Qhov sib txawv ntawm polyferric sulfate thiab ferrous sulfate

Qhov sib txawv tseem ceeb ntawm ferrous sulfate thiab polymeric ferric sulfate yog pom tseeb hauv cov khoom siv tshuaj lom neeg, cov teebmeem kev kho mob, cov xwm txheej siv thiab kev hloov pauv ib puag ncig, raws li hauv qab no:

I. Cov khoom siv tshuaj lom neeg thiab cov qauv

1. Cov mis tshuaj thiab cov hlau ion valence xeev

● Ferrous sulfate: cov mis tshuaj yog FeSO₄·7H₂O, hlau yog divalent (Fe²⁺), koom nrog cov tshuaj inorganic uas tsis muaj molecular. Nws muaj cov khoom txo qis thiab tuaj yeem cuam tshuam nrog chromium hexavalent thiab lwm yam pa phem los ntawm REDOX reaction.
● Polyferric sulfateCov mis tshuaj yog [Fe₂(OH)ₙ(SO₄)₃-ₙ/₂]ₘ, nrog hlau nyob rau hauv lub xeev trivalent (Fe³⁺), nws yog cov inorganic polymers. Tom qab hydrolysis, nws tsim cov multinuclear complexes (xws li [Fe₂(OH)₄]²⁺), uas tshem tawm cov pa phem los ntawm kev nqus thiab electro-neutralization.

2. khoom vaj khoom tsev

● Ferrous sulfate: xim ntsuab daj los yog xim daj crystalline khov kho, yooj yim deliquesce, cov kua yog xim ntsuab daj; nws yuav tsum nyob rau hauv me ntsis alkaline (pH 8-10) tej yam kev mob kom ua tiav qhov zoo tshaj plaws.
● Polyferric sulfate: xim av daj lossis xim av liab hmoov/kua, solubility tsawg, tab sis pH ntau yam kev hloov pauv (4-11), tshwj xeeb tshaj yog haum rau qhov kub qis, dej turbidity siab.

II. Cov teb thov thiab cov teebmeem ua tiav

1.ferrisulfas

● Cov yam ntxwv ua haujlwm:
● Nws muaj ob qho tib si txo cov khoom (xws li txo hexavalent chromium rau trivalent chromium), coagulation khoom thiab decolorization khoom.
     ● Cov nyhuv tshem xim muaj zog heev, thiab cov dej khib nyiab ntawm cov xim reactive yuav luag tsis muaj xim tom qab kho.
● daim ntawv thov tseem ceeb:
● Cov dej khib nyiab electroplating (kho nrog cov hlau hnyav xws li chromium thiab tooj liab).
● Kev ua liaj ua teb (ntxiv hlau), tshuaj tua kab mob hauv kev lag luam.

2.Polyferric sulfate

● Cov yam ntxwv ua haujlwm:
● Tus nqi tshem tawm ntawm COD thiab BOD yog 80% thiab 93% feem los ntawm kev nqus thiab kev ntes ntawm ntau lub zog nuclear.
● Qhov ua rau cov xim tsis zoo me ntsis dua li ntawm ferrous sulfate (94% -98% piv rau yuav luag tsis muaj xim), tab sis nws ua haujlwm tau zoo dua rau kev tshem tawm COD.
● daim ntawv thov tseem ceeb:
● Kev lim dej, Cov Dej Pov Tseg Hauv Kev Lag Luam (dyeing, paper making, electroplating, thiab lwm yam), sludge dewatering.
● Kub tsawg los yog turbidity siab Kev Kho Dej.

Tus nqi thiab kev cuam tshuam rau ib puag ncig

● Ferrous sulfate: pheej yig, tab sis yooj yim rau oxidize thiab ua tsis tau. Siv ntau dhau yuav ua rau muaj cov hlau ions seem hauv dej, uas yuav ua rau muaj kuab paug thib ob.
● Polyferric sulfate: qhov koob tshuaj tsuas yog 20% ​​-50% ntawm ferrous sulfate, tsawg dua sludge thiab yooj yim dua rau dehydrate, tsis muaj txhuas thiab chlorine residue, kev tiv thaiv ib puag ncig zoo dua.

Lwm yam sib txawv

sau ua ke

Ferrous sulfate yog qhov tsim nyog rau kev kho mob ntawm kev txo cov pa phem (xws li hexavalent chromium) thiab cov xwm txheej pheej yig, thaum polymeric ferric sulfate muaj txiaj ntsig zoo dua thiab zoo rau ib puag ncig, tsim nyog rau kev ntxuav dej nyuaj. Qhov kev xaiv tiag tiag yuav tsum tau ua ke nrog hom pa phem, kev kho mob xav tau thiab cov peev nyiaj siv.