Daim ntawv thov ntawm Sodium Sulfide hauv Electroplating Wastewater Treatment

Introduction

Kev lag luam electroplating plays lub luag haujlwm tseem ceeb hauv kev lag luam niaj hnub. Ntau yam cuab yeej hauv peb lub neej niaj hnub yog electroplated, uas tsis yog tsuas yog txhim kho lawv cov kev zoo nkauj, tab sis kuj tseem cuam tshuam kev xeb thiab lwm yam teeb meem. Electroplating kev lag luam muaj ntau cov txheej txheem ntau lawm, uas ua rau muaj ntau hom kev tso dej pov tseg. Cov no suav nrog cov kua qaub thiab alkali ua ntej kho cov dej khib nyiab, cyanide-muaj cov dej khib nyiab los ntawm cyanide tooj liab plating, cov dej khib nyiab tooj liab, cov dej khib nyiab nickel, cov dej khib nyiab chromium, thiab lwm yam hnyav hlau khib nyiabs. Txhawm rau kho cov dej khib nyiab no, tus neeg sawv cev tshuaj sodium sulfide feem ntau yog siv. Kab lus no yuav tshawb txog cov txiaj ntsig ntawm sodium sulfide hauv kev kho electroplating dej khib nyiab.

Cov khoom ntawm Sodium Sulfide

Sodium sulfide, tseem hu ua tsw ntxhiab alkali, tsw ntxhiab dej qab zib, daj alkali, liab alkali, los yog sulfide alkali, yog ib qho inorganic compound. Nws muaj cov khoom muaj zog hygroscopic thiab soluble hauv dej. Nws cov tshuaj aqueous muaj zog alkaline thiab tuaj yeem ua rau kub hnyiab thaum nws los rau hauv kev sib cuag nrog cov tawv nqaij thiab plaub hau, yog li lub npe sulfide alkali.

Daim ntawv thov hauv Electroplating Wastewater Treatment

Sodium sulfide muaj txiaj ntsig zoo hauv kev kho ntau yam hlau tsis huv hauv electroplating dej khib nyiab. Nws tuaj yeem ua tsis tau tsuas yog tooj liab hauv electroplating dej khib nyiab tab sis kuj muaj kuab paug xws li chromium, zinc, lead, nickel, thiab cyanide. Thaum cuam tshuam nrog cov dej khib nyiab nyuaj, ib txoj hauv kev yog ntxiv ferrous sulfate los yog lwm yam tshuaj uas txo qis hauv acidic tej yam kev mob los rhuav tshem cov complex. Tom qab ntawd, kho cov pH rau alkaline thiab ntxiv sodium sulfide. Cov txheej txheem no tuaj yeem txo cov sodium sulfide siv thiab tiv thaiv kev tsim thiab tso tawm ntawm hydrogen sulfide gas nyob rau hauv acidic tej yam kev mob.

Rau cov dej khib nyiab dawb dawb, sodium sulfide tuaj yeem ncaj qha ntxiv rau kev kho mob. Txawm li cas los xij, rau cov dej khib nyiab hnyav hnyav, yuav tsum tau kho ua ntej kom tawg lub complex. Sodium sulfide hydrolyzes thiab reacts nrog complex hnyav hlau khib nyiab los tsim sulfide precipitates nrog tsawg solubility. Cov sulfide precipitates tsis yooj yim soluble txawm nyob rau hauv acidic tej yam kev mob. Yog li ntawd, siv sodium sulfide los kho cov khoom hnyav hlau khib nyiab muaj qhov zoo ntawm tus nqi qis thiab kev ruaj ntseg zoo.

Kev xav hauv kev siv Sodium Sulfide

Ib qho teeb meem tshwm sim hauv kev siv sodium sulfide yog qhov ntau npaum li cas. Yog tias qhov ntau npaum li cas tsawg dhau, qhov kev tshem tawm tooj liab tsis txaus siab. Yog tias qhov ntau npaum li cas, nws tuaj yeem ua rau lub cev dej tsaus thiab nce COD rau qee qhov, ua rau dej paug. Txhawm rau hais txog qhov no, ua ntej siv sodium sulfide, nws yuav tsum tau kho tus nqi pH ntawm cov dej kom nyob ib ncig ntawm 9. Tsis tas li ntawd, ua ib qho kev sim beaker ua ntej txhawm rau txiav txim siab npaum li cas yuav pab kom tsis txhob muaj kev kho mob tsis zoo lossis nce COD cov ntsiab lus hauv dej.

xaus

Sodium sulfide muaj kev kho mob zoo rau cov dej khib nyiab hlau hnyav los ntawm ntau yam kev lag luam xws li cov ntawv luam tawm, cov hlau smelting, electroplating, thiab dyeing. Txawm li cas los xij, thaum siv nws los kho cov dej khib nyiab electroplating, peb yuav tsum tau them sai sai rau qhov ntau npaum li cas thiab cov txheej txheem kho kom ua kom nws zoo tshaj plaws hauv kev kho cov dej khib nyiab thaum txo qhov cuam tshuam tsis zoo. Los ntawm kev ua tib zoo tswj cov xwm txheej no, sodium sulfide tuaj yeem yog cov cuab yeej tseem ceeb hauv kev kho cov dej khib nyiab electroplating, pab txhawb kev tiv thaiv ib puag ncig thiab kev txhim kho kom ruaj khov hauv kev lag luam electroplating.