About heavy metals There are 10 types of heavy metals that are currently recognized as noxious: cadmium, hexavalent chrome, cyanogen, total mercury, alkyl mercury, selenium, lead, arsenic, fluorine, and boron.
There is no better, more productive solution for safely removing hazardous surface contaminants such as lead based coatings, nuclear contamination, CARC, hexavalent chromium, asbestos, PCBs, mold and other hazards than the MicroContainment™ properties of Sponge Media.
Its purpose is to restrict the use of certain hazardous substances; it prohibits certain products from being placed on the market if the content of Lead Mercury Cadmium Hexavalent chromium Polybrominated biphenyl(PBB) Polybrominated diphenyl ether(PBDE) exceeds certain limits.
Success Story: Metal powder successfully cleans contaminated drinking water| Höganäs The Problem In 2014, the EPA stipulated that the maximum contaminant level(MCL) for hexavalent chromium in drinking water should be no more than 10 micrograms per litre.
Traditionally, they were treated by hard chrome plating. With the tougher environmental legislations related to the usage of hexavalent chrome(Cr6+), industries are looking for alternatives with not only environmental, but also technical and cost benefits.
Target contaminants in soluble form, such as Hexavalent Chromium[Cr(VI)] are adsorbed on the surface of the media, and chemically reduced to more stable compounds, e.g. oxyhydroxide forms, by reaction with the ZVI fraction of the media.
The substances that were discovered to be present in levels that exceeded the standards are as follows: Trichloroethylene Benzene Hexavalent chromium compound Mercury and its compounds Selenium and its compounds Lead and its compounds Arsenic and its compounds Fluorine and its compounds Drawing on the results of soil contamination assessments completed over the past five years, no instances of contamination were detected other than the case mentioned above.
Our findings of water quality analysis for these 7 years have clearly shown that Hexavalent Chromium or Cr(VI) in the Togupon River in this area has been exceeding"Environmental Quality Standards Concerning the Protection of the Human Health"(not exceeding 0.05 mg/L) in Japan at almost all the time in every rainy season.
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