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Appl. Sci. 2018, 8(9), 1518; https://doi.org/10.3390/app8091518

Efficient Removal of Lead Ions from Water by a Low-Cost Alginate-Melamine Hybrid Sorbent

1
AnHui Provice Key Laboratory of Optoelectronic and Magnetism Functional Materials, Anqing Normal University, Anqing 246011, China
2
Faculty of Production Engineering, University of Bremen, Am Fallturm 1, D-28359 Bremen, Germany
*
Authors to whom correspondence should be addressed.
Received: 27 July 2018 / Revised: 29 August 2018 / Accepted: 29 August 2018 / Published: 1 September 2018
(This article belongs to the Special Issue New Materials and Techniques for Environmental Science)
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Abstract

A low-cost alginate-melamine hybrid sorbent (named as Alg-Mel) was designed and synthesized for the removal of Pb2+ from water. The as-prepared Alg-Mel sorbent exhibited high affinity and selectivity to Pb2+. The selectivity coefficients of the Alg-Mel for Pb2+/Cd2+, Pb2+/Cu2+, Pb2+/Cr3+ and Pb2+/Co2+ were all over 7. It is found that the hybrid sorbent could uptake 95.4% of Pb2+ from Pb2+-containing solutions (0.48 mM), and the maximum adsorption capacity for Pb2+ reaches 1.39 mmol/g (287.7 mg/g), which is much higher than that of most reported lead ion-sorbents. Furthermore, the Alg-Mel can be regenerated by a simple acid-washing process and used repeatedly. The results of adsorption mechanism analysis reveal that the adsorption of Pb2+ by Alg-Mel is mainly ascribed to the chemical coordination and ion exchange effects. View Full-Text
Keywords: adsorption; alginate; adsorbent; lead ion; wastewater adsorption; alginate; adsorbent; lead ion; wastewater
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Li, K.; Wu, G.; Wang, M.; Zhou, X.; Wang, Z. Efficient Removal of Lead Ions from Water by a Low-Cost Alginate-Melamine Hybrid Sorbent. Appl. Sci. 2018, 8, 1518.

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