|
Document Type |
: |
Article In Journal |
|
Document Title |
: |
BIOREMEDIATION OF CARBOFURAN FROM CONTAMINATED MEDIA USING SOIL BACTERIA BIOREMEDIATION OF CARBOFURAN FROM CONTAMINATED MEDIA USING SOIL BACTERIA |
|
Subject |
: |
BIOREMEDIATION OF CARBOFURAN FROM CONTAMINATED MEDIA USING SOIL BACTERIA |
|
Document Language |
: |
English |
|
Abstract |
: |
The present study aimed to investigate the remediation and removal ability of ten
bacterial isolates, isolated from sandy and clay contaminated Egyptian soils,
against carbofuran. Selected bacteria were inoculated in a nutrient medium
supplied with 3 elevated concentrations of carbofuran (1, 2, 10 ppm), incubated at
30 ºC and 150 rpm for 3 weeks. The 10 investigated bacterial isolates exhibited
remarkable ability for carbofuran removal at a very fast rate even at the highest
concentration. However, this efficiency was a function of carbofuran concentration,
exposure time, bacterial isolates and soil type from which bacteria were isolated.
Very high removal efficiency [RE%(s)] ranges were obtained; 87.8-100, 83.1-100
and 71.2-97.4% at 1, 2 and 10 ppm carbofuran respectively after 3 exposure weeks.
In general, Pseudomonas sp. PS20 isolated from the contaminated sand showed the
highest RE% at all the investigated concentrations confirming its high degradative
ability towards carbofuran. Most of the investigated isolates exhibited their
maximum activity at 1 ppm and gradually decreased till reaching their lowest
removal % at 10 ppm such as Pseudomonas spp. Other spp. such as Legionella spp.
(environmental isolates) and Arcobacter sp., showed their highest achieved RE%(s)
at 2 ppm that declined again at 10 ppm. Regardless bacterial, soil type and
carbofuran concentrations, there was a general trend of increasing carbofuran
RE% with increasing the exposure up to the investigated time (21 day). Maximum
RE%(s) were achieved at the 3-carbofuran concentrations by sandy isolates
although also high RE%(s) were obtained by clay isolates. Therefore, it is
recommended that the present selection could be efficiently used for
bioremediation of effluents and soils contaminated with carbofuran or structurally
similar pesticides. |
|
ISSN |
: |
00 |
|
Journal Name |
: |
Assiut Univ. J. of Botany |
|
Volume |
: |
34 |
|
Issue Number |
: |
2 |
|
Publishing Year |
: |
1426 AH
2005 AD |
|
Article Type |
: |
Article |
|
Added Date |
: |
Sunday, June 21, 2009 |
|
Researchers
| ابتسام | Ebtesam | Investigator | Doctorate | |
| هشام | Hisham | Researcher | Doctorate | |
|