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VOL. 9, ISSUE 5 (2024)
Rates of Cr(VI) sorption on a column of zero-valent Iron of ground water
Authors
Ravi Prakash, RB Singh
Abstract
The aim of this study was to generate removal rate coefficients that
would be applicable to the Reactive Well Technology, a groundwater remediation
technology that replaces the sand in a filter pack of a conventional well with
a reactive material such as zero-valent iron, Fe(0). The removal rate of Cr(VI)
from the aqueous phase by Fe(0) under flow conditions was measured. The removal
pseudo-first order rate coefficients measured under flow conditions were
comparable to those previously measured under batch conditions that had
significantly greater ratios of solution volume to Fe(0) surface area. Between
the range of 20 and 100 wt-% Fe(0), there was little measurable change in the
reaction kinetics. Thus, it may be possible to include sand into the reactive
filter packs in the event it is necessary to increase filter pack porosity or
to decrease the accumulation of secondary reaction products that may lead to
filter pack plugging. Background water chemistry had only marginal effects on
reaction rate coefficients. A rank ng of the background solutions based on
their pseudo-first order rate coefficients is: 0.2 M NaHCO2 >
distilled water > a carbonate-dominated groundwater. The reduction rates
measured in this study indicated that an 'e(0) filter pack could be used to
lower Cr(VI) concentrations by several orders of magnitude in a once-through
mode of operation of the Reactive Well Technology.
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Pages:19-22
How to cite this article:
Ravi Prakash, RB Singh "Rates of Cr(VI) sorption on a column of zero-valent Iron of ground water". International Journal of Advanced Research and Development, Vol 9, Issue 5, 2024, Pages 19-22
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