Ko te Selenium, he rauemi haurua-ā-ira me te rauemi mata ahumahi, ka pā tika tōna mahi ki tōna parakore. I te wā o te tukanga purenga korehau, ko ngā poke hāora tētahi o ngā mea matua e pā ana ki te parakore o te selenium. Ka whakaratohia e tēnei tuhinga he matapakinga taipitopito mō ngā tikanga me ngā tikanga rerekē hei whakaiti i te nui o te hāora i te wā o te purenga selenium mā te whakakore korehau.

I. Te Whakaiti i te Ihirangi Hāora i te Wāhanga Whakamua o te Rauemi Mata

1. Te Whakamaemaetanga Tuatahi o ngā Rauemi Mata

He maha ngā poke o te selenium mata, tae atu ki ngā waikura. I mua i te whakaurunga ki te pūnaha whakakore korehau, me whakamahi ngā tikanga horoi matū hei tango i ngā waikura o te mata. Ko ngā otinga horoi e whakamahia whānuitia ana ko:

• Otinga waikawa hauwaiwaihā waimeha (5-10% te kukū): Ka whakarewa pai i ngā waikura pēnei i te SeO₂
• Ethanol, acetone rānei: Whakamahia hei tango i ngā poke rauropi
• Wai whakakore iona: He maha ngā horoinga hei tango i te waikawa toenga

I muri i te horoinga, me whakamaroke i raro i te hau kore mahi (hei tauira, Ar, N₂ rānei) hei ārai i te waikura anō.

2. Te Maimoatanga i mua i te Whakaiti i ngā Rauemi Mata

Mā te whakaiti i te maimoatanga o te rauemi mata i mua i te whakahorohoro korehau ka taea te whakaiti i te nui o te hāora:

• Te whakaiti i te hauwai: Whakauruhia te hauwai parakore teitei (parakore ≥99.999%) i te 200-300°C hei whakaiti i te SeO₂ ki te selenium taketake
• Te whakaiti warowaihā: Whakaranua te rauemi mata o te selenium ki te paura waro parakore-teitei, ka whakamahana ki te 400-500°C i raro i te korehau, i te hau kore mahi rānei, ka puta te tauhohenga C + SeO₂ → Se + CO₂
• Te whakaiti i te whanariki: Ka taea e ngā hau pēnei i te H₂S te whakaiti i ngā waikura selenium i ngā pāmahana iti noa iho.

II. Te Hoahoa me te Arotau Whakahaere o te Pūnaha Whakamaarama Korehau

1. Te Kōwhiringa me te Whirihoranga o te Pūnaha Korehau

He mea nui te taiao korehau nui hei whakaiti i te nui o te hāora:

• Whakamahia he huinga papu horapa me te papu miihini, me te korehau mutunga e eke ki te 10⁻⁴ Pa te iti rawa
• Me whai mahanga makariri te pūnaha hei ārai i te horapa whakamuri o te mamaoa hinu.
• Me whakamahi ngā hiri whakarewa i ngā hononga katoa hei karo i te putanga hau mai i ngā hiri rapa.
• Me whakaoti te pūnaha i te tango hau i roto i te oumu (200-250°C, 12-24 hāora)

2. Te Mana Tika o te Pāmahana me te Pēhanga Whakatōtō

Ngā huinga tawhā tukanga tino pai:

• Te pāmahana whakatōtō: Ka whakahaerehia i roto i te awhe 220-280°C (i raro iho i te pāmahana kohua o te selenium o te 685°C)
• Pēhanga pūnaha: Puritia i waenga i te 1-10 Pa
• Te tere whakamahana: 5-10°C/min hei karo i te mimiti me te mimiti nui
• Te pāmahana o te rohe whakapūpū: Kia mau tonu ki te 50-80°C kia tino pūpūpū ai te selenium

3. Hangarau Whakatōtō Maha-Wāhanga

Ka taea e te whakahoro maha-wāhanga te whakaiti haere i te nui o te hāora:

• Wāhanga tuatahi: Te whakahorohoro matapōkere hei tango i te nuinga o ngā poke pūngāwerewere
• Wāhanga tuarua: Te whakahaere tika i te pāmahana hei kohi i te wāhanga matua
• Tuatoru o ngā wāhanga: Te whakatōtō puhoi, te pāmahana iti hei whiwhi i te hua tino parakore
  Ka taea te whakamahi i ngā pāmahana whakapūhau rerekē i waenga i ngā wāhanga mō te whakapūhau haurua

