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Appl. Sci. 2019, 9(3), 547; https://doi.org/10.3390/app9030547

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

1
AnHui Province Key Laboratory of Optoelectronic and Magnetism Functional Materials, College of Chemistry and Chemical Engineering, Anqing Normal University, Anqing 246133, China
2
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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Abstract

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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