Nui nā ʻano ʻeke plastik, e like me ka polyethylene, ka mea i kapa ʻia ʻo PE, high-density polyethylene (HDPE), low-mi-degree polyethylene (LDPE), kahi mea maʻamau i hoʻohana ʻia no nā ʻeke plastik. Ke hoʻohui ʻole ʻia kēia mau ʻeke plastik maʻamau me nā mea hoʻohaʻahaʻa, he mau haneli mau makahiki e hoʻohaʻahaʻa ʻia, e lawe mai ana i ka pollution hiki ʻole ke noʻonoʻo i nā meaola o ka honua a me ke kaiapuni.
Aia kekahi mau ʻeke i hoʻohaʻahaʻa ʻole ʻia, e like me ka photodegradation, oxidative degradation, stone-plastic degradation, etc., kahi i hoʻohui ʻia ai nā mea hoʻohaʻahaʻa a i ʻole calcium carbonate i ka polyethylene. ʻOi aku ka ʻino o ke kino kanaka.
Aia kekahi mau ʻeke starch hoʻopunipuni, ʻoi aku ke kumukūʻai ma mua o ka plastic maʻamau, akā ua kapa ʻia ʻo ia ʻo "degradable". I ka pōkole, ʻaʻohe mea i hoʻohui ʻia e ka mea hana i ka PE, ʻo ia nō ka polyethylene. ʻOiaʻiʻo, ma ke ʻano he mea kūʻai aku, ʻaʻole hiki iā ʻoe ke ʻike i nā mea āpau.
ʻO ke ʻano hoʻohālikelike maʻalahi loa ke kumu kūʻai ʻāpana. ʻO ke kumukūʻai o nā ʻeke ʻōpala hiki ʻole ke hoʻoheheʻe ʻia he kiʻekiʻe iki ma mua o nā mea maʻamau. ʻO ke kumukūʻai o nā ʻeke ʻōpala biodegradable maoli ʻelua a ʻekolu paha kiʻekiʻe ma mua o nā mea maʻamau. Inā ʻike ʻoe i ke ʻano o ka "ʻeke hoʻohaʻahaʻa" me ke kumu kūʻai haʻahaʻa haʻahaʻa loa, mai manaʻo ʻoe he mea maʻalahi ke kiʻi ʻana, he ʻeke ʻaʻole ia i hoʻohaʻahaʻa loa.
E noʻonoʻo, inā hiki ke hoʻohaʻahaʻa i nā ʻeke me ke kumu kūʻai haʻahaʻa haʻahaʻa, no ke aha e aʻo mau ai ka poʻe ʻepekema i kēlā mau ʻeke plastik biodegradable kiʻekiʻe? ʻO nā ʻeke ʻōpala kahi ʻāpana nui o ka ʻeke plastik, a ʻo kēia ʻōpala palaka maʻamau a me nā ʻeke ʻōpala i kapa ʻia ʻo "degradable" ʻaʻole hiki ke hoʻohaumia.
I loko o ka pōʻaiapili o ke kauoha kapu plastic, hoʻohana nā ʻoihana he nui i ka huaʻōlelo "degradable" e kūʻai aku i kahi helu nui o nā ʻeke plastik hiki ʻole ke hoʻohaʻahaʻa ʻia ma lalo o ka hae o ka "palekana kūlohelohe" a me ka "degradable"; a ʻaʻole maopopo ka poʻe kūʻai aku, maʻalahi Ua manaʻo ʻia ʻo ka mea i kapa ʻia ʻo "degradable" ʻo ia ka "full degradation", i hiki ai i kēia "microplastic" ke lilo hou i ʻōpala e hoʻopōʻino i nā holoholona a me nā kānaka.
No ka hoʻolaha ʻana iā ia, hiki ke hoʻokaʻawale ʻia nā plastic degradable i nā plastic degradable e pili ana i ka petrochemical a me nā plastics degradable bio-based e like me ke kumu o nā mea waiwai.
Wahi a ke ala degradation, hiki ke hoʻokaʻawale ʻia i photodegradation, thermo-oxidative degradation a me biodegradation.
ʻO nā plastik hiki ke paʻi kiʻi: Pono nā kūlana māmā. I ka hapanui o nā hihia, ʻaʻole hiki ke hoʻohaʻahaʻa piha ʻia nā plastic photodegradable i loko o ka ʻōnaehana hoʻolei ʻōpala a i ʻole ma ke ʻano kūlohelohe ma muli o nā kūlana e kū nei.
ʻO nā plastik Thermo-oxidative: ʻO nā plastik e wāwahi ʻia ma lalo o ka hana a ka wela a i ʻole ka hoʻoheheʻe ʻana i kekahi manawa e hopena i nā loli i ke ʻano kemika o ka mea. Ma muli o nā kūlana e kū nei, paʻakikī ke hoʻohaʻahaʻa loa i ka nui o nā hihia.
ʻO nā plastic biodegradable: hiki ke hoʻopili ʻia nā plastic biodegradable me nā kinoea ʻōpala, e like me ka ʻōpala kīhini, a hiki ke hoʻohaʻahaʻa ʻia i loko o ka wai a me ka carbon dioxide. Hiki nō hoʻi i nā plastic i hoʻokumu ʻia i ka bio ke hoʻemi i ka hoʻokuʻu ʻana i ka carbon dioxide. Ke hoʻohālikelike ʻia me nā plastics maʻamau, hiki i nā plastics bio-based ke hōʻemi i ka hoʻohana ʻana i ka aila ma 30% a 50%.
E hoʻomaopopo i ka ʻokoʻa ma waena o ka degradable a me ka degradable piha, makemake anei ʻoe e hoʻolilo i ke kālā ma nā ʻeke ʻōpala piha degradable?
No mākou iho, no kā mākou poʻe mamo, no nā mea ola ma ka honua, a no kahi nohona maikaʻi aʻe, pono mākou e ʻike i ka wā lōʻihi.
Ka manawa hoʻouna: Feb-14-2022