Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Removal of arsenic from water using manganese (III) oxide: Adsorption of As(III) and As(V)
Removal of arsenic from water was evaluated with manganese (III) oxide (Mn 2 O 3 ) as adsorbent. Adsorption of As(III) and As(V) onto Mn 2 O 3 was favorable according to the Langmuir and Freundlich adsorption equilibrium equations, while chemisorption of arsenic occurred according to the Dubinin-Radushkevich equation. Adsorption parameters from the Langmuir, Freundlich, and Temkin equations showed a greater adsorption and removal of As(III) than As(V) by Mn 2 O 3 . Maximum removal of As(III) and As(V) occurred at pH 3-9 and at pH 2, respectively, while removal of As(V) in the pH range of 6-9 was 93% (pH 6) to 61% (pH 9) of the maximum removal. Zeta potential measurements for Mn 2 O 3 in As(III) was likely converted to As(V) solutions indicated that As(III) was likely converted to As(V) on the Mn 2 O 3 surface at pH 3-9. Overall, the effective Mn 2 O 3 sorbent rapidly removed As(III) and As(V) from water in the pH range of 6-9 for natural waters.
Removal of arsenic from water using manganese (III) oxide: Adsorption of As(III) and As(V)
Removal of arsenic from water was evaluated with manganese (III) oxide (Mn 2 O 3 ) as adsorbent. Adsorption of As(III) and As(V) onto Mn 2 O 3 was favorable according to the Langmuir and Freundlich adsorption equilibrium equations, while chemisorption of arsenic occurred according to the Dubinin-Radushkevich equation. Adsorption parameters from the Langmuir, Freundlich, and Temkin equations showed a greater adsorption and removal of As(III) than As(V) by Mn 2 O 3 . Maximum removal of As(III) and As(V) occurred at pH 3-9 and at pH 2, respectively, while removal of As(V) in the pH range of 6-9 was 93% (pH 6) to 61% (pH 9) of the maximum removal. Zeta potential measurements for Mn 2 O 3 in As(III) was likely converted to As(V) solutions indicated that As(III) was likely converted to As(V) on the Mn 2 O 3 surface at pH 3-9. Overall, the effective Mn 2 O 3 sorbent rapidly removed As(III) and As(V) from water in the pH range of 6-9 for natural waters.
Removal of arsenic from water using manganese (III) oxide: Adsorption of As(III) and As(V)
Babaeivelni, Kamel (Autor:in) / Khodadoust, Amid P
2016
Aufsatz (Zeitschrift)
Englisch
USA , Recht , Zeitschrift , Datenverarbeitung
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