Te Awe o te Taiao ki te Tukanga Waikura Whakarewa
Ko te waikura te tukanga o te pirau o te konganuku nā ngā tauhohenga matū, hikohiko rānei ki tōna taiao. I roto i te oranga o ia rā, ko te waikura te mea tino māmā ki te mōhio ko te "waikura" i runga i te rino, engari ka taea tonu te puta i roto i ngā momo konganuku, pērā i te maitai, te konumohe, te parahi, te konutea, tae atu ki ngā koranu motuhake e whakamahia ana i roto i te ahumahi. Ehara i te mea ko te ataahua anake te pānga: ka whakaitihia e te waikura te kaha miihini, ka whakapotohia te roa o te ora o ngā taputapu, ka piki ake ngā utu tiaki, ā, i ētahi wā ka puta he pakaru hanganga morearea. Nā te mea he kaha te awe o ngā āhuatanga taiao ki te waikura, he mea nui te mārama ki ngā awe taiao hei ārai, hei whakaroa rānei i tōna tere.
Ngā Kaupapa Taketake o te Tukanga Waikura: Ngā Tauhohenga Hikohiko
Ko te nuinga o te waikura o ngā konganuku i roto i te taiao ka puta mā roto i ngā tikanga hikohiko. He rohe moroiti-anode me te cathode kei ngā mata konganuku i hangaia e ngā rerekētanga hanganga, ngā ahotea toenga, te pā atu rānei ki ētahi atu konganuku. I te anode, ka pāngia te konganuku e te waikura (ka tukuna ngā irahiko) ka rewa hei katote:
M → Mⁿ⁺ + ne⁻
Ka rere ngā irahiko kua tukuna ki te rohe katote, ā, ka whakamahia mō ngā tauhohenga whakaiti, hei tauira, te whakaiti i te hāora i roto i te otinga kūpapa:
O₂ + 2H₂O + 4e⁻ → 4OH⁻
Mā te noho mai o ngā irahiko (ngā iona kei roto i te wai), te hāora, me ētahi āhuatanga taiao ka whakatau i te tere o te puta o tēnei raupapa tauhohenga. Koinei te take ka roa ake te ora o ngā konganuku i te hau maroke, engari ka tere ake te pirau i ngā taiao makuku, i te wai moana rānei.
1. Te haumākū me te aroaro o te wai
Ko te wai te mea tino kaha ki te waikura. Mā te wai ka puta he paparanga irahiko ki runga i te mata whakarewa, ka taea ai e ngā iona te neke me te puta o ngā tauhohenga hiko. I roto i te hau tino maroke, ka puhoi te tere o te waikura nā te mea kāore he reo kawe irahiko.
He mea nui te haumākū whanaunga. I ētahi taumata haumākū—i runga ake i te 60–70% mō ngā āhuatanga āhuarangi maha—ka taea e ngā mata whakarewa te hanga i tētahi kiriata wai angiangi hei tīmata i te waikura. Ko te hauhautanga o te pō, te tomairangi, ngā rerekētanga pāmahana rānei e meinga ai ngā paipa me ngā tāke kia werawera ka tere ake te waikura mā te hanga i tētahi huringa mākū-maroke kaha.
He mea morearea ngā huringa mākū-maroke nā te mea i te maroketanga o te mata, ka nui ake te kukū o ngā tote me ngā poke kua rewa, ka nui ake te kawe hiko o te wai e toe ana, ā, ka tere ake te tauhohenga. Ina mākū anō, ka rewa ngā iona, ka whānui ake te rohe whakaeke.
2. Te Hāora Whakarewa me te Whakapūngao Rerekē
Ko te hāora te pūtake matua o te tauhohenga katote i roto i te nuinga o ngā take waikura. Ko ngā taiao hāora-nui ka tere ake te waikura, engari he rerekētanga: ko ētahi konganuku, pērā i te konumohe me te maitai kore waikura, ka taea te hanga i tētahi paparanga korehau (he waikura angiangi) e pumau ana i roto i ngā āhuatanga hāora, ā, nō reira he ātete ake.
Ko tētahi atu raruraru nui ko te rerekētanga o te hau, arā, te rerekētanga o ngā taumata hāora i ngā wāhi rerekē. Hei tauira, ko ngā wāhanga whakarewa kua kapi i te paru, i te paru, i ngā kapiti rānei, he iti ake te taumata hāora i ngā wāhi kua kitea. Nā tēnei rerekētanga ka puta he pūtau waikura: ko te wāhi rawakore hāora ka noho hei anode, ā, ka tere ake te memeha. Nō reira, he maha ngā wā ka tino kino te waikura i raro i ngā gaskets, ngā hononga pūtu, ngā wāhanga kua peitahia, ngā wāhi paru rānei.
3. Te Pāmahana o te Taiao
I te nuinga o te wā, ka piki ake te tere o ngā tauhohenga matū me te hikohiko i te pikinga o te pāmahana, nō reira ka tere ake te waikura i ngā pāmahana teitei ake. I roto i ngā taiao ahumahi pēnei i ngā kohua, ngā paipa mamaoa, ngā whare hanga hinu rānei, ka taea hoki e te pāmahana te tere ake i te horapa o te katote me te kino i ngā paninga tiaki.
Heoi, kāore te pānga o te pāmahana e tūhonohono tonu. I roto i te wai, i te pikinga ake o te pāmahana, ka heke te wairewatanga o te hāora. Ko te tikanga tēnei i roto i ētahi pūnaha, mā te pikinga ake o te pāmahana ka taea te whakaiti i te hāora wairewa, engari ko te pānga whakaterenga-tauhohenga te nuinga o te wā ka noho tonu te mana nui—ina koa ka mau tonu te rere o te wai me te tuku hāora.
Hei tāpiritanga, he wāhi nui tō te pāmahana ki te hanganga o te haukū. Ka whakakū te wai i runga i te mata o waho o ngā paipa e kawe ana i ngā wai matao i roto i te hau makuku, ka hangaia he āhuatanga pai mō te waikura o te hau.
4. pH: Te Waikawa me te Pūtake
Ka pā te nui o te waikawa (pH) ki te pumau o ngā hua waikura me te momo matua o te tauhohenga katote. I roto i ngā taiao waikawa (pH iti), ko te tauhohenga whakaiti tino noa ko te whakahekenga o ngā katote hauwai ki te hau hauwai:
2H⁺ + 2e⁻ → H₂
Ka taea e tēnei te whakatere i te waikura i roto i te maha o ngā konganuku, inā koa te maitai waro. I raro i ngā āhuatanga waikawa nui, ka memeha haere te paparanga waikura tiaki, ka waiho te mata o te konganuku kia kitea.
I roto i ngā taiao kawakore, ka kaha ake te ātete o ētahi konganuku nā te hanganga o tētahi paparanga waikura/waikura pumau. Heoi, ka taea hoki e ngā turanga kaha te whakaeke i ētahi konganuku me te kino i te paparanga kore mahi, i runga i te momo rauemi me ngā katote kei roto.
5. Ngā Iona Tote me te Hauhāora: Ngā Hoariri Matua o te Taiao Moana
He rongonui te wai moana me ngā taiao takutai moana mō te waikura, nā te nui o te pūhaumāota (Cl⁻) i roto i te wai. Ka whakanuia e ngā katote pūhaumāota te kawe hiko o te wairewa, ka whakapiki ake i te ia waikura. He mea tino kino ake, ka taea e te pūhaumāota te uru, te kino rānei i te paparanga korehau i runga i te maitai kore waikura me te konumohe, ka puta ai te waikura poka, he mea morearea nā te mea ka puta i te rohe engari ka taea te uru ki te matotoru o te rauemi me te kore e kitea he kino ōrite.
I ngā takutai moana, ehara i te mea ko te wai moana tika anake te mea morearea, engari ko ngā tote hau e piri ana ki ngā mata hanganga. Ina piki ake te haumākū, ka rewa ngā tote ka hanga i ngā irahiko kukū, ka tere ake te waikura o te hau.
6. Ngā Parahanga Hau: SO₂, NOₓ, me te Waikura Āhuarangi
I ngā wāhi ahumahi, i ngā wāhi tāone nui rānei, ka taea e ngā poke pēnei i te whanariki hauhā (SO₂) me ngā waikura hauota (NOₓ) te rewa ki roto i te wai (tōmairangi, ua rānei) ka hanga waikawa (hei tauira, te waikawa whanariki me te waikawa hauota). Ka whakaitihia te pH o te kiriata wai i runga i ngā mata whakarewa, ā, ka piki ake te tere o te waikura. Ko te ua waikawa tētahi tauira tino kino, e tere ake ai te pirau o ngā piriti, ngā taiapa, ngā waka, me ngā whare whakarewa.
Ka taea hoki e ngā matūriki puehu ahumahi te hopu i te makuku ki runga i ngā mata whakarewa, ka hanga he "taiao moroiti" makuku tonu, he nui hoki ngā katote, ka kaha ake te whakaeke waikura i raro i ngā putunga.
7. Te Tere o te Rere me te Horo-Waikura
I roto i ngā pūnaha paipa, ka taea e ngā wai e tere ana te whakararuraru, he huinga o te ruritanga ā-mīhini me te waikura. Ko te rere pōrearea, ngā huringa o te ahunga rere, me ngā wāhi e tata ana ki ngā takirere, ngā tuke, me ngā papu he wāhi ngoikore. Ka taea e te rere tere te tango i ngā kiriata tiaki, i ngā hua waikura rānei e ārai ana i te whakaeke, ka waiho te konganuku kia kitea tonutia.
8. Ngā rauropi iti: Te waikura i pāngia e te mahi koiora
Kei roto hoki i te taiao ngā āhuatanga koiora. Ka puta te waikura i pāngia e te moroiti (MIC) ina pāngia te matū ā-rohe o te mata whakarewa e ngā moroiti pēnei i te huakita whakaiti-whāwhā (SRB), hei tauira mā te whakaputa H₂S, te whakarerekē i te pH, te hanga rānei i tētahi pūtau hikohiko i raro i te kiriata koiora. He maha ngā wā ka kitea te MIC i roto i ngā paipa o raro whenua, ngā tāke rokiroki, ngā pūnaha whakamatao, me ngā whakaurunga moana, ā, ka tere te kitea o te poka.
Rautaki Whakahaere e Hangai ana ki ngā Āhuatanga Taiao
Nā te mea he mea nui te taiao, ko ngā rautaki ārai waikura e aro ana ki te whakarerekē i ngā āhuatanga o te taiao, ki te tiaki rānei i te mata whakarewa, tae atu ki:
1. Te paninga me te peita hei wehe i te konganuku mai i te wai, te hāora me ngā katote kaha.
2. Te tiakitanga katote (te anode patunga tapu, te iahiko pana rānei) hei pehi i ngā tauhohenga waikura i roto i te konganuku turanga.
3. Te whiriwhiri i ngā rauemi e tika ana: hei tauira, me āta whiriwhiri ētahi maitai kore waikura mō ngā taiao hauota.
4. Whakahaerehia te haumākū me te rerenga wai kia kore ai he wai e tau, he wai mākūkū rānei mō te wā roa.
5. Ārai waikura i roto i ngā pūnaha kati pērā i te wai whakamatao, i ngā poiha rānei.
6. He hoahoa pai hei karo i ngā āputa whaiti, i te puranga paru, me ngā wāhi e takoto kau ana.
7. Te whakahaere i ngā moroiti mā te horoi, te whakamate koiora, me te aroturuki.
Te Katinga
Ehara te waikura whakarewa i te mea kotahi noa iho, engari he hua o te taunekeneke matatini i waenga i te rauemi me tōna taiao. Ka taea e te haumākū, te hāora, te pāmahana, te pH, ngā tote pūhaumāota, ngā poke hau, te tere rere, tae noa ki ngā mahi moroiti te whakatere, te whakarerekē rānei i te āhua o te whakaeke waikura. Mā te mārama ki ngā awe o te taiao ka taea e tātou te matapae i ngā wāhi ngoikore, te whiriwhiri i ngā rauemi e tika ana, me te whakatinana i te tiakitanga whai hua. Mā te huarahi tika, ka taea te whakaiti i ngā ngaronga waikura—ngā utu me ngā mōrearea haumaru—ā, ka taea hoki te whakaroa i te roa o te ora o ngā hanganga me ngā taputapu whakarewa.
