Difference between revisions of "Team:Aix-Marseille/Integrated Practices/Environment"
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| − | A plenty of studies assess the increase in metals around in environment. Many places and many metals are concerned all over the world. | + | A plenty of studies assess the increase in metals around in environment. Many places and many metals are concerned all over the world. here we'll focuse mainly on Platinum and Palladium |
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| + | ==Roads== | ||
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| + | As platinum and palladium are used as catalic converters the main source of pollution is close the axis of car traffic, i.e. roads and highways. Several studies show differents concentrations as context of measures are always differents and the factors involved in concentration are much complex. | ||
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| + | The average concentration of platinum and palladium can reach values of '''22.74µg/kg''' for platinum and '''120.8µg/kg''' just near the road. As we can forsee, the concentration is dependent of the distance of the road and indeed values fall to 2.04µg/kg and 84.2µg/kg for platinum and palladium respectiveley is measure are carried out 5 meters aways from the road <ref>http://www.sciencedirect.com/science/article/pii/S0048969707006390 Hooda et al., 2007 </ref> | ||
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| + | Plants thriving near the roads accumulate metals as expected as their concentrations for platinum and palladium respectiveley are in average about '''8.64µg/kg''' and '''10µg/kg''' respectiveley<ref>http://www.sciencedirect.com/science/article/pii/S0048969707006390 Hooda et al., 2007 </ref>. | ||
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| + | Near roads in Germany, with a heavy traffic of about 16,000 car a days and with a speed limit of 80km/h, platinum concentrations have been estmiated around '''50µg/kg'''. Concentrations in soils town center have even shown a value of '''90µg/kg'''!<ref>http://www.sciencedirect.com/science/article/pii/S0048969707007905 Wichmann and al., 2007<ref> | ||
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| + | Even greater value have been found, reaching the impressive value of '''132µg/kg! <ref>https://www.ncbi.nlm.nih.gov/pubmed/17310706 Zereini and al., 2007</ref> | ||
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| + | '''Coal''' | ||
| + | 170µg/kg | ||
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| + | <references> | ||
=Solutions= | =Solutions= | ||
