Biochar tshem tawm Cyanide hauv Kub Mine Talings

Cyanide yog ib qho tshuaj lom tshaj plaws uas cov tuam txhab ua cov khoom siv hauv ntiaj teb siv dav hauv cov txheej txheem cyanidation los ntxuav cov khoom muaj nqis xws li kub thiab nyiaj. Vim nws muaj kev sib raug zoo rau kub thiab nyiaj, Cyanide tuaj yeem xaiv cov hlau no los ntawm cov pob zeb. Cyanide thiab cyanide complexes hauv cov dej khib nyiab raug tswj hwm nruj me ntsis. Cov seem thiab cov dej khib nyiab uas muaj cyanide yuav tsum tau kho kom txo qhov concentration ntawm tag nrho thiab dawb cyanide hauv qab cov kev txwv uas tau teev tseg.

Cov tshuaj tiv thaiv kev puas tsuaj ntuj tsim tuaj yeem ua rau cyanide tsis muaj tshuaj lom, tsim cov pa roj carbon dioxide thiab cov tshuaj nitrogen. Cov tshuaj tiv thaiv ntuj no yog txoj hauv kev siv ntau tshaj plaws hauv kev lag luam mining los txo cov cyanide. Txawm li cas los xij, qhov nrawm ntawm kev puas tsuaj ntuj tsim nyob ntawm cov xwm txheej ib puag ncig thiab tej zaum yuav tsis tsim cov dej phwj zoo thoob plaws hauv ib xyoos hauv txhua kis. Cov thev naus laus zis suav nrog cov tshuaj lom neeg, biological, electrochemical, thiab photochemical tau tsim los txo cov cyanide thiab nws cov complexes rau cov kev txwv tau teev tseg hauv cov dej khib nyiab.

Kub Mine Cyanide Tailings

Cov kua qaub mine kua los ntawm cov mining kub muaj cov hlau hnyav tab sis kuj cyanide, cov organic compound uas muaj peev xwm ua rau tuag taus. Cyanide yog siv nyob rau hauv ob txoj kev. Thawj yog heap leaching, qhov twg cov tshuaj cyanide yog sprayed mus rau pawg ntawm crushed ore. Qhov no dissolves kub, uas yog ces sau rau ntawm ib lub ncoo hauv qab no. Cov txheej txheem rov ua dua kom txog thaum tag nrho cov kub rov qab. Qhov thib ob txoj kev yog carbon - nyob rau hauv - pulp, qhov twg cyanide yog sprayed rau hauv leaching tso tsheb hlau luam uas muaj ore thiab sau nyob rau hauv ib tug ntau tswj.

Tailings tseem muaj tshuaj lom heev. Txawm hais tias cyanide decomposes sai sai hauv cov dej saum npoo av, nws tuaj yeem nyob hauv av rau lub sijhawm ntev. Cyanide tailings raug xwm txheej tau ua rau cov ntses loj heev tua, haus dej paug, thiab kev puas tsuaj rau thaj av ua liaj ua teb.

Biochar rau Hnyav Hlau thiab Cyanide Tshem Tawm

Ib txheej txheem tau tsim los siv cov nqi qis biochar ua los ntawm sawdust, yielding ib co txiaj ntsig kawg. Biochar yog charcoal tsim los ntawm pyrolysis lossis thermal decomposition ntawm biomass thaum tsis muaj oxygen. Nws muaj ntau yam kev siv, los ntawm kev txhim kho av fertility thiab kev ua liaj ua teb tsim tau rau carbon sequestration raws li ib tug ua tau txhais tau tias ntawm mitigating climate change.

Biochar tau pom tias txo cov concentration ntawm cyanide ions thiab lwm yam hlau hnyav hauv tailings khib nyiab. Cov khib nyiab sawdust, uas feem ntau yog pov tseg, muaj peev xwm tsim cov methane, cov pa hluav taws xob muaj zog, lossis ua rau hluav taws. Los ntawm kev siv cov pov tseg no los ntawm kev lag luam ntoo los ua kev daws teeb meem rau cov khib nyiab kub, qhov kev yeej zoo dua qub - yeej qhov xwm txheej tiav.

Cov kws tshawb fawb tau sim biochar nrog cov dej khib nyiab uas muaj cyanide, chromium, hlau, zinc, nickel, lead, manganese, thiab tooj liab. Cov pH tau khaws cia ntawm tus nqi tas li ntawm 7 los ntawm kev ntxiv carbon dioxide. Ib qho pH siab dua tau pom tias ua rau qeeb ntawm cov txheej txheem nqus. Cov txiaj ntsig tau qhia tias biochar, raws li bio- absorbent hauv kev kho dej, muaj qhov nruab nrab nqus ntawm 73%.

Qhov me me ntawm qhov loj me ntawm biochar, qhov ntau dua cov pa phem tshem tawm. Ib cheeb tsam loj dua ua rau muaj kev nqus ntau dua. Saturation, ntaus nqi rau clogging ntawm biochar pores thaum lub sij hawm bio-absorption txheej txheem, tau mus txog tom qab 14 teev.

Biochar muab ib qho kev daws teeb meem zoo thiab ruaj khov rau kev kho cov tailings ntawm cov qhov av kub , txo cov tshuaj lom cyanide thiab cov hlau hnyav, thiab muaj peev xwm hloov pauv txoj hauv kev uas kev lag luam mining tswj nws cov khib nyiab.