Removal of two organophosphate pesticides by a bacterial consortium immobilized in alginate or tezontle

被引:41
作者
Yanez-Ocampo, Gustavo [1 ]
Sanchez-Salinas, Enrique [1 ]
Jimenez-Tobon, Gloria Alicia [2 ]
Penninckx, Michel [2 ]
Laura Ortiz-Hernandez, Maria [1 ]
机构
[1] Univ Autonoma Estado Morelos, Ctr Invest Biotecnol, Lab Invest Ambientales, Colonia Chamilpa Cuernav 62209, Morelos, Mexico
[2] Univ Libre Bruxelles, Lab Ecol & Phisiol Microbienne, B-1180 Brussels, Belgium
关键词
Immobilization; Tezontle; Alginate; Removal; Consortium; INOCULANT CARRIERS; BIODEGRADATION; DEGRADATION; PLANT; NITROPHENOL; BIOFILM; GROWTH; BEADS;
D O I
10.1016/j.jhazmat.2009.03.047
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
In order to remove methyl-parathion (MP) and tetrachlorvinphos (TCF), a bacterial consortium was immobilized with two supports consisting of alginate beads or stones of tezontle colonized by biofilm. Removal kinetics were recorded for suspended and immobilized consortium using a mineral salt medium supplemented with MP and TCF at 25 mg/L and with 0.1% (w/v) glucose as a co-substrate. The viability of the consortium cultivated in suspension was maintained for 6 days, whereas the viability of the consortium immobilized in alginate and tezontle supports was maintained for up to 11 and 13 days, respectively. Growth was enhanced when using glucose as a co-substrate. The percentage of MP removed was significantly higher (alpha = 0.05) when consortium was immobilized in alginate beads and biofilm on tezontle as compared to suspension culture. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码:1554 / 1561
页数:8
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