Mai ka Sodium Cyanide i ka Hydrogen Cyanide: Ke ʻimi nei i nā noi a me ka hoʻololi

ʻO nā Cyanide, me ka Sodium Cyanide (NaCN) a me ka Hydrogen Cyanide (HCN), kekahi o nā hui kemika ʻawahia loa akā koʻikoʻi i ka ʻoihana. ʻO kā lākou hana kū hoʻokahi e hiki ai ke hoʻohana i ka hana ʻeli gula, nā lāʻau lapaʻau, nā plastics, a me nā mea hou aku. Ke nānā nei kēia ʻatikala i nā waiwai, nā noi, a me nā hoʻololi kemika ma waena o kēia mau cyanide koʻikoʻi ʻelua , ʻoiai e kamaʻilio ana i nā pilikia palekana a me nā hana hou ʻenehana.

I. Na waiwai a me na hoohana ana o Sodium Cyanide

1. Nā Pono Kemika

He mea paʻa kristal keʻokeʻo ka sodium cyanide , hiki ke hoʻoheheʻe ʻia i ka wai. Loaʻa kona ʻawahia mai ka ion cyanide (CN⁻), ka mea e kāohi ai i ka hanu ʻana o ke kelepona ma o ka hoʻopaʻa ʻana i ka cytochrome oxidase.

2. Hoohana Hana Hana

• Ka Hoʻokaʻawale ʻana i ke Gula : E like me ka mea i kūkākūkā ʻia ma mua, hoʻoheheʻe ʻo NaCN i ke gula ma o ka hopena:

4Au + 8NaCN + O₂ + 2H₂O → 4NaAu(CN)₂ + 4NaOH

• Ka hoʻopili uila ʻana : Hoʻopaʻa i nā iona metala i loko o nā uhi (e laʻa, zinc, keleawe).

• Hana ʻOkanika : Precursor no nā nitriles, adiponitrile (nylon), a me nā lāʻau lapaʻau.

• Nā Pesticides : Hoʻohana ʻia i nā insecticides e like me fenvalerate.

II. Hydrogen Cyanide: Nā Pono a me nā Hoʻohana

1. Nā Pono Kemika

ʻO ka hydrogen cyanide he wai waihoʻoluʻu/gasua me ka ʻala ʻalemona ʻawaʻawa. ʻAʻole hiki ke hoʻopaʻa ʻia a komo koke ʻia ma o ka inhalation a i ʻole ka ʻili.

2. Hoohana Hana Hana

• Nā lāʻau lapaʻau : Hana ʻana i nā huaora (e laʻa, B12), nā lāʻau antithyroid.

• Nā Palakiko : Hana ʻana o ka acrylonitrile (hoʻohana ʻia i nā palakiko ABS a me nā olonā synthetic).

• Mahiʻai : Fumigant no nā palaoa i mālama ʻia a me ka sterilization o ka lepo.

• Kaua Kemika : Hoʻohana mōʻaukala ma ke ʻano he mea kaua, i kēia manawa ua hoʻoponopono paʻa ʻia.

III. Nā Mechanism Hoʻololi ma waena o NaCN a me HCN

1. Mai NaCN a i HCN

Ma lalo o nā kūlana waikawa (pH <7), hoʻokuʻu ʻo NaCN i ke kinoea HCN:

NaCN + HCl → NaCl + HCN↑

He mea koʻikoʻi kēia pane i ka ʻeli gula; ʻAʻole lawa ka alkalinity (e laʻa, ka hoʻohui CaO haʻahaʻa) hiki ke alakaʻi i nā leaka kinoea HCN, e hōʻeha ana i nā pilikia palekana.

2. Mai HCN a i NaCN

Hiki ke hoʻokaʻawale ʻia ka HCN me nā kumu ikaika e hana hou i nā paʻakai cyanide:

HCN + NaOH → NaCN + H₂O

Hoʻohana ʻia kēia kaʻina hana i nā ʻōpala kinoea no ka mālama ʻana i nā kahawai hoʻopau i loko o ka HCN.

3. Oxidation and Degradation

Hiki ke hoʻokaʻawale ʻia ʻo NaCN a me HCN ma o ka oxidation:

• Ka hoʻokalo ʻana :

2CN⁻ + 5ClO⁻ + H₂O → 2CO₂↑ + N₂↑ + 5Cl⁻ + 2OH⁻

• ʻOzonation :

CN⁻ + O₃ → CNO⁻ + O₂

IV. Nā pilikia palekana a me nā mana hoʻoponopono

1. Pilikia a me ke Kaiapuni

• Ola Kino Kanaka : ʻO ka hanu ʻana i ka HCN (ka nui make: ~50–200 mg) ke kumu o ka nalowale koke o ka ʻike a me ka make.

• Ka Hopena o ke Kaiapuni : Hiki i ka haumia ʻana o ka cyanide i loko o nā kahawai ke pepehi i ke ola wai; ʻo nā ninini ʻana o ka mōʻaukala (e like me ka pōʻino Baia Mare 2000) e hōʻike ana i nā pilikia.

2. Nā ana hoʻoponopono

• Hoʻokaʻawale ʻana o UN : He kemika Papa 3 ʻo HCN ma lalo o ka ʻAha Kūkākūkā no nā Mea Kaua Kemika.

• Nā Palena OSHA : Ka palena hōʻike ʻae ʻia (PEL) no HCN: 10 ppm (8-hola TWA).

• Nā Alakaʻi ICMI : Kauoha ke Kānāwai Hoʻokele Cyanide International i ka lawelawe palekana i ka hana ʻeli ʻana.

V. Nā mea hou i ka hoʻokele Cyanide

1. Nā Kaʻina Hana Hana Palekana

• Hanana Ma Ka Pūnaewele : Hoʻonui ʻia ka hana ʻana o HCN ma o ka ammoxidation i kāohi ʻia o ka methane (e laʻa, CH₄ + NH₃ + 1.5O₂ → HCN + 3H₂O ), e hōʻemi ana i nā pilikia o ka halihali.

• Nā Koho ʻē aʻe me ka ʻole o ka Cyanide :

• Ka Hoʻokaʻawale ʻana i ke Gula : Thiourea, bromine, a i ʻole nā ​​​​wai ionic.

• Electroplating : Nā hui zinc-nickel me ka ʻole o ka cyanide.

2. Nānā Kikohoʻe

Hiki i nā mea naʻau IoT a me nā algorithms AI ke hoʻopaʻa manawa maoli i nā ʻano cyanide i ka ea a me ka wai, e hōʻemi ana i nā leaks.

VI. Nā loina e hiki mai ana

• Hana ʻōmaʻomaʻo : Hana ʻana o nā nitriles me ka hoʻohana ʻana i nā enzymes (e laʻa, nitrile hydratase).

• Nā Hoʻohana Ikehu : HCN ma ke ʻano he mea lawe hydrogen i loko o nā cell wahie.

• Hoʻokele Waiwai Pōʻai : Hoʻihoʻi ʻia o ka cyanide mai nā kahawai ʻōpala ma o ka kānana membrane a i ʻole ka adsorption.

Panina

ʻO ka pilina ma waena o ka sodium cyanide a me ka hydrogen cyanide e hōʻike ana i kā lāua kuleana pālua ma ke ʻano he mau lio hana ʻoihana a me nā pōʻino o ke kaiapuni. ʻOiai ʻo kā lākou noi e pono ai i nā ʻāpana e like me ka mining a me nā lāʻau lapaʻau, ʻo ka holomua ʻenehana a me ka paʻakikī o nā hoʻoponopono e hoʻokele nei i nā hana palekana. Aia ka wā e hiki mai ana o ka kemika cyanide i ke kaulike ʻana i ka pono me ka hoʻomau ʻana, e hōʻoia ana e lawelawe kēia mau hui ikaika i ke kanaka me ka ʻole o ka hoʻopilikia ʻana i ke olakino a i ʻole ka honua.