CHROTRAN 1.0: A mathematical and computational model for in situ heavy metal remediation in heterogeneous aquifers
Groundwater contamination by heavy metals is a critical environmental problem for which in situ remediation is frequently the only viable treatment option. For such interventions, a multi-dimensional reactive transport model of relevant biogeochemical processes is invaluable. To this end, we dev...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2017-12-01
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| Series: | Geoscientific Model Development |
| Online Access: | https://www.geosci-model-dev.net/10/4525/2017/gmd-10-4525-2017.pdf |
| Summary: | Groundwater contamination by heavy metals is a critical
environmental problem for which in situ remediation is frequently the only
viable treatment option. For such interventions, a multi-dimensional reactive
transport model of relevant biogeochemical processes is invaluable. To this
end, we developed a model, <span style="" class="text smallcaps">chrotran</span>, for in situ treatment, which
includes full dynamics for five species: a heavy metal to be remediated, an
electron donor, biomass, a nontoxic conservative bio-inhibitor, and a
biocide. Direct abiotic reduction by donor–metal interaction as well as
donor-driven biomass growth and bio-reduction are modeled, along with crucial
processes such as donor sorption, bio-fouling, and biomass death. Our software
implementation handles heterogeneous flow fields, as well as arbitrarily many chemical
species and amendment injection points, and features full coupling between
flow and reactive transport. We describe installation and usage and present
two example simulations demonstrating its unique capabilities. One simulation
suggests an unorthodox approach to remediation of Cr(VI) contamination. |
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| ISSN: | 1991-959X 1991-9603 |