Electrodialysis (ED) bụ usoro nke na-eji akpụkpọ ahụ semipermeable na ọkụ eletrik kpọmkwem iji buru ihe ndị na-agbaze agbaze (dị ka ion) site na mmiri. Usoro nkewa a na-etinye uche, na-agbaze, na-eme ka ngwọta dị ọcha site n'iduzi ihe ndị na-agbaze agbaze pụọ na mmiri na ihe ndị ọzọ na-anaghị agbaze agbaze. Electrodialysis agbanweela ka ọ bụrụ nnukwu ọrụ nkewa kemịkalụ ma na-arụ ọrụ dị mkpa na teknụzụ nkewa membrane. Ọ na-achọta ọtụtụ ọrụ na ụlọ ọrụ dịka nhicha kemịkalụ, ịsacha mmiri mmiri, nri na ọgwụ, na ọgwụgwọ mmiri mkpofu. N'ebe ụfọdụ, ọ ghọwo ụzọ bụ isi maka imepụta mmiri ọṅụṅụ. Ọ na-enye uru dị ka obere oriri ike, uru akụ na ụba dị ukwuu, ọgwụgwọ dị mfe, akụrụngwa na-adịgide adịgide, nhazi sistemụ na-agbanwe agbanwe, ọrụ dị mfe na mmezi, usoro dị ọcha, obere oriri kemịkalụ, obere mmetọ gburugburu ebe obibi, ogologo ndụ ngwaọrụ, na oke mgbake mmiri dị elu (na-abụkarị site na 65% ruo 80%).
Usoro electrodialysis ndị a na-ejikarị eme ihe gụnyere electroionization (EDI), electrodialysis reversal (EDR), electrodialysis na mmiri mmiri (EDLM), electrodialysis okpomọkụ dị elu, electrodialysis ụdị roll-type, bipolar membrane electrodialysis, na ndị ọzọ.
Enwere ike iji electrodialysis gwọọ ụdị mmiri mkpofu dị iche iche, gụnyere electroplating mmiri mkpofu na mmiri mkpofu dị arọ nke metọrọ site na ígwè. Enwere ike iji ya wepụta ion ígwè na ihe ndị ọzọ site na mmiri mkpofu, na-enye ohere maka mgbake na iji mmiri na akụrụngwa bara uru eme ihe ebe ọ na-ebelata mmetọ na mwepụta. Ọmụmụ ihe egosila na electrodialysis nwere ike weghachite ọla kọpa, zinc, na ọbụna oxidize Cr3+ ruo Cr6+ n'oge ọgwụgwọ nke ngwọta passivation na usoro mmepụta ọla kọpa. Na mgbakwunye, ejikọtara electrodialysis na mgbanwe ion maka mgbake nke ọla dị arọ na asịd site na mmiri mkpofu acid pickling na ngwa ụlọ ọrụ mmepụta ihe. Ejirila ngwaọrụ electrodialysis emepụtara nke ọma, na-eji anion na cation exchange resins dị ka ihe na-ejupụta, iji gwọọ mmiri mkpofu ígwè dị arọ, na-enweta imegharị ihe mechiri emechi na enweghị mwepụ. Enwere ike itinye electrodialysis iji gwọọ mmiri mkpofu alkaline na mmiri mkpofu organic.
Nnyocha e mere na State Key Laboratory of Pollution Control and Resource Reuse na China mere nchọcha maka ọgwụgwọ nke mmiri mkpofu ịsa alkali nwere epoxy propane chlorination gas ọdụ ya site na iji electrolysis ion exchange membrane. Mgbe voltaji electrolysis dị 5.0V ma oge mgbasa ahụ bụ awa 3, ọnụego mwepụ COD nke mmiri mkpofu ruru 78%, ọnụego mgbake alkali dị elu ruo 73.55%, na-eje ozi dị ka ọgwụgwọ tupu oge eruo maka nkeji biochemical ndị na-esote. Ejirila teknụzụ electrodialysis gwọọ mmiri mkpofu organic acid dị mgbagwoju anya, nke nwere oke mkpokọta site na 3% ruo 15%, site na Shandong Luhua Petrochemical Company. Usoro a anaghị eweta ihe fọdụrụ ma ọ bụ mmetọ nke abụọ, ngwọta a na-enwetakwa nwere 20% ruo 40% acid, nke enwere ike ịmegharị ma gwọọ, na-ebelata ọdịnaya acid dị na mmiri mkpofu ruo 0.05% ruo 0.3%. Tinyere nke ahụ, ụlọ ọrụ Sinopec Sichuan Petrochemical Company jiri ngwaọrụ electrodialysis pụrụ iche gwọọ mmiri mkpofu condensate, na-enweta ikike ọgwụgwọ kachasị elu nke 36 t/h, yana ọdịnaya ammonium nitrate dị na mmiri a gbakọtara ruru ihe karịrị 20%, ma nweta ọnụego mgbake nke ihe karịrị 96%. Mmiri ọhụrụ a gwọrọ nwere oke nitrogen ammonium nke ≤40mg/L, na-emezu ụkpụrụ gburugburu ebe obibi.
Oge ozi: Sep-07-2023
