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by
Nigem Din Yousef |
Total Records (
1 ) for
Nigem Din Yousef |
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Emad I. Hussein
,
Jacob H. Jacob
,
Abdel-Salam F. Jahmani
and
Nigem Din Yousef
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Zarqa River (ZR) is an important river basin in Jordan. However,
it is continuously exposed to different types of pollutants including heavy
metals. This study was carried out to determine the concentration of the following
heavy metals in this vital environment: Pb, Cd, Cu and Zn and to enumerate,
isolate and characterize the indigenous bacteria inhabiting this environment
to test their heavy metal tolerance and bioremoval ability. Samples in this
study include four different types: water, soil, sediment and three local plants
(Nerium oleander, Phragmites australis and Nicotenia glauca)
from 13 sampling sites assigned as A1-A13 starting from Kherbat Al-Samra treatment
plant and ending at King Talal dam. High concentration of Pb was detected in
water samples from site A1 (3200 mg L-1) as well as Cd from site
A13 (2500 mg L-1). In soil, Zn was found at high concentrations in
all sampling sites while Cd was found at high concentration only in site A12.
High concentrations of Zn and Cu were detected in sediment samples from sites
A1 and A8, respectively. In case of plant samples, Zn was detected at high concentration
in Nicotenia glauca. A relatively high viable bacterial counts in site
A12 soil and sediment samples were detected (2x1015 and 1.8x1014
CFU mL-1, respectively) and in site A13 water samples (6x1017
CFU mL-1). Identified bacteria belong to Staphylococcus,
Escherichia, Lactobacillus, Bacillus, Pseudomonas,
Micrococcus, Klebsiella, Enterobacter, Alcaligenes,
Mycobacterium, Citrobacter, Corynebacterium, Acetobacter,
Serratia and Salmonella. Among them, Corynebacterium sp.,
was the most effective in heavy metal bioremoval. |
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