ʻO Shuohao Cai, he haumāna kauka no ka ʻepekema lepo, kau ʻo ia i ke koʻokoʻo ʻike me kahi mea hoʻopaʻa sensor multifunction e hiki ai ke ana i nā hohonu like ʻole i ka lepo ma ke Kulanui o Wisconsin-Madison Hancock Agricultural Research Station.
MADISON - Ua hoʻomohala nā mea ʻenekinia o ke Kulanui o Wisconsin-Madison i nā mea ʻike haʻahaʻa haʻahaʻa e hiki ke hāʻawi i ka nānā mau ʻana i ka manawa maoli o ka nitrate i nā ʻano lepo maʻamau o Wisconsin. Hiki i kēia mau mea ʻike electrochemical i paʻi ʻia ke kōkua i ka poʻe mahiʻai e hoʻoholo i nā hoʻoholo hoʻokele waiwai waiwai a ʻike i nā pono waiwai.
"Hiki i kā mākou mau meaʻike ke hāʻawi i ka poʻe mahiʻai i ka hoʻomaopopo maikaʻi ʻana i ke kūlana meaʻai o ko lākou lepo a me ka nui o ka nitrate i loaʻa i kā lākou mea kanu, e kōkua ana iā lākou e hoʻoholo pololei i ka nui o nā mea momona a lākou e pono ai," wahi a Joseph Andrews, ke kaukaʻi kōkua ma ke Kulanui ʻo Harvard. Ua alakaʻi ʻia ke aʻo ʻana e ke Kula ʻo Mechanical Engineering ma ke Kulanui o Wisconsin-Madison. "Inā hiki iā lākou ke hōʻemi i ka nui o nā mea kanu a lākou e kūʻai ai, hiki ke mālama nui ʻia ke kumukūʻai no nā mahiʻai nui."
ʻO ka nitrates kahi meaʻai pono no ka ulu ʻana o ka mea kanu, akā hiki i ka nui o nā nitrates ke lele mai ka lepo a komo i ka wai o ka lepo. He pōʻino kēia ʻano hoʻohaumia i ka poʻe e inu ana i ka wai maikaʻi i hoʻohaumia ʻia a pōʻino i ke kaiapuni. Hiki ke hoʻohana ʻia ka sensor hou o ka poʻe noiʻi ma ke ʻano he mea hana noiʻi mahiʻai e nānā i ka leaching nitrate a kōkua i ka hoʻomohala ʻana i nā hana maikaʻi loa no ka hoʻēmi ʻana i kona hopena ʻino.
ʻO nā ʻano hana i kēia manawa no ka nānā ʻana i ka nitrate lepo he mea hana, pipiʻi, a ʻaʻole hāʻawi i ka ʻikepili manawa maoli. ʻO ia ke kumu i hoʻomaka ai ka loea uila paʻi ʻia ʻo Andrews a me kāna hui e hana i kahi ʻoi aku ka maikaʻi a me ke kumu kūʻai.
I loko o kēia papahana, ua hoʻohana nā mea noiʻi i kahi kaʻina hana paʻi inkjet e hana i kahi sensor potentiometric, kahi ʻano o ka ʻenekini electrochemical kiʻiʻoniʻoni lahilahi. Hoʻohana pinepine ʻia nā mea ʻike potentiometric e ana pono i ka nitrate i loko o nā wai wai. Eia nō naʻe, ʻaʻole kūpono kēia mau mea ʻike no ka hoʻohana ʻana i nā kaiapuni lepo no ka mea hiki i nā ʻāpana lepo nui ke ʻoki i nā mea ʻike a pale i nā ana pololei.
"ʻO ka pilikia nui a mākou e ho'āʻo nei e hoʻoholo,ʻo ia keʻimi i kahi ala e hiki ai i kēia mau meaʻike electrochemical ke hana pono i nā kūlana lepo paʻakikī aʻike pono i nā ion nitrate," wahi a Andrews.
ʻO ka hopena o ka hui e kau i kahi papa o ka polyvinylidene fluoride ma luna o ka mea ʻike. Wahi a Andrews, ʻelua mau hiʻohiʻona koʻikoʻi kēia mea. ʻO ka mua, loaʻa iā ia nā pores liʻiliʻi loa, ma kahi o 400 nanometers ka nui, e ʻae ai i nā ion nitrate e hele i loko o ka pale ʻana i nā ʻāpana lepo. ʻO ka lua, he hydrophilic, ʻo ia hoʻi, huki i ka wai a hoʻopaʻa ʻia e like me ka sponge.
"No laila, ʻoi aku ka maikaʻi o kēlā me kēia wai waiwai nitrate i loko o kā mākou mea ʻike, he mea nui loa ia no ka mea, ua like ka lepo me ka ʻōhuʻu a e nalowale ana ʻoe i ke kaua ma ke ʻano o ka komo ʻana o ka wai i loko o ka mea ʻike inā ʻaʻole hiki iā ʻoe ke loaʻa ka hoʻoheheʻe wai like. Hiki i ka lepo, "wahi a Andrews. "ʻO kēia mau waiwai o ka papa polyvinylidene fluoride e ʻae iā mākou e unuhi i ka wai waiwai nui o ka nitrate, e hāʻawi i ka ʻili o ka sensor a ʻike pono i ka nitrate."
Ua wehewehe nā mea noiʻi i kā lākou holomua ma kahi pepa i paʻi ʻia ma Malaki 2024 ma ka puke pai Advanced Materials Technology.
Ua hoʻāʻo ka hui i kā lākou mea ʻike ma nā ʻano lepo ʻokoʻa ʻelua e pili ana me Wisconsin—nā lepo one, maʻamau i nā ʻāpana ʻākau-waena o ka mokuʻāina, a me nā lepo lepo, maʻamau ma ke komohana hema o Wisconsin—a ua ʻike ʻia ua hoʻopuka nā mea ʻike i nā hopena pololei.
Ke hoʻohui nei nā mea noiʻi i kā lākou sensor nitrate i loko o kahi ʻōnaehana sensor multifunctional a lākou i kapa ai he "sensor sticker," kahi i kau ʻia ai ʻekolu ʻano ʻano ʻike ma luna o kahi ʻili plastik maʻalahi me ka hoʻohana ʻana i kahi kākoʻo paʻa. Loaʻa i nā stickers nā mea ʻike wela a me ka haʻahaʻa.
E hoʻopili ka poʻe noiʻi i kekahi mau mea hoʻopili sensory i kahi pou, e kau iā lākou ma nā kiʻekiʻe kiʻekiʻe, a laila kanu i ka pou i ka lepo. Ua ʻae kēia hoʻonohonoho iā lākou e ana i nā ʻano hohonu o ka lepo.
"Ma ke ana ʻana i ka nitrate, ka makū a me ka mahana ma nā hohonu like ʻole, hiki iā mākou ke helu i ke kaʻina hana leaching nitrate a hoʻomaopopo i ke ʻano o ka neʻe ʻana o ka nitrate ma ka lepo, ʻaʻole hiki ke hana ma mua," wahi a Andrews.
I ke kauwela o 2024, hoʻolālā ka poʻe noiʻi e kau i nā koʻokoʻo sensor 30 i ka lepo ma ka Hancock Agricultural Research Station a me ka Arlington Agricultural Research Station ma ke Kulanui o Wisconsin-Madison e hoʻāʻo hou i ka sensor.
Ka manawa hoʻouna: Jul-09-2024