Environmental Engineering Reference
In-Depth Information
Fig. 3
Growth response of KUMAs1 in nutrient (
a
) and minimal liquid medium (
b
) supplemented
with 2 mM As(III) and As(V); growth response of KUMAs1 under different pH in minimal
medium supplemented with 2 mM arsenate (
c
) and 2 mM arsenite (
d
); and growth response of
KUMAs1 under different temperature in minimal medium supplemented with 2 mM arsenate (
e
)
and 2 mM arsenite (
f
). Data are the mean of three replications for each treatment regime with ±SD
(
p
= 0.05)
growth phase. The As(V) reduction was found to be cell mass dependent in this
strain, i.e. with increasing biomass As(V) reduction increased (Table
4
). In the fi rst
24 h the reduction rate was slowed irrespective of initial concentration of As(V).
Growth response was found to be better at 0.21 mM and reduced ~33 % of As(V).
But at lower concentration (0.07 mM) reduction rate was very slow and it was up to
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