Use of Manganic Ferrihydrite to treat As(V) contaminated water

Autor:	S. S. Mohanty, Saroj Sundar Baral, Debasish Mohapatra, G. Roy Chaudhury
Rok vydání:	2008
Předmět:	Langmuir Ecology Chemistry Inorganic chemistry Contaminated water Ferrihydrite Adsorption Adsorption kinetics Mole General Earth and Planetary Sciences Freundlich equation Sorption isotherm Ecology Evolution Behavior and Systematics General Environmental Science
Zdroj:	Chemistry and Ecology. 24:23-33
ISSN:	1029-0370 0275-7540
Popis:	The As(V) removal efficiency of Manganic Ferrihydrite, having a different mole ratio to Fe-Mn, were evaluated. The As(V) removal efficiency of the adsorbent increased with the increase in Mn up to 40–60 mole% in the Ferrihydrite. Thereafter, further increase in the Mn concentration showed an opposite trend. The adsorption efficiency was constant at pH range of 6–7 whereas the efficiency slightly decreased at > pH 7. Adsorption studies were also carried out varying the adsorbent and the adsorbate concentrations, respectively. The adsorption process followed both Freundlich's and Langmuir's adsorption isotherm models. The maximum theoretical uptake was calculated using the two investigated models. Since adsorption efficiency showed better results when the Mn concentration was 40–60 mole%, Manganic Ferrihydrite compound (Fe:Mn ratio 1:1) was used to conclude the experiments. The adsorption kinetics followed dual rates, faster at the beginning and then slower. The adsorption kinetics followed 1st order kineti...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0dc53e897272a1c59cd478c7b09a9be3 https://doi.org/10.1080/02757540701814812 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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