[ RadSafe ] Up in smoke: Belief that shisha pipe 'filters out' heavy metals

[ROY HERREN]

Could this also result in increased uptake of Polonium?

http://www.eurekalert.org/pub_releases/2015-02/bc-uis021715.php
Public Release: 

19-Feb-2015 Up in smoke: Belief that shisha pipe 'filters out' heavy metals 
"Contrary to popular belief, only a minimal amount of heavy metals are removed in the 'filtration' process when smoking shisha, also known as hookah, according to research published in the open access journal BMC Public Health. On average, 3% of heavy metals present in tobacco are removed and this would not be enough to protect users from exposure to these toxins"."The most abundant metal present in smoke was uranium, which was present on average in 800 parts per billion across 4 samples. US FDA and WHO recommended maximum limit of Uranium in drinking water of 30 parts per billion (equivalent to 30 micrograms per litre)".    Roy Herren