III. Ngā Mahi Tukanga Āwhina

1. Hangarau Tiaki Hau Maamaa

Ahakoa e whakahaerehia ana i raro i te korehau, mā te whakaurunga tika o te hau koretake tino parakore ka āwhina i te whakaiti i te nui o te hāora:

• I muri i te whakawātea i te pūnaha, whakakīia ki te hau argon tino parakore (te parakore ≥99.9995%) ki te 1000 Pa
• Whakamahia te tiaki rere hau hihiri, me te tāpiri tonu i te iti o te argon (10-20 sccm)
• Tāutahia ngā pūwhakapai hau tino whai hua ki ngā tomokanga hau hei tango i te toenga o te hāora me te makuku.

2. Te Tāpiri i ngā Kaihoroi Hāora

Mā te tāpiri i ngā kaihoroi hāora e tika ana ki te rauemi mata ka taea te whakaiti i te nui o te hāora:

• Konupora konupora: He kaha te hononga ki te hāora, ka hanga MgO
• Paura konumohe: Ka taea te tango i te hāora me te whanariki i te wā kotahi
• Ngā konganuku whenua onge: Pērā i te Y, La, me ētahi atu, he tino pai ngā pānga tango hāora
  Ko te nui o te kaihoroi hāora he 0.1-0.5 wt% o te rauemi mata; ka pā pea te nui rawa ki te parakore o te selenium.

3. Hangarau Tātari Rewa

Te tātari i te selenium rewa i mua i te whakapūtātanga:

• Whakamahia ngā tātari quartz, ngā tātari uku rānei, he 1-5 μm te rahi o ngā pūwero
• Whakahaerehia te pāmahana tātari i te 220-250°C
• Ka taea te tango i ngā matūriki waikura totoka
• Me tango mua i te hau o ngā tātari i raro i te korehau nui

IV. Te Whakaora me te Rokiroki i Muri i te Maimoatanga

1. Te Kohikohi me te Whakahaere Hua

• Me hoahoa te kaikohi whakapūmau hei hanganga wetewete kia ngāwari ai te tiki rauemi i roto i te taiao kore mahi.
• Me takai ngā poro selenium kua kohia ki roto i tētahi pouaka karapu argon.
• Ka taea te mahi whakairo mata mēnā e tika ana hei tango i ngā paparanga waikura pea.

2. Te Whakahaere Āhuatanga Rokiroki

• Me noho maroke te wāhi rokiroki (te ira tomairangi ≤-60°C)
• Whakamahia he takai hiri rua-paparanga kua whakakiia ki te hau korekore tino parakore
• Te pāmahana rokiroki e taunakitia ana i raro i te 20°C
• Āta karohia te pānga o te mārama ki te rā hei ārai i ngā tauhohenga waikura photocatalytic

V. Te Mana Kounga me te Whakamātautau

1. Hangarau Aroturuki Ipurangi

• Tāutahia ngā tātari hau toenga (RGA) hei aroturuki i te pēhanga hāora ā-wāhanga i te wā tonu
• Whakamahia ngā pūoko hāora hei whakahaere i te nui o te hāora i roto i ngā hau tiaki
• Whakamahia te mātakitakitanga infrared hei tautuhi i ngā tihi mimiti āhuatanga o ngā hononga Se-O

2. Tātari Hua Kua Oti

• Whakamahia te tikanga mimiti hau kore mahi-whero hei whakatau i te nui o te hāora
• Te ine i te papatipu katote tuarua (SIMS) hei tātari i te tohatoha hāora
• Te tirotiro irahiko whakaahua-X (XPS) hei kite i ngā āhua matū o te mata

Mā roto i ngā mehua whānui kua whakamāramahia i runga ake nei, ka taea te whakahaere i te nui o te hāora i raro i te 1 ppm i te wā e purea ana te selenium mā te korehau, kia tutuki ai ngā whakaritenga mō ngā tono selenium tino parakore. I roto i te whakaputanga tuturu, me arotau ngā tawhā tukanga i runga i ngā āhuatanga o ngā taputapu me ngā whakaritenga hua, ā, me whakatū he pūnaha whakahaere kounga tino pakari.