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2008•Acta Geologica Sinica - English EditionRequires access

Removal of Arsenic(V) from Aqueous Solutions by Lanthanum‐loaded Zeolite

Hongping Pu, Huang Jiang-bo, JIANG Zhe

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Abstract

Abstract A new adsorption process for the removal of As(V) ion from aqueous solutions is studied in this paper using lanthanum‐loaded zeolite. The removal efficiency of different adsorbents, activated alumina and activated carbon are obtained in the study for comparison. The results show that lanthanum‐loaded zeolite is an effective adsorbent for the removal of As(V) from aqueous solutions. Then, the pH effect and regeneration of modified zeolite on the As(V) removing efficiency are also assessed. It functions with a wide range of pH (2–8). After adsorption, zeolite adsorbed with As(V) ions can be regenerated successfully with 1M NaOH. Based on the data obtained, an adsorption mechanism and the possible complex structure are tentatively presented. Compare to other adsorbents, easy availability of this adsorbent, excellent adsorption capacity, wide optimum pH range, and regeneration are expected to be utilized in practical operations.

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What this paper is about

Abstract A new adsorption process for the removal of As(V) ion from aqueous solutions is studied in this paper using lanthanum‐loaded zeolite. The removal efficiency of different adsorbents, activated alumina and activated carbon are obtained in the study for comparison. The results show that lanthanum‐loaded zeolite is an effective adsorbent for the removal of As(V) from aqueous solutions. Then, the pH effect and regeneration of modified zeolite on the As(V) removing efficiency are also assessed. It functions with a wide range of pH (2–8). After adsorption, zeolite adsorbed with As(V) ions can be regenerated successfully with 1M NaOH. Based on the data obtained, an adsorption mechanism and the possible complex structure are tentatively presented. Compare to other adsorbents, easy availability of this adsorbent, excellent adsorption capacity, wide optimum pH range, and regeneration are expected to be utilized in practical operations.

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Available abstract

Abstract A new adsorption process for the removal of As(V) ion from aqueous solutions is studied in this paper using lanthanum‐loaded zeolite. The removal efficiency of different adsorbents, activated alumina and activated carbon are obtained in the study for comparison. The results show that lanthanum‐loaded zeolite is an effective adsorbent for the removal of As(V) from aqueous solutions. Then, the pH effect and regeneration of modified zeolite on the As(V) removing efficiency are also assessed. It functions with a wide range of pH (2–8). After adsorption, zeolite adsorbed with As(V) ions can be regenerated successfully with 1M NaOH. Based on the data obtained, an adsorption mechanism and the possible complex structure are tentatively presented. Compare to other adsorbents, easy availability of this adsorbent, excellent adsorption capacity, wide optimum pH range, and regeneration are expected to be utilized in practical operations.

Key concepts: Zeolite, Adsorption, Aqueous solution, Lanthanum, Chemistry, Inorganic chemistry, Arsenic, Activated carbon

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