The measured concentrations of Cr VI (max. A boring was carried out at the edge of the plot to sample the water from the water table and carry out analyses. Less extensive and lighter pollution was also found by the analyses, especially by cyanides and other heavy metals (lead, cadmium, zinc). The concentration was very high under the chromium plating shop floor (326 mg/kg), diminishing with depth (5.4 mg/kg at a depth of 6 metres). ![]() The results of these analyses show that soil pollution by chromium VI was mainly confined to the plot. " On 19 December 2000, following the contamination of a site requiring rapid decontamination, Monsieur Cramer, State councillor in charge of the department of the interior, agriculture, the environment and energy, stressed the importance of establishing a map of contaminated sites.Įxcavations and borings were carried out on the plots and soil samples were analysed. Chromium and pollutionĪn example at Geneva : (excerpt from the official site of the city of Geneva) Hard chromium plating lines that have recently been fully computerised can have baths of up to 50,000 litres. The chromium/steel friction coefficient is half that of steel/steel Chromium plating gives a fine appearance and adheres to the support very well (molecular binding). Its exceptional hardness is from 1000 to 1100 vickers. It withstands practically all chemicals (except hydrochloric acid), even at high temperatures. Hard chromium is found in all sectors of activity: automotive, steel, engineering, agro-food industry, aeronautics, hydraulics, printing, glassworks, foundries, public works, metallurgy, industrial waste recycling, paper making, pneumatics, plasturgy, tooling, medical etc. It is used to repair worn parts and for the preventive treatment of new parts Hard chromium is a coating that is electroplated onto all types of support: steel, stainless cast iron, copper, bronze, aluminium alloys etc. Hard chromium is food-safe and does not harm the environment. With an excellent quality/price ratio, it protects new parts and repairs. Hard chromium plating: the lowest friction, and one of the hardest, of the anti-wear coatings. Properties of chromiumĪll the properties of chromium. Intensive farming and refining appear to reduce the chromium content of foods. Some food rich in chromium : veal liver, wholemeal cereals, cheese, plums, broccoli, green beans, beer. Interference, interpretation: tobacco, beer consumption, personal hygiene, skin condition, types of work and above all the valency, solubility and physical form of the chromium must be taken into account.Reference value in the general population : Serum Cr 80 %) and a little fecally.The way it acts has not yet been fully explained, but it is known that chromium acts as a co-factor of insulin, facilitating the assimilation of glucose by the cells. ![]() Etymologically, its name comes from the Greek chroma meaning colour, because chromium compounds have a range of colours. ![]() Chromium is a chemical element, symbol Cr and atomic number 24.
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