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Micro-encapsulated organic phase for enhanced bioremediation of hydrophobic organic pollutants

Paper ID Volume ID Publish Year Pages File Format Full-Text
18204 42714 2006 7 PDF Available
Title
Micro-encapsulated organic phase for enhanced bioremediation of hydrophobic organic pollutants
Abstract

Atrazine, one of the most widely used pesticides, is a relatively hydrophobic organic pollutant (HOP) that contaminates ground and surface waters. Bioremediation of this pesticide by the bacterium Pseudomonas sp. strain ADP could successfully be performed in a pure aqueous system, with a specific growth rate of 0.0575 h−1 utilizing 100 mg/L of atrazine as a sole nitrogen source. However, growth rate inhibition was observed at higher pesticide concentrations.Liquid-core capsules containing dibutyl sebacate were shown to efficiently extract atrazine from water by equilibrium partitioning. They could subsequently be used as a reservoir for the controlled delivery of the pesticide to the degrading bacteria. Maximum growth rates were found to be constant for the different pesticide concentrations, with values around 0.06 h−1.Compared to pure aqueous and classical two-phase systems [Daugulis AJ. Two-phase partitioning bioreactors: a new technology platform for destroying xenobiotics. Trends Biotechnol 2001;19(11):457–62], the use of liquid-core capsules for performing two-phase biodegradation offers the advantages of reduction of both pollutant and organic phase toxicity thereby allowing high concentrations of pesticides to be degraded.

Keywords
Absorption; Atrazine; Capsules; HOP; LLE; Two-phases partitioning; Water treatment
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Micro-encapsulated organic phase for enhanced bioremediation of hydrophobic organic pollutants
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Publisher
Database: Elsevier - ScienceDirect
Journal: Enzyme and Microbial Technology - Volume 40, Issue 1, 6 December 2006, Pages 25–31
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us