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Volume 7, Issue 3(Suppl)
J Biotechnol Biomater, an open access journal
ISSN: 2155-952X
Euro Biotechnology 2017
September 25-27, 2017
17
th
EURO BIOTECHNOLOGY CONGRESS
September 25-27, 2017 Berlin, Germany
Kinetic parameters of adsorption of pesticides in an organic matrix with agro-industrial and lignocellulosic
residues for a bio-purification system
M Cristina Diez
1,2
, Bárbara Leiva
2
and
Felipe Gallardo
1,2
1
University of La Frontera, Chile
2
CIBAMA-BIOREN, Chile
B
io-purification system is used to adsorb and degrade pesticide spills during handling of products before its application. The
PBS has an organic matrix (biomix) composed of soil, commercial peat and wheat straw (1:1:2). We evaluated the adsorption
capacity of different agro-industrial and lignocellulosic residues, as components of the biomix of the BPS, to treat water contaminated
with pesticides. Sawdust, barley husk, compost and biochar were used in this process. Each biomix and individual components
were characterized, and biomixes were formulated with partial replacement of 50% wheat straw or peat, moistened at 60-70% water
holding capacity (WHC) and pre-incubated for 30 days at 20-25 °C. For kinetic studies, biomixes were contaminated with atrazine
(ATZ), chlorpyrifos (CHL) and iprodione (IPR) at a concentration of 5 mg/L and to attain ionic strength, 0.01 M CaCl
2
was added
to it. Adsorption at 30, 60, 300, 600, 1080 and 1140 min of incubation at 22 ± 1 °C was evaluated. The adsorption isotherms were
carried out with different amounts of biomix and concentration of pesticides for 24 hrs. It was observed that the highest adsorption
capacity was achieved in biochar based biomixes, independent of the type of pesticide. CHL presents the highest adsorption rate, ATZ
presents a constant and linear saturation for other biomezclas not presenting greater difference, and IPR differs its adsorption for each
particular biomix. The Freundlich and Langmuir models were used to describe the kinetics of the adsorption process in the biomixes.
Biography
M Cristina Diez has completed her PhD in 1993 at Universidad Estadual de Campinas, Brazil. She is a Professor in Chemical Engineering Department and, the
Director of Biotechnological Research Center Applied to the Environment (CIBAMA-BIOREN) of La Frontera University. She has published more than 115 papers
in reputed journals. She is a member of FONDECYT's technology board. She is serving as an Editorial Board Member of the
Journal of Soil Science and Plant
Nutrition.
cristina.diez@ufrontera.clM Cristina Diez et al., J Biotechnol Biomater 2017, 7:3(Suppl)
DOI: 10.4172/2155-952X-C1-076