Mō te hunga e mahi ana i roto i ngā whare putunga me te rokiroki matū, ka puta he raruraru noa ina kua hipa te rā paunga o ngā maramara houra tunutunu kei roto i te toa i tāia ki runga i te takai. He moumou moni te maka atu i aua mea, nā te mea he iti te utu o te houra tunutunu, inā koa ka rongoatia nuitia. Heoi, mā te whakamahi tonu i aua mea ka ara ake ngā āwangawanga mō te ngoikore o te whai huatanga, ngā tūponotanga mōrearea rānei ki te haumaru.
Hei āwhina i te whakatau i tēnei raruraru, ka tūtohutia te tikanga e whai ake nei. Tohua tēnei aratohu hei whakakore i te whakaaro pohehe, hei whakatau hoki i ngā whakatau whai hua, haumaru hoki.
- Te Mārama ki te Tikanga o te "Rā Paunga" mō te Caustic Soda
Tuatahi, he mea nui kia whakamāramahia ko te houra tunutunu (te konutai hauwai) he matū ahumahi pumau. Ina parakore (he ≥96%) te ihirangi NaOH, ā, ka rongoatia ki roto i ngā āhuatanga maroke, hiri, ka taea te rongoa mō ngā wā roa me te kore e tino pirau. Nā reira, he aha i tohua ai e ngā kaihanga he rā paunga?
Ko te rā paunga kua tohua e pā ana ki te "wā tino whai hua," ehara i te wā ohorere kāore e taea te whakamahi. He tino waiora te houra kautika, he ngāwari ki te mimiti i te makuku mai i te hau, ka hua ake te ngoikore. Ka taea hoki e ia te mimiti i te hauhā waro me te hanga i te konutai kāponāte, ka whakaiti i tōna parakore, ka pāngia hoki te mahi.
Ko te rā paunga o te kaihanga e tohu ana i te wā e whakamanahia ai te parakore me te whai huatanga. I tua atu i tēnei wā, tera pea ka puta he pirau, engari kāore te hua e kore e taea te whakamahi - ko te mea nui ko te nui o te pirau. He nui te pānga o ngā āhuatanga rokiroki ki te roa o te ora. Mena ka rongoatia ki te taiao maroke, hauhautanga, me te hiri pai, ka taea tonu te whakamahi i te houra tunutunu kua pau. I tetahi atu taha, ki te rongoatia ki te taiao haukū, hauhautanga kore, ki te takai pakaru rānei, tera pea ka tere te pirau.
- Tikanga Matua: He Tikanga Hei Whakatau Mēnā Ka Taea Te Whakamahi i te Houkara Kautika Kua Pau
Kāore e hiahiatia he taputapu uaua mō tēnei tikanga, ā, ka taea te mahi i roto i te whare putunga, i te awheawhe rānei. E rua ngā wāhanga o tēnei tikanga: te tirotiro ā-kanohi
Hipanga 1 – Tirotiro Tirohanga: Aromatawai Tuatahi o te Pirautanga
Arotahi ki ngā āhuatanga e toru:
Tae: He mā, he ōrite te houra tunutunu parakore, kāore he ira, he rerekē rānei te tae. Mena ka noho mā, ka ōrite te hua kua pau te wā, kāore he kōwhai, he mangu, he hina rānei, he iti noa iho te pirau. Mena ka puta he kōwhai, he mangu, he rerekē rānei ngā tae, he tino pirau, ā, kāore i te tūtohutia kia whakamahia.
Āhua Tinana: He mārō, he maroke, ā, kāore e piri ki te pā te houra tunutunu kāore anō kia rerekē (ina mau karapu tiaki). Mena he mākū te mata engari kāore e piri), ā, he mārō tonu, tera pea ka taea tonu te whakamahi. Mena he tino piri, he rite ki te whakapiri, he piri, he pakarukaru rānei, he tino kino te pirau, ā, kaua e whakamahia.
Āhua o te Takai: Ko te takai e kore e pakaru, e ārai ana i te hau, e tohu ana i te ngoikore o te takai. Mena kua pakaru te takai, kua kitea rānei he tohu o te makuku, me whakamātautau anō.
Hipanga 2 – Whakamātautau Māmā: Whakaū i te Parakore
Mena kei te kitea he iti noa te pirau i te tirohanga, mahia tēnei whakamātautau māmā hei manatoko i te parakore.
Ngā Rauemi: Wai mahana (30–50°C), kapure, tokotoko whakaoho, rīpene whakamātautau pH, mita pH rānei.
Tukanga: Me mau i ngā karapu tiaki me ngā mōhiti tiaki e tika ana, tāpirihia he wai mahana ki roto i te kapu. Tāpirihia mārire he iti o te houra tunutunu kua pau, me te whakaoho kia memeha rawa. Whakaritea he wai whakapūkara (tata ki te 5% te kukū).
Inehia te pH. Ko te pH o te wairewa houra parakore he 13–14. Mena kei waenga i te 12.5 me te 14 te pH i inehia, he teitei te parakore, ā, he pai te hua mō te nuinga o ngā mahi ahumahi (hei tauira, te horoi, te maimoatanga wai para). Mena kei raro iho i te 12.5 te pH, kua tino heke te parakore, ā, kāore i te tūtohutia kia whakamahia.
Tuhipoka Tāpiri: Mō ngā tono parakore teitei (hei tauira, te whakaputa matū pai), ahakoa he pai te pH, whakaarohia te tuku tauira hei whakamātautau ngaio. Mō ngā tono iti ake te uaua (hei tauira, te horoi whānui, te maimoatanga wai para), ka taea te whakamahi i te hua mena he pai te pH, ā, he pai ngā tohu tirohanga.
- Ngā Taunakitanga Taupānga i runga i te Taumata Whakahekenga
Take 1 – He ngoikore ngawari (āhua noa, he paku memeha, pH 12.5–14): He pai mō ngā mahi iti ake te uaua pēnei i te horoi taputapu/paipa, te whakatikatika pH i roto i te maimoatanga wai para, me te horoi papa. Āta karohia te whakamahi i roto i te hanga tino tika, i ngā tukanga kai rānei. Tērā pea ka paku whakanuia te horopeta (hei tauira, 10–20% te nui ake) hei whakakapi i te whakaiti i te parakore.
Take 2 – Te pirau nui (tae rerekē, pūmau rawa, rite ki te whakapiri, pH i raro i te 12.5): Kaua e whakamahia. Maka atu te hua ki te wāhi tika.
He mea nui: Ngā Āhuatanga e Rua e Kaua ai e Whakamahia te Houkara Kautika Ahakoa Kāore anō kia Pau
Mena kua pakaru te takai, ā, kua poke te hua (hei tauira, nā ngā matū waikawa, ngā rauemi mura/pahū, ētahi atu poke rānei), kaua e whakamahia.
Kaua e whakamahia mēnā he kakara rerekē te hua, he ira pokepoke, he hau whakapataritari rānei.
Wā tuku: 27 Paenga-whāwhā 2026
