search
for
 About Bioline  All Journals  Testimonials  Membership  News  Donations


Iranian Journal of Environmental Health, Science and Engineering
Iranian Association of Environmental Health (IAEH)
ISSN: p-ISSN: 1735-1979
Vol. 2, No. 4, 2005, pp. 221-228
Bioline Code: se05032
Full paper language: English
Document type: Research Article
Document available free of charge

Iranian Journal of Environmental Health, Science and Engineering, Vol. 2, No. 4, 2005, pp. 221-228

 en ATRAZINE ADSORPTION DESORPTION BEHAVIOR IN DAREHASALUIE KAVAR CORN FIELD SOIL IN FARS PROVINCE OF IRAN
M. Dehghani, S. Nasseri, S. Amin, K. Naddafi, M. Taghavi, M. Yunosian, N. Maleki

Abstract

Adsorption desorption behaviors of widely applied atrazine soil were studied, employing a batch technique as a case study in Darehasaluie Kavar corn field in Fars Province in 2005. Samples were collected from 0 to 20 cm soil depth, where was cultivated under a crop rotation (corn-wheat) during the past 10 years. Sorption kinetics exhibited two phenomena: an immediate rapid sorption (1.31 μg/g soil after 12 h) followed by a slow sorption process (1.37 μg/g soil after 24 h). Desorption behavior of atrazine was similar to its adsorption, but at a very slower rate. Atrazine desorption efficiencies were much less effective and incomplete even after a long equilibration time (only 9.16% after 96 h). The adsorption desorption rate for most of the time was positively related to the amount of applied atrazine and the time required for equilibration (P<0.01). Desorption data exhibited hysteresis phenomena. Atrazine adsorption data described well according to Freundlich (r2=0.95), Langmuir (r2=0.82) and Temkin (r2=0.84) isotherms. However, the fit to Freundlich adsorption model in a non linear form (1/n <1) was closer than the others. Desorption isotherm could be well described by the Temkin (r2=0.96) and Freundlich (r2=0.92) isotherms, but the fit to Temkin model was closer than that of Freundlich.

Keywords
Adsorption, desorption, atrazine, isotherm, hysteresis phenomena

 
© Copyright 2005 - Tehran University of Medical Sciences Publications
Alternative site location: http://diglib.tums.ac.ir/pub/

Home Faq Resources Email Bioline
© Bioline International, 1989 - 2019, Site last up-dated on 22-Ago-2019.
Site created and maintained by the Reference Center on Environmental Information, CRIA, Brazil
System hosted by the Internet Data Center of Rede Nacional de Ensino e Pesquisa, RNP, Brazil