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Effects of Mn(II) and Fe(II) on microbial removal of arsenic (III)
Goal, scope, and background Arsenic contamination in groundwater creates severe health problems in the world. There are many physiochemical and biological methods available for remediation of arsenic from groundwater. Among them, microbial remediation could be taken as one of the least expensive met...
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Published in: | Environmental science and pollution research international 2008-06, Vol.15 (4), p.303-307 |
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Main Authors: | , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Goal, scope, and background
Arsenic contamination in groundwater creates severe health problems in the world. There are many physiochemical and biological methods available for remediation of arsenic from groundwater. Among them, microbial remediation could be taken as one of the least expensive methods, though it takes longer treatment time. The main objective of this research was to study the improvement on remediation by addition of some essential ion salts such as Mn and Fe.
Materials and methods
Staphylococcus aureus
,
Bacillus subtilis
,
Klebsiella oxytoca
, and
Escherichia coli
were taken as model microbes from Dhulikhel, 30 km east from Kathmandu, Nepal.
Results and discussion
Microbes used in this study showed different abilities in their removal of As(III) with and without addition of Mn and Fe salts. The trend of remediation increased with time.
S
.
aureus
was found to be the best among the microbes used. It showed almost 100% removal after 48-h culture, both with and without Fe and Mn salts. Rate of removal of As increased with addition of Fe and Mn for all microbes. Removal efficiency was found to increase by about 32% on average after addition of salts in 24-h cultures of
S
.
aureus
. |
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ISSN: | 0944-1344 1614-7499 |
DOI: | 10.1007/s11356-008-0005-4 |