E aʻo i ka mālama ʻana i ka wai ʻakika keleawe-arsenic me ka sodium hydrosulfide ma kahi o ka sodium sulfide

Introduction

Hōʻike ka noiʻi ʻana i ka mālama ʻana i ke keleawe a me ka arsenic-containing waste acid i kahi kaʻina e pili ana i ka ua sulfide, a ukali ʻia e ka hoʻohui gypsum a me ka neutralization electrochemical, e alakaʻi ana i ka hoʻokuʻu paʻa i kū i nā kūlana hoʻoponopono. I ka pae ua sulfide, a sodium sulfide Hoʻohui ʻia ka hopena me ka nui o 26% i ke keleawe a me ka arsenic-containing waste acid ma lalo o nā kūlana acidity kikoʻī, ka hopena i ka hoʻokumu ʻana o CuS a me As2S3 precipitates e wehe i ke keleawe a me nā ion arsenic mai ka pae wai. I ka hana maoli ʻana, loaʻa i ka solution sodium sulfide nā pae kiʻekiʻe o nā haumia hiki ʻole ke hoʻoheheʻe ʻia, a ke ʻike ʻia i ka ea, hoʻoneʻe mālie ia e hana i ka thiosulfate. Eia kekahi, he kiʻekiʻe ka crystallization wela, i waena o nā drawbacks ʻē aʻe. No laila, ʻo ka loaʻa ʻana o kahi mea hana sulfide hou e pani ai i ka sodium sulfide he mea nui loa ia.

Paʻa Sodium Hydrosulfide

Kaʻina Hana

Kāohi ʻia e ke kaʻina hana hoʻoheheʻe H2S i kēia manawa, ka mālama ʻana i ke keleawe a me ka arsenic-containing waste acid me ka hoʻohana ʻana. ʻO ka sodium hydrosulfide ke alakaʻi ʻia nei ma muli o nā mea hana o kēia manawa a me ke kaʻina hana o ka ʻakika ʻōpala a me ka wai ʻōpala o ka hale hana sulfuric acid. Hoʻohana kēia ʻano hana i kahi hopena hui ʻia o ka sodium hydrosulfide a me ka sodium sulfide no ka mālama ʻana.

Ka Hoʻomaeka Hana

Hōʻike ka Kiʻi 1 i ke kiʻikuhi kaʻina hana no ka mālama ʻana i ke keleawe a me ka arsenic-containing waste acid me ka hoʻohana ʻana i ka sodium hydrosulfide. ʻO ka solution acid acid, ma hope o ka wehe ʻia ʻana o SO2 i loko o ka hale kiaʻi wehe ʻia, komo i ka pahu hopena sodium hydrosulfide mai luna. Hoʻohui ʻia kahi hopena hui ʻia o ka sodium hydrosulfide a me ka sodium sulfide mai ka lalo o ka pahu hopena. Ma lalo o nā kūlana acidic, hoʻokumu ʻia ke kinoea H2S a piʻi mālie, e pane ana me ke keleawe a me ka arsenic mai luna a hiki i ka hana ʻana o CuS a me As2S3 precipitates. A laila e kahe ana kēia mau ʻeke i loko o ka mānoanoa keleawe no ka hoʻomoe. Hoʻouna ʻia ka supernatant i ke kaʻina hana gypsum, ʻoiai ʻo ka lepo lalo e hoʻoheheʻe ʻia i loko o kahi kaomi kānana ma mua o ka hoʻouna ʻia ʻana no ka hana hou. Hoʻokuʻu ʻia kahi hapa liʻiliʻi o ka H2S i hoʻokō ʻole ʻia e kahi paipu kaomi maikaʻi ʻole i ka hale kiaʻi detoxification, kahi i hoʻomoʻa ʻia e ka hoʻoheheʻe hui ʻia o ka sodium hydrosulfide a me ka sodium sulfide, e hōʻoiaʻiʻo ana e hoʻokō i nā kūlana hoʻokuʻu.

Nā hana hoʻokolohua

Hoʻohana ʻia kahi ʻano hana hoʻomau, me nā kaʻina hana ʻē aʻe a me nā ʻāpana hoʻomalu e waiho ʻole ʻia. ʻOi aku ka wikiwiki o ka sodium hydrosulfide ma mua o ka sodium sulfide; inā ʻoi aku ka kiʻekiʻe o ka neʻe ʻana, hana wikiwiki ʻia ka nui o ka hydrogen sulfide (H2S) ma lalo o nā kūlana acidic. Ma waho aʻe o ka hana ʻana me kekahi o ke keleawe a me ka arsenic i loko o ka ʻakika ʻōpala, e pakele ka hydrogen sulfide i ka ʻili wai ma muli o ka hoʻoulu ʻana o ka hoe hoʻōho a huki ʻia e ke kaomi ʻino i ka hale kiaʻi detoxification. Ke hoʻohana nei ke kaʻina hana i ka sodium sulfide no ka hoʻomoʻa ʻana i ka hydrogen sulfide keu i hana ʻia ma ka hopena sulfide (Na2S + H2S = 2NaHS). Ma hope o ka hoʻāʻo ʻana i ka sodium hydrosulfide, aia ka sodium hydrosulfide i loko o ka pahu mālama sodium sulfide, kahi e hōʻemi ai i kona hiki ke komo i ka hydrogen sulfide. No ka pale ʻana i ka absorption piha ʻole o ka hydrogen sulfide, hiki ke alakaʻi i ka hoʻokuʻu ʻole ʻia mai ka hale kiaʻi detoxification, hoʻohui ʻia ka wai (condensate mai ka mahu hoʻomehana o ka pahu mālama sodium sulfide) i ka pahu mālama sodium sulfide i ka wā hoʻokolokolo e mālama i ka neʻe ʻana o ka hopena hui ʻia o ka sodium sulfide a me ka sodium hydrosulfide ma kahi o 15%.

Panina

1. Ma hope o ka hoʻohana ʻana i ka hopena hui ʻia o ka sodium hydrosulfide a me ka sodium sulfide, ua hoʻemi ʻia ke kumukūʻai reagent no ka mālama ʻana i hoʻokahi mika cubic o ka ʻōpala ʻōpala i 52.5% o ka sodium sulfide maʻemaʻe, e hopena i nā pono waiwai nui.

2. ʻO ka hoʻohana ʻana i ka hopena hui ʻia o ka sodium hydrosulfide a me ka sodium sulfide ʻaʻole i hoʻopilikia i nā hōʻailona hoʻokuʻu o ka hale hana; paʻa a kūpaʻa nā kūlana hoʻokuʻu wai ʻino.

3. Ma muli o ka hoʻohana ʻana o ka sodium sulfide a me ka sodium hydrosulfide, a me ka hoʻololi ʻole o ka hale kiaʻi detoxification i kēia manawa, ʻaʻohe manawa o ka hoʻokō ʻole ʻana i nā hoʻokuʻu mai ka hale kiaʻi detoxification.