I roto i te ao hanga hiko, he hononga tika te tika o te whakaputanga o ngā papa hiko tā (PCBS) ki te mahi me te kounga o ngā hua hiko. Hei taputapu matua i roto i te tukanga keri, he mea tino nui te pumau o te mahi me te tika o te tukatuka o ngā taputapu keri PCB. I roto i ēnei, ko tētahi mea e warewarehia ana engari he tino hira - ko te turanga karāhe - ko te whakatau puku mena ka taea te whakanui ake i te kaha o ngā taputapu.
Ngā painga motuhake o ngā turanga granite
Te tino pumau, te ātete ki te pokanoa wiri
I te wā e keri ana i te PCB, ka huri te mata keri i te tere tere hei tapahi i te papa, ka puta he wiri tonu, he uaua hoki. Ko te turanga karāhe, me tōna hanganga matotoru me te ōrite i hangaia e ngā tukanga whenua i roto i ngā rau miriona tau, he tino kaha te mahi ru. Ko te karāhe kounga teitei e tohuhia ana e "Jinan Green" he pakari te kakano, ā, ka taea te mimiti me te hora i te kaha wiri i puta mai i te whakahaere o ngā taputapu, ka whakarite i te pumau o ngā taputapu keri i te wā e whakahaerehia ana. Ki te whakatauritea ki ētahi atu turanga rauemi, ka taea e te karāhe te whakaiti i te pānga o te wiri ki te tika o te tūnga o te mata keri, ka teitei ake te tika o te tūnga o ngā kōhao kua keria, ā, ka whakahaerehia te pekapeka i roto i te awhe tino iti, ka tutuki i ngā whakaritenga keri tino tika o ngā kōhao moroiti me ngā diameter kōhao iti mō ngā papa PCB matotoru.
Mā te pakeke teitei me te ātete ki te kakahu ka tika te wā roa
He wero nui te mahi keri auau ki te ātete ki te kakahu o te mata o raro. Ka taea e te pakeke Mohs o te karāhe te eke ki te 6 ki te 7, he nui ake i te pakeke o ngā konganuku noa me te nuinga o ngā kirihou hangarau. Mā tēnei āhuatanga pakeke teitei ka taea e te turanga karāhe te pupuri i te papatahi me te maeneene o tōna mata ahakoa te roa o te pānga me te waku o te mata keri. Ahakoa he maha ngā mahi keri, he iti noa te nui o te kakahu, ā, ka whakarite kia roa te mahi pumau o ngā taputapu keri me te tika o te keri. He mea nui tēnei ki ngā umanga hanga PCB nui. Ka taea e ia te whakaiti i te wā kore mahi taputapu me te wā tiaki i puta mai i te kakahu o raro, te whakapai ake i te pai o te whakaputa me te whakaiti i te utu whakaputa katoa.
He iti te horapa me te whakahekenga wera, ka urutau ki ngā huringa pāmahana
I roto i te awheawhe hanga PCB, ka rerekē te pāmahana o te taiao nā ngā āhuatanga pēnei i ngā wā me te marara o te wera o ngā taputapu. He mārama te whānui me te whakahekenga o te turanga i hangaia mai i ngā rauemi noa, ka puta he huringa i roto i ngā tūranga whanaunga o ngā wāhanga taputapu, ā, ka pā ki te tika o te keri. He tino iti te tauwehenga o te whānui wera o te karāneti. Hei tauira, ko te tauwehenga whānui raina o te karāneti noa he tata ki te 4.6 × 10⁻⁶/℃. Ina rerekē te pāmahana, ka noho tonu te rahi o te turanga karāneti, ka whakarato i te turanga tautoko pumau me te pono mō ngā taputapu keri. Ahakoa i te raumati wera, i te takurua makariri rānei, ka taea e ngā taputapu te pupuri i te āhua keri tino tika, kia mau tonu ai te kounga keri mō ngā puranga rerekē o ngā hua PCB.
Whakarerekētia te tikanga o ngā taputapu keri PCB
Ko te tāutanga me te tūnga tika te pūtake mō te tika
I te wā e tukatukahia ana te turanga karāhe, mā roto i ngā tikanga tapahi me te huri taimana matatau, ka taea te whakatutuki i te papatahi tino teitei me te tika o ngā āhuatanga. Hei tauira, ka taea te whakahaere i te ātete papatahi o ngā turanga karāhe tino tika i roto i te whānuitanga o te 1m × 1m ki te kore e neke atu i te 4μm. Mā tēnei ka taea te tāuta tere me te tika o ngā taputapu keri i runga i te papa me te hanganga tūnga tika o te turanga, me te iti o ngā rerekētanga tāutanga o ia wāhanga. Mā te tāutanga me te tūnga tika ka whakaratohia he taurangi mō te nekehanga tika o te mata keri i te wā e whakahaerehia ana ngā taputapu i muri mai, ka whakapai ake i te tika o te keri mai i te pūtake me te whakaiti i ngā raruraru pēnei i te rerekētanga tūnga poka me te diameter poka koretake i puta mai i te tāutanga taputapu hē.
Whakarei ake i te pakari o te hanganga me te whakapai ake i te pumau o te mahi
I te wā e whakamahia ana ngā taputapu keri PCB, haunga tōna ake wiri, ka pāngia pea e te kawe o waho, ngā papa awheawhe koretake me ētahi atu āhuatanga. He tino matotoru te turanga karāhe, ā, he pakari hoki. I muri i te hono tata ki te hanganga matua o ngā taputapu, ka taea e ia te whakanui ake i te pakari o te hanganga o ngā taputapu katoa. Ina pāngia ngā taputapu e te kaha o waho, e te wiri rānei, ka taea e te turanga karāhe te horapa ōrite i te kaha pānga me tōna ake pakari kaha, ka ārai i ngā wāhanga matua o ngā taputapu kei nekehia, kei rerekē rānei nā te kaha koretake, ā, ka whakarite kia pumau te mahi a ngā taputapu i raro i ngā āhuatanga mahi uaua. Ka āwhina te āhua mahi pumau ki te whakaroa i te roa o te ora ratonga o ngā taputapu, ā, ka whakarato i tētahi taiao mahi pumau me te pono mō te keri kounga teitei i te wā kotahi.
Te pānga o te tono whakaputa tuturu
Te hanga PCB mō ngā hua hiko a te kaihoko
I roto i te hanga o ngā PCB mō ngā hua hiko kaihoko pēnei i ngā waea atamai me ngā rorohiko papa, he tino teitei te whakaritenga mō te tika o te keri. Whai muri i te whakaurunga o ngā taputapu keri PCB e te umanga hanga hiko rongonui kua whakauruhia he turanga karāhe, ka piki ake te tere hua mai i te 80% taketake ki te neke atu i te 90%. Kua tino heke ngā raruraru pēnei i te hononga raina ngoikore me te ara iahiko poto i puta mai i te koretake o te tika o te keri. I taua wā, nā te whakaiti i te auau o te tiaki taputapu e te turanga karāhe, kua piki ake te kaha whakaputa marama o tēnei umanga mā te 20%, ā, ka heke te utu whakaputa mō ia wae hua, ā, ka toa i te painga utu me te kounga i roto i te whakataetae mākete kaha.
Te hanga i ngā papa whakahaere ahumahi PCBS
He uaua te taiao mahi o ngā papa whakahaere ahumahi, ā, he tino pakari ngā whakaritenga pono mō ngā PCB. Kua kite tētahi kamupene e tohunga ana ki te hanga papa whakahaere ahumahi i te pikinga nui o te reiti paahitanga o āna papa PCB i roto i ngā whakamātautau taiao uaua pēnei i te pāmahana teitei me te haumākū teitei i muri i te whakamahi i ngā taputapu keri me ngā turanga karāhe. Nā te pumau mahi kua whakarei ake o ngā taputapu ka nui ake te pono o te kounga keri, ka whakarato i te taurangi pakari mō te mahi pumau mo te wā roa o te papa whakahaere ahumahi. Nā ngā hua kounga teitei, kua angitu te hinonga ki te whakatuwhera i ngā mākete kiritaki ahumahi teitei ake, ā, kei te whānui haere tonu tana tauine pakihi.
He tino pai te pumau o ngā turanga karāhe, te pakeke me te ātete ki te kakahu, me te iti o te horapa me te whakahekenga wera, ā, he mea nui te mahi a ngā turanga karāhe ki te whakarei ake i te kaha o ngā taputapu keri PCB. Mai i te tāutanga me te tūnga tika ki te whakarei ake i te pakari o te hanganga o ngā taputapu, tae atu ki tōna mahi tino pai i roto i ngā āhuatanga whakaputa tuturu, kua tino whakaatuhia katoatia tōna uara nui ki te whakapai ake i te tika o te keri me te whai huatanga o te whakaputanga o ngā PCB. I te huarahi o te whai i te tika me te whai huatanga teitei ake i roto i te hanga PCB, ko te turanga karāhe te mea nui ki te wetewete i te kaha nui o ngā taputapu keri PCB, ā, e tika ana kia aro nuihia me te whakamahia whānuitia e te tini o ngā umanga hanga hiko.
Wā tuku: Pipiri-10-2025