Hiki ke hōʻino ʻia kekahi mea i ka hoʻohana mau ʻana, keu hoʻi nā huahana uila. Eia nō naʻe, ʻaʻole neoneo loa nā mea i hōʻino ʻia a hiki ke hana hou ʻia, e like me PCB. Eia kekahi, me ka holomua o ka ʻepekema a me ka ʻenehana, ua hoʻonui nui ʻia ka nui o nā huahana uila, kahi i hoʻopōkole ai i ko lākou ola lawelawe. Hoʻolei ʻia nā huahana he nui me ka hōʻino ʻole, a laila hopena i nā ʻōpala nui.

Hoʻohou wikiwiki ʻia nā huahana i ka ʻoihana uila, a he mea kupaianaha hoʻi ka helu o ka PCBS i hoʻolei ʻia. I kēlā me kēia makahiki, ʻoi aku ka nui o nā PCBS ma kahi o 50,000 o ka UK, ʻoiai he 100,000 mau tona i Taiwan. ʻO ka hoʻopōʻaiapuni ke kumu o ka mālama ʻana i nā kumuwaiwai a me ka hana ʻōmaʻomaʻo. Ma waho aʻe, e hoʻopōʻino kekahi mau mea ma nā huahana uila i ke kaiapuni, no laila he mea nui ka hana hou ʻana.

ʻO nā mea hao i loko o PCB me nā metala maʻamau: aluminika, keleawe, hao, nickel, kēpau, tin a me zinc, etc. Nā metala makamae: gula, palladium, platinum, kālā, a pēlā aku. Rhodium metals: rhodium, selenium a pēlā aku. Hoʻokomo pū ʻia ʻo PCB i kahi helu nui o polymer pololei a pololei ʻole paha i nā huahana ʻaila, me ka waiwai calorific kiʻekiʻe, hiki ke hoʻohana ʻia lākou e hana i ka ikehu, akā ʻo ka hana ʻana i nā huahana kemika e pili ana, he mea ʻona a hoʻopōʻino ka hapa nui o nā mea. haumia nui.

Hana ʻia nā template PCB i nā mea he nui i hiki ke hana hou inā ʻaʻole hoʻohana maikaʻi ʻia. No laila, pehea e hana hou ai, hoʻolauna mākou i kāna mau ʻanuʻu:

1. Wehe i ka lacquer

Hoʻopili ʻia ka PCB me nā metala pale, a ʻo ka hana mua i ka hana hou ʻana e wehe i ka pena. Pena remover i ke aloha pena remover a me ka alkaline pena remover, ke aloha pena remover meaʻawaʻawa, hoʻopōʻino i ke kanaka kino a me ke kaiapuni, hiki ke hoʻohana i ka sodium hydroxide, ka popopo inhibitor a me nā hoʻomehana hoʻonā.

2. Ka haki

Ma hope o ka hemo ʻana o ka PCB, e haki ia, me ka hoʻopili ʻana i ka hopena, ka haki ʻana a me ka ʻoki ʻana i ka ʻako. ʻO ka mea i hoʻohana pinepine ʻia ka ʻenehana hōʻoki anuanu haʻahaʻa haʻahaʻa, hiki ke hōʻoluʻolu i nā mea paʻakikī a haki iā ia ma hope o ka hoʻopili ʻana, no laila ua hoʻokaʻawale loa ʻia ka hao a me ka hao ʻole.

3. Hoʻokaʻina

Pono e hoʻokaʻawale ʻia nā mea ma hope o ka haki ʻana e like me ka mānoanoa, ka nui o ka ʻāpana, ka conductivity ʻume mākenēki, ka lawe uila uila a me nā ʻano ʻē aʻe o kāna mau ʻāpana, ma ka hoʻokaʻawale maloʻo a pulu hoʻi. Hoʻokaʻawale ka maloʻo ʻana i ka loiloi ʻana i ka maloʻo, ka hoʻokaʻawale ʻana i ka magnet, ka electrostatic, ka paʻakikī a me ka eddy o ka hoʻokaʻawale ʻana, a pēlā aku. Loaʻa ka hoʻokaʻawale ʻana o ka hydrocyclone, flotation, shaker hydraulic, a pēlā aku. A laila hiki iā ʻoe ke hoʻohana hou.