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Poly(β-cyclodextrin)-activated carbon gel composites for removal of pesticides from water

Utzeri, Gianluca LU orcid ; Verissimo, Luis ; Murtinho, Dina ; Pais, Alberto A.C.C. ; Perrin, F. Xavier ; Ziarelli, Fabio ; Iordache, Tanta Verona ; Sarbu, Andrei and Valente, Artur J.M. (2021) In Molecules 26(5).
Abstract

Pesticides are widely used in agriculture to increase and protect crop production. A substantial percentage of the active substances applied is retained in the soil or flows into water courses, constituting a very relevant environmental problem. There are several methods for the removal of pesticides from soils and water; however, their efficiency is still a challenge. An alternative to current methods relies on the use of effective adsorbents in removing pesticides which are, simultaneously, capable of releasing pesticides into the soil when needed. This reduces costs related to their application and waste treatments and, thus, overall environmental costs. In this paper, we describe the synthesis and preparation of activated... (More)

Pesticides are widely used in agriculture to increase and protect crop production. A substantial percentage of the active substances applied is retained in the soil or flows into water courses, constituting a very relevant environmental problem. There are several methods for the removal of pesticides from soils and water; however, their efficiency is still a challenge. An alternative to current methods relies on the use of effective adsorbents in removing pesticides which are, simultaneously, capable of releasing pesticides into the soil when needed. This reduces costs related to their application and waste treatments and, thus, overall environmental costs. In this paper, we describe the synthesis and preparation of activated carbon-containing poly(β-cyclodextrin) composites. The composites were characterized by different techniques and their ability to absorb pesticides was assessed by using two active substances: cymoxanil and imidacloprid. Composites with 5 and 10 wt% of activated carbon showed very good stability, high removal efficiencies (>75%) and pesticide sorption capacity up to ca. 50 mg g-1. The effect of additives (NaCl and urea) was also evaluated. The composites were able to release around 30% of the initial sorbed amount of pesticide without losing the capacity to keep the maximum removal efficiency in sorption/desorption cycles.

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author
; ; ; ; ; ; ; and
publishing date
type
Contribution to journal
publication status
published
keywords
Activated carbon, Hydrogels, Pesticides, Remediation, β-cyclodextrin
in
Molecules
volume
26
issue
5
article number
1426
publisher
MDPI AG
external identifiers
  • pmid:33800794
  • scopus:85103862654
ISSN
1420-3049
DOI
10.3390/molecules26051426
language
English
LU publication?
no
additional info
Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
id
e7dff7bb-97dc-4ea4-b83c-b8a17796a624
date added to LUP
2024-07-22 10:53:46
date last changed
2024-08-15 10:10:31
@article{e7dff7bb-97dc-4ea4-b83c-b8a17796a624,
  abstract     = {{<p>Pesticides are widely used in agriculture to increase and protect crop production. A substantial percentage of the active substances applied is retained in the soil or flows into water courses, constituting a very relevant environmental problem. There are several methods for the removal of pesticides from soils and water; however, their efficiency is still a challenge. An alternative to current methods relies on the use of effective adsorbents in removing pesticides which are, simultaneously, capable of releasing pesticides into the soil when needed. This reduces costs related to their application and waste treatments and, thus, overall environmental costs. In this paper, we describe the synthesis and preparation of activated carbon-containing poly(β-cyclodextrin) composites. The composites were characterized by different techniques and their ability to absorb pesticides was assessed by using two active substances: cymoxanil and imidacloprid. Composites with 5 and 10 wt% of activated carbon showed very good stability, high removal efficiencies (&gt;75%) and pesticide sorption capacity up to ca. 50 mg g<sup>-1</sup>. The effect of additives (NaCl and urea) was also evaluated. The composites were able to release around 30% of the initial sorbed amount of pesticide without losing the capacity to keep the maximum removal efficiency in sorption/desorption cycles.</p>}},
  author       = {{Utzeri, Gianluca and Verissimo, Luis and Murtinho, Dina and Pais, Alberto A.C.C. and Perrin, F. Xavier and Ziarelli, Fabio and Iordache, Tanta Verona and Sarbu, Andrei and Valente, Artur J.M.}},
  issn         = {{1420-3049}},
  keywords     = {{Activated carbon; Hydrogels; Pesticides; Remediation; β-cyclodextrin}},
  language     = {{eng}},
  number       = {{5}},
  publisher    = {{MDPI AG}},
  series       = {{Molecules}},
  title        = {{Poly(β-cyclodextrin)-activated carbon gel composites for removal of pesticides from water}},
  url          = {{http://dx.doi.org/10.3390/molecules26051426}},
  doi          = {{10.3390/molecules26051426}},
  volume       = {{26}},
  year         = {{2021}},
}