Tig nplawm qab PBDE (polybrominated biphenyl)

- Aug 15, 2018-

Poly Brominated Diphenyl Ethers (hu ua PBDEs), muaj 209 homologues xws li tetrabromodiphenyl ether, pentabromo, hexabromo, octabromo thiab decabromo. Nws coj mus muag polybrominated diphenyl ethers yog ib pawg ntawm diphenyl ether mixtures nrog ntau tus naj npawb ntawm bromine atoms thiab yog vim li no collectively raug xa mus rau raws li polybrominated diphenyl ethers.


Kev siv ntau tshaj ntawm polybrominated diphenyl ethers yog ib yam nplaim hluav taws kub, uas yog ntxiv rau cov kab ke thaum lub sij hawm tsim kev tsim hluav taws xob tsis zoo ntawm qhov khoom.


Ntawm lawv, decabromodiphenyl ether (PBDE-209) yog ib hom tshuaj uas muaj ntau tshaj plaws ntawm bromine atoms nyob rau hauv polybrominated diphenyl ether tsev neeg. Vim tias nws tsis tshua muaj nqi thiab kev ua tau zoo tshaj plaws, mob toxicity yog qhov qis tshaj ntawm txhua tus brominated diphenyl ethers, yog li nws yog ntiaj teb. Nws yog qhov feem ntau siv, xws li nyob rau hauv ntau yam khoom siv hluav taws xob thiab khoom siv tswj tsis zoo, khoom siv, textiles, rooj tog thiab lwm yam khoom. Raws li kev txheeb cais, tam sim no, decabromodiphenyl ether accounts rau ntau dua 75% ntawm cov nyiaj ntawm cov nplaim hluav taws.


Cov kev tshawb fawb kuaj pom tau tias PCBs tuaj yeem cuam tshuam qhov kev tshuav ntawm lub nruab nrog cev hauv hlwb. Cov ntaub ntawv ua ntej los ntawm California Environmental Protection Agency qhia tias PBDE yuav cuam tshuam qee qhov kev sib txuas lus neural nrog cov tswv yim zoo sib xws.


Ntau cov kev tshawb fawb tau pom tias PBDEs ruaj khov nyob rau hauv lub cheeb tsam thiab muaj kev txhawb nqa raws li cov khoom noj khoom haus, nws thiaj li tau txuag hauv tib neeg lub cev los ntawm kev noj mov, niam mis, qhov chaw thiab chaw plua plav. Ntxiv rau ntau cov ntaub ntawv ntawm cov ntaub ntawv hauv lub cev (ntshav, niam mis thiab cov ntaub so ntswg adipose PBDEs, thiab lwm yam), cov kev tshawb fawb tau pom tias PBDE muaj teeb meem rau cov tib neeg raug, tab sis tias PBDEs tau sim cov tsiaj. Mob siab thiab raum toxicity, reproductive toxicity, embryo toxicity, neurotoxicity thiab carcinogenicity tuaj yeem cuam tshuam nrog endocrine thiab hloov qhov kev xav ntawm cov tsiaj, thiab tej zaum yuav muaj kev loj hlob neurotoxicity rau tib neeg, tshwj xeeb tshaj yog cov me nyuam.