Silica/carbon dot nanosorbent for the detection and removal of Pb(II) and Co(II) ions from wastewater

Silica/carbon dot nanosorbent for the detection and removal of Pb(II) and Co(II) ions from wastewater

[Display omitted] •The carbon dots on a cellulose carrier were condensed with silica.•The material is compatible for selective removal of cobalt and lead ions in water.•The adsorption capacity for Co2+ and Pb2+ is 162 ± 6 mg/g and 258 ± 4 mg/g respectively.•The material has the high recyclability of...

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Bibliographic Details
Published in:Chemical engineering journal (Lausanne, Switzerland : 1996) Vol. 500; p. 156610
Main Authors: Ryabchenko, Egor O., Suslov, Arseniy P., Morozov, Nikita A., Krivoshapkina, Elena F.
Format: Journal Article
Language:English
Published: Elsevier B.V 15-11-2024
Subjects:
Carbon dots
Heavy metal removal
Nanomaterials
Pollutants adsorption
Sorbents
Nanomaterials
Pollutants adsorption
Carbon dots
Heavy metal removal
Sorbents
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Summary:[Display omitted] •The carbon dots on a cellulose carrier were condensed with silica.•The material is compatible for selective removal of cobalt and lead ions in water.•The adsorption capacity for Co2+ and Pb2+ is 162 ± 6 mg/g and 258 ± 4 mg/g respectively.•The material has the high recyclability of 3 cycles. In excess, cobalt and lead ions adversely affect both the environment and ecosystems, having negative impact on agricultural plants and feed cultures as well as fish, animal, and human health. In this study, a three-component sorbent based on carbon dots (CDs), hydroxypropyl methyl cellulose (HPMC), and silica (SiO2) was developed for the removal of cobalt(II) and lead(II) ions from aqueous media. CDs synthesized directly on the HPMC surface were condensed with SiO2 via the hydrolysis of tetraethyl siloxane. As a result, a recyclable porous CD/HPMC/SiO2 nanosorbent with high sorption capacity was synthesized. The CD/HPMC/SiO2 nanosorbent has an adsorption capacity of 258 ± 4 mg/g and 168 ± 6 mg/g for lead(II) and cobalt(II), respectively. The material also displayed adequate cyclability as Co2+ and Pb2+ ions were easily removed from the sorbent surface.
ISSN:1385-8947
DOI:10.1016/j.cej.2024.156610