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Facile Fabrication of a Low-Cost Alginate-Polyacrylamide Composite Aerogel for the Highly Efficient Removal of Lead Ions

by Zhuqing Wang 1, Qi Yang 1, Xiuqin Zhao 1 and Gang Wei 2,3,*
1
Anhui Key Laboratory of Photoelectric-Magnetic Functional Materials, Anhui Key Laboratory of Functional Coordination Compounds, Anqing Normal University, Anqing 246133, China
2
College of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China
3
Faculty of Production Engineering, University of Bremen, Bremen D-28359, Germany
*
Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(22), 4754; https://doi.org/10.3390/app9224754
Received: 26 October 2019 / Revised: 3 November 2019 / Accepted: 5 November 2019 / Published: 7 November 2019
(This article belongs to the Section Environmental and Sustainable Science and Technology)
In this study, we demonstrate a one-step method for fabricating a novel sodium alginate-polyacrylamide (Alg–PAM) composite aerogel, which exhibits a very high affinity and selectivity towards Pb2+. The as-prepared Alg–PAM composite aerogel can uptake 99.2% of Pb2+ from Pb2+-containing aqueous solution (0.1 mM) and the maximum adsorption capacity for Pb2+ reaches 252.2 mg/g, which is higher than most of the reported Pb2+ adsorbents. Most importantly, the prepared Alg–PAM adsorbent can be regenerated through a simple acid-washing process with only a little loss of the adsorption performance after five adsorption–desorption cycles. In addition, the influence of the experimental conditions, such as the solution pH, contact time, and temperature, on the adsorption performance of the Alg–PAM adsorbent was studied. It is clear that the low-cost raw materials, simple synthesis, regeneration ability, and highly efficient removal performance mean that the designed Alg–PAM aerogel has broad application potential in treating Pb2+-containing wastewater. View Full-Text
Keywords: wastewater; composite; aerogel; adsorbent; heavy metal ions wastewater; composite; aerogel; adsorbent; heavy metal ions
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MDPI and ACS Style

Wang, Z.; Yang, Q.; Zhao, X.; Wei, G. Facile Fabrication of a Low-Cost Alginate-Polyacrylamide Composite Aerogel for the Highly Efficient Removal of Lead Ions. Appl. Sci. 2019, 9, 4754.

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