Magnetic Fe₃O₄/sepiolite composite synthesized by chemical co-precipitation method for efficient removal of Eu(III)

Shaoming YuSchool of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei230009, Anhui, China, Tel. +86 551 62901342; Fax: +86 551 62901450Correspondence[email protected]

Xiguang LiuSchool of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei230009, Anhui, China, Tel. +86 551 62901342; Fax: +86 551 62901450Correspondence[email protected]

Gaojin XuSchool of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei230009, Anhui, China, Tel. +86 551 62901342; Fax: +86 551 62901450Correspondence[email protected]

Yong QiuSchool of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei230009, Anhui, China, Tel. +86 551 62901342; Fax: +86 551 62901450Correspondence[email protected]

Leilei ChengSchool of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei230009, Anhui, China, Tel. +86 551 62901342; Fax: +86 551 62901450Correspondence[email protected]

Abstract

In this study, a novel magnetic Fe₃O₄/sepiolite composite (MFSC) was synthesized via chemical co-precipitation method. The synthesized MFSC was characterized by the several kinds of methods. The characterization results showed that MFSC was composed of Fe₃O₄ nanoparticles on the surface of sepiolite. Moreover, MFSC was used as an adsorbent for the removal of Eu(III) from aqueous solutions. The influences of contact time, pH, ionic strength, and temperature were investigated. The synthesized MFSC had a Langmuir adsorption capacity of 30.85 mg/g at 293 ± 1 K, which was much higher than that of some common and low-cost adsorbents. Ion exchange and surface complexation were the main adsorption mechanisms of Eu(III) adsorption on MFSC. The novel MFSC adsorbent is efficient and economical for Eu(III) removal for its good adsorption characteristic, excellent regeneration property, and high magnetic separation efficiency.

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Acknowledgment

Financial support from National Natural Science Foundation of China (21277039) is acknowledged.

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Magnetic Fe₃O₄/sepiolite composite synthesized by chemical co-precipitation method for efficient removal of Eu(III)

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Magnetic Fe₃O₄/sepiolite composite synthesized by chemical co-precipitation method for efficient removal of Eu(III)