ʻO nā metala kaumaha he hui o nā mea trace e komo pū ana me nā metala a me nā metalloids e like me ka arsenic, cadmium, chromium, cobalt, keleawe, hao, kēpau, manganese, mercury, nickel, tin a me ka zinc. Ua ʻike ʻia nā ion metala e hoʻohaumia i ka lepo, ka lewa a me nā ʻōnaehana wai a he mea ʻawahia ʻoiai ma nā ʻano haʻahaʻa loa.
ʻElua kumu nui o nā metala kaumaha i loko o ka wai, nā kumu kūlohelohe a me nā kumu anthropogenic. ʻO nā kumu kūlohelohe e komo pū me ka hana pele, ka ʻinoʻino o ka lepo, ka hana olaola, a me ka palaho ʻana o nā pōhaku a me nā minelala, ʻoiai ʻo nā kumu anthropogenic e komo pū me nā landfills, ka puhi ʻana i ka wahie, ka wai kahe o ke alanui, ka wai ʻino, nā hana mahiʻai, ka hana ʻeli ʻana, a me nā mea haumia ʻoihana e like me nā kala lole. Hoʻokaʻawale ʻia nā metala kaumaha he mea ʻawahia a me ka carcinogenic, hiki iā lākou ke hōʻiliʻili i loko o nā ʻiʻo a hoʻoulu i nā maʻi a me nā maʻi.
He mea nui ka wehe ʻana i nā ion metala kaumaha mai ka wai hoʻoneoneo no ka hoʻomaʻemaʻe ʻana i ke kaiapuni a me ke olakino kanaka. Aia nā ʻano hana like ʻole i hōʻike ʻia no ka wehe ʻana i nā ion metala kaumaha mai nā kumu wai hoʻoneoneo like ʻole. Hiki ke hoʻokaʻawale ʻia kēia mau ʻano hana i nā ʻano hana adsorption, membrane, chemical, electro, a me photocatalytic.
Hiki i kā mākou hui ke hoʻolakoLuna Wehe Metala Kaumaha, ʻO ka Heavy Metal Remove Agent CW-15 kahi mea hopu metala kaumaha ʻaʻole ʻawahia a aloha i ke kaiapuni. Hiki i kēia kemika ke hana i kahi hui paʻa me ka hapa nui o nā ion metala monovalent a me divalent i loko o ka wai ʻōpala, e like me: Fe2+, Ni2+, Pb2+, Cu2+, Ag+, Zn2+, Cd2+, Hg2+, Ti+ a me Cr3+, a laila hiki i ke kumu o ka wehe ʻana i ka naʻau kaumaha mai ka wai. Ma hope o ka mālama ʻana, ʻaʻole hiki ke hoʻoheheʻe ʻia ka Precipitation e ka ua, ʻAʻohe pilikia haumia lua.
Eia nā pono:
1. Palekana kiʻekiʻe. ʻAʻohe mea ʻawahia, ʻaʻohe ʻala ʻino, ʻaʻohe mea ʻawahia i hana ʻia ma hope o ka mālama ʻana.
2. Ka hopena wehe maikaʻi. Hiki ke hoʻohana ʻia ma ka pae pH ākea, hiki ke hoʻohana ʻia i loko o ka wai hoʻoneoneo waikawa a alkaline paha. Ke hui pū nā ion metala, hiki ke wehe ʻia i ka manawa like. Ke ʻano o ka paʻakai paʻakikī nā ion metala kaumaha (EDTA, tetramine etc) ʻaʻole hiki ke wehe loa ʻia e ke ʻano hydroxide precipitate, hiki i kēia huahana ke wehe pū. Ke hoʻomoe ʻia ka metala kaumaha, ʻaʻole ia e ālai maʻalahi ʻia e nā paʻakai i hui pū ʻia i loko o ka wai hoʻoneoneo.
3. Ka hopena flocculation maikaʻi. Hoʻokaʻawale maʻalahi i ka wai-paʻa.
4. Paʻa nā metala kaumaha, ʻoiai ma 200-250 ℃ a i ʻole ka waikawa hoʻoheheʻe ʻia.
5. ʻAno hana maʻalahi, hoʻomaʻemaʻe maʻalahi i ka sludge.
Inā makemake ʻoe i kā mākou huahana, e ʻoluʻolu e kūkākūkāKe lawelawe mau nei mākou iā ʻoe i ka wā o ka ʻAhaʻaina Puna.
Ka manawa hoʻouna: Ian-18-2023