Adsorption of As<sup>III</sup>, As<sup>V</sup> and dimethylarsinic acid onto synthesized lepidocrocite: Fid-Bau Portal

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Adsorption of As^III, As^V and dimethylarsinic acid onto synthesized lepidocrocite

Wan, Junfeng / Simon, Stephane / Deluchat, Véronique / Dictor, Marie-Christine / Dagot, Christophe

The trapping of arsenic by zero valent iron is strongly dependant on iron by-products. Among these, lepidocrite has been scarcely studied. In this work, we studied the adsorption of two inorganic (As^III, As^V) and one organic (dimethylarsinic acid, DMA) arsenic species onto lepidocrocite. pH influence was considered in the range 5 to 9, which corresponds to natural water pH. Langmuir model was used to simulate As adsorption isotherms. Our results showed that lepidocrocite offers high adsorption capacities: up to 0,25, 0,41 and 1 mol for As^V, DMA and As^III could be respectively trapped per kilogram of zero-valent iron. pH influence varied from one arsenic species to another: increasing pH improve As^III and DMA sorption whereas it has a very low effect on As^V sorption.

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Adsorption of As^III, As^V and dimethylarsinic acid onto synthesized lepidocrocite

Wan, Junfeng / Simon, Stephane / Deluchat, Véronique / Dictor, Marie-Christine / Dagot, Christophe

The trapping of arsenic by zero valent iron is strongly dependant on iron by-products. Among these, lepidocrite has been scarcely studied. In this work, we studied the adsorption of two inorganic (As^III, As^V) and one organic (dimethylarsinic acid, DMA) arsenic species onto lepidocrocite. pH influence was considered in the range 5 to 9, which corresponds to natural water pH. Langmuir model was used to simulate As adsorption isotherms. Our results showed that lepidocrocite offers high adsorption capacities: up to 0,25, 0,41 and 1 mol for As^V, DMA and As^III could be respectively trapped per kilogram of zero-valent iron. pH influence varied from one arsenic species to another: increasing pH improve As^III and DMA sorption whereas it has a very low effect on As^V sorption.

Adsorption of As^III, As^V and dimethylarsinic acid onto synthesized lepidocrocite

Wan, Junfeng / Simon, Stephane / Deluchat, Véronique / Dictor, Marie-Christine / Dagot, Christophe

The trapping of arsenic by zero valent iron is strongly dependant on iron by-products. Among these, lepidocrite has been scarcely studied. In this work, we studied the adsorption of two inorganic (As^III, As^V) and one organic (dimethylarsinic acid, DMA) arsenic species onto lepidocrocite. pH influence was considered in the range 5 to 9, which corresponds to natural water pH. Langmuir model was used to simulate As adsorption isotherms. Our results showed that lepidocrocite offers high adsorption capacities: up to 0,25, 0,41 and 1 mol for As^V, DMA and As^III could be respectively trapped per kilogram of zero-valent iron. pH influence varied from one arsenic species to another: increasing pH improve As^III and DMA sorption whereas it has a very low effect on As^V sorption.

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Title:

Adsorption of As^III, As^V and dimethylarsinic acid onto synthesized lepidocrocite

Contributors:

Wan, Junfeng (author) / Simon, Stephane (author) / Deluchat, Véronique (author) / Dictor, Marie-Christine (author) / Dagot, Christophe (author)

Published in:

Journal of Environmental Science and Health, Part A ; 48 ; 1272-1279

Publication date:

2013-08-24

Size:

8 pages

ISSN:

1093-4529 , 1532-4117

DOI:

https://doi.org/10.1080/10934529.2013.776916

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Keywords:

Sorption , iron oxide , inorganic and organic arsenic species , pH

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