Iron pollution thiab kev kho mob:
Ob leeg Yang thiab Yin resins tej zaum yuav kis tau los ntawm hlau. Cov tsos mob ntawm cov kab mob sib kis yog xim av tsaus thiab tuaj yeem tig dub thaum mob hnyav. Feem ntau, thaum cov ntsiab lus hlau nyob rau hauv txhua 100g ntawm resin tshaj 150mg, nws yuav tsum tau kho. Lub xub ntiag ntawm hlau yuav ua kom lub degradation ntawm Yin resin.
Hauv kev siv cov resin zoo, feem ntau ntawm cov hlau ions coj los ntawm cov dej nyoos muaj nyob hauv Fe2+, thiab tom qab lawv nqus los ntawm cov resin, qee qhov ntawm lawv tau oxidized rau Fe3+, uas tuaj yeem tsis tau hloov pauv tag nrho los ntawm H + thaum lub sijhawm rov tsim dua tshiab, thiab yog li ntawd nyob hauv cov resin ua rau muaj kuab paug hlau. Thaum hlau ntsev yog siv los ua coagulant, ib feem ntawm cov paj alum tau coj mus rau hauv txaj Yang, thiab cov nyhuv pom ua rau nws tuaj yeem khaws cia rau saum npoo ntawm txheej txheej. Thaum lub sij hawm rov tsim dua tshiab, cov kua qaub dissolves cov paj alum, ua rau nws Fe3+, uas yog ib feem absorbed los ntawm Yang resin, ua rau hlau muaj kuab paug. Ib tug loj npaum li cas ntawm Fe3+ nyob rau hauv industrial hydrochloric acid kuj yuav ua rau hlau muaj kuab paug rau cov resin. Cov resins zoo siv rau kev sib pauv sodium ion yog qhov cuam tshuam rau cov kab mob hlau.
Cov ntsiab lus hlau ntawm cov khoom tsis zoo yog qee zaum ntau zaus ntau dua li cov khoom zoo. Cov hlau ntawm Yin resin feem ntau yog los ntawm cov kua regenerated. Lub caustic soda tsim los ntawm txoj kev diaphragm muaj {{0}}.01% ~ 0.03% Fe2O3, thiab tib lub sijhawm, nws kuj muaj 6 ~ 7mg / L NaClO3. Xws li caustic soda yuav tsim ferrate (FeO4) nyob rau hauv kev sib cuag nrog hlau ntim thiab pipelines (tsis muaj anti-corrosion txheej) thaum lub sij hawm cia thiab thauj. Tom qab ferrate nkag mus rau hauv Yin txaj nrog lye, nws yuav decompose vim qhov txo qis ntawm pH tus nqi, thiab cov tshuaj tiv thaiv mis yog raws li nram no:
2FeO42- + 10H+ → 2Fe3+ + 2/3 O2 + 5 H2O
Fe3+ ntxiv tsim Fe(OH)3, uas ua raws li cov khoom tsis zoo, ua rau muaj kuab paug hlau.
Tom qab cov resin kis kab mob nrog hlau, nws tsis tuaj yeem raug tshem tawm hauv cov txheej txheem tsim dua tshiab thiab yuav tsum tau ntxuav nrog hydrochloric acid.
Txoj kev siv tu feem ntau yog siv 10% HCl tov, ua ntej ua cov txheej txheem no, cov khoom siv tiv thaiv corrosion yuav tsum raug kuaj xyuas, txwv tsis pub hydrochloric acid nrog inhibitor yuav tsum tau siv.
