dust roads has significant concentrations of heavy metals, you can be given some use?
Dear Juan Manuel
The samples to be collected at 1 kilometer intervals along 12 km of highway with a small brush and stored in moisture-proof plastic bags. All the soil samples were dried in the open air in a laboratory for 2-3 days. Dried soil samples were passed through a sieve of 230 (63 μm pore diameter) mesh size. Analysed the above samples for Heavy metal if the heavy metals found than this dust may be treated as per attached article treatment process.
Sequential extraction is a powerful method for determining different binding forms and mobility of trace elements. It also gives more information about metal diffusion and toxicity.
Regards,
Prem Baboo
it gives some idea
http://www.pjoes.com/pdf/22.5/Pol.J.Environ.Stud.Vol.22.No.5.1381-1385.pdf
Sequential analysis is a laborious but useful method to separate metals. For a different approach, possibly more effective in recovering metals in a more readily available form from road dust check A.J. Murray's work. Still in development phase I guess:
Check A.j. Murray at researchgate and at
http://www.thenakedscientists.com/HTML/interviews/interview/2217/
kind regards,
Marcel
Sampling
Samples of dust should be collected from a greed of 1 km from the road both on wind as well as off wind direction
Analysis could be performed following the methos suggested by A.J Muuray .The method is reliable
Kind regards
Sahadeb Dey
Plant hyper accumulators along the road sides and different intervals samples should be collected and using Flame AAS the heavy metal contents will be analyze accordingly
Do you want to take samples for analysis or use the dust as a source for reusing the (heavy) metals?
To differentiate between accumulate and deposited,divide the samples in 2 halves . One portion washed using deionized distilled water .Estimate metal in washed vegetation and also the washing it will give clear picture
Sahadeb
Dr Kees, Use the dust as a source for reusing the heavy metals,
"las minas del futuro serán las grandes ciudades"
Juan T.
Dear Juan and Kees,
I already thought that the question was not analytical meant. As mentioned in my first answer Murray's procedures are aimed at recovery of metals, and the method is based on bacterial action in stead of chemical extraction.
je vous propose d'utiliser des plantes indicatrices et accumulatrice c'est mieux.
Instead of Hydrometallurgical technique you can use Bioleaching. Cultivate some fungus and take the supernatant and then add the soil sample to extract metals or you can also cultivate bacteria straight into the collected sample and add little feed of glucose and water so that you will get your metals leached out.
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