Στο βιντεο χρησιμοποιειται το υλικο
styrofoam (το γνωστο φελιζολ?)**
Το οποιο περιεχει αυτο το υλικο
Polystyrene
Στο αρθρο γραφει :
Health and fire hazards
There is concern about the trace presence of polystyrene's production chemicals in the final plastic product, most of which are
toxic if not removed. For instance
benzene, which is used to produce
ethylbenzene for styrene, is a known
carcinogen.
As well, unpolymerized styrene may pose health risks. Nevertheless, the
EPA states:
“ Styrene is primarily used in the production of polystyrene plastics and resins. Acute (short-term) exposure to styrene in humans results in mucous membrane and eye irritation, and gastrointestinal effects. Chronic (long-term) exposure to styrene in humans results in effects on the central nervous system (CNS), such as headache, fatigue, weakness, and depression, CSN dysfunction, hearing loss, and peripheral neuropathy. Human studies are inconclusive on the reproductive and developmental effects of styrene; several studies did not report an increase in developmental effects in women who worked in the plastics industry, while an increased frequency of spontaneous abortions and decreased frequency of births were reported in another study. Several epidemiologic studies suggest there may be an association between styrene exposure and an increased risk of leukemia and lymphoma. However, the evidence is inconclusive due to confounding factors. EPA has not given a formal carcinogen classification to styrene........"
** στην τελευταια παραγραφο
το αρθρο νομιζω διαχωριζει τα ειδη
"The word
styrofoam is often used as a
generic term for expanded
polystyrene foam, such as disposable coffee cups, coolers or packaging material, which are typically white and are made of expanded polystyrene beads. This is different from the expanded polystyrene used for Styrofoam insulation, and is also different from the "crunchy" Styrofoam made for craft applications."
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Τι μαθαινει ο ανθρωπος!!
για το
τσιμεντο
"Bacterial corrosion Bacteria themselves do not have noticeable effect on concrete. However,
anaerobic bacteria (
Thiobacillus) in untreated sewage tend to produce
hydrogen sulfide, which is then oxidized by
aerobic bacteria present in
biofilm on the concrete surface above the water level to
sulfuric acid which dissolves the carbonates in the cured cement and causes strength loss. Concrete floors lying on ground that contains
pyrite are also at risk. Using
limestone as the aggregate makes the concrete more resistant to acids, and the sewage may be pretreated by ways increasing pH or oxidizing or precipitating the sulfides in order to inhibit the activity of sulfide utilizing bacteria."
Και κατι λεγαμε για υδροθειο (σουλφιδιο του υδρογονου H2S) σε περιοχες του βυθου του ενυδρειου που δεν οξυγονωνονται και φιλμ.
Μπορει καποιος "χημικος" να μας πει αν πειραζουν τελικα το νερο τα υλικα?
ΥΓ πολυ ερευνα για ενα αποτελεσμα που δεν με ενθουσιασε καθολου (το αντιθετο).