Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/415
Title: The nonreversibility of adsorption-desorption of dieldrin and lindane on chitin in seawater
Authors: Pérez Peña, Jesús 
Santana-Casiano, J. Magdalena 
González-Dávila, Melchor 
UNESCO Clasification: 251002 Oceanografía química
Keywords: Lindano
Adsorción
Quitina
Adsorption
Desorption
Dieldrin
Lindane
Chitin
Seawater
Agua de mar
Issue Date: 1992
Journal: International Journal of Environmental Analytical Chemistry 
Abstract: Adsorption and desorption of dieldrin and lindane on chitin were investigated in seawater batch tests as a function of chitin concentration, temperature, pH and salinity. For chitin concentrations ranging from 0.5 g l−1 to 12.5 g l−1, the pesticide concentrations were varied from 4 μgl−1 to 65 μg−1 for dieldrin and from 40 μl−1 to 680 μg l−1 for lindane. Both dieldrin and lindane show adsorption-desorption hysteresis at low chitin concentration. At high chitin concentrations (m > 6.25 g l−1 for dieldrin and m > 10 gl−1 for lindane) both pesticides exhibit reversible behaviour. However, only lindane adsorption is affected by chitin concentration. These types of behaviour remain fixed in prewashed chitin. However, an increase in the temperature and a decrease in the salinity made the process become reversible. A resistant-reversible two component model has been applied to account for these types of behaviour and provides a way to explain most of the observed effects by defining mass independent distribution coefficients.
URI: http://hdl.handle.net/10553/415
ISSN: 0306-7319
DOI: 10.1080/03067319208027007
Source: International Journal of Environmental Analytical Chemistry [ISSN 0306-7319], v. 46, p. 163-174
Appears in Collections:Artículos
Thumbnail
Adobe PDF (1,84 MB)
Show full item record

Page view(s)

14
checked on Apr 4, 2020

Download(s)

17
checked on Apr 4, 2020

Google ScholarTM

Check

Altmetric


Share



Export metadata



Items in accedaCRIS are protected by copyright, with all rights reserved, unless otherwise indicated.