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Appl. Sci. 2019, 9(3), 547;

Efficient Removal of Heavy Metal Ions in Wastewater by Using a Novel Alginate-EDTA Hybrid Aerogel

AnHui Province Key Laboratory of Optoelectronic and Magnetism Functional Materials, College of Chemistry and Chemical Engineering, Anqing Normal University, Anqing 246133, China
Institute of Applied and Physical Chemistry, Faculty 2 (Chemistry/Biology), University of Bremen, D-28359 Bremen, Germany
Authors to whom correspondence should be addressed.
Received: 5 January 2019 / Revised: 3 February 2019 / Accepted: 3 February 2019 / Published: 6 February 2019
(This article belongs to the Section Chemistry)
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In this study, we prepared a novel calcium alginate-disodium ethylenediaminetetraacetate dihydrate hybrid aerogel (Alg-EDTA) by chemical grafting and vacuum-freeze-drying to remove heavy metal ions from wastewater. Experimental results show that the as-prepared Alg-EDTA adsorbent has a high affinity for heavy metal ions, such as Cd2+, Pb2+, Cu2+, Cr3+, and Co2+, and can adsorb >85% of metal ions from the corresponding solution. Alg-EDTA also exhibits high selectivity toward Cd2+, and the maximum adsorption capacity for Cd2+ reached 177.3 mg/g, which exceeds the adsorption capacity of most reported Cd2+-adsorbents. Adsorbent regeneration can be achieved by a simple acid-washing process, and adsorption performance of Alg-EDTA remains stable after repeated use. All these findings indicate that Alg-EDTA has a promising prospect in the treatment of heavy metal ions wastewater. View Full-Text
Keywords: heavy metal ions; sorbent; aerogel; sodium alginate heavy metal ions; sorbent; aerogel; sodium alginate

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Wang, M.; Wang, Z.; Zhou, X.; Li, S. Efficient Removal of Heavy Metal Ions in Wastewater by Using a Novel Alginate-EDTA Hybrid Aerogel. Appl. Sci. 2019, 9, 547.

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