Cov hlau hnyav yog ib pawg ntawm cov kab ntawv uas muaj cov hlau thiab metalloids xws li arsenic, cadrium, mangury, mercur, tin thiab zinc. Ix ions yog paub txog cov av, cov cua thiab cov dej thiab cov tshuaj lom thiab muaj kuab heev.
Muaj ob lub tseem ceeb ntawm cov hlau hnyav hlau hauv dej, cov chaw ua si thiab cov khoom siv anthropogenic. Cov khoom ntuj muaj xws li cov kev ua haujlwm volcanic, cov khoom siv roj ntsha, cov dej phwj tuaj, thiab muaj kuab paug, thiab muaj cov qias neeg xws li textile dyes. Cov hlau hnyav tau muab cais ua cov tshuaj lom thiab carcinogenic, lawv muaj peev xwm ua kom muaj kab mob thiab ua rau muaj kab mob thiab tsis sib haum.
Kev tshem tawm cov hlau hnyav hnyav los ntawm cov dej khib nyiab yog qhov tseem ceeb rau kev ntxuav ib puag ncig thiab tib neeg kev noj qab haus huv. Muaj cov txheej txheem sib txawv raws li kev tshem tawm ntawm cov hlau hnyav ions los ntawm ntau yam dej lwg. Cov hau kev no tuaj yeem raug cais rau kev kos npe, membrane, tshuaj lom neeg, thiab photocatalytic raws li kev kho mob.
Peb lub tuam txhab tuaj yeem muabHnyav Hlau Tshem Tawm Tus Neeg Sawv Cev, Hnyav hlau tshem tawm tus neeg sawv cev CW-15 yog qhov tsis muaj tshuaj lom thiab ib puag ncig-tus phooj ywg hnyav hlau catcher. Cov tshuaj no tuaj yeem tsim cov chaw ruaj khov nrog feem ntau cov poj niam uas muaj kev khib nyiab thiab cov lus qhia, los ntawm dej. Tom qab kho, cov nag lossis daus tsis tuaj yeem yaj los ntawm cov nag, tsis muaj teeb meem muaj kuab paug kom muaj kuab paug.
Qhov zoo yog raws li nram no:
1. Kev nyab xeeb siab. Tsis yog- lom, tsis muaj ntxhiab tsw phem, tsis muaj tshuaj lom cov khoom siv tom qab kev kho mob.
2. Kev tshem tawm cov nyhuv zoo. Nws tuaj yeem siv rau hauv ntau ntau ntau, tuaj yeem siv hauv cov kua qaub lossis alkaline quav dej. Thaum hlau ions coexist, lawv tuaj yeem raug tshem tawm tib lub sijhawm. Thaum cov hlau hnyav yog nyob rau hauv daim ntawv ntawm cov khoom ntsev uas yog hydroxide etc) uas tsis tuaj yeem tshem tawm nws ib yam nkaus. Thaum nws sediment tus hlau hnyav, nws yuav tsis yooj yim pom los ntawm coexisted salts hauv dej khib.
3. Cov txiaj ntsig flocculation zoo. Khoom-kua sib cais tau yooj yim.
4.Yavy hlau sediments yog ruaj khov, txawm nyob ntawm 200-250 ℃ lossis dilute acid.
5. Cov txheej txheem yooj yim, yooj yim sludge dewatering.
Yog tias koj txaus siab rau peb cov khoom, Txais Tos Mus Sab LajCov. Peb tseem ua hauj lwm rau koj thaum lub caij nplooj ntoo hlav.
Lub Sijhawm Post: Jan-18-2023