@article{ref1,
title="Handling of red silica gravel on sports, play and resort surfaces with special reference to new toxicologic results",
journal="Gesundheitswesen",
year="1993",
author="Heudorf, U.",
volume="55",
number="10",
pages="521-526",
abstract="In 1991 &quot;Kieselrot&quot;, a material with extremely high PCDD/PCDF-contamination up to about 200,000 ng TEQ/kg was detected on many leisure centres and sports fields in Germany. The contaminated grounds were closed, and covered up. The following examinations to prepare the planned decontamination are described here. The need for decontamination of those &quot;Kieselrot&quot;-areas is discussed with special reference to its relevance on behalf of environmental toxicology and preventive medicine. Risk estimates, based on mathematical models had shown a considerable health and cancer risk for the users of such play- and sports grounds. However, recent studies conducted with sportsmen, groundsmen, and residents after many years of contact with &quot;Kieselrot&quot;-covered grounds did not reveal any additional PCDD/PCDF blood fat burden. But raised TEQ-levels and a typical congeneric pattern pointing to a &quot;Kieselrot&quot;-load could be seen in some of the examined children. Following these results it was concluded that children play grounds contaminated with &quot;Kieselrot&quot; should remain closed and should be decontaminated, whereas sports fields could be used again. Another possibility could be the adaption of the decontamination concepts and methods to the proven low bioavailability of PCDD/PCDF from &quot;Kieselrot&quot;.<p /><p>Language: de</p>",
language="de",
issn="0941-3790",
doi="",
url="http://dx.doi.org/"
}