PCB ua ʻike ʻia i ke kenekulia 19. I kēlā manawa, hoʻohana nui ʻia nā kaʻa a ke piʻi nei ka makemake i ka ʻaila. Hoʻomaʻemaʻeʻia ka’enela mai kaʻailaʻaila, a ua hoʻokuʻuʻia ka nui o nā kinikona, e like me benzene, ma ke kaʻina hana. Ke hoʻomehana ʻia ka benzene, hoʻohui ʻia ka chlorine e hana i kahi kemika hou i kapa ʻia ʻo Polychlorinated biphenyls (PCB). I kēia manawa, aia 209 mau mea pili i ka PCB, helu ʻia e like me ka helu o nā ions chlorine i loko o lākou a ma kahi e hoʻokomo ʻia ai.

Ke ʻano a me ka hoʻohana

ʻO ka PCB kahi mea hana ʻenehana me nā waiwai penei:

1. Ikaika ka hoʻoili wela, akā ʻaʻohe hoʻoili uila.

2. ʻAʻole maʻalahi e puhi.

3. Ka waiwai paʻa, ʻaʻohe hoʻololi kemika.

4. ʻAʻole i hoʻoheheʻe ʻia i ka wai, he mea momona.

Ma muli o kēia mau waiwai, ua manaʻo mua ʻia ʻo PCB he akua e ka ʻoihana a ua hoʻohana nui ʻia e like me ka dielectric, i nā mea uila e like me nā capacitors a me nā mea hoʻololi, a i ʻole he wai hoʻololi wela e hoʻoponopono i ka mahana e hana ai nā mea kani.

I nā lā mua, ʻaʻole ʻike ka poʻe e pili ana i ka ʻawahia o PCBS a mālama ʻole i ka palekana, a hoʻolei i kahi nui o nā ʻōpala PCB i ke kai. Ma mua wale nō o ka hoʻomaka ʻana o ka maʻi a nā mea hana i hana i ka PCB a loaʻa i ka ʻepekema puni kaiapili i ka ʻike PCB i nā meaola kai ua hoʻomaka ka poʻe e nānā i nā pilikia i hoʻokumu ʻia e PCB.

Pehea e komo ai ka PCB i ke kino

ʻO ka nui o nā ʻōpala PCB e hōʻiliʻili i loko o nā ʻāina, hiki ke hoʻokuʻu i ke kinoea. Over time, the waste can end up in lakes or oceans. ʻOiai ʻaʻole hiki ke hoʻoheheʻe ʻia ʻo PCBS i ka wai, hiki ke hoʻoheheʻe ʻia i nā aila a me nā momona, i hiki ke hōʻiliʻili i nā meaola kai, ʻoi aku ka nui o nā mea e like me ka manō a me nā dolphins. Inu ʻia ʻo PCBS ke ʻai mākou i ka iʻa hohonu a i ʻole nā ​​meaʻai i haumia ʻole ʻia, e like me nā huahana waiū, nā momona momona a me nā aila. PCB ingested is mainly stored in human adipose tissue, can be transmitted to the fetus via the placenta during pregnancy, and also released in human milk.

Nā hopena o PCB ma ke kino o ke kanaka

Poino i ke ake a me nā puʻupaʻa

Hoʻopilikia ka ʻili i ka ʻekene, ʻulaʻula a pili i ka pigment

ʻUlaʻula nā maka, pehu, ʻoluʻolu ʻole a hoʻonui ʻia nā mea huna

ʻO ka lohi o ka ʻōnaehana ʻōnaehana kūleʻa, ka lōlō o nā lima a me nā wāwae haʻalulu, hoʻoliʻiliʻi hoʻomanaʻo, ālai ʻia ka hoʻomohala ʻike

Hoʻopilikia ka hana hānau i ka huna ʻana o ka hormone a hōʻemi i ka ulu ʻana o nā pākeke. ʻOi aku ka pilikia o nā pēpē i nā kīnā hānau a me ka ulu lohi ma hope o ke ola

ʻO ka maʻi kanesa, ʻoi aku ka maʻi maʻi ate. Ua hoʻokaʻawale ka International Organization for Research on Cancer i ka PCBS ma ke ʻano he carcinogenic

Ka mana o PCB

I ka 1976, ua pāpā aku ka ʻahaʻōlelo i ka hana, kūʻai aku a me ka hāʻawi ʻana o PCBS.

Mai ka makahiki 1980, ua kau aku kekahi mau ʻāina, e like me Netherlands, Beretania a me Kelemānia, i nā kapu ma PCB.

But even with the restrictions in place, global production was still 22 million pounds a year in 1984-89. It does not seem feasible to stop PCB production worldwide.

ka hopena

ʻO ka haumia PCB, i hōʻiliʻili ʻia i loko o nā makahiki, hiki ke ʻōlelo ʻia ma ke ao holoʻokoʻa, ʻaneʻane ʻoi aku ka nui o nā meaʻai i hoʻoliʻiliʻi ʻia, paʻakikī e hōʻalo loa. ʻO ka mea hiki iā mākou ke hoʻolohe i ka meaʻai a mākou e ʻai ai, hoʻonui i ka ʻike a me ka hopohopo e pili ana i ka mālama ʻana i ke kaiapuni, a me ka manaʻolana e paipai i nā mea hana kulekele e lawe i nā mana kūpono.