Te Mārama i te Ethylene (C2H4): He Matū Whakahirahira

Te etiheni (C2H4), he matū takurua iti i whakatupu ai i ngā āhuatanga o te pūtaiao me te mātai hortikarutanga. He rahi nui tōna mana ki ngā rauemi pūnaha, ko te etiheni i kitea ai i te hononga karboni-karboni rua e wehi ana i a ia i te hunga e tērā ana.

Te Unga o Te Etiheni i te Taiao

Ki roto i te taiao, ko te etiheni kore rawa i te mea hanga i te ao; he take nui tōna mahi ki runga i te whenua tūmau. Ko te etiheni i kitea ai i ngā totoake me ngā kāwai katoa o ngā rakau, i hangaia mai i te metione i waenganui i ngā wā e nui ana i te ahumoana. Ki te pai rawa i te hōnore kaiwhakaawe rakau, he mea nui te etiheni ki ngā mahi ā-rakau katoa, ina whakaaturia nei:

- Te Whakamātau Ahu: Ko te Etihēnē he kaiwhakatū ahumātaki nō tēnei, e whiu ana i te wā o te whakapauahi i ngā mahoe.

- Te Whakapoheke Rākau: E whakahaere ana te huinga i te wā o te poheke i ngā rākau o te whenua.

- Te Whanaketanga Pūtake: E whakahokia ana te Etihēnē i ngā pūtake matataki me te whakatupu karu, e whakapai ana i te kuhu i ngā tūngaroa.

- Te Whakatata ki te Whakamaharatanga o ngā Pito: E awhina ana ia ki te whakatata ki te mahara i roto i ngā pito me ngā kōrari, e whakatū ana i te whakatipu.

- Te Whakatū Māhina me te Whakarite Ira Tangata: Ka tohe te Etihēnē i te whakatū māhina i ētahi atu rākau, engari ka whakatū anō i te whakatū māhina i ētahi momo rākau e pā ana, pēnei i te kōwhai. Ki ngā rākau e rua ngā ira tangata, ka taea e te Etihēnē te whakarerekē i te tuku o te whakariterite i te wā o te whakatū māhina.

Etihēnē: Tōna Kaiwhakatū Matua i te Arometa

Ki waho i tana huanga matua, he maha ngā whakamahi pumau a te ētihene. Ko ia kotahi o ngā mea katoa e whai hua ana i te ao, ko te mana ētihene he tūranga matua mō te rohe petrohema. Ahakoa iti, kei raro i ngā 75% o ngā hua petrohema ngā mea ētihene, e whakaatu ana i tana uara nui ki te taketake.

Ko te ētihene te matera matua mō te hanga i ngā mea hokohoko e rereke ana, inaianei:

- Rara Hokinga: Whakamahia i ngā kākahu me ngā mea hanga kapa.

- Rama Hokinga: He mea iti nei i te hanga atu i ngā rama mahiti me ngā mea rama ranei.

- Plastihi: He mea nui te ētihene i te hanga i te poliētihene me te polivinil klorida (PVC), ka whakamahia nui atu i te pākete me te hanga whare.

- Hanganga Eitana: Ko te ētihene he mea tuatahitia mō te eitana hokinga (pana), ka whakamahia nui atu i ngā mona me ngā whakamahi pumau.

- Rara Atu: E whiwhi ana te etihene i te mahi hei whakararu i ngā rara atu pērā mai i ngā rara chloroethene (vinyl chloride), styrene, ngā rara epoxy, āpure ahua, acetaldehyde, me ngā puhipuhi.

Te Uara ōrite o te Etihene

Kua whakamahia te whakararu o te etihene hei tohu mo te taha o tauiwi e paunga ana i runga i te whenua o te hoko rara petoro. Ka kitea he tauiwi nui rawa te hunga e whakararu nei i te etihene, ka tohe tonu ki te mana o te kaihokohoko raro me te rara, e hāngai ana ki te oranga o te haerenga whenua.

Whakamutunga

Ki te mutunga, ko te etihene (C2H4) kaore i te mea nui noa iho i roto i te ao o te rara matū, engari e whai wāhi ana hoki i ngā mahi eko nekura me ngā mahi pakihi. Ko tana tūranga hei horomōhio mō te whenua me te nui o tana whakamahi i te hanga i ngā momo hōhonu e whakaatu ana i tana uara. Me mohiotia te etihene, ka whakanuia ai tātou i ngā mahi a te taiao me ngā pai anō hoki i te take o te pūtaiao, e whakatika ana i ngā pai anō i roto i te whenua mahi me te hanga.