVIs) was examined in oxic batch experiments under circumneutral pH conditions in the presence and absence of NO₃ ^- and SO₄ ^2-. Environmentally relevant Se(VI) (1 mg L^-1), NO₃ ^- ([NO₃-N] = 15 mg L^-1), and SO₄ ^2- (1800 mg L^-1) were employed to simulate mining-impacted waters. Ninety percent of Se(VI) removal was achieved within 4-8 h in the absence of SO₄ ^2- and NO₃ ^-. A similar Se(VI) removal rate was observed after 10-32 h in the presence of NO₃ ^-. Dissolved Se(VI) removal rates exhibited the highest decrease in the pre

SUBMITTER: Das S 

PROVIDER: S-EPMC6640955 | biostudies-literature | 2017 Apr

REPOSITORIES: biostudies-literature