| Title: |
Assessing the influence of agrochemicals on the nature of copper corrosion in the vadose zone of arable land.
|
| Subtitle: |
Part 3: geochemical modelling |
| Issue: |
Conserv Management Archaeol Sites 7 (4) |
| Series: |
Conservation and Management of Archaeological Sites
|
| Volume: |
7
(4)
|
| Page Start/End: |
241 - 260 |
| Biblio Note |
Please note that this is a bibliographic record only, as originally entered into the BIAB database.
The ADS have no files for download, and unfortunately cannot advise further on where to access hard copy or digital versions.
|
| Publication Type: |
Journal
|
| Abstract: |
Third in a series of three papers from a project that has attempted to answer the question `does the application of agrochemicals accelerate the corrosion of archaeological metals in the top 50cm of the soil?'. The authors approached the issue through a combination of field-based experiments, by establishing laboratory microcosms and by using geochemical modelling techniques to understand the processes involved. The paper reports on the geochemical modelling simulations that trace the potential corrosion pathways followed in two sets of laboratory microcosm experiments (`Lab Beakers' and `Lab Bins') and one field experiment (at Palace Leas). This approach uses soil solution as the fluid mediating corrosion in the soil vadose zone. Soil solution was displaced following controlled exposure to fertilisers. Modelling using The Geochemists' Workbench was carried out to mimic the experimental conditions, and predictions were compared with image analysis results, limited XRD analysis and published corrosion observations. The authors focus on a sub-set of the data relating to the behaviour of the thinnest samples of copper in each case. As with the field and laboratory data previously reported, the results are sometimes contradictory, but on balance it is considered that the project has demonstrated that applied agricultural chemicals are likely to accelerate the rate of corrosion of metal objects within 50cm of the surface. In particular it is thought likely that any fertilizers containing KCI (`potash') will be particularly aggressive. It is proposed that geochemical modelling generates plausible corrosion predictions based on post-depositional interaction between archaeological copper and soil solution, and appears to be useful in helping to simplify and understand corrosion pathways in naturally complex systems. Includes French and Spanish summaries. |
| Year of Publication: |
2006
|
| Subjects / Periods: |
| Metal (Auto Detected Subject) |
| Copper (Auto Detected Subject) |
| Beakers (Auto Detected Subject) |
| Spanish Summaries (Auto Detected Subject) |
| Copper Corrosion (Auto Detected Subject) |
|
| Source: |
BIAB
(The British & Irish Archaeological Bibliography (BIAB))
|
| Created Date: |
02 Nov 2006 |
