Kev sib piv ntawm kev kho cov teebmeem ntawm electroplated sodium hydroxide thiab nano FeS sol ntawm hluav taws xob cua sov raj

Kev sib piv ntawm kev kho cov teebmeem ntawm electroplated sodium hydroxide thiab nano FeS sol ntawm hluav taws xob cua sov raj

Raws li lub sij hawm cov tshuaj tiv thaiv nce, cov residual concentration ntawm hnyav hlau ions txo. Ntawm lawv, Cr (VI) cuam tshuam zoo heev los ntawm lub sijhawm tshuaj tiv thaiv, feem ntau yog vim qhov qeeb qeeb ntawm cov tshuaj tiv thaiv redox. Tom qab lub sij hawm cov tshuaj tiv thaiv mus txog 10 feeb, cov seem Cr (VI), Cu2 ntxiv, thiab Ni2 ntxiv rau hauv cov dej khib nyiab kho tau raws li cov kev cai ntawm lub teb chaws electroplating wastewater paug tus qauv. Yog li, lub sijhawm zoo tshaj plaws rau kev kho cov dej khib nyiab electroplating uas muaj Cr (VI), Cu2 ntxiv, thiab Ni2 ntxiv nrog nano FeS sol yog 10-15 feeb.

2.4 Kev sib piv ntawm kev kho cov teebmeem ntawm sodium hydroxide thiab nano FeS sol

Sodium hydroxide method: Siv 200 mL ntawm simulated dej khib nyiab rau hauv 250 mL beaker, kho cov pH rau 2-3 nrog 1.0 mol / L sulfuric acid tov, ntxiv sodium metabisulfite (txo tus neeg sawv cev), kom txog thaum ORP yog 250-300 mV, thiab txo Cr (VI) rau Cr (III); Kho cov pH mus rau 8.0 nrog 2.0 mol / L NaOH tov, ntxiv 1 mL ntawm 0.5 feem pua ​​PAM tov, cia sawv ntsug rau 5 feeb, lim nrog cov ntawv lim, thiab ntsuas qhov concentration ntawm hlau ions nyob rau hauv lub filtrate.

Nano FeS sol method: noj 200 mL ntawm simulated dej khib nyiab rau hauv 250 mL beaker, kho cov pH rau 4.0, ntxiv 3.{{13 } } g/L 10 feem pua ​​nano FeS sol, thiab muab tso rau ntawm ib tug sib nqus stirrer do rau 15 feeb; Kho cov pH mus rau 8.0 nrog 2.0mol / L NaOH tov, ntxiv 1 mL ntawm 0.5 feem pua ​​PAM tov, cia sawv ntsug rau 5 feeb, lim nrog cov ntawv lim, thiab ntsuas qhov concentration ntawm hlau ions hauv cov lim.

Cov residual concentration ntawm hnyav hlau ions txo. Ntawm lawv, Cr (VI) cuam tshuam zoo heev los ntawm lub sijhawm tshuaj tiv thaiv, feem ntau yog vim qhov qeeb qeeb ntawm cov tshuaj tiv thaiv redox. Tom qab lub sij hawm cov tshuaj tiv thaiv mus txog 10 feeb, cov seem Cr (VI), Cu2 ntxiv, thiab Ni2 ntxiv rau hauv cov dej khib nyiab kho tau raws li cov kev cai ntawm lub teb chaws electroplating wastewater paug tus qauv.

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