Austrian Journal of Technical and

PS:PDA-1,Palvuaniyazova 
Dilbar 
Alaniyazovna. 
Literature. 
1.Shiro Okata. Environments problems of a 
world. Tokyo. 2017. 
2.Matherials 
UNIDO 
by 
Environments 
situation now a days.NY.2018.
Section 3.
Environmental and health
Eshli Goldberg, prof. of a University
of a Sydney.Australiya. E-mail: Eshli@ com. 
 
MECHANISMS OF TOXICITY EXPOSURE 
Abstract: The article is proves that the 
order to make the evaluation fully comprehensive, it 
was decided to compare also material and fire performance as well as attempt a life cycle 
assessment of a reference product containing halogen
characteristics. 
The tests on the fire 
behaviour of materials with different flame retardants revealed that halogen free flame retardants 
produce 
less 
smoke 
and 
toxic 
fire 
emissions
 
to 
be 
participants 
in 
the 
news process. 
Key words: toxicit, global problem, 
equipment manufacturers. 
 
The environmental behaviour of flame 
retardants has been studied since the 1990s. 
Mainly brominated flame retardants were 
found in many environmental compartments 
and organisms including humans, and some 
individual 
substances 
were 
found 
to 
have toxicproperties. Therefore, alternatives 
have been demanded by authorities, NGOs and 
equipment manufacturers. The EU-funded 
collaborative research project ENFIRO (EU 
research project FP7: 226563, concluded in 
2012) started out from the assumption that not 
enough environmental and health data were 
known of alternatives to the established 
brominated flame retardants. In order to make 
the evaluation fully comprehensive, it was 
decided to compare also material and fire 
performance as well as attempt a life cycle 
assessment of a reference product containing 
halogen free versus brominated flame 
retardants. About a dozen halogen free flame 
retardants were studied representing a large 
 
variety of applications, from engineering 
plastics, printed circuit boards, encapsulants to 
textile and intumescent coatings. A large group 
of the studied flame retardants were found to 
have a good environmental and health profile: 
ammonium polyphosphate (APP), Aluminium 
diethyl 
phosphinate 
(Alpi), 
aluminium 
hydroxide(ATH), 
magnesium 
hydroxide 
(MDH), melamine polyphosphate (MPP), 
dihydrooxaphosphaphenanthrene 
(DOPO), 
zinc stannate (ZS) and zinc hydroxstannate 
(ZHS). Overall, they were found to have a 
much lower tendency to bioaccumulate in fatty 
tissue than the studied brominated flame 
retardants. 
The tests on the fire behaviour of materials 
with different flame retardants revealed that 
halogen free flame retardants produce less 
smoke and toxic fire emissions, with the 
exception of the aryl phosphates RDP and 
BDP 
in 
styrenic 
polymers.
The leachingexperiments showed that the 
 
nature of the polymer is a dominating factor 
and that the leaching behaviour of halogen free 
retardant that has been used in electronics, wire 
and cable insulation, textiles, automobiles and 

---

14 
and 
brominated 
flame 
retardants 
is 
comparable. The more porous or “hydrophilic” 
a polymers is the more flame retardants can be 
released. However, moulded plates which 
represent real world plastic products showed 
much lower leaching levels than extruded 
polymer granules. The impact assessment 
studies 
reconfirmed 
that 
the 
improper waste and recycling treatment of 
electronic products with brominated flame 
retardants can produce dioxins which is not the 
case 
with 
halogen 
free 
alternatives. 
Furthermore, the United States Environmental 
Protection Agency (US-EPA) has been 
carrying out a series of projects related to the 
environmental assessment of alternative flame 
retardants, the “design for environment” 
projects on flame retardants for printed wiring 
boards 
and 
alternatives 
to 
decabromo 
diphenylethers and hexabromocyclododecane 
(HBCD).
In 2009, the U.S. National Oceanic and 
Atmospheric 
Administration 
(NOAA) released a report on polybrominated 
diphenyl ethers(PBDEs) and found that, in 
contrast to earlier reports, they were found 
throughout the U.S. coastal zone. This 
nationwide survey found that New York's 
Hudson Raritan Estuary had the highest overall 
concentrations of PBDEs, both in sediments 
and shellfish. Individual sites with the highest 
PBDE measurements were found in shellfish 
taken from Anaheim Bay, California, and four 
sites in the Hudson Raritan Estuary. 
Watersheds 
that 
include 
the 
Southern 
California Bight, Puget Sound, the central and 
eastern Gulf of Mexico off the coast of Tampa 
and St. Petersburg, in Florida, and the waters 
of Lake Michigan near Chicago and Gary, 
Indiana, also were found to have high PBDE 
concentrations. 
The 
earliest 
flame 
retardants, polychlorinated biphenyls (PCBs), 
were banned in the U.S. in 1977 when it was 
discovered that they were toxic. Industries 
used brominated flame retardants instead, but 
these are now receiving closer scrutiny. In 
2004 and 2008 the EU banned several types 
of polybrominated diphenyl ethers (PBDEs). 
Negotiations between the EPA and the two 
U.S. producers of DecaBDE a flame of the out
 
airplanes, and other applications), Albemarle 
Corporation and Chemtura Corporation, and 
the largest U.S. importer, ICL Industrial 
Products, Inc., resulted in commitments by 
these companies to phase out decaBDE for 
most uses in the United States by December 
31, 2012, and to end all uses by the end of 
2013. The state of California has listed the 
flame 
retardant 
chemical 
chlorinated Tris (tris(1,3-dichloro-2-propyl) 
phosphate or TDCPP) as a chemical known to 
cause cancer. In December 2012, the 
California nonprofit Center for Environmental 
Health filed notices of intent to sue several 
leading retailers and producers of baby 
products for violating California law for failing 
to label products containing this cancer-
causing flame retardant. While the demand for 
brominated and chlorinated flame retardants in 
North America and Western Europe is 
declining, it is rising in all other regions. 
There is a potential association between the 
exposure to the Phosphorus Flame Retardants 
(PFR) in residential indoor dust and the 
development 
of 
allergies, 
asthma 
and 
dermatitis. A study was conducted in 2014 by 
Araki, A. et al. in Japan to assess this 
relationship.They 
found 
a 
significant 
association between the Tris (2-chloro-iso-
propyl) phosphate (TCIPP) and atopic 
dermatitis with an odds ratio of 2.43. They also 
found that the Tributyl phosphate was 
associated with the development of allergic 
rhinitis and asthma with an odds ratio of 2.55 
& 2.85 respectively.
Nearly all Americans tested have trace 
levels of flame retardants in their body. Recent 
research links some of this exposure to dust on 
television sets, which may have been 
generated from the heating of the flame 
retardants in the TV. Careless disposal of TVs 
and other appliances such as microwaves or 
old computers may greatly increase the amount 
of environmental contamination. A recent 
study 
conducted 
by 
Harley