ʻO ka "plastic degradable" kahi hopena koʻikoʻi e kāohi ai i ka haumia plastik.
Ua pāpā ʻia ka hoʻohana ʻana i nā plastic non-degradable. He aha ka mea hiki ke hoʻohana? Pehea e hōʻemi ai i ka pollution plastic? E hoʻohaʻahaʻa i ka plastik? E hana ia i mea pili kaiapuni. Akā, hiki anei i nā plastic biodegradable ke hoʻemi maoli i ka haumia plastik? Inā hoʻohui ʻia kekahi mau mea hoʻohui i ka plastic i mea e hoʻohaʻahaʻa ʻia ai, a ua hoʻokumu ʻia ma luna o ka plastic, ʻaʻole anei ia he pollution-free i ke kaiapuni? He nui ka poʻe kānalua. Manaʻo kekahi poʻe he pōʻai hou kēia o ka carnival ʻoihana. No laila, nui nā plastic degradable me ka maikaʻi ʻole a me ke kumukūʻai ma ka mākeke. He mea maikaʻi paha kēia a he mea ʻino paha? E lawe mai anei ia i ke kaomi kaiapuni hou?
ʻO ka mea mua, e hoʻolaha kākou i nā plastic degradable. Hoʻokaʻawale ʻia nā plastic degradable i nā plastic biodegradable, nā plastic degradation thermal oxidative, nā plastics photodegradable a me nā plastic compostable. He "degradable" lākou a pau, akā ʻokoʻa ke kumu kūʻai o nā plasticly oxidatively degradable plastics a me nā plastic photodegradable i nā manawa like ʻole me nā plastic biodegradable a me nā plastic compostable. Ua ʻōlelo ʻia nā plastic-degradable oxygen a me nā plastic-degradable plastic e "nalo" mai ka honua wale nō ma hope o ka ʻike ʻia ʻana i ka wela a i ʻole ka mālamalama no kekahi manawa. Akā ʻo kēia kumu kūʻai haʻahaʻa a "maʻalahi e nalowale" i kapa ʻia ʻo "PM2.5 o ka ʻoihana plastics." No ka mea hiki i kēia mau ʻenehana hoʻohaʻahaʻa ʻelua ke hoʻohaʻahaʻa wale i nā plastik i loko o nā ʻāpana liʻiliʻi ʻike ʻole, akā ʻaʻole hiki ke hoʻolilo iā lākou. ʻAʻole ʻike ʻia kēia mau ʻāpana i ka lewa, ka lepo a me ka wai ma muli o ko lākou ʻano liʻiliʻi a māmā. Hoʻopau ʻia ʻo Z e nā mea ola.
I ka hoʻomaka ʻana o Iune 2019, ua pāpā ʻo ʻEulopa i ka hoʻohana ʻana i nā huahana disposable i hana ʻia me ka thermally oxidatively degradable plastics, a e hoʻopau ʻo Australia i nā plastics i 2022.
Ma Kina kahi i puka mai ai ka "degradation fever", "pseudo-degradable plastics" e like me kēia ke hoʻokipa nei i ka nui o nā mea kūʻai aku e makemake ana e kūʻai i nā "ʻeke plastik degradable" ma ke kumu kūʻai haʻahaʻa akā ʻaʻole ʻike i ka mea pohihihi. ʻO ka "Plastic Restriction Order" i hoʻopuka ʻia ma 2020 pāpā i ka hoʻohana ʻana i nā "ʻeke plastik non-degradable" a ʻaʻole ia e kuhikuhi i nā ʻeke plastik degradable e hoʻohana ʻia. Ma muli o ke kumukūʻai kiʻekiʻe o nā plastic biodegradable, nā plastic oxidative degradation thermal, photodegradable plastics, a i ʻole bio-based hybrid plastics he mau koho maikaʻi nō hoʻi no nā wahi i koi ʻole i ka hoʻohana ʻana i nā plastic biodegradable piha. ʻOiai ʻaʻole hiki ke hoʻohaʻahaʻa ʻia kēia plastik, ma kahi liʻiliʻi e nalowale ana kahi hapa o ka PE.
Eia nō naʻe, i loko o kahi mākeke chaotic, paʻakikī pinepine i nā mea kūʻai aku e ʻike i ke ʻano o nā plastic degradable. ʻO ka ʻoiaʻiʻo, ʻaʻole ʻike ka hapa nui o nā ʻoihana i ka ʻokoʻa ma waena o nā plastic degradable piha a me nā plasticly oxidatively degradable plastics, nā plastics degradable māmā a me nā plastic hybrids bio-based. Koho pinepine lākou i ka mea maʻalahi, me ka manaʻo he hiki ke hoʻohaʻahaʻa. ʻO ia ke kumu e ʻōlelo ai nā mea kūʻai aku: "No ke aha i ʻoi aku ka maikaʻi o kāu kumukūʻai ʻāpana ma mua o nā mea ʻē aʻe? Ma ke ʻano he mea hana, ʻaʻole hiki ke alakaʻi hewa i nā mea kūʻai aku ma ka hōʻailona ʻana i nā laʻana me ka 'degradable' ma ia mau huahana.
ʻO ka plastic degradable maikaʻi loa e lilo i "mea biodegradable piha." I kēia manawa, ʻo ka mea biodegradable i hoʻohana nui ʻia he polylactic acid (PLA), i hana ʻia me nā biomaterials e like me ka starch a me ka palaoa. Ma o nā kaʻina hana e like me ke kanu ʻana i ka lepo, ka hoʻopuehu ʻana, ka hoʻohaʻahaʻa ʻana i ka wai maʻemaʻe, a me ka hoʻohaʻahaʻa ʻana i ka moana, hiki ke hoʻohaʻahaʻa ʻia kēia mea i loko o ka wai a me ke kalapona kalapona e nā microorganism me ka ʻole o ka hoʻokau kaumaha ʻana i ke kaiapuni.
Ma nā kūlanakauhale kahi i hoʻokō ʻia ai ka "plastic ban", hiki iā mākou ke ʻike i nā ʻeke plastik biodegradable e kū ana i ka maʻamau G hou. Ma lalo o ia mea, hiki iā ʻoe ke ʻike i nā hōʻailona o "PBAT + PLA" a me "jj" a i ʻole "nā hua pī". I kēia manawa, ʻo kēia ʻano mea biodegradable wale nō i kū i ka maʻamau he mea hoʻoheheʻe maikaʻi loa ʻaʻohe hopena i ke kaiapuni.
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Ka manawa hoʻouna: Jan-07-2022