Cov hlau hnyav yog ib pawg ntawm cov ntsiab lus uas suav nrog cov hlau thiab cov metalloids xws li arsenic, cadmium, chromium, cobalt, tooj liab, hlau, lead, manganese, mercury, nickel, tin thiab zinc. Cov hlau ions paub tias ua rau av, huab cua thiab dej paug thiab muaj tshuaj lom txawm tias nyob rau hauv qhov concentration tsawg heev.
Muaj ob qho tseem ceeb ntawm cov hlau hnyav hauv dej, cov khoom ntuj tsim thiab cov khoom neeg tsim. Cov khoom ntuj tsim suav nrog kev ua haujlwm ntawm roob hluav taws, kev puas tsuaj ntawm av, kev ua haujlwm ntawm lub cev, thiab kev puas tsuaj ntawm cov pob zeb thiab cov zaub mov, thaum cov khoom neeg tsim suav nrog cov chaw pov tseg, kev hlawv roj, dej ntws ntawm txoj kev, dej phwj tuaj, kev ua liaj ua teb, kev khawb av, thiab cov pa phem hauv kev lag luam xws li cov xim pleev ntaub. Cov hlau hnyav raug cais ua cov tshuaj lom thiab ua rau mob qog noj ntshav, lawv muaj peev xwm sib sau ua ke hauv cov nqaij thiab ua rau muaj kab mob thiab kev tsis zoo.
Kev tshem tawm cov hlau hnyav ions ntawm cov dej khib nyiab yog qhov tseem ceeb rau kev ntxuav ib puag ncig thiab kev noj qab haus huv ntawm tib neeg. Muaj ntau txoj kev tshaj tawm sib txawv uas mob siab rau kev tshem tawm cov hlau hnyav ions ntawm ntau qhov chaw dej khib nyiab. Cov txheej txheem no tuaj yeem faib ua adsorption, membrane, tshuaj lom neeg, electro, thiab photocatalytic based treatments.
Peb lub tuam txhab tuaj yeem muab tauTus Neeg Sawv Cev Tshem Tawm Hlau Hnyav, Tus Neeg Sawv Cev Tshem Tawm Hlau Hnyav CW-15 yog cov khoom siv uas tsis muaj tshuaj lom thiab tsis ua rau ib puag ncig puas tsuaj. Cov tshuaj no tuaj yeem tsim cov khoom sib xyaw ruaj khov nrog feem ntau cov hlau ions monovalent thiab divalent hauv cov dej khib nyiab, xws li: Fe2 +, Ni2 +, Pb2 +, Cu2 +, Ag +, Zn2 +, Cd2 +, Hg2 +, Ti + thiab Cr3 +, tom qab ntawd ua tiav lub hom phiaj ntawm kev tshem tawm cov hlau hnyav ntawm dej. Tom qab kho, nag tsis tuaj yeem yaj los ntawm nag, Tsis muaj teeb meem kev ua qias tuaj theem ob.
Cov txiaj ntsig yog raws li nram no:
1. Muaj kev nyab xeeb heev. Tsis muaj tshuaj lom, tsis muaj ntxhiab tsw phem, tsis muaj tshuaj lom tom qab kho.
2. Kev tshem tawm zoo. Nws tuaj yeem siv rau hauv ntau yam pH, tuaj yeem siv rau hauv cov dej khib nyiab uas muaj kua qaub lossis alkaline. Thaum cov hlau ions nyob ua ke, lawv tuaj yeem raug tshem tawm tib lub sijhawm. Thaum cov hlau ions hnyav nyob rau hauv daim ntawv ntawm cov ntsev sib xyaw (EDTA, tetramine thiab lwm yam) uas tsis tuaj yeem tshem tawm tag nrho los ntawm hydroxide precipitate txoj kev, cov khoom no tuaj yeem tshem tawm nws thiab. Thaum nws tso cov hlau hnyav, nws yuav tsis yooj yim thaiv los ntawm cov ntsev sib koom ua ke hauv cov dej khib nyiab.
3. Cov nyhuv flocculation zoo. Kev sib cais cov khoom khov thiab kua yooj yim.
4. Cov hlau hnyav ruaj khov, txawm tias ntawm 200-250 ℃ lossis dilute acid.
5. Txoj kev ua yooj yim, yooj yim sludge dewatering.
Yog tias koj xav paub ntxiv txog peb cov khoom, txais tos kom sab lajPeb tseem tab tom pab koj thaum lub caij nplooj ntoos hlav.
Lub sijhawm tshaj tawm: Lub Ib Hlis-18-2